53results about How to "Increase the strength of hydrogen bonds" patented technology

The invention relates to a preparation method of high-strength and high-modulus polyvinyl alcohol fine fiber. The polyvinyl alcohol fine fiber is produced by virtue of a boron-bearing gel wet spinning process and is prepared through the steps of spinning dope preparation, solidification formation, hygrothermal stretching and drying formation. According to the polyvinyl alcohol fine fiber prepared by virtue of the preparation method, the tensile strength is more than or equal to 12.5CN / dtex, the elasticity modulus is more than or equal to 280CN / dtex, the incipient melting temperature is more than or equal to 105 DEG C, the linear density is 0.56-1.10dtex, and the breaking elongation is 5-8%; the specific surface area is large, by adding a small amount of the polyvinyl alcohol fine fiber in a papermaking process, the hydrogen bond action force among fibers of formed paper can be substantially enhanced, the tension of the formed paper is large, the filterability and the flexibility of the formed paper are improved, especially the humidity resistance and the breaking strength are increased, and the shrinking percentage in hot water of 95 DEG C can be controlled below 1.5%, so that the polyvinyl alcohol fine fiber can be widely applied to fields of paper for building coverage layers, drug packaging and securities and other special fields.

The invention relates to a method for producing a pasty mask through using a persimmon fruit vinegar film. The mask which adopts a novel raw material persimmon fruit vinegar as a nutrient and allows chitosan lactate, the persimmon fruit vinegar film, sodium alginate and carboxymethyl cellulose sodium to form a blend film improves their respective water retention property, increases the hydrogen bond action force and makes water loss difficulty, so the prepared pasty mask has a good water retention property, and can lock water on the surfaces of skins for a long time; and the full utilization of organic acids comprising lactic acid, acetic acid and the like in the invention can promote the expansion of capillary vessels, increase the skin blood circulation, kill some bacteria on the skins, whiten and nourish faces, and smoothen, brighten and clean skins. The method which allows weak-acidity vinegar treatment to be effectively applied to face skins has the advantages of simple technology and benefiting for the industrial enforcement.

The invention discloses a telescopic anti-freezing full-physical crosslinked hydrogel material for a multi-mode flexible sensor and a preparation method thereof. The hydrogel material is an ionic conductor with a full-physical crosslinked structure and comprises a poly-N-hydroxyethyl acrylamide hydrogen bond network and a chitosan ion crosslinked network. N-hydroxyethyl acrylamide, chitosan and aphotoinitiator are taken as raw materials, and ultraviolet radiation curing and saline solution soaking crosslinking are carried out to obtain the poly-N-hydroxyethyl acrylamide hydrogen bond networkand the chitosan ion crosslinking network. The material has super-compressibility, high tensile strength, high toughness, self-restorability, self-healing property, fatigue resistance and mechanical stability, can maintain good mechanical properties and electrical conductivity in a low-temperature environment, and is expected to be applied to the fields of flexible electronics, wearable electronicequipment, tissue engineering, super capacitors, intelligent robots and the like.

The invention discloses a preparation method of a wet type moisturizing and dust-suppressing agent and belongs to the technical field of environmental protection. The preparation method disclosed by the invention has the beneficial effects that due to existence of double electric layers in modified zeolite powder, alpha-1, 4 glucosidic bond is hydrolyzed from the inner parts of starch molecules ina random mode by utilizing endonuclease of alpha-starch amylase, and soybean isolate protein contains more polar groups along the own peptide chain skeleton, so that wetting and absorption for dust in the air are improved; due to addition of ox bile, the wettability of the dust-suppressing agent can be improved, the surface tension of water can be reduced, the water can be prevented from condensing into droplets and the volatilization rate can be reduced; since oxidized dextrin swells after absorbing water, the filling capacity is also increased, and in addition, due to water-absorbing groupssuch as hydroxyl groups and the like exposed in the oxidized dextrin, the action force of the formed hydrogen bonds is stronger; calcium chloride doped in the oxidized dextrin can permeate into a spatial network structure of an oxidized-dextrin grafting product, and after the dust-suppressing agent falls to the ground, the calcium chloride absorbs carbon dioxide to form hard calcium carbonate, sothat diffusion of the dust can be controlled and the application prospect is wide.

The invention discloses a preparation method of a purple cabbage anthocyanin-collagen chitosan composite intelligent film. The preparation method comprises the following steps: preparing purple cabbage anthocyanin powder from purple cabbage; then adding chitosan into an acetic acid aqueous solution, adding a collagen aqueous solution, continuously adding glycerol and sodium citrate, heating and stirring the mixture in a water bath, and cooling the mixture to obtain a collagen chitosan solution; and adding the purple cabbage anthocyanin powder into the collagen chitosan solution, uniformly stirring the solution, performing standing foaming treatment, injecting the obtained mixed solution into a mold, and drying the solution to obtain the purple cabbage anthocyanin-collagen chitosan composite membrane. The purple cabbage anthocyanin-collagen chitosan composite intelligent film can be applied to freshness indication and fresh-keeping storage of fresh products.

The invention discloses a rice transplanter plastic casing material. The rice transplanter plastic casing material is prepared from, by weight, 3-4 parts of carbon nano tubes, 40-50 parts of thionyl chloride, 3-5 parts of N,N-dimethyl formamide, 100-120 parts of ethidene diamine, 16-20 parts of melamine, 36-40 parts of 35%-37% formaldehyde aqueous solution, 170-200 parts of polyvinyl chloride, 30-40 parts of light calcium carbonate, 18-20 parts of phthalic acid ester, 20-30 parts of 75 wt%-80 wt% sulfuric acid and 30-40 parts of 95 wt%-98 wt% nitric acid. The modified carbon nano tubes, melamine and the formaldehyde aqueous solution are co-polymerized and synthesized into melamine resin, perssad on the surfaces of the modified carbon nano tubes can form hydrogen bonds with amino in the melamine resin and interacts with other polarities, and therefore heat-resisting stability of the composite is improved, and a promotion effect is achieved for improving the structure stability and strength of the finished product.

The invention belongs to the field of water treatment, and discloses a modified composite adsorbent as well as a preparation method and application thereof. The preparation method of the modified composite adsorbent comprises the following steps: adding an aluminum salt aqueous solution into an alkaline solution under stirring until the pH value of an obtained solution is 6.5-7.5, heating an obtained suspension in a sealed manner, filtering, washing, drying and heating to obtain aluminum oxide; adding aluminum oxide in an acetic acid solution of chitosan, adding glutaraldehyde to form a colloid, drying, grinding, washing, drying, adding an obtained chitosan composite aluminum oxide into deionized water, adding a cationic surfactant, stirring, filtering, washing with ethanol and deionizedwater, and drying to obtain a finished product. The preparation method of the modified composite adsorbent is simple, and the adsorbent has the advantages of strong adsorption capacity, high adsorption efficiency on ionic dyes, easiness in separation from a reaction solution, no secondary pollution to the environment and the like, can effectively adsorb the ionic dyes in printing and dyeing wastewater, and is suitable for treating the printing and dyeing wastewater containing the ionic dyes.

The invention discloses a preparation method of aromatic tar-reducing cigarette paper, and belongs to the technical field of paper product preparations. The preparation method is characterized by thata softwood pulp is subjected to alkali cooking treatment to produce a delignified wood pulp; and a mixed gas of propylene and acetyl chloride is introduced into the wood pulp, and trans-3-pentene-2-dione is produced in the wood pulp under a catalytic action of aluminum chloride, so that an aroma-emitting wood pulp is obtained. According to the preparation method, a principle that a Fridel-Craftsreaction of an alkene with an acid halide yields a corresponding alpha,beta-unsaturated ketone is used, after lignin is removed from the wood pulp, burning of the cigarette paper will not produce a wood gas with a sour and astringent taste, and a scent will go into mouth, so that both of the taste and the odor of the cigarette paper are improved; and softwood fiber is long and soft, and has thin cell walls and large cell cavities, so that the softwood fiber is easy to fibrillate during a beating process, and fibers are combined tightly to each other, and after the delignification, the porosityof the fibers is improved, so that the amount of oxygen is increased when a cigarette is burned, thereby making tar fully burned, and achieving a purpose of reducing tar in the cigarettes, therefore,the aromatic tar-reducing cigarette paper has a wide application prospect.

The invention discloses a preparation method for waterproof starch adhesive for wood and belongs to the technical field of a high polymer material. The method comprises the following steps: mixing starch with yeast liquid, standing by and fermenting, and then freeze-drying, thereby acquiring degraded starch; mixing the degraded starch with water, and then adding a cross-linking agent and a catalyst, stirring and reacting and then freeze-drying and crushing, thereby acquiring the cross-linked starch; and mixing the cross-linked starch with water, adding nanometer silicon dioxide, ultrasonicallyoscillating, adding the organosilicone hydrolysate and the catalyst, stirring and reacting and then performing rotary evaporation concentration, thereby acquiring the waterproof starch adhesive for wood. The starch adhesive prepared according to the invention has excellent water resistance and higher adhesive strength.

The invention discloses a nylon blended plastic casing material. The material is prepared from raw materials in parts by weight as follows: 16-20 parts of melamine, 100-120 parts of ethylenediamine, 5-7 parts of polyisoprene, 1-2 parts of sodium potassium tartrate tetrahydrate, 3-4 parts of carbon nanotubes, 40-50 parts of thionyl chloride, 3-5 parts of N,N-dimethylformamide, 160-210 parts of polyvinyl chloride, 20-30 parts of 75wt%-80wt% sulfuric acid, 30-40 parts of 95wt%-98wt% nitric acid, 40-50 parts of nylon PA66, 10-13 parts of dioctyl sebacate, 3-4 parts of lauryl mercaptan, 6-10 parts of polyamide wax micro-powder, 30-40 parts of quartz sand and 36-40 parts of a 35%-37% formalin. According to a plastic casing, polyvinyl chloride and nylon are blended, so that the surface hardness, resistance, waterproof performance and acid and alkali resistance of the finished casing product are further improved.

The invention discloses a carbon nano tube modified plastic shell material. The carbon nano tube modified plastic shell material is prepared from, by weight, 1-2 parts of chitosan, 3-4 parts of carbon nano tubes, 40-50 parts of thionyl chloride, 3-5 parts of N,N-dimethylformamide, 100-120 parts of ethidene diamine, 16-20 parts of ethidene diamine, 36-40 parts of 35-37% formalin, 170-200 parts of polyvinyl chloride, 20-30 parts of 75-80wt% sulfuric acid, 30-40 parts of 95-98wt% nitric acid, 2-3 parts of dodecyl trimethyl ammonium chloride, 20-30 parts of kaolin, 10-14 parts of calcium phosphate, 10-13 parts of butyl acrylate, 0.7-1 part of tributyl tin trichloride, 2-3 parts of tetrabutylammonium bromide and 4-5 parts of stearic acid. The plastic sheet material is environmentally friendly, free of toxins and good in adaptability, and has very good surface resistance in the sun and rain, and protection on the interior of a rice transplanter is high.

The invention discloses a preparation method of a filter tip material, and belongs to the technical field of preparation of filter materials. Based on the principle that olefin and acid halide are subjected to a Friedel-Crafts reaction to generate corresponding [alpha],[beta]-unsaturated ketone, an aluminum chloride solution is dispersed in wood pulp, then mixed gas of propylene and acetyl chloride is introduced into the wood pulp to generate trans-3-pentene-2-ketone, which has a fruity flavor; and unsaturated ketones can react with hydroxyl groups in wood pulp fibers, so that the distance between the fibers and unsaturated ketone molecules is reduced, and the adsorption capacity of the filter tip material on wood offensive gas is enhanced. Roots and rhizomes of Platycodon grandiflorum andlicorice roots in the flavor enhancer can absorb nitrosamine gas in smoke and have the effects of relieving cough and reducing sputum. Sugar in corn flour and protein in egg white can be subjected toa Maillard reaction under a heating condition to generate aroma molecules. Agilawood powder can obviously cover cigarette offensive gas, so that the smoke is fine and mellow, and nitrosamine substances can be converted into nitrosamine salt to be adsorbed in the porous gel of the konjak. The product has a wide application prospect.

The invention discloses a low-surface-energy organosilicone marine antifouling coating. A coating layer cured by the coating can be well bonded with a polar base material by virtue of Van der Waals force and hydrogen bond acting force under the synergistic effect of a thiourea group and an ether group, an excellent bonding effect is still kept even if the coating layer is soaked in a seawater environment for a long time, and the surface of the coating layer has the characteristic of low surface energy, the optimal range of fouling organism prevention and control in a Baier curve is met, and the defect that a traditional organic silicon marine antifouling coating is poor in binding power with the polar base material is effectively overcome. The coating can be widely applied to various aspects of the marine antifouling field, including but not limited to marine ships, marine oil drilling platforms, deep sea detection equipment and the like, and is particularly suitable for equipment immersed in a seawater environment for a long time.

The invention discloses a preparation method of antibacterial tipping paper for water-based ink printing and belongs to the technical field of preparation of tipping paper. According to the method disclosed by the invention, by utilizing a principle that a Friedel-Crafts reaction is carried out between olefins and acid halides to produce corresponding alpha, beta-unsaturated ketones, an aluminum chloride solution is dispersed into wood pulp, so that the prepared tipping paper has caramel aroma, and the flavor of cigarettes is improved. According to the preparation method disclosed by the invention, a sweet potato powder is subjected to hydrolytic degradation under the action of a compound activator of zinc chloride and copper chloride and forms an oligomer, and after reaction dehydration,the intermediate product can be promoted to carry out a condensation reaction. The tobacco leaf fibers used in the invention have the characteristics of being long, soft, thin in cell walls and largein cell lumen, the tobacco leaf fibers are easily broomed, namely fibrillated in the pulping process, pigments in the prepared perillae extract powder can serve as printing ink pigments, and after activated carbon is soaked into an acetone solution of the perillae extract, the perillae extract is distributed in all fine pores of the activated carbon and achieves an inhibitory effect on bacteria breeding around, so that the tipping paper has an excellent antibacterial property.

The invention discloses a rare earth plastic shell material. The rare earth plastic shell material is prepared from the following raw materials in parts by weight: 0.1 to 0.2 part of cerium oxide, 0.1 to 0.2 part of lanthanum citrate, 3 to 4 parts of carbon nanotubes, 40 to 50 parts of thionyl chloride, 3 to 5 parts of N,N-dimethylformamide, 100 to 120 parts of ethylenediamine, 16 to 20 parts of melamine, 36 to 40 parts of 35 to 37% formaldehyde aqueous solution, 170 to 200 parts of polyvinyl chloride, 20 to 30 parts of 75 to 80 wt% sulfuric acid, 30 to 40 parts of 95 to 98wt% nitric acid, 2 to 3 parts of sodium carboxymethylcellulose, 4 to 7 parts of anhydrous calcium chloride, 30 to 40 parts of attapulgite, 2 to 3 parts of dimethylethanolamine and 10 to 13 parts of octyl epoxy stearate. According to the rare earth plastic shell material, the cerium oxide and the lanthanum citrate are added, so that the surface strength of a finished plastic shell product can be effectively increased, and the weather resistance is increased.

The invention provides a method for preparing racemic cis-8-benzyl-2, 8-diazabicyclo [4, 3, 0] nonane. The method comprises the following steps of: step S1, preparing a platinum dehydrogenation catalyst; S2, catalyzing piperidine cyclic dehydrogenation reaction by adopting the platinum dehydrogenation catalyst; and S3, carrying out a catalytic hydrogenation reaction by using a chiral brominated acid catalyst. The method for preparing the racemic cis-8-benzyl-2, 8-diazabicyclo [4, 3, 0] nonane of the invention is high in raceme purity and high in reaction yield.

The invention provides a water-based self-extinction polyurethane leather finishing agent formula and a preparation method thereof. The polyurethane leather finishing agent comprises the following components in parts by weight: 1.0 to 18.03 parts of polyol, 0.83 to 4.66 parts of diisocyanate, 0.006893 to 0.01838 part of a catalyst, 0.44 to 0.5 part of a hydrophilic chain extender, 0 to 0.2 part ofa small molecular chain extender, 0.25 to 0.29 part of a neutralizer, 0.1 to 0.2 part of an antioxidant, 0.1 to 0.2 part of an ultraviolet-resistant absorbent, 7.0 to 10.0 parts of a solvent, 0.2 to0.25 part of cellulose acetate butyrate, 62.0 to 64.9 parts of water, 0.3 to 0.4 part of foam-free penetrating agent, 0.55 to 1.6 parts of amine chain extender, 0.3 to 0.4 part of silicone emulsion and 1.4 to 2.5 parts of alkali swelling thickening agent. By means of the technical scheme, the prepared water-based self-extinction polyurethane leather finishing agent is stable in extinction and adjustable in extinction degree, the finished leather is soft in hand feeling, an extinction coating does not turn bright after hot pressing, the product placement performance is stable, and the workshopproduction reproducibility is good.

The invention provides an oral instant film preparation containing a 2-oxo-1-pyrrolidine derivative as well as a preparation method and application thereof. The oral instant film preparation containing the 2-oxo-1-pyrrolidine derivative comprises the following components in percentage by mass: 10%-80% of an active component 2-oxo-1-pyrrolidine derivative, 20%-90% of a high-water-solubility film-forming material, 0.5%-10% of a plasticizer and 0.5%-5% of a mixture formed by mixing a stabilizer, a corrigent and an opacifying agent. The oral instant film preparation has the advantages of good taste, no need of drinking water, high bioavailability and convenience in use, can be quickly dissolved in the oral cavity, and overcomes the technical defect of inconvenience in clinical medication of the existing dosage form. In addition, the production process of the oral instant film preparation provided by the invention is simple, convenient and low in cost, and related pharmaceutic adjuvants are wide in source and easy to purchase, so that the oral instant film preparation has good social benefits and economic benefits.

The invention discloses an antiaging transplanter plastic casing material which is prepared from the following raw materials in parts by weight: 1-2 parts of sodium sulfite, 3-4 parts of carbon nanotube, 40-50 parts of thionyl chloride, 3-5 parts of N,N-dimethylformamide, 100-120 parts of ethylenediamine, 16-20 parts of melamine, 36-40 parts of 35-37% formalin, 170-200 parts of polyvinyl chloride, 20-30 parts of 75-80 wt% sulfuric acid, 30-40 parts of 95-98 wt% nitric acid, 3-4 parts of polyphthalic diamide, 1-2 parts of 2-mercaptobenzimidazole, 0.6-1 part of N-isopropyl-N'-phenyl-p-phenylenediamine, 2-3 parts of diniconazole, 10-13 parts of polycarbamate and 30-40 parts of fluorite powder. The plastic casing has the advantages of high aging resistance, long service life, high weather resistance, high strong adaptability to the environment and excellent comprehensive properties.

The invention provides a formula and a preparation method of a water-based polyurethane ink vehicle for flexible packaging. The formula comprises the following components in parts by weight: 18.99-20.36 parts of polyols, 1.29-3.3 parts of diisocyanate, 0.01174-0.016 parts of a catalyst, 0.6-0.8 parts of a hydrophilic chain extender, 0.14-0.35 parts of a small molecular chain extender, 0.4-0.53 parts of a neutralizer, 0.1-0.2 parts of an antioxidant, 0.1-0.2 parts of an ultraviolet light resistant absorbent, 3.0-4.0 parts of a solvent, 0.2-0.25 parts of cellulose acetate butyrate, 34.8-37.3 parts of water, 0.3-0.4 parts of a low-foam penetrating agent and 0.4-1.5 parts of an amine chain extender. By means of the technical scheme, the prepared waterborne polyurethane ink vehicle has good environmental protection performance, a formed film is not crisp, excellent flexibility and excellent high-temperature steaming resistance are achieved, and the use conditions of food flexible packagingare met.

The invention discloses a high-degradation modified plastic particle, belongs to the technical field of preparation of degradable plastic particles, and aims at solving the problems that a polyethylene product is low in degradation speed and usually needs dozens or even hundreds of years to be naturally degraded, and serious harm is caused to the environment along with abuse of the polyethylene product. The high-degradation modified plastic particle is prepared from the following raw materials in parts by weight: 30 to 40 parts of polyethylene, 10.2 to 16.8 parts of lignocellulose, 20 to 30 parts of modified starch, 0.2 to 0.6 part of cellulose degrading enzyme, 10.2 to 15.6 parts of pigment and filler, 1.3 to 5.4 parts of a coupling agent, 3.2 to 5.4 parts of a dispersing agent, 1.3 to 5.5 parts of a stabilizer, 1.2 to 5.8 parts of a plasticizer, 1.2 to 3.2 parts of an antioxidant and 2.8 to 5.6 parts of a degradation agent. The degradation agent is added in preparation, so that the prepared high-degradation modified plastic particles have biodegradation and photodegradation properties at the same time.

The invention belongs to the technical field of silk processing, and particularly relates to a treatment method of improving acid-base resistance of mulberry silk. The method comprises the following steps of: (1) putting the mulberry silk in a erythritol aqueous solution for heat preservation soaking, draining off the solution, fishing out the mulberry silk, performing magnetization treatment andvacuum treatment when no water drips, and (2) soaking the mulberry silk in treatment liquid, performing ultrasonic treatment, draining off the liquid, fishing out the mulberry silk, and performing freezing treatment, steam treatment and microwave drying when no water drip, wherein the treatment liquid is prepared from the following raw materials: taurine, sodium benzoate, gallic acid, chlorogenicacid, fructus momordicae polysaccharide and water. The flexibility and elasticity of a silk fiber structure are effectively improved; the surface of the silk fiber structure is covered with a compactprotection film, so that the mulberry silk can have the better acid-base resistance; the tensile property and flexibility of the mulberry silk are effectively improved under an acid-base condition; the quality of the mulberry silk is greatly improved under the acid-base condition; and the usability of the mulberry silk is improved.

The invention relates to the technical field of oil sludge treatment, and discloses an oil base mud and landing oil sand treatment device and technology. A first extraction kettle, a second extractionkettle, a mud cleaning deposition tank and a centrifugal dryer are included. A mixing assembly is arranged in the first extraction kettle and comprises a first feeding pipe, a second feeding pipe anda discharging pipe. The discharging pipe stretches into the first extraction kettle. A rotation rod is rotationally connected in the first extraction kettle. The end portion of the rotation rod is connected with a mixing piece mixing disc located above the discharging pipe. The oil base mud and landing oil sand treatment device and technology have the following advantages and effects that an extraction agent and a collaborative extraction agent are injected into a tank, the extraction effect is improved, the extraction agent and the collaborative extraction agent which upwards flow are scattered on the rotating mixing disc, the contact area with mud is increased, and the extraction effect is improved; and in addition, oil base mud is sequentially extracted through supercritical CO2 and supercritical n-butane or iso-butane, light oil and heavy oil in the oil base mud are extracted, and the oil content of the mud is reduced.

The invention discloses an antistatic plastic shell material. The antistatic plastic shell material is prepared from, by weight, 10-15 parts of tributyl citrate, 3-4 parts of carbon nanotubes, 40-50 parts of thionyl chloride, 3-5 parts of N,N-dimethylformamide, 100-120 parts of ethidene diamine, 16-20 parts of melamine, 36-40 parts of a formaldehyde aqueous solution with the concentration of 35%-37%, 170-200 parts of polyvinyl chloride, 20-30 parts of sulfuric acid with the concentration of 75 wt%-80 wt%, 30-40 parts of nitric acid with the concentration of 95 wt%-98 wt%, 2-3 parts of formamide, 2-3 parts of dodecyl dimethyl betaine, 4-6 parts of fatty acid polyglycol ester, 3-4 parts of ammonium molybdate, 4-7 parts of calcium stearate, 1-2 parts of p-toluene sulfonic acid and 10-14 parts of silica powder. According to the material, by adding dodecyl dimethyl betaine, fatty acid polyglycol ester and the like, the antistatic property of the surface of a plastic shell can be effectively improved, and the use safety is improved.

The invention discloses a method for preparing corrugated paper wood pulp. The method comprises the steps of 1) pulverizing wood leftovers, immersing the wood leftovers in an acidic solution, and placing in a high frequency electric field for polarization treatment; 2) immersing materials after drying in raw material treatment liquid; 3) adding the treated materials to clean water, adding potassium citrate for beating, and then adding a complex enzyme for enzymatic hydrolysis; 4) adding diatomaceous earth and montmorillonite powder to crude pulp after high-temperature heating sterilization, stirring at a high speed, and then conducting screening, mechanical extrusion and defibrination to obtain the wood pulp. The wood pulp is energy-saving and environmentally friendly, and a paper productprepared by using the pulp has high strength, strong toughness, long service life and wide prospects for popularization and application.

The invention belongs to the technical field of space leather bass, and particularly relates to an aqueous dispersion of polyurethane or polyurethane urea, a preparation method of the aqueous dispersion, a water-based space leather bass and a preparation method of the water-based space leather bass. Polyurethane or polyurethane polyurea contained in the aqueous dispersion is prepared from the following components: (a) dihydric alcohol and / or polyhydric alcohol; (b) diisocyanate and / or polyisocyanate; (c) a hydrophilic compound comprising ionic and / or latent ionic groups and comprising 2-3 NCO reactive functional groups; (d) a nonionic hydrophilic compound; (e) a cyclic compound reactive to isocyanates and comprising hydroxyl and amino functional groups; (f) a silane coupling agent comprising hydroxyl and amino functional groups; (g) a neutralizing agent; and (h) a small molecule compound containing an amino group. The obtained aqueous dispersion is high in flocculation speed, good in flocculation effect and good in storage stability. The obtained space leather base is high in peel strength and excellent in normal and low temperature flexure resistance and chemical resistance.

The invention discloses a rigid plastic casing material. The rigid plastic casing material is prepared from raw materials in parts by weight as follows: 2-3 parts of 8-hydroxyquinoline, 3-4 parts of carbon nano tubes, 40-50 parts of thionyl chloride, 3-5 parts of N,N-dimethylformamide, 100-120 parts of quadrol, 16-20 parts of melamine, 36-40 parts of 35%-37% formalin, 170-200 parts of polyvinyl chloride, 20-30 parts of 75%-80% sulfuric acid, 30-40 parts of 95%-98% nitric acid, 30-40 parts of heavy calcium carbonate, 4-6 parts of aluminum-magnesium silicate, 1-2 parts of lauryl dimethyl amine oxide, 2-3 parts of zinc naphthenate, 14-16 parts of glycerol triacetate, 0.3-1 part of ascorbic acid and 2-4 parts of lithium carbonate. A plastic casing is hard, has high strength and good anti-impact performance and is not prone to damage.

The invention discloses a flame retardant plastic shell material. The flame retardant plastic shell material is prepared from, by weight, 1-2 parts of fatty acid diethanol amide, 3-4 parts of carbon nano tubes, 40-50 parts of thionyl chloride, 3-5 parts of N-dimethyl formamide, 100-120 parts of ethylenediamine, 16-20 parts of melamine, 36-40 parts of a 35-37% formaldehyde solution, 170-200 parts of polyvinyl chloride, 20-30 parts of 75-80wt% sulfuric acid, 30-40 parts of 95-98wt% nitric acid, 30-40 parts of talcum powder, 10-13 parts of tributyl citrate, 3-4 parts of pentaerythritol, 4-6 parts of ammonium polyphosphate, 10-12 parts of polytetrafluoroethylene wax, 3-4 parts of allyl polyethylene glycol and 1-2 parts of ferrous sulfate. The talcum powder, the ammonium polyphosphate and the like are added into the flame retardant plastic shell material, the flame retardant performance of finished plastic is effectively improved, and the use safety is improved.

An alkali-resistant polyimide fiber is disclosed, and is prepared mainly as follows: adding one or two of two monomers of 2-(4-amino phenyl)-5-amino benzimidazole or 2-(4-amino benzene)-6-amino-4(3 H)-quinazolinone for copolymerization with other aromatic diamine and aromatic dianhydride for synthesis. Compared with P84 series polyimide fibers commonly used in a market, the environment-resistant performances of the alkali-resistant polyimide fiber in acidic environment influences, alkaline environment influences, organic solvent environment influences, uv (ultraviolet) irradiation influences and other aspects (especially the alkali-resistant performance) are greatly improved. The alkali-resistant polyimide fiber has the characteristics of high preparation efficiency, low raw material cost, low energy consumption and the like, and can be used for large-scale industrial production and replacement of the P84 series polyimide fibers.

The invention discloses an anti-corrosion rice transplanter plastic shell material which is prepared from, by weight, 27-30 parts of coarse whiting, 2-4 parts of monopotassium phosphate, 3-4 parts of carbon nano tubes, 40-50 parts of thionyl chloride, 3-5 parts of N,N-dimethyl formamide, 100-120 parts of quadrol, 16-20 parts of melamine, 2.6-3 parts of locust bean gum, 36-40 parts of 35-37% formalin, 170-200 parts of polyvinyl chloride, 20-30 parts of 75-80 wt% of sulfuric acid, 30-40 parts of 95-98 wt% of nitric acid, 0.8-1 part of methyl heptenone 1-2,2-methyl-4-Isothiazolin-3-ketone, 2-3 parts of 2-octyl-2H-isothiazol-3-one, 1-2 parts of sodium diacetate, 7-10 parts of salatrim and 0.1-0.2 part of sp80. A group on the modified carbon nano tube surface and amidogen in melamine resin can form a hydrogen bond or other active interactions, so that the heat-resisting stability of a composite material is improved, and the finished product structural stability strength can be improved.