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180results about How to "Raw materials are widely available" patented technology

Method for preparing gold nano-rods

The invention discloses a method for preparing gold nano-rods. The method includes the steps: adding chloroauric acid solution and optional gold seed generating regulating agents into CTAB (cetyl trimethyl ammonium bromide) solution, adding silver nitrate solution, weak reducing agents and strong reducing agents into the CTAB solution and reacting at the constant temperature of 25-40 DEG C for 5-30min to obtain reaction liquid A; and adding silver nitrate solution, optional gold nano-rod growth regulating agent solution and water into the reaction liquid A to obtain reaction liquid B, and continuing reaction to obtain the gold nano-rods. The method is simple in process and operation and fine in reproducibility, the diameter of coverage of the prepared gold nano-rods is as small as 5nm to tens of nanometers, LSPR (localized surface plasmon resonance) peak value coverage in the length direction ranges from 630nm to 1010nm, counts in a TEM (transmission electron microscopy) graph indicate that more than 90% of rod products among obtained gold nano-particle products are high in rod yield, and the ratio of an LSPR peak value to a TSPR (transverse surface plasmon resonance) peak value is not lower than 2 in a UV-Vis (ultraviolet visible) absorption spectrogram. Raw materials used in the method are widely and easily obtained, and production cost is low.
Owner:GUANGZHOU CLUSTERBIOPHOTON TECH CO LTD

Aluminum silicate fiber reinforced oxide ceramic and preparation method thereof

The invention relates to aluminum silicate fiber reinforced oxide ceramic. The aluminum silicate fiber reinforced oxide ceramic adopts one or a mixture of more of mullite, aluminum silicate, aluminum oxide and silicon oxide as a ceramic substrate and adopts aluminum silicate fiber as a reinforcing phase. The preparation method comprises the steps: carrying out heat treatment for an aluminum silicate fiber fabric, and removing adhesive on the surface of the fiber; taking oxide sol as a precursor, vacuum impregnating the pretreated aluminum silicate fiber fabric, then carrying out the gelatination, carrying out high-temperature ceramization, and completing primary compacting process; repeating the steps for at least ten times, so as to prepare the aluminum silicate fiber reinforced oxide ceramic. The product is excellent in mechanical property and antioxidant property and has the advantages of short preparation period, low cost, capability of realizing near-net shape and the like.
Owner:NAT UNIV OF DEFENSE TECH

Three-dimensional alumina fiber fabric reinforced oxide ceramic and preparation method thereof

The invention discloses three-dimensional alumina fiber fabric reinforced oxide ceramic. Al2O3, SiO2 and SiOC ceramics are used as a substrate, a three-dimensional alumina fiber fabric is used as a reinforcing body, alumina and silicon dioxide in the substrate are introduced by a sol-gel process, and the SiOC ceramic is obtained by high-temperature cracking of polysiloxane. The preparation method of the three-dimensional alumina fiber fabric reinforced oxide ceramic comprises the following steps: performing vacuum soaking, gelating and high-temperature ceramic treatment on oxide sol serving as a precursor, and repeating for multiple times to obtain an alumina fiber reinforced oxide blank body; soaking the blank body in vacuum by using a polysiloxane-ethanol solution as a precursor, and performing crosslinking and high-temperature ceramic treatment to complete a densifying process; and repeating the steps for multiple times to obtain the oxide ceramic blank body, and oxidizing to prepare the three-dimensional alumina fiber fabric reinforced oxide ceramic. The three-dimensional alumina fiber fabric reinforced oxide ceramic has the advantages of high bending strength, high modulus, good interlaminar shear strength and the like.
Owner:NAT UNIV OF DEFENSE TECH

Preparation of biodegradable block copolyester

The invention belongs to the technical field of macromolecular materials, and in particular relates to a preparation method for biodegradable blocked copolyester. The preparation method comprises the following steps: carrying out esterification reaction between adipate and 1,4 butanediol in the presence of catalyst, wherein the reaction time is 3 to 5h, nitrogen is adopted for protection, the reaction pressure is between 0.1 and 0.8MPa and the reaction temperature is between 130 and 180 DEG C during a first stage; and the reaction time is 1.5 to 5h, the reaction pressure is between 0.3 and 0.6MPa and the reaction temperature is between 150 and 200 DEG C during a second stage so as to generate polybutylene adipate; and carrying out ester exchange reaction of dimethyl terephthalate (DMT) and 1,4 butanediol in the presence of catalyst, wherein the nitrogen is adopted for protection, the reaction time is 2 to 5h, the reaction pressure is between 0.1 and 0.7MPa and the reaction temperature is between 150 and 170 DEG C so as to generate polybutylene terephthalate (pbt); and mixing both prepolymers and carrying out melt copolycondensation reaction under negative pressure, wherein the vacuum degree is controlled to be between 0 and 200Pa, the reaction temperature is between 210 and 260 DEG C and the reaction time is 3 to 8h. The preparation method carries out esterification reaction and ester exchange reaction, and the esterification reaction has two stages so as to effectively reduce secondary reaction of 1,4 butanediol. A prepared product has a characteristic viscosity number above 1.2dl / g, a melting point controlled between 100 and 140 DEG C, a tensile strength between 18 and 37MPa and a breaking elongation ratio from 800 to 1,500 percent.
Owner:TONGJI UNIV

Preparation method of green fluorescent carbon spot and application of green fluorescent carbon spot in cell imaging

The invention provides a preparation method of a green fluorescent carbon spot and an application of the green fluorescent carbon spot in cell imaging, and belongs to the preparation and application field of fluorescent nano materials. The preparation method comprises the following steps: (1) adding petal powder into deionized water to prepare a mixed solution; (2) transferring the mixed solution obtained in the step (1) to a hydrothermal reactor to carry out hydrothermal reactions; (3) subjecting the reaction products obtained in the step (2) to centrifugation and dialysis so as to obtain a green fluorescent carbon spot solution. The plant petal is taken as the carbon source, the raw material is easily available, the preparation method is simple, and the cost is low. The prepared green fluorescent carbon spot has the advantages of good water solubility and high stability, and is capable of being directly applied to cell imaging.
Owner:SHANXI UNIV

Preparation method of ultrathin nano-lithium lanthanum zirconium oxygen all-solid-state electrolyte layer

The invention discloses a preparation method of an ultrathin nano-lithium lanthanum zirconium oxygen all-solid-state electrolyte layer. The method includes: preparation of a nano-lithium lanthanum zirconium oxygen slurry; and film formation from the nano-lithium lanthanum zirconium oxygen slurry. The preparation process is simple, the preparation process has no need for a mold and pressure, the electrolyte layer shapes naturally, the operation is convenient, and the energy consumption is low. The raw materials are wide and easily available, the preparation process is controllable, and the repeatability is high. The solid electrolyte film prepared by the method has thickness up to 1 micrometer.
Owner:ZHEJIANG UNIV

Large-doping-amount slag powder dry mixing mortar using desulphurization gypsum as excitant

The invention belongs to the technical field of a constructional material, in particular to slag powder dry mortar which is mixed in large quantity with desulfuration plaster as an excitant. The slag powder dry mortar consists of cement, powdered slag, desulfuration plaster, lime, sodium sulfate, cellulose ether, emulsion powder and sand. By using the slag powder dry mortar, the solid waste, namely desulfuration plaster, is used efficiently as a resource. In addition, under the circumstance of not reducing the properties of mortar, the problem that the early strength of mortar is low because of large quantity of slag powder mixed. The slag powder dry mortar is applicable for plastering and masonry of ordinary buildings, and can meet the waterproof requirement.
Owner:TONGJI UNIV

Preparation method and application of beta-FeOOH-loaded graphene oxide catalyst

The invention discloses a preparation method and application of a beta-FeOOH-loaded graphene oxide catalyst. The preparation method comprises the following steps: dispersing graphene oxide in water, carrying out ultrasonic treatment so as to obtain uniform dispersion liquid of graphene oxide, then adding ferric trichloride into the dispersion liquid of graphene oxide, carrying out heating in a constant-temperature water-bath so as to load beta-FeOOH onto the surface of graphene oxide and subjecting the obtained product to centrifugation, washing and drying so as to obtain the nanometer beta-FeOOH-loaded graphene oxide catalyst. The catalyst and hydrogen peroxide are added into a dye water body with a certain concentration; and under illumination of visible light, dye chroma is removed, biotoxicity is reduce, and the water body is purified. The catalyst is free of secondary pollution, and an intermediate produced in the reaction has obvious reduced biotoxicity; reaction conditions are mild, and the reaction can be carried out under the condition of visible light; process flow is simple in operation; raw materials used for preparation of the catalyst are easily available; the reacted solid phase catalyst is easy to separate; so the catalyst has good application prospects in the field of water pollution treatment.
Owner:EAST CHINA NORMAL UNIV

High-filler paper and production method thereof

The invention discloses high-filler paper and a production method thereof. The high-filler paper contains 30 to 60 mass percent of filler, and the filler is active calcium silicate; in the step of adding the filler, after the active calcium silicate in an amount which is 40 to 70 percent of the total mass of the active calcium silicate and the pulp is fully stirred and dissolved to form emulsion,the emulsion is guided into a covered pulp storage tank or a pre-making pulp storage tank and fully stirred and mixed with plant fibers; the filler adding proportion of the high-filler paper is improved, so that the consumption of the plant fibers is greatly reduced at the same time of improving the performance of the paper; and according to the production method for the high-filler paper, the adding process of the papermaking filler is simplified, the filler and the plant fibers can be fully mixed uniformly, and the internal bonding force is increased, so that the performance of the paper isimproved.
Owner:GUONENG PAPER IND

Safety belt pre-tightening instrument gas production medicine and preparation method thereof

The gas forming agent for safety belt pre-fastener consists of nitrocellulose 60-90 wt%, combustion improver 1-10 wt%, oxidant 1-20 wt% and adhesive 1-10 wt%. The combustion improver is one or several selected from boron powder and inflammable metal powder; the oxidant is one or several selected from nitrate, chlorate and perchlorate; and the adhesive is one or several selected from phenolic resin, shellac varnish, bone glue, cellulose-base polymer and its salt. The gas forming agent for safety belt pre-fastener has no combustion residue, high gas producing rate and excellent safety belt fastening performance.
Owner:BYD CO LTD

Three-dimensional carbon fiber fabric reinforced mullite ceramic and preparation method thereof

The invention discloses a three-dimensional carbon fiber fabric reinforced mullite ceramic. In the ceramic, mullite is used as a matrix, a three-dimensional carbon fiber fabric is used as a reinforcement body, and a silicon carbide boundary phase is form between the mullite matrix and the three-dimensional carbon fiber fabric reinforcement body by preparing a silicon carbide coating on the surface of the three-dimensional carbon fiber fabric. The invention also discloses a preparation method of the ceramic. The preparation method comprises the following process steps of: preparing the siliconcarbide coating; preparing mullite sol with high solid content; densifying one time; densifying repeatedly, and the like. The mullite ceramic has the advantages of high mechanical property such as high toughness and high intensity; and the preparation method of the mullite ceramic has the advantages of short cycle, low cost and capability of effectively improving the densification of a material.
Owner:NAT UNIV OF DEFENSE TECH

CDs/SiO2 composite fluorescent nano material and one-step preparation method thereof

The invention belongs to the technical field of composite fluorescent nano materials, and discloses a CDs / SiO2 composite fluorescent nano material and a one-step preparation method thereof. The preparation method is a solvothermal method and comprises the following steps: mixing sodium citrate and a silane coupling agent, heating to carry out reactions to obtain a turbid liquid, subjecting the turbid liquid to centrifugation, and finally filtering to obtain the CDs / SiO2 composite fluorescent nano material. In the provided method, the sodium citrate and silane coupling agent directly react, the post treatment using a strong acid or a surface passivating agent is not required, and the composite fluorescent nano material (solid powder) can be rapidly prepared in one step. The raw materials are easily-available, the price is cheap, the reaction conditions are mild, and the yield is high (90% or more). Solved is the problem that the massive production of carbon quantum dots cannot be achieved due to the limitation of technology and raw materials in the prior art. The prepared CDs / SiO2 composite fluorescent nano material has the advantages of good stability, air-slaking resistance, and high light stability, and can be applied to the fields such as photoelectric devices, photocatalysis, biosensors, agriculture, and the like.
Owner:SOUTH CHINA AGRI UNIV

Red fluorescent gold/copper nanocluster alloy as well as preparation method and application thereof

The invention provides a red fluorescent gold / copper nanocluster alloy as well as a preparation method and an application thereof. Egg white is taken as a template and a stabilizer, and the red fluorescent gold / copper nanocluster alloy with uniform size dimension and good stability is prepared from gold / copper in certain mole ratio with a one-pot method. The method is simple to operate, and the raw materials are widely sourced and easy to obtain and has good repeatability; besides, the prepared red fluorescent gold / copper nanocluster alloy has good water solubility and high fluorescent stability, adopts a double-peak structure and can be used for detection of silver ions in a water system, biological cell imaging and the like.
Owner:SHANXI UNIV

Edible composition and use thereof

The invention discloses an edible composition, comprising a probiotic culture. The probiotic culture is obtained by cultivating probiotics by using a culture medium. The edible composition disclosed by the invention has the functions of adjusting intestinal flora, regulating blood sugar level, reducing blood fat and improving the immunity.
Owner:BGI SHENZHEN CO LTD

YAG fluorescent ceramic as well as preparation method and application thereof

The invention discloses a YAG fluorescent ceramic as well as a preparation method and application thereof. Light-emitting center ions of the YAG fluorescent ceramic comprise Ce<3+> and M capable of emitting red light / green light; the molecular formula is (Y1-xCex)3(Al1-yMy)5O12, wherein x is greater than or equal to 0.004 and is less than or equal to 0.5, and y is greater than 0 and is less than or equal to 0.5. The preparation method of the YAG fluorescent ceramic comprises the following steps: uniformly mixing powder of raw materials, molding to prepare biscuits and carrying out high-temperature solid-phase synthesis reaction sintering to prepare the YAG transparent ceramic. After rare earth-doped YAG transparent ceramic is encapsulated with a commercial blue light LED chip, high-qualityemitted light capable of simulating sunlight can be obtained; compared with the rare earth-doped YAG transparent ceramic prepared by a two-step method, the step of synthesizing YAG:Ce<3+>, M fluorescent powder is avoided in the reaction sintering method; the preparation method has the characteristics of simple process and low production cost.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Preparation method of composite biomass improver for remedying heavy metal-polluted soil

The invention discloses a preparation method of a composite biomass improver for remedying heavy metal-polluted soil. The method comprises the following steps: with agricultural waste as a raw material, washing, drying, grinding and screening; soaking in an alkaline solution; after the soaking, washing with dilute acid or water to neutrality; oxidizing with an oxidizing agent such as ozone, hydrogen peroxide or potassium permanganate; with phosphate or phosphate ester as a crosslinking agent and distilled water as a dispersing agent, performing a phosphorylation addition reaction; filtering after complete phosphorylation addition reaction; compounding the phosphorylated biomass with calcium salt by a solution blending method; heating and stirring till complete reaction; filtering and separating out solid materials; washing with a sodium chloride solution and deionized water to neutrality; and drying to obtain a composite biomass improver. The invention has the characteristics of simple preparation method, low cost, no secondary pollution and the like and also solves two major problems of agricultural waste stacking and farmland heavy metal pollution.
Owner:INST OF BIOLOGICAL RESOURCES JIANGXI ACAD OF SCI

Method for processing microorganism synthetic feed using animal manure as raw material and product thereof

The invention provides a method for processing microorganism synthetic feed using animal manure as a raw material. The method comprises the following steps of: diluting bacillus flora powder in water to prepare aqueous solution containing bacillus floras, adding the obtained aqueous solution into fresh terrestrial animal manure, uniformly stirring the mixture, adding all aqueous solution containing anaerobe floras into the terrestrial animal manure treated by the step C, uniformly stirring the mixture, flipping the terrestrial animal manure, controlling the temperature rise caused by the fermentation of the terrestrial animal manure to below 80 DEG C, sterilizing the terrestrial animal manure by the temperature rise caused by the fermentation, and stacking the terrestrial animal manure for 68 to 76 hours; and mixing the synthetic feed product obtained by the treatment of the terrestrial animal manure with corn and / or soybeans. The method aims to provide a method for method for processing the microorganism synthetic feed using the animal manure as a raw material and a product thereof, and the product has the advantages of rich nutrition, rich amino acid, good palatability, big animal feed intake and low feed cost, and can improve the disease resisting ability of livestock, poultry and aquatic animals.
Owner:梁耀棠

Super-stretchable graphene electro-thermal film and preparation method thereof

The invention discloses a super-stretchable graphene electro-thermal film and a preparation method thereof. The electro-thermal film is formed through knitting graphene fibers with a spiral structure; the fibers not only have ultrahigh elongation at break, and can realize rapid response on a high temperature of 30-420 DEG C under safety voltage of 0.5-5V. The preparation method is simple and specifically comprises the following steps: after chemically reducing graphene oxide, carrying out heat treatment in a high-temperature furnace at 500-3000 DEG C to obtain a graphene film; after uniformly winding, obtaining graphene fibers; and knitting the graphene fibers to obtain the graphene electro-thermal film. The graphene electro-thermal film has ultrahigh heating speed and cooling speed, and ultrahigh temperature response; the working voltage is relatively low so that the graphene electro-thermal film can be used for human bodies and is used as human body heating cloth; and the graphene electro-thermal film has a stretchable property so that the graphene electro-thermal film can be adaptive to the movement of the human bodies, such as muscle stretching, in a utilization process, and furthermore, the graphene electro-thermal film can be widely applied as an intelligent electro-thermal material.
Owner:杭州德烯科技集团有限公司

Preparation method and application of copper-doped graphite phase carbon nitride composite material

The invention relates to a preparation method and application of a copper-doped graphite phase carbon nitride composite material, and belongs to the field of composite material preparation and catalysis. The problem of low performance of existing graphite phase carbon nitride and existing composite materials in organic dye degradation under the condition of no sunlight illumination is solved. Thepreparation method of the composite material comprises the steps: using melamine and copper chloride as raw materials and concentrated hydrochloric acid as a solvent, performing stirring at room temperature so as to obtain a yellow precursor, and then performing calcination in an air atmosphere so as to obtain the composite material. The obtained copper-doped graphite phase carbon nitride composite material not only has good photocatalytic performance under visible light illumination, but also efficiently degrades organic dye in the absence of illumination; the composite material has easily available raw materials, low price and simple preparation, the defect of low catalytic performance of the existing graphite phase carbon nitride and existing composite materials under the condition of no sunlight illumination is compensated, and therefore the application prospect is good.
Owner:NANJING UNIV OF TECH

Aluminum silicate fiber reinforced oxide ceramic containing interface phase and preparation method thereof

The invention relates to aluminum silicate fiber reinforced oxide ceramic containing an interface phase. The aluminum silicate fiber reinforced oxide ceramic adopts one or a mixture of more of mullite, aluminum silicate and aluminum oxide as a ceramic substrate and adopts aluminum silicate fiber as a reinforcing phase, and a sacrifice carbon interface phase is formed between the substrate and the reinforced phase. The preparation method of the aluminum silicate fiber reinforced oxide ceramic comprises the following steps: preparing a three-dimensional aluminum silicate fiber fabric, and preparing a pyrolytic carbon coating on the surface of the fiber fabric by utilizing a chemical vapor phase deposition process; taking oxide sol as a precursor, vacuum impregnating the fiber fabric, carrying out the gelatization, then carrying out the high-temperature ceramization, and completing the primary compacting process; repeating compacting for at least 10 times; finally carrying out oxidative cracking on carbon interface phase coating, forming a gap between the aluminum silicate fiber and the substrate, and preparing the product. The product is excellent in mechanical property both at the room temperature and high temperature and has the advantages of short preparation period, low cost, wide applicability and the like.
Owner:NAT UNIV OF DEFENSE TECH

Production of sand-grass straw activated carbon

Production of sabadilla straw active carbon is carried out by washing sabadilla straw, crushing, carbonizing and activating. It has larger pore volume, excellent active carbon specific area and adsorptive ability.
Owner:SHANDONG UNIV

Polyoxyethylene fatty alcohol ether-siloxane copolymer and its preparation method and use

The invention discloses a polyoxyethylene fatty alcohol ether-siloxane copolymer and its preparation method and use. The polyoxyethylene fatty alcohol ether-siloxane copolymer has a general structural formula shown in the patent specification. The preparation method comprises the following steps that 1, polyoxyethylene fatty alcohol ether and one or more alkali compounds are heated in toluene andundergo a reaction to produce an alkali metal salt of polyoxyethylene fatty alcohol ether; and the alkali metal salt of polyoxyethylene fatty alcohol ether and chloropropene undergo a reaction to produce allyl-terminated polyoxyethylene fatty alcohol ether; and 2, the allyl-terminated polyoxyethylene fatty alcohol ether and low-hydrogen content silicone oil undergo a reaction in the presence of one or more platinum catalysts to produce polyoxyethylene fatty alcohol ether-siloxane copolymer oil. The polyoxyethylene fatty alcohol ether-siloxane copolymer can be used as an emulsifier and is added into W / O cream and through the polyoxyethylene fatty alcohol ether-siloxane copolymer, an oil phase containing silicone oil or a complex of silicone oil and other oil can be effectively emulsified so that cream which has excellent stability under the conditions of a high temperature, freezing / unfreezing circulation, a long storage period and insolation is obtained and a W / O cream emulsion which has high viscosity and high stability is obtained. The cream and the W / O cream emulsion have good compatibility with the skin.
Owner:JIANGSU FEIXIANG CHEM

Preparation method of high-purity sphere-like nanometer AlN (aluminum nitride) particle

ActiveCN108862216AReduce charcoal consumptionAlN particles are smallNitrogen compoundsNanotechnologyCarbon dioxideWater soluble
The invention discloses a preparation method of a high-purity sphere-like nanometer AlN (aluminum nitride) particle. The preparation method comprises the following steps of (1) weighing an Al2O3 (aluminum oxide) powder, soluble inorganic salt and a water-soluble organic precursor according to a mass ratio, mixing, adding water, performing ball grinding, spraying and granulating, so as to obtain amicrometer spherical particle; (2) synthesizing the micrometer spherical particle by microwaves under the nitrogen atmosphere in two stages, wherein in the first stage, the room temperature is heatedto the temperature of 800 to 1200 DEG C at the heating speed of 0.1 to 5 DEG C / min, and the increased temperature is warmed; in the second stage, the temperature is increased to 1200 to 1800 DEG C atthe heating speed of 1 to 20 DEG C / min, and the increased temperature is warmed, so as to obtain the nanometer aluminum nitride particle containing trace carbon; (3) decarbonizing the nanometer aluminum nitride particle containing trace carbon under the CO2 (carbon dioxide) atmosphere, so as to obtain the high-purity sphere-like nanometer AlN particle. The preparation method has the advantages that the raw materials are wide and are easy to obtain, the equipment and technology are simpler, the cost is lower, and the preparation technology is especially suitable for industrialized production. The prepared AlN powder has the advantages that the purity is high, the particle size distribution range is broad, the specific surface area is high, and the like.
Owner:HUNAN UNIV

Preparation method for high-purity submicron lithium carbonate

The invention relates to the technical field of chemical separation and purification, especially to a preparation method for high-purity submicron lithium carbonate. The preparation method comprises the following steps: dissolving a crude lithium carbonate product in high-purity water to prepare lithium carbonate slurry; allowing the lithium carbonate slurry to enter a rotary packed bed and introducing CO2 gas into the rotary packed bed so as to prepare lithium bicarbonate liquid; allowing the lithium carbonate liquid to successively pass through a pretreated calcium-magnesium ion exchange resin apparatus and boron ion exchange resin apparatus so as to allow a second solution to be formed after removal of impurities containing calcium, magnesium and boron in the lithium bicarbonate liquid; uniformly mixing the second solution with a dispersant so as to form a third solution and adding the third solution into the rotary packed bed for a reaction so as to produce lithium carbonate precipitate; and drying the lithium carbonate precipitate so as to obtain a high-purity submicron lithium carbonate product. The preparation method employs crude lithium carbonate of the lithium salt industry as a raw material for preparation of the high-purity submicron lithium carbonate; and the raw material is more widely and easily available and cost for the raw material is greatly reduced.
Owner:QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI

Segmented copolymer modified by polyethylene glycol 1000 vitamin E succinic acid ester, preparation method and applications thereof

The invention discloses a caprolactone-lactic acid-glycollic acid segmented copolymer modified by polyethylene glycol 1000 vitamin E succinic acid ester, a preparation method and applications thereof. The segmented copolymer is prepared by forming an ester bond by combing hydroxyl in polyethylene glycol 1000 vitamin E succinic acid ester and carboxyl in a construction unit A; and the construction unit A is a polymer by connecting polycaprolactone, polylactic acid and polyglycolic acid through the ester bond. The copolymer has excellent biodegradability, biocompatibility and nontoxicity, improves and regulates hydrophilcity and biodegradation rate of aliphatic polyester. The segmented copolymer is a new biodegradable polymer, and has wide biomedical applications.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Epoxy resin-nano titanium interface chemical bonding anticorrosive coating and preparation method thereof

The invention belongs to the technical field of coatings and in particular relates to an epoxy resin-nano titanium interface chemical bonding anticorrosive coating and a preparation method thereof. Firstly, a nano titanium filler grafted with epoxy resin is easily fully dissolved and wetted with coating resin, and the nano titanium filler can be uniformly dispersed in the epoxy resin of the coating and can be cross-linked with the coating resin and a curing agent together, so that the epoxy resin-nano titanium interface chemical bonding anticorrosive coating is obtained; and secondly, the metal titanium particle size of the grafted epoxy resin is in a nano scale, the grafted epoxy resin has a huge specific surface area and a good surface nano effect and can form firm interface bonding force with resin in the coating, the defects and pores of the anticorrosive coating are greatly eliminated, the phenomena such as embrittlement cracking and underfilm corrosion occurring on the anticorrosive coating are avoided, and the corrosion resistance of the coating is improved. Finally, the nano titanium filler is wear-resistant, high in strength and high in thermal stability, so that the wear resistance, mechanical properties and heat resistance of the anticorrosive coating are obviously improved.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Preparation method for reinforcing mullite by using three-dimensional carbon fiber fabric

ActiveCN102206089ACeramicizationImprove toughnessFiberCarbon fibers
The invention discloses a preparation method for reinforcing mullite by using a three-dimensional carbon fiber fabric, which comprises the following process steps of: preparing mullite sol with high solid content; selecting the three-dimensional carbon fiber fabric serving as a reinforcing body; compacting once; repeatedly compacting for 12 to 14 times; and the like. In preparation method for reinforcing the mullite by using the three-dimensional carbon fiber fabric, a liquid-phase method and low-temperature vacuum sintering are adopted, so the energy consumption and requirements on equipmentare reduced greatly, the preparation period is shortened, the ceramic is compacted efficiently, and mullite ceramic with high mechanical performance is obtained.
Owner:NAT UNIV OF DEFENSE TECH

Preparation method of zinc oxide nanorod with strong blue-violet light after being excited

The invention discloses a preparation method of a zinc oxide nanorod with strong blue-violet light after being excited. According to the preparation method, a reaction system is composed of soluble zinc salt, alkali, amine, non-aqueous solvent alcohol or ketone, a dispersing agent and a surfactant at the same time; the zinc oxide nanorod is prepared by using a solvent thermal method, so that the nanorod is rich in clearance zinc among crystal lattices and has the advantages of short time consumption, good effect and controllability in nanorod morphology. The nanorod prepared by using the method has a strong blue-violet light emission characteristic, has excellent photocatalysis property as the nanorod is likely to generate photoproduction electron / cavity after being excited under a certain condition, and has tremendous application values.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Environment-friendly printing ink and preparation method thereof

The invention discloses an environment-friendly printing ink, which is prepared from the following raw materials in parts by weight: 15-25 parts of water-soluble acrylic modified resin, 15-20 parts of water-based polyamide resin, 30-40 parts of solvent, and 5-25 parts of pigment. 15 parts, 5-10 parts of soybean oil, 1-2 parts of thinner, 1-1.5 parts of thinner, 1-2 parts of defoamer, 5-10 parts of wear-resistant silicone oil, 2-2 parts of copolymer of vinyl chloride and vinyl acetate 4 parts, 1-2 parts of hollow glass microspheres, 0.5-1 part of pH stabilizer. The invention has reasonable formula, wide and easy-to-obtain raw materials, easy operation, and the prepared printing ink has high adhesion, and can even be used for printing on plastic films with low surface tension. It has the advantages of fast speed, good adhesion, excellent wear resistance, excellent heat resistance, high viscosity and no falling off, and the material used in the present invention is a benzene-free material, which has good environmental protection and broad market prospects.
Owner:桐城市人和包装有限公司

Method for preparing cross-linking acrylamide profile control agent

The invention relates to a method for preparing a cross-linking acrylamide profile control agent. The method comprises the steps of completely dissolving a cross-linking agent through acid, adding an initiator, leading in N2, adding a mixed solution of acrylamide and sulfonyl-containing monomers, performing free radical polymerization reaction in the closed atmosphere of N2 to form a product, causing the product to undergo the nucleophilic addition reaction, and obtaining polymer gel. The method has the advantages that raw materials are extensive, easy to obtain and low in cost; the cross-linking acrylamide profile control agent has good environmental friendliness compared with frequently-used chromic salt and phenolic aldehyde and the like; the viscosity of a system, gelling time and the performances of gel after gelling are controlled through the changing of the concentration or reaction temperature of the monomers, the cross-linking agent and the initiator; when the environment temperature range is 100-140 DEG C, no obvious degradation occurs, and the viscosity retention rate is high; and when the coarse salt concentration range is 0-2.5*105 mg / L, the cross-linking acrylamide profile control agent can have good stability and is not subjected to gel breaking and precipitation.
Owner:DAQING BEIHUA CHEM PLANT
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