655 results about "Graft reaction" patented technology

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 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 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 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 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 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 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 delayed coagulation type super-early-strength quick-hardening mortar and a preparation method thereof, and relates to the technical field of building materials, a shell-core structure targeted modified early strength agent is designed, a staged dry-wet mixing technology is adopted, seabed in-situ curing is combined, cooperation of mortar delayed coagulation construction and super-early-strength development is achieved, and the construction efficiency is improved. According to the present invention, with the design of the targeted modified early strength agent, the surface delayed coagulation shell and the core early strength core structure are formed through the grafting reaction of the sodium nitrite and the hydroxyl carboxylic acid monomer, and the 15-25% accurate grafting rate control is matched, such that the antagonism problem of the traditional early strength agent and the delayed coagulation agent can be solved, and the deep sea open caisson grouting temporary support requirement can be met; in the deep sea environment, the delayed coagulation shell can guarantee a construction window of 75-105 min, the requirement for long-distance grouting of the seabed is met, deep sea high pressure can trigger the delayed coagulation shell to be broken, the core early strength core rapidly activates cement to be hydrated, and the mortar can rapidly form the requirement for rapid bearing of the open caisson temporary support with enough strength.

The invention discloses a preparation method of an ether-containing side chain modified cation selective separation membrane, which comprises the following steps: by taking an own microporous polymer as a precursor for preparing a membrane material, realizing an ion exchange function of the membrane material through grafting a sulfonated monomer; on the basis, the transmission difference of different ions in the membrane is further realized through grafting of ether-bond-containing micromolecular monomers, the ion selectivity is constructed, and the prepared membrane material has the ion separation performance superior to that of a current commercial cation selective separation membrane. The industrial production difficulty is remarkably reduced by the membrane synthesis preparation route of the solution grafting reaction, the large-scale production is easy to realize, and the prepared membrane material can reach the ion flux of industrial-grade electrodialysis and is expected to realize large-scale application.

The invention relates to the technical field of marine coatings, in particular to a high-performance marine coating based on basalt fiber scales and a preparation method of the high-performance marine coating. The high-performance marine coating comprises the following raw materials in parts by weight: 60-80 parts of waterborne epoxy resin, 50-60 parts of water, 20-30 parts of filler, 3-5 parts of a curing agent, 2-4 parts of toner, 0.8-1.2 parts of a flatting agent and 0.8-1.2 parts of a defoaming agent. In the preparation of the marine coating, the filler is added, after the ox horn powder is treated, amino groups of collagen of the ox horn powder are subjected to a free radical grafting reaction to form polyvinyl ester branched chains, and the effect of increasing surface polar groups is achieved, so that hydrogen bond combination with hydroxyl groups of epoxy resin can be formed, and the corrosion resistance of the marine coating is improved. And the coating can be matched with methyl methacrylate to form a coating layer, so that a three-dimensional network structure is formed, the toughness of the coating is effectively improved, and the wear resistance of the marine coating is further improved.

The invention discloses a formaldehyde-free composite board for a cabinet and a preparation method of the formaldehyde-free composite board, and relates to the technical field of artificial board manufacturing. The preparation method of the formaldehyde-free composite board for the cabinet comprises the following steps: mixing high amylose with a choline chloride / urea deep eutectic solution, stirring, adding concentrated hydrochloric acid for reaction, adjusting the pH value, and adding ammonium persulfate to obtain pretreated oxidized starch; methacrylic acid dehydrated glyceride is added into the pretreated oxidized starch for a grafting reaction, then modified polyvinyl alcohol is added for blending, sodium metaphosphate is added for crosslinking, finally, heating and curing are conducted, modified titanium dioxide nanoparticles are added, and the formaldehyde-free starch adhesive is obtained. The wood shavings and the formaldehyde-free starch adhesive are mixed, and a core material is obtained; and arranging the core material between the formaldehyde-free veneers, and carrying out hot press molding to obtain the formaldehyde-free composite board. The formaldehyde-free composite board for the cabinet has excellent mechanical strength, bonding performance and water resistance.

The invention provides a vinyl cyclosiloxane grafted ethylene-vinyl acetate copolymer and a preparation method thereof. The vinyl cyclosiloxane grafted ethylene-vinyl acetate copolymer is as shown in (I): # imgabs0 # R is methyl; r1 is vinyl or methyl; x is an integer of 2-5. The vinyl cyclosiloxane grafted ethylene-vinyl acetate copolymer provided by the invention has better thermal stability and stretchability, and has potential application value in the aspect of improving the heat resistance, mechanical strength and other properties of various packaging adhesive films. According to the preparation method, the ethylene-vinyl acetate copolymer is obtained in one step through the lateral radical grafting reaction of the ethylene-vinyl acetate copolymer under the condition of less solvent or in a molten state, the preparation method is simple in process, can be carried out in the presence of a small amount of organic solvent or under the melting condition, and is relatively low in cost, relatively few in by-products and relatively high in practicability.

The invention discloses a preparation method of photo-thermal anti-icing / deicing slurry, the photo-thermal anti-icing / deicing slurry and application. The preparation method comprises the following steps: in the presence of a basic catalyst, mixing an aqueous dispersion of nanocellulose with a polymer-based photo-thermal material monomer for reaction to obtain a first mixed solution; and mixing the first mixed solution with a water repellent agent solution, carrying out a grafting reaction, and carrying out centrifugal washing to obtain the photo-thermal anti-icing / deicing slurry. After the slurry prepared by the method is used for forming a coating, the problem that an anti-freezing surface is difficult to maintain an anti-freezing state in a long-time use state or a low-temperature and high-humidity environment can be well solved, and in addition, the coating can realize anti-icing and deicing, water and water proofing, thermal management, ultraviolet radiation prevention, photo-thermal sterilization, oil-water separation and the like of a solid surface.

The invention provides a polyglutamic acid granular fertilizer and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving lignin in an alkaline solution, and heating until the lignin is dissolved; adding epsilon-polylysine fermentation liquor, mixing, heating, adding a formaldehyde solution, and carrying out grafting reaction to obtain epsilon-polylysine grafted lignin; s2, mixing the epsilon-polylysine grafted lignin solution and the gamma-polyglutamic acid solution, adding N-hydroxysuccinimide, standing at a low temperature, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and mixing; carrying out gradient temperature reaction to obtain lignin grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel; and S3, homogenizing the lignin-grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel, carrying out normal-temperature high-pressure airflow crushing, and spraying the crushed hydrogel to the surfaces of particles obtained by granulating a basic material through high-pressure electrostatic spraying, so as to obtain the polyglutamic acid granular fertilizer. The obtained polyglutamic acid granular fertilizer has relatively strong water-retaining and slow-release (releasing water, urea and the like) effects.

The invention discloses a power battery insulation pressure-sensitive adhesive and a preparation method thereof, and belongs to the technical field of high-molecular polymer materials, the power battery insulation pressure-sensitive adhesive comprises an insulation base material, a fluorine grafting agent, a phosphorus grafting agent, silicon-based resin, a cross-linking agent and a platinum catalyst, the preparation method comprises the following steps: S1, fluorine side chain grafting; s2, phosphorus side chain grafting; s3, dispersing the silicon-based resin; s4, carrying out a cross-linking reaction; and S5, impurity removal and purification. Through a fluorine-phosphorus side chain grafting reaction, the balance of initial viscosity and persistent viscosity of a system is optimized, a synergistic protection system is constructed, a fluorine element forms a compact permeation barrier, a phosphorus element provides an efficient char forming flame retardant site, and an insulating framework of PHMS and a cross-linked network of PHS are matched, so that the flame retardant performance of the composite material is improved. The problems of insufficient insulation stability, unbalanced initial viscosity and persistent viscosity and poor flame retardance caused by lack of targeted function modification in the prior art are solved, and the pressure-sensitive adhesive has the potential of being applied to preparation of a power battery pressure-sensitive adhesive.

The invention belongs to the technical field of rainwater treatment, and relates to a multifunctional bioretention pond for enhancing nitrogen and phosphorus removal, a water accumulation layer, a covering layer, a planting layer, a medium layer, a submerging layer and a drainage layer are sequentially distributed in the pond from top to bottom, the drainage layer is provided with a drainage pipe, and a water outlet of the drainage pipe is flush with the top of the submerging layer; the submerged layer contains modified wood chips and scrap iron which are filled in a layered manner, the modified wood chips are obtained by grafting reaction of wood chips through a functional copolymer, and the use amount of the functional copolymer is 6-10 wt% of the wood chips; the functional copolymer is obtained by carrying out a copolymerization reaction on a pyridyl-containing acrylic acid monomer and a double-bond-containing acyl halide monomer according to a molar ratio of 1: (0.1-0.3). Through wood chip modification and filling structure improvement, a submerged layer of the bioretention pond is filled with modified wood chips and scrap iron in a layered manner, so that the bioretention pond has the effect of enhancing nitrogen and phosphorus removal, and meanwhile, the removal effect on heavy metal pollutants is also greatly improved.

The invention belongs to the field of spinning, and particularly relates to a preparation method of a high-breathability fabric, which mainly comprises the following steps: S1, plasma treatment: putting a polyester fabric into plasma treatment equipment, and carrying out plasma treatment by using a mixed gas of argon and oxygen under the condition that the vacuum degree is 10-50Pa; s2, surface grafting modification: taking the polyester fabric subjected to plasma treatment, adding the polyester fabric into a modification solvent composed of triallyl isocyanurate, vinyl acetate, azodiisobutyronitrile and n-heptane for grafting reaction, alternately cleaning the polyester fabric with an organic solvent and deionized water for 3-5 times, and drying the polyester fabric to realize surface grafting of the polyester fabric; s3, preparing hydroxyl groups on the surfaces of the fibers, namely treating the polyester fabric subjected to surface grafting in a hydrolytic agent, and then performing post-treatment on the polyester fabric to obtain the high-air-permeability fabric. According to the invention, hydrophilic modification treatment is carried out on the polyester fabric, so that the fabric can be endowed with certain moisture absorption and air permeability and certain washing resistance at the same time.