34 results about "Macromolecule modification" patented technology

The invention provides carbon nano tubes modified by polymers with maleic anhydride chain segments and a preparation method of the carbon nano tubes. The carbon nano tubes are processed in one-step acidification treatment with concentrated sulfuric acid and concentrated nitric acid, and then have reaction with thionyl chloride after being processed in two-step acidification treatment with concentrated sulfuric acid and hydrogen peroxide. The product obtained from the above process has reaction with dihydric alcohol to obtain the modified carbon nano tubes with hydroxyl. Then the carbon nano tubes modified by polymers with maleic anhydride chain segments are obtained by means of the polymerization reaction between the hydroxyl and the polymers with maleic anhydride chain segments. Thereby, the carbon nano tubes can disperse into the composite materials well, the compatibility of the carbon nano tubes with the other materials are improved, so that the carbon nano tubes can take the advantages maximally and realize the functional design and application.

The present invention provides a macromolecule modified carbon nano-tube made by in situ polymerization and the related preparation method. Concentrated sulfuric acid and concentrated nitric acid are used for the first-step acidification treatment of the carbon nano-tube; then concentrated sulfuric acid and hydrogen peroxide are used for the second-step acidification treatment; afterward, the acidified carbon nano-tube reacts with dichloride sulfoxide and the product will then react with diol to produce a modified carbon nano-tube with hydroxyl; finally, the carbon nano-tube containing polymerizable double bonds is obtained after the pre-reaction between hydroxy and maleic anhydride. The carbon nano-tube containing polymerizable double bonds and maleic anhydride have in situ polymerization reaction with substances containing double bonds and then are connected on the external surface of the carbon nano-tube so that the carbon nano-tube can be well dispersed into composite materials to improve the compatibility between the carbon nano-tube and other materials in order to maximize the advantages of the carbon nano-tube and realize the functionalized design and application of the carbon nano-tube.

The invention provides a preparation method of a new adsorbent, the method uses a dendritic polymer to modify a graphene oxide adsorption material, and the graphene oxide adsorption material modified by the dendritic polymer can effectively adsorb lead ions, cadmium ions, manganese ions, copper ions and other heavy metal ions in wastewater. The method is as follows: first using graphite powder as a raw material to prepare multilayer graphene oxide by concentrated sulfuric acid, potassium permanganate and hydrogen peroxide oxidation, fully dissolving the graphene oxide in ethanol with the aid of ultrasonic, then adding a certain amount of the dendritic polymer for water bath reaction at 30-80 DEG C for 6 to 48 hours, performing vacuum suction filtration of an obtained product, then washing with the ethanol, and then drying at 50-100 DEG C to obtain a heavy metal adsorption material. SEM (scanning electron microscope) pictures show that the adsorbent has a loose structure, and the adsorbent has a good application prospect in heavy metal adsorption field. Adsorption experiments show that, under the condition of normal temperature, the adsorbent has a good adsorption capacity to the lead ions, cadmium ions, manganese ions and copper ions, and especially has a strong adsorption capacity to the lead ions, and the maximum adsorption amount can reach 300mg / g above.

The invention discloses a polycaprolactone / calcium sulfate composite material and a preparation method thereof, belonging to the field of macromolecule modification. The method comprises the following steps: utilizing biosurfactant to carry out surface modification on anhydrous calcium sulfate or calcium sulfate whiskers; and adopting a coprecipitation and mould pressing method to prepare anhydrous calcium sulfate or calcium sulfate whiskers reinforced polycaprolactone composite material. The composite material prepared by the method in the invention has the advantages of high mechanical strength and adjustable performance, thereby laying a foundation for the application thereof.

The invention discloses a method for preparing a carbon nano tube loaded nano nickel powder material by a liquid-phase reduction method, relating to a method for preparing the carbon nano tube loaded nano nickel powder material and aiming at solving the problems that the carbon nano tube loaded nano nickel powder body material with uniform dispersion on a carbon nano tube and stable chemical performance of nickel is prepared by the liquid-phase reduction method under the condition that a macromolecular modifier is not added. The method comprises the steps of: (1) carrying out acidizing treatment on the carbon nano tube; and (2) adopting the liquid-phase reduction method to carry out loading of nano nickel powder on the acidized carbon nano tube. The carbon nano tube loaded nano nickel powder material prepared by the method has the advantages that the macromolecular modifier impurities are not contained, and the nickel has uniform dispersion on the carbon nano tube and stable chemical performance. The invention provides an executable method capable of preparing the carbon nano tube loaded nano nickel powder material with uniform dispersion on the carbon nano tube and stable chemical performance of the nickel.

The invention discloses a carbon-silicon composite electrode material and a preparation method thereof. The carbon-silicon composite electrode material can improve the effective dispersity of silicon-containing particles on the surfaces of carbon-containing particles by coating the carbon-containing particles and the silicon-containing particles with organic high-molecular modified films. The carbon-silicon composite electrode material can comprise a carbon-containing conducting film coating the surface of the carbon-silicon composite electrode material to improve effective adhesion of the silicon-containing particles. The preparation method of the carbon-silicon composite electrode material can be completed in an aqueous-phase solution through dry mixing. Therefore, damage of volatile organic compounds to an operator and environment can be effectively avoided. According to the carbon-silicon composite electrode material and the preparation method, the carbon-silicon composite electrode material can effectively improve the electric capacity, the charging and discharging efficiency and the cycle life of a battery product using the carbon-silicon composite electrode material.

The invention discloses a method for detecting imidacloprid by quantum-dot-marked sandwich fluorescence immunoassay. According to the technical scheme, the method comprises the following steps of: 1, preparing a nuclear shell quantum dot and modifying the water solubility of a fat-soluble quantum dot by modification of different macromolecules; 2, preparing and passivating a quantum probe; and 3, constructing an imidacloprid antibody quantum dot immunoassay method. The method is applied to preparation, passivation and performance representation of the quantum dot and detection of precipitate imidacloprid residues and is a fluorescence immunoassay method for sensitively and quickly detecting the imidacloprid in vegetables based on the quantum dot and conjugates of IgG-HRP.

The invention discloses a PNIPAM-RGO graphene composite material. A preparation method comprises the steps that azobis(isobutyramidine)hydrochloride is adopted as an initiator, valence bonds of the initiator is immobilized on a graphene oxide substrate, and then the graphene composite material modified by smart macromolecules is prepared through atom free radical polymerization. The PNIPAM-RGO graphene composite material has different responses for temperature changes, various electrochemical technologies are used for researching the smart electrochemical response of a PNIPAM-RGO modified electrode, and a research result shows that the PNIPAM-RGO modified electrode has the advantages of both PNIPAM and RGO, namely the good smart responsivity of the PNIPAM and the good electronic transmission of the RGO. In the research, detection of the PNIPAM-RGO / GC modified electrode on the dopamine electrochemical catalysis performance and concentration under different temperatures is further explored.

The invention discloses a preparation method of a macromolecular modified self-supporting carbon nanotube assembling membrane. The method mainly comprises the following steps: carrying out ultrasonic reaction through utilizing a mutual effect between a macromolecular material and carbon nanotubes and taking water as a solvent; centrifuging and separating to obtain a macromolecular modified carbon nanotube solution; diluting the prepared macromolecular modified carbon nanotube solution with de-ionized water; filtering in vacuum to a micro-filtration membrane of mixed cellulose with the pore diameter of 0.22 microns; after drying, removing a base membrane to obtain the macromolecular modified self-supporting carbon nanotube assembling membrane with the membrane thickness of 1mu.m to 3mu.m and the permeation flux of 3100Lm<-2>h<-1>bar<-1> to 4600Lm<-2>h<-1>bar<-1>. A preparation process is simple and easy to operate; compared with a traditional phase inversion ultra-filtration membrane, the membrane thickness of prepared ultra-filtration membrane is greatly reduced and the utilization of raw materials is reduced; compared with other ultra-filtration membranes which are prepared by vacuum replication and self-assembling, the membrane strength is improved to the great extent; the ultra-filtration membrane prepared by the method can be used for separating oil-containing wastewater.

The present invention discloses a detection method for cross-linking degree of a reverse osmosis membrane. According to the method, a non-woven fabric layer of a reverse osmosis membrane is completely stripped, a separation layer and a support layer are remained; the separation layer and the support layer are flatly pasted on a glass substrate, wherein the support layer is positioned on the surface, and the separation layer contacts with the glass substrate; according to the solubility difference between the separation layer and the support layer, a proper volatile organic solvent is selected to dissolve and remove the support layer; a treatment of vacuum drying is performed to remove the organic solvent in the separation layer; a X-ray photoelectron spectrometer is adopted for carrying out sputtering stripping for the surface of the separation layer; finally mole percentage contents of two elements comprising oxygen and nitrogen are exactly detected, and are substituted into a formula to calculate the cross-linking degree of the reverse osmosis membrane. According to the present invention, the cross-linking degree of the reverse osmosis membrane can be exactly detected; the influence on the detection result due to the polymer-modified layer on the surface of the reverse osmosis membrane is avoided; the method has characteristics of simple sample pretreatment process, low cost, strong operability and easy popularization; the technical blank in exact detection of the cross-linking degree of the reverse osmosis membrane with the surface modification layer is filled.

The invention relates to a preparation method for biocompatible magnetic microspheres collaboratively modified by two macromolecules and suitable for carrying of medicines or genes. The preparation method is simple, the experiment repeatability is high, and that magnetic microspheres are modified by two macromolecules in situ can be realized in the preparation process. According to the requirements of carrying of the medicines and the genes, the magnetic microspheres have the following properties simultaneously: the content of magnetic materials is high, surface biocompatibility and macromolecule modification are achieved, the magnetic microspheres are formed by assembling nano-crystal grains, and the intergranular gaps are obvious, so that carrying of medicines or gene substances is facilitated, and the magnetic microspheres have good colloid stability in water and PBS; the particle diameter of each magnetic microsphere is 100-250 nanometers, the sizes of original crystal grains and the assembled microspheres can be regulated, the macromolecule coating quantity can be regulated, and the assembly compactness of the crystal grains can be regulated, so that the novel method for preparing magnetic micro-nano materials provided with biocompatibility and capable of effectively carrying the medicines or the genes is provided.

The invention discloses an intelligent nanometer blocking agent for water-based drilling fluid and a preparation method thereof. The intelligent nanometer blocking agent is prepared from, by weight, 20-82 parts of intelligent polymer-modified magnetic nanoparticles, 3-45 parts of polyethylene glycol and 0.5-24 parts of polytetramethylene glycol. The preparation method includes the steps that the intelligent polymer-modified magnetic nanoparticles are added into water, polyethylene glycol is added with constant stirring, the mixture is subjected to a reaction for 3-5 hours, polytetramethylene glycol is added, the mixture is subjected to a reaction for 4-7 hours, water is evaporated, the product is dried for 4 hours at 60-75 DEG C, and then the intelligent nanometer blocking agent for the water-based drilling fluid is obtained. The preparation method has the advantages that the hydrophilia and hydrophobicity of the intelligent nanometer blocking agent can change correspondingly along with different formation temperatures and drilling fluid pH values, so that in the shale formation drilling process, while micro pores in the well wall are physically blocked, a water molecule repelling effect is achieved, water is chemically restrained from approaching the well wall, and then the water blocking performance of the drilling fluid is significantly improved.

Disclosed are an oxalate hydrogenation Au-Ag bimetallic catalyst and a preparation method thereof, which relate to catalysts. The oxalate hydrogenated Au-Ag bimetallic catalyst comprises, by mass percentage, 2-12% of Au, 0.5-5% of Ag and the balance being carriers. The formula of the catalyst is x%Au-y%Ag / carriers, wherein the x% is the mass percentage of Au of the catalyst, and the y% is the massage percentage of Ag of the catalyst. The preparation method includes: modifying the carriers with high polymer, preparing a precursor of the catalyst by adding components of Au and Ag, reducing the precursor of the catalyst at an hydrogen-containing atmosphere, and finally obtaining the oxalate hydrogenated loaded Au-Ag bimetallic catalyst. With the preparation method, methyl glycollate or ethylene glycol can be prepared selectively by controlling reaction temperature. The catalyst prepared by the preparation method has the advantages of excellent low-temperature catalytic activity, fine catalytic stability, long service life and the like.

The invention relates to a preparation method of a core-shell magnetic / gold nano composite particle. Firstly, a magnetic Fe3O4 nano cluster is prepared through a solvothermal method and wrapped with macromolecules possessing positive electricity in situ in the preparation process, the magnetic cluster modified with the macromolecules is used as a seed, chloroauric acid is subjected to mild reduction directly through a one-step method, core forming and growth of a gold particle on the surface of a magnetic inner core are finished by one step, and therefore, the magnetic / gold nano composite particle is obtained. The nano particle is good in water dispersibility, has superparamagnetism and is high in magnetic response. The composite particle is 80-250 nm in diameter and can be used for the fields such as drug and gene delivery, photo-thermal therapy and protein nucleic acid separation and enrichment.

The invention belongs to the fields of luminous materials and dope, and relates to a method for performing organic polymer modification on the surface of noctilucent powder (a long-afterglow luminousmaterial of an alkaline-earth aluminate system). The method aims at the defects of poor storage stability of a dope system and influence on subsequent application due to large density and easy sedimentation of the noctilucent powder; a specific vinyl silane coupling agent is adopted; an organic polymer clad body with an obvious flocculent loose structure is obtained by selecting a reaction mediumand controlling the pH value; the anti-settling performance of the organic polymer clad body is effectively improved; meanwhile, the water resistance is obviously improved; the organic polymer clad body can be widely applied to an aqueous and solvent type dope system; and moreover, the method has the wide application prospect in the fields of plastic, printing ink, chemical fiber, resin and the like.

The invention discloses mesoporous carbon nanoparticles modified by macromolecules and the application thereof in preparation of drug carriers. The macromolecules refer to PVP (Polyvinyl Pyrrolidone)or DSPE-mPEG2000. According to the invention, the well aligned mesoporous carbon nanoparticles are synthetized through a low-concentration hydrothermal method, the macromolecule with biocompatibilityis used for modification through strong absorption of the mesoporous carbon nanoparticles, so that the hydrophilia and the dispersibility of the mesoporous carbon nanoparticles are improved. Through aseries of representations and cellular uptake experiments, the following conclusions are drawn: the synthetic well aligned mesoporous carbon nanoparticles are about 90 nm in diameter, uniform in nanoparticles and well aligned in mesoporous passages. PVP (Polyvinyl Pyrrolidone) and DSPE-mPEG2000 are successfully used for modification onto the surfaces of mesoporous carbon nanoparticles, so that the hydrophilia and the dispersibility of the mesoporous carbon nanoparticles are improved, the mesoporous carbon nanoparticles can be taken in by normal cells and cancer cells within 2 hours, to assemble on cytoplasm. The mesoporous carbon nanoparticles provided by the invention can be used as excellent drug carriers, and can be targeted at tumor tissues through an EPR (enhanced permeability and retention) effect.

The invention discloses a method for stabilizing heavy metal pollutants in soil by using macromolecule modification polymers. The method comprises the following steps: matching and mixing following raw materials according to a weight ratio, wherein the weight ratio of a titanate coupling agent to 1-n-butyl alcohol zirconate to polyethylene terephthalate (PET) to polyvinyl alcohol (PVA) to water is 1:1:6:10:100; injecting the obtained mixture into the soil polluted with the heavy metals and standing for 2 days; detecting whether a mixture injection area is condensed; and if so, finishing a stabilizing process. According to the technical scheme disclosed by the invention, the method has the advantages of simple design, convenience in operation, no need of complex treatment equipment, low cost, complete treatment and no secondary pollution.

The invention relates to a dual-metal catalyst, and in particular relates to an oxalate hydrogenation Cu-Au dual-metal catalyst and a preparation method of the catalyst. The invention provides the oxalate hydrogenation Cu-Au dual-metal catalyst which is environment-friendly, low in Cu load, excellent in catalytic performance and high in stability, and the preparation method of the catalyst. The oxalate hydrogenation Cu-Au dual-metal catalyst consists of Cu, Au and a carrier, and has the composition of x% of Cu-y% of Au / carrier, wherein x% is the mass percent of Cu in the catalyst, and y is the mass percent of Au in the catalyst. The preparation method comprises the steps of: firstly, using high polymer to modify the carrier; then, adding the components of Cu and Au to prepare a precursor of the catalyst; reducing the precursor of the catalyst in the hydrogen atmosphere; and finally obtaining the oxalate hydrogenation Cu-Au dual-metal catalyst.

The invention discloses a method taking waste shaddock peel as a raw material to prepare a shaddock peel based waste biomass macromolecule adsorbing material through macromolecule modification. The method comprises the following steps: shaddock peel powder is dispersed in water, and shaddock peel powder dispersion liquid is obtained; a functional monomer containing a carboxyl functional group is dissolved in an NaOH aqueous solution and is added into the shaddock peel powder dispersion liquid, a cross-linking agent is added then and stirring is performed for 0.5-2 h; the temperature is raised to 50-60 DEG C, an initiating agent is added, stirring is performed under the protection of inert gas, and reaction is carried out for 0.5-1 h; the temperature is continuously raised to 65-75 DEG C, the initiating agent is added again, stirring is continuously performed for reaction lasting for 1-3 h, and after the reaction is completed, filtration, washing, drying and grinding are performed, and the shaddock peel based waste biomass macromolecule adsorbing material is obtained. The results of adsorptive property tests shows that the shaddock peel based waste biomass macromolecule adsorbing material has a very strong adsorptive property for dye methylene blue, the adsorption rate is high, and the material can be suitable for adsorption in different environments. In addition, the preparation process of the method is simple, the cost is low, and the industrial production is facilitated.

The invention relates to pole piece slurry for preparing a lithium ion battery. The pole piece slurry comprises an electrode active material and an electrically conductive agent, and further comprisesa polymer modifier attached to the surface of the electrically conductive agent, with the polymer modifier being a bismaleimide polymer. The invention also relates to an electrode plate produced fromthe pole piece slurry and a pole piece slurry manufacturing method.

The invention discloses a preparation method of hydrogel based on rhabdovirus. The virus hydrogel is composed of macromolecule-modified rod-shaped composite virus particles, and the rhabdovirus is fd bacteriophage. The preparation method comprises the following steps of: preparing a thermo-sensitive polymer solution; preparing a virus solution of the fd bacteriophage; dropwise adding the thermo-sensitive polymer solution into the virus solution to obtain thermo-sensitive macromolecule-modified composite virus particles; and dissolving the polymer-modified virus particles in a phosphoric acid buffer solution to obtain a solution, and heating the solution to a temperature higher than the gelation transformation temperature to obtain the hydrogel based on rhabdovirus. The preparation method disclosed by the invention has the advantages that the virus hydrogel has good biocompatibility and can generate quick and reversible sol-gel transformation at a specific gelation temperature point; massive chemical functional groups on the surface of the rhabdovirus can be bound with specific-function groups as chemical reaction hot spots; and after gel formation, the active groups on the skeleton surface are still available, and the hydrogel can be used as an insulin sustained-release intelligent material.

Disclosed are an oxalate hydrogenation Au-Ag bimetallic catalyst and a preparation method thereof, which relate to catalysts. The oxalate hydrogenated Au-Ag bimetallic catalyst comprises, by mass percentage, 2-12% of Au, 0.5-5% of Ag and the balance being carriers. The formula of the catalyst is x%Au-y%Ag / carriers, wherein the x% is the mass percentage of Au of the catalyst, and the y% is the massage percentage of Ag of the catalyst. The preparation method includes: modifying the carriers with high polymer, preparing a precursor of the catalyst by adding components of Au and Ag, reducing the precursor of the catalyst at an hydrogen-containing atmosphere, and finally obtaining the oxalate hydrogenated loaded Au-Ag bimetallic catalyst. With the preparation method, methyl glycollate or ethylene glycol can be prepared selectively by controlling reaction temperature. The catalyst prepared by the preparation method has the advantages of excellent low-temperature catalytic activity, fine catalytic stability, long service life and the like.

A preparation method for a targeting contrast agent for intestinal tracts comprises synthesis of a ferriferrous oxide nanometer particle modified by a functional high molecule and modification of an antibody. The targeting contrast agent for intestinal tracts has the advantages that the nanometer ferriferrous oxide particle is taken as a medium and is connected with a specific antibody for forming the contrast agent for intestinal-tract targeting property, so that the problem that conventional contrast agents are bad in targeting property is avoided. Employed raw materials are high in biological safety, and parts of the raw materials are commercial products. The prepared contrast agent possesses good physical chemical stability, biological compatibility and magnetic resonance imaging performance. The preparation method is simple in technology and high in operationality, and is capable of further satisfying production and application requirements.

The invention discloses a preparation method and application of a multifunctional PCS hybridized nanometer fiber biomedical elastomer. Macromolecule PCS with good biological compatibility and good photoluminescence is adopted and compounded with multifunctional nanometer fibers to prepare the PCS hybridized nanometer fiber biomedical elastomer. According to a thermal polymerization method for usage, the synthesized elastomer is modified and wrapped by macromolecules to obviously reduce ion release in the nanometer fibers, accordingly, biological toxicity is reduced, meanwhile, an original photothermal effect is kept, and an original antibacterial effect is kept. In this way, in the preparation method, the nanometer fibers and PCS conduct a polymerization reaction through a mild chemical method to form the multifunctional PCS hybridized nanometer fiber biomedical elastomer, and the multifunctional PCS hybridized nanometer fiber biomedical elastomer can be used for synthesizing an antibacterial and degradable multifunctional PCS-CSNW nanometer composite elastomer capable of conducting near infrared photo-thermal treatment, and can be used for synthesizing a multifunctional PCS-LHNW nanometer fiber composite material with fluorescence enhancement and magnetic imaging.