765 results about "Graft reaction" patented technology

The invention discloses a medium-temperature curing high-temperature-resistant high-adhesion epoxy structural adhesive film as well as a preparation method and application thereof. The preparation method comprises the following steps: reacting high-rigidity diisocyanate with polyether polyol to obtain a polyurethane prepolymer, then adding bisphenol epoxy resin to carry out grafting reaction, and then adding carboxyl-terminated nitrile rubber to react with an epoxy group to obtain the high-temperature-resistant high-adhesion epoxy resin. And finally, mixing with a curing system and coating to obtain the intermediate-temperature curing high-temperature-resistant high-adhesion epoxy structural adhesive film. The preparation process disclosed by the invention is reasonable, and the high-temperature resistance of the adhesive film is remarkably improved by introducing high-rigidity groups such as naphthalene ring, biphenyl or p-benzene while the excellent processing property of the adhesive film is ensured; and through the synergistic effect of the polyurethane flexible chain segment and the nitrile rubber, the toughness and the adhesive property of a resin system are improved, and the loss of the resin in the forming process is reduced.

The invention relates to a waterborne polyurethane sizing agent, a preparation method thereof and a carbon fiber, and belongs to the technical field of carbon fiber preparation. The preparation method of the waterborne polyurethane sizing agent comprises the following steps: S10, dispersing and mixing amino modified polydimethylsiloxane and graphene oxide in an organic solvent, carrying out grafting reaction, and carrying out vacuum drying to obtain amino modified polydimethylsiloxane grafted graphene oxide; s20, mixing polyether glycol, diisocyanate and a hydrophilic chain extender, and carrying out a first reaction to obtain a first reaction solution; mixing the first reaction liquid, a small molecule chain extender and amino modified polydimethylsiloxane grafted graphene oxide for second reaction to obtain a polymerization system; and carrying out a neutralization reaction on the polymerization system and a neutralizer, and dispersing in water to obtain the waterborne polyurethane sizing agent. The waterborne polyurethane sizing agent can effectively increase the surface roughness of carbon fibers and improve the interfacial shear strength between the carbon fibers and a resin matrix.

The method comprises the following steps: (1) putting 1-vinyl imidazole into a flask containing N, N-dimethylformamide and D314 type resin, adding an initiator, carrying out a grafting reaction under the action of the initiator, and obtaining imidazolyl anion exchange resin after the reaction is finished; (2) pre-treating the imidazolyl anion exchange resin, and then adsorbing a rhenium-containing solution to be treated by adopting the pre-treated imidazolyl anion exchange resin; and (3) washing the imidazolyl anion exchange resin subjected to saturated adsorption in the step (2) by using ultrapure water, and then analyzing by using ammonia water to obtain a high-purity rhenium-containing solution. According to the method, the imidazolyl anion exchange resin is synthesized, the imidazolyl anion exchange resin has excellent selective adsorption capacity on rhenate ions, and efficient separation of rhenium and other impurities can be achieved when the imidazolyl anion exchange resin is applied to the rhenium-containing solution.

The invention discloses a silane cross-linked polyolefin halogen-free flame-retardant cable material and a low-energy-consumption preparation method thereof.The preparation method comprises the steps that EVA / EEA serves as a matrix, silane groups are covalently connected to a polyolefin molecular chain through a free radical grafting reaction, and a grafting material containing an active silane side group is prepared; meanwhile, vinyl isocyanate is adopted to chemically modify hydroxyl on the surface of magnesium hydroxide, vinyl is grafted to the surfaces of particles, the polarity of the particles is reduced, and the dispersity of the particles is enhanced; then carrying out melt blending on the grafted material and modified magnesium hydroxide, constructing an interface bridge by using an anhydride group, and shortening the two-phase distance; finally, through room-temperature natural cross-linking and warm water auxiliary cross-linking, silane groups are promoted to be hydrolyzed into silanol, the silanol is condensed to form a-Si-O-Si-three-dimensional network, meanwhile, vinyl on the surface of magnesium hydroxide and a polyolefin matrix are subjected to free radical copolymerization, and a covalent bond interface layer is formed between inorganic particles and an organic matrix. According to the method, the synergistic improvement of high crosslinking degree, strong stretchability and excellent flame retardance of the cable material is realized through molecular-level interface regulation and cross-linking network optimization.

The invention relates to the technical field of chinlon industrial yarns, and discloses a preparation method of a high-strength and high-toughness chinlon industrial yarn, which comprises the following steps: (1) preparing raw materials; (2) mixing the materials; (3) melt spinning; (4) stretching and heat treatment; (5) fiber surface modification; according to the invention, by fusing the advantages of high crystallization speed of nylon 6 and high melting point and high strength of nylon 66, a matrix material with good processing fluidity is formed, and the strength and fatigue cycle resistance of the chinlon industrial fiber are obviously improved. By introducing the maleic anhydride grafting agent, polar groups can be introduced among molecular chains through grafting reaction, so that the hydrogen bond density and crystallinity are remarkably improved, the molecular chains are arranged more regularly, and the tensile strength and heat resistance of the material are improved. The sea-island structure of the polyether ester elastomer effectively absorbs impact energy, so that the elongation at break is greater than or equal to 28%; the nano silicon dioxide inhibits crack propagation, and the service life of the material is remarkably prolonged.

The invention belongs to the technical field of insulator materials, and particularly relates to an insulating busbar and a preparation method thereof. The preparation method of the insulating busbar comprises the following steps: coating glue on the surface of a busbar base material, and drying to obtain a busbar with a bonding layer; the preparation method comprises the following steps: mixing 40 to 60 parts of silicon resin, 20 to 40 parts of grafted silicon dioxide, 10 to 20 parts of aluminum oxide and 2 to 4 parts of 2, 5-dimethyl-2, 5-bis-(tert-butylperoxy) hexane, so as to obtain a sizing material; placing the busbar with the bonding layer in a mold, then adding a sizing material, and pressing to obtain an insulating busbar; the preparation method of the grafted silicon dioxide comprises the following steps: stirring m-aminobenzoic acid and 3-aminopropyltriethoxysilane for reaction to obtain a grafting solution, and adding silicon dioxide into the grafting solution for grafting reaction to obtain the grafted silicon dioxide.

The invention provides an anti-compression master batch and a preparation method thereof as well as a low-compression-deformation foaming material and a preparation method thereof, and the anti-compression master batch is prepared by taking TPU (Thermoplastic Polyurethane) with carbon-carbon double bonds as a matrix, high-resilience rubber as a modifier and phenolic resin as an initiator through melt grafting reaction. The anti-compression master batch is added into a foaming material formula, the obtained foaming material is excellent in performance, the compression deformation resistance, the thermal shrinkage performance and the rebound resilience of the foaming material are greatly improved, and the foaming material has high application value.

The invention relates to the technical field of high polymer materials, in particular to high-strength and high-toughness modified plastic particles as well as a preparation method and application thereof. The preparation method of the high-strength and high-toughness modified plastic particles comprises the following steps: carrying out a reaction on MMT / CNTs and diisocyanate to prepare isocyanate-based MMT / CNTs; the preparation method comprises the following steps: reacting isocyanate-based MMT / CNTs with glycerol 1, 3-diglycerol alkyd diacrylate to prepare MMT / CNTs containing alkenyl groups; the preparation method comprises the following steps: carrying out grafting reaction on maleic anhydride, alkenyl-containing MMT / CNTs and POE (Polyolefin Elastomer) to prepare a modifier; and carrying out melt blending, extrusion, cooling and pelletizing on the modifier, the auxiliary agent and PA6 to obtain the high-strength and high-toughness modified plastic particles. The nano filler MMT / CNTs and the polyolefin elastomer POE are introduced, so that the modified plastic particles taking the PA6 as the matrix have high strength and high toughness.

The invention relates to the technical field of cable materials, in particular to a flame-retardant efficient cross-linked polyolefin cable body and a preparation method thereof. The cable body comprises a polyolefin matrix, 2, 4-dihydroxy-6-methyl benzamide, an intumescent flame retardant, dicumyl peroxide, an antioxidant, a light stabilizer and a lubricant, wherein the polyolefin matrix is subjected to synergistic modification by phosphorus-nitrogen heterocyclic silane-plasma. The preparation method of the polyolefin matrix synergistically modified by phosphorus-nitrogen heterocyclic silane-plasma comprises the following steps: performing grafting reaction on polyolefin resin and phosphorus-nitrogen heterocyclic silane under the action of an initiator, and performing plasma surface treatment to endow the material with dual active sites. The preparation method comprises the following steps: melting and granulating a polyolefin matrix subjected to phosphorus-nitrogen heterocyclic silane-plasma synergistic modification, small organic molecules and auxiliaries, and performing extrusion molding under a crosslinking condition to obtain a cable body. The material disclosed by the invention has comprehensive advantages in flame-retardant efficiency, crosslinking degree and mechanical property, and is suitable for manufacturing high-safety power cables.

The invention discloses a method and equipment for detecting oxidized low-density lipoprotein based on immunoturbidimetry, and the method comprises the following steps: preparing a macroinitiator by active esterification reaction, and preparing a block graft copolymer by atom transfer radical polymerization and radical grafting reaction; the preparation method comprises the following steps: carrying out surface modification on latex microspheres with different particle sizes by using a grafted copolymer, and then respectively coupling the microspheres with different particle sizes with different OxLDL monoclonal antibodies so as to prepare a double-particle-size latex microsphere marker; and mixing the serum sample with the double-particle-size latex microsphere marker, measuring an absorbance value, and calculating the concentration of the oxidized low-density lipoprotein in the serum sample according to a standard curve established on the basis of the standard substance solution. According to the scheme, the stability of the latex microsphere marker can be enhanced, and the binding efficiency of the latex microsphere marker and ox-LDL can be improved.

The present application provides a preparation method for a filtrate reducer and the use thereof. The preparation method comprises: dropwise adding a silane coupling agent containing double bonds into a graphite dispersion under an acidic condition for grafting reaction to obtain silane-coupling-agent-modified graphite, then adding a cross-linking agent into the silane-coupling-agent-modified graphite, adjusting the pH to neutrality to obtain a first intermediate solution, mixing acrylamide, a sulfonic monomer, a cationic monomer and a monomer containing a cyclic group, then adjusting the pH to neutrality to form a second intermediate solution, finally adding an initiator into the first intermediate solution, then dropwise adding the second intermediate solution for polymerization reaction to obtain the filtrate reducer. The filtrate reducer prepared by such a method has a better high-temperature-resistant filtrate loss reduction property, and better pressure bearing capacity and plugging capacity.

The invention discloses a preparation method of a photo-thermal anti-icing and deicing super-amphiphobic coating, which comprises the following steps: firstly, adding TiN nanoparticles into a dopamine solution, so that dopamine is subjected to an auto-polymerization grafting reaction on the surfaces of the TiN nanoparticles to obtain PDA-TiN nanoparticles; dispersing the PDA-TiN nanoparticles, the SiO2 nanoparticles, the epoxy resin and the epoxy resin curing agent into absolute ethyl alcohol, adding TEOS and FAS, and dispersing; stirring the dispersion liquid twice to obtain uniformly dispersed spraying liquid; meanwhile, dispersing epoxy resin and an epoxy resin curing agent into absolute ethyl alcohol, spraying dispersion liquid onto a substrate material, and depositing an epoxy resin layer on the surface of the substrate material; and finally, uniformly spraying the spraying liquid on the surface of the epoxy resin layer, and then sequentially carrying out two times of solvent volatilization to obtain the photo-thermal type anti-icing and deicing super-amphiphobic coating loaded substrate material. A re-entering micro-nano structure and low surface energy required by the photo-thermal super-amphiphobic surface are formed on the substrate material through a spraying method and are used for preventing and removing ice.

The invention provides a water-based floating aluminum pigment and a preparation method thereof.The preparation method of the water-based floating aluminum pigment comprises the steps that an aluminum pigment and a silane coupling agent are subjected to a grafting reaction in the presence of an alkaline regulator, the silane coupling agent is grafted to the surfaces of aluminum particles, and a pretreated aluminum pigment is obtained; and carrying out polymerization reaction on the pretreated aluminum pigment, a hydrophilic monomer and a hydrophobic monomer under the condition of an initiator, and coating the surfaces of aluminum particles with an amphiphilic polymer to obtain the water-based floating aluminum pigment. According to the water-based floating aluminum pigment and the preparation method thereof provided by the invention, after the aluminum pigment is modified by using a silane coupling agent, the surfaces of aluminum particles are coated with a layer of amphiphilic polymer, so that the floating performance of the obtained aluminum pigment is improved, and meanwhile, the corrosion-resistant effect of the aluminum pigment is improved.

The invention discloses a preparation method and application of a bifunctional acrylate monomer modified polypropylene coarsening film for an extremely cold-resistant oil-immersed capacitor, and belongs to the technical field of manufacturing of electronic and electrical insulating materials. The invention relates to application of a bifunctional acrylate monomer modified polypropylene coarsened film in an extremely cold resistant oil-immersed capacitor or a thin film capacitor. The preparation method comprises the following steps: (1) respectively adding a polypropylene coarsened film, a monomer, an interface agent, a co-monomer, an initiator and deionized water in certain parts by weight into a reactor, and heating for swelling; (2) heating the reaction system to a certain temperature, and carrying out grafting reaction; and (3) washing, extracting and drying. According to the invention, the bifunctional acrylate is used as a monomer to carry out long-chain branching modification on the polypropylene coarsened film, so that the problem of poor performance of a capacitor in an extreme environment caused by low-temperature embrittlement and high-temperature insulation deterioration of the polypropylene coarsened film is solved. The method has the advantages of good effect, environmental protection, simple process, low cost and the like.

The invention discloses a preparation process and application of a modified anti-segregation admixture for machine-made sand, and relates to the technical field of polymer modified materials. Modified polyoxyethylene ether and vinyltrimethoxysilane are adopted to construct a steric hindrance effect, styrene-acrylate emulsion is introduced to form an interpenetrating network structure, and nano silicon dioxide and bentonite are cooperated to construct a multi-scale enhancement system. Silane coupling agent hydrolysis and nano grafting reaction are realized through gradient heating, and the particle size distribution D90 of the emulsion is less than or equal to 5 microns by combining an ultrasonic-mechanical synergistic emulsification process. A three-dimensional network is formed by the composite thickening agent and anhydrous sodium sulfate, and after in-situ curing at 25 DEG C with RH greater than or equal to 80%, 0.1-0.5% of the additive is added, so that the slump retention value of the machine-made sand concrete is greater than 315mm (1h), the pressure bleeding rate is less than or equal to 9.7%, the 28d compressive strength is improved by 24.5-72.6 MPa, and the segregation resistance coefficient is reduced to 0.08-0.11. The technology breaks through the limitation of insufficient adaptability of traditional admixtures to machine-made sand, and is particularly suitable for long-distance pumping construction of high-stone-powder-content machine-made sand concrete.

The invention belongs to the technical field of polyester master batches, and particularly relates to a damp-heat-resistant ultraviolet barrier polyester master batch and a preparation method thereof. The invention discloses an anti-ultraviolet polyethylene glycol terephthalate composite material, which is prepared from the following raw materials in parts by weight: 85 to 90 parts of polyethylene glycol terephthalate, 10 to 15 parts of anti-ultraviolet agent, 3 to 5 parts of epoxy-terminated polyether and 1 to 3 parts of lubricant, wherein the anti-ultraviolet agent is a modified intermediate obtained by modifying a nano light screening agent by a carboxylic ester coupling agent according to a mass ratio of (3 to 5): 100; the modified intermediate and a hydroxybenzophenone derivative are subjected to a grafting reaction according to the mass ratio of 100: (5-8); the nano light screening agent is selected from one or a combination of two or more of nano zinc oxide, nano titanium dioxide, nano cerium oxide, nano tin antimony oxide and nano carbon black. The dispersion effect of the anti-ultraviolet agent in the master batch is improved, and the ultraviolet barrier and the light transmittance are improved; meanwhile, the anti-ultraviolet agent is subjected to ester exchange with PET in the screw extrusion process, so that the interaction with PET is enhanced, migration in a humid and hot environment is avoided, and the ultraviolet shielding performance is lasting and stable.

The invention relates to a preparation method of an environment-friendly flame-retardant aluminum nitride silica gel composite film in the field of new materials, which comprises the following steps: selecting a silane coupling agent to carry out surface modification treatment on spherical aluminum nitride according to surface energy distribution characteristics, and introducing hydrophilic groups on the surface of the spherical aluminum nitride through chemical grafting reaction; a hydrophilic group is grafted on the surface of spherical aluminum nitride by adopting a silane modification method, and the hydrophilic group is hydroxyl or carboxyl, so that the surface activity and hydrophilicity are improved; mixing the silane-modified spherical aluminum nitride with a silica gel matrix to obtain dispersity data of the mixture, and judging whether the dispersity of the filler is uniform or not and the standard deviation of particle size distribution is less than 0.5 mu m; according to the dispersity data of the mixture, the filling amount of the spherical aluminum nitride is adjusted, and the heat conduction performance, thermal expansion performance and heat resistance data of the composite material under different filling amounts are obtained, so that the heat conduction coefficient of the composite material film is larger than 18 W / (m.K), the thermal expansion coefficient is smaller than 30 ppm / DEG C, and the heat resistance temperature is higher than 200 DEG C.

The invention discloses a preparation method and application of active cationic chitosan nanoparticles, which comprises the following steps: reacting a low-molecular chitosan triethylamine hydrogen sulfate ionic liquid ([(C2H5) 3NH] HSO4) solution with an aldehyde compound ethanol solution to form Schiff base protection on chitosan C2-site amino, and then reacting with 2, 3, 5, 6-tetramethyl-4-piperidine-2-one to obtain the active cationic chitosan nanoparticles. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on chitosan C6 in the presence of a basic catalyst by using 2, 3-epoxypropyl trimethyl ammonium chloride, then adding a chemical initiator, carrying out grafting reaction on chitosan C3 and acrylic acid, and then removing Schiff base protection on chitosan C2. Carboxylate anions of acrylic acid and cations of chitosan are subjected to cross-linking self-assembly through a hydrothermal reaction, and the chitosan nanoparticles which are high in stability, small in particle size, uniform in distribution and efficient and lasting in function are obtained. The prepared nanoparticles are high in reaction activity, contain a large amount of quaternary ammonium salt, amino dication groups and carboxyl groups, and have wide application prospects in the fields of dye adsorption, heavy metal adsorption, textile function finishing and the like.

The invention provides a functional nanofiber material as well as a preparation method and application thereof, and the preparation method comprises the following steps: (1) adding raw materials into water to form an electrostatic spinning solution; performing electrostatic spinning to obtain a nanofiber membrane; (2) cross-linking the nanofiber membrane in an organic solvent under the catalysis of acid to obtain a cross-linked nanofiber membrane; and (3) carrying out grafting reaction on the cross-linked nanofiber membrane in a polyamine cross-linking agent, and then reacting with a sulfur-containing reagent to obtain the functional nanofiber material, the functionalized nanofiber material prepared by the preparation method disclosed by the invention combines good biocompatibility of polyvinyl alcohol, high specific surface area and high porosity of nanofiber and a synergistic adsorption effect of the polyamine cross-linking agent and cysteine, and has the advantages of large adsorption capacity, high adsorption rate, strong selectivity, good biocompatibility, stable structure and the like; the heavy metal ions in the plasma can be efficiently and safely removed, and a plurality of defects of the existing adsorption material are overcome.

The invention discloses a method for preparing high-melt-strength polypropylene by using a bifunctional acrylate monomer, and relates to a method for preparing the high-melt-strength polypropylene by using bifunctional acrylate as a monomer long-chain branched modified polypropylene. The invention aims to solve the problem that the application capability of polypropylene is influenced due to low strength of polypropylene melt. The method comprises the following steps: 1, adding polypropylene particles, a bifunctional acrylate monomer, an interface agent, a co-monomer, an initiator and deionized water into a reactor, and heating for swelling; 2, heating the reaction system, and carrying out a grafting reaction; and 3, washing, extracting and drying the grafted product to obtain the bifunctional acrylate modified high-melt-strength polypropylene. The grafting effect of the high-melt-strength polypropylene is regulated and controlled by regulating and controlling the preparation process, so that the melt strength of the polypropylene is improved, and the application performance of the polypropylene is further improved. The method is applied to the technical field of polymer materials.

The invention discloses a modified polyurethane resin, a semi-cured material, a composite material and a preparation method of the modified polyurethane resin, the semi-cured material and the composite material. Part of an initial polyurethane molecular chain is opened to become a resin intermediate containing an initial polyurethane molecular fragment with an active group or a resin intermediate containing an initial polyurethane molecular fragment with a chain extension group; the preparation method comprises the following steps: preparing a resin intermediate, changing the resin intermediate into modified polyurethane containing an initial polyurethane molecular fragment with an active double-bond group through a grafting reaction, and curing the modified polyurethane into modified polyurethane resin, or mixing the modified polyurethane with reinforcing materials such as filler or fiber and the like to obtain the modified polyurethane resin. And curing to obtain the composite material based on the thermosetting modified polyurethane resin. In the process, the molecular weight and molecular structure of initial polyurethane are adjusted by designing and controlling chemical reaction, and modified polyurethane with target performance, a semi-cured material and a composite material based on the resin are obtained by designing and controlling additives.

The present invention belongs to the field of polyester industrial filaments, and relates to methods for preparing a softening flame retardant and preparing a high-strength flexible flame-retardant polyester industrial yarn. The softening flame retardant is silicon dioxide which is surface grafted with polydimethylsiloxane; a preparation method therefor comprises subjecting silicon dioxide and hydroxyl-terminated polydimethylsiloxane to a grafting reaction to obtain the softening flame retardant; and the use thereof is to use the softening flame retardant and low-viscosity polyester chips as main raw materials to prepare a softening flame-retardant polyester masterbatch, which is then subjected to melt-blending and spinning together with high-viscosity polyester chips, so as to prepare a high-strength flexible flame-retardant polyester industrial yarn, wherein the intrinsic viscosity of the low-viscosity polyester chips is 0.65-0.68 dL / g, and the intrinsic viscosity of the high-viscosity polyester chips is 1.05-1.20 dL / g. The preparation methods of the present invention are simple; the flexibility and flame retardancy of the polyester industrial yarn can both be improved after the prepared softening flame retardant is added to the polyester industrial yarn as an additive; and the obtained high-strength flexible flame-retardant polyester industrial yarn has good performance.

The invention relates to the field of materials, and discloses a modified carbon fiber and a self-repairing carbon fiber composite material and method.The preparation method of the modified carbon fiber comprises the steps that carbon fibers are subjected to an oxidation reaction to obtain oxidized carbon fibers, the oxidized carbon fibers and a silane coupling agent are subjected to a grafting reaction to obtain epoxy group functionalized carbon fibers, and the epoxy group functionalized carbon fibers are subjected to a self-repairing reaction to obtain the self-repairing carbon fiber composite material. The epoxy-functionalized carbon fiber and a polymer containing an S-S structure are subjected to a ring-opening reaction, the modified carbon fiber is obtained, and a preparation method of the polymer containing the S-S structure comprises the step that a polyurethane prepolymer and a disulfide monomer are subjected to a polymerization reaction, and the polymer containing the S-S structure is obtained. According to the method, the S-S structure is introduced to the surface of the carbon fiber, the thermal reversible reaction of the S-S structure is repeatedly utilized, so that the multi-time self-repairing capability of the interface of the composite material is realized, and the damaged part of the carbon fiber composite material can be conveniently and effectively repaired by adopting the method disclosed by the invention without influencing other undamaged parts of the material.

The invention discloses a preparation method of a high-performance boehmite coating diaphragm based on photocuring interface grafting, and belongs to the technical field of lithium ion battery materials. The method comprises the following steps: carrying out surface vinyl activation on boehmite particles, and carrying out plasma activation on a polyethylene diaphragm base material; mixing the activated boehmite particles with a thiolated polyurethane acrylate solution containing a photoinitiator to prepare slurry; and after coating, carrying out ultraviolet irradiation in a wet coating state, synchronously initiating acrylate polymerization, sulfydryl-alkene click reaction and free radical grafting reaction, and finally drying and curing to obtain the product. By constructing a covalent bonding interface, the interface bonding strength, the thermal stability and the electrochemical performance of the diaphragm are remarkably improved, the problem that a traditional coated diaphragm is easy to peel off is solved, and the preparation method is suitable for manufacturing a high-performance lithium ion battery.

The present application relates to a kind of powder coating hydroxyalkylamide matting curing agent and its preparation method, the matting curing agent using including citric acid, 2-methyl-1,3-propanediol, dimethylbenzene, anhydrous methanol, N-methyl monoethanolamine, catalyst, nanometer titanium dioxide is reacted to obtain raw materials.In first, citric acid and 2-methyl-1,3-propanediol are grafted to carry out reaction, then the remaining four carboxyl groups of grafting are methyl esterification reaction, obtain methyl esterification product, then with N-methyl monoethanolamine acylation reaction obtains hydroxyalkylamide curing agent;Add nanometer titanium dioxide, fully mix and process to obtain the matting curing agent.The curing agent product functionality is higher, the hardness of coating film after curing is higher, and the boiling water resistance is excellent;And the coating film after curing has obvious matting effect, coating film gloss is basically reached 50-70%, and the decorative property is excellent.

The invention discloses a gelatinized and / or micronized nucleoside drug and a preparation method thereof, and belongs to the technical field of drugs. The preparation method comprises the following steps: mixing lipoic acid, a nucleoside drug and an esterification catalyst, carrying out a grafting reaction in a reaction solvent to obtain a lipoic acid grafted nucleoside drug, dispersing the lipoic acid grafted nucleoside drug in an organic solvent to obtain a dispersion liquid, dropwise adding the dispersion liquid into hot water, and carrying out ring opening polymerization to obtain the lipoic acid grafted nucleoside drug. The nucleoside drug nanogel, nanoparticle or nanofiber is obtained, and the structure and performance improvement based on the drug itself is realized. The gelated and / or micronized nucleoside medicine prepared by the invention has obviously improved scavenging rates of DPPH free radicals and ABTS free radicals, and the method can improve the oxidation resistance of the nucleoside medicine and has the characteristic of improving the stability and functionality of the medicine.

The invention provides a cordyceps militaris mycelium and a preparation method and application thereof, and relates to the technical field of biological materials. According to the invention, chitinase is added into the cordyceps militaris mycelium material to carry out enzymolysis on chitin to obtain chitooligosaccharide and N-acetylglucosamine, so that beta-glucan in a mycelium framework is dissolved out, and the grafting efficiency of the cordyceps militaris mycelium material is improved; furthermore, the antibacterial effect of the antibacterial material is improved by carrying out grafting reaction on the cordyceps militaris mycelium material and an exogenous monomer antibacterial peptide which has antibacterial performance and contains carboxyl groups.

The invention discloses a high-temperature-resistant flame-retardant wire harness and a preparation method thereof, and relates to the technical field of electric harnesses. The method comprises the following steps: firstly, introducing phosphorus and silicon flame-retardant elements on a polyethylene molecular chain through plasma activation and free radical grafting reaction to prepare phosphorus-silicon grafted modified polyethylene, then compounding aminated silicon dioxide and organic intercalated montmorillonite by using isophorone diisocyanate as a bridging agent to prepare the phosphorus-silicon grafted modified polyethylene composite material. The preparation method comprises the following steps: preparing an isocyanate-bridged silicon dioxide-montmorillonite composite filler to improve the dispersity and compatibility of the filler in a matrix, carrying out extrusion granulation on modified polyethylene, an ethylene-butyl acrylate copolymer, maleic anhydride grafted polyethylene, the composite filler, nano magnesium hydroxide and other additives to prepare polyethylene wire harness particles, and finally, carrying out extrusion granulation on the polyethylene wire harness particles to prepare the cable harness. And coating the surface of a copper core wire with the particles through a single-screw extrusion coating machine, and carrying out subsequent water cooling, steam treatment, drying and rolling to obtain a finished wire harness. The wire harness prepared by the invention has excellent high temperature resistance and flame retardance.

The invention provides an SBS asphalt modifier and a preparation method thereof, self-adhesive modified asphalt and a preparation method thereof, and a self-adhesive modified asphalt waterproof coiled material, and belongs to the technical field of waterproof materials. The preparation method of the SBS asphalt modifier comprises the following steps: adding SBS into naphthenic oil, heating to a dissolution temperature, and stirring until the SBS is completely dissolved to obtain an SBS solution; adding a polymerizable monomer containing C10-C30 linear alkyl into the SBS solution, and uniformly mixing to obtain a mixed solution; adding a free radical polymerization initiator into the mixed solution, and carrying out a free radical grafting reaction in an inert atmosphere; and adding a terminating agent to terminate the reaction to obtain the SBS asphalt modifier.

The invention discloses an anti-wear weather-resistant super-amphiphobic coating, a coating as well as a preparation method and application of the coating, and belongs to the field of functional coating materials. The wear-resistant weather-resistant super-amphiphobic coating comprises modified nano particles, epoxy resin and a curing agent, and the modified nano particles are obtained by performing fluorination modification on nano particles by using long-chain perfluorosilane and then performing grafting reaction by using ammonia siloxane. Furthermore, the wear-resistant and weather-resistant super-amphiphobic coating is prepared from the wear-resistant and weather-resistant super-amphiphobic coating, so that the prepared wear-resistant and weather-resistant super-amphiphobic coating realizes the amphiphobic function of water and glycerol and has certain wear resistance and weather resistance.