556 results about "Graft reaction" patented technology

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 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 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 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 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 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 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 provides a water treatment membrane and a preparation method and application thereof, and the preparation method comprises the following steps: (1) treating a carbon nanotube with an acidic solution to obtain an acidified carbon nanotube; (2) polymerizing N-vinylpyrrolidone, an acrylic acid compound, an RAFT reagent and the acidified carbon nano tube to obtain a modified carbon nano tube; (3) carrying out grafting reaction on maleic anhydride and polyvinylidene fluoride to obtain modified polyvinylidene fluoride; and (4) polymerizing the modified polyvinylidene fluoride, the modified carbon nanotubes and polyvinylpyrrolidone to obtain the water treatment membrane. Carbon nanotubes and polyvinylidene fluoride are modified and then polymerized with polyvinylpyrrolidone, so that the carbon nanotubes are orderly and firmly fixed on the modified polyvinylidene fluoride, the surfaces of the carbon nanotubes are coated with polyvinylpyrrolidone molecules with strong hydrophilicity, and the high-flux water treatment membrane is obtained.

The invention discloses a preparation method and application of a modified glass fiber reinforced polypropylene composite material, and belongs to the field of high polymer materials. The modified glass fiber reinforced polypropylene composite material comprises the following raw materials in parts by weight: 33-76 parts of polypropylene resin; 20 to 50 parts of modified glass fiber; 2 to 8 parts of POE resin; 2-5 parts of a styrene thermoplastic elastomer maleic anhydride graft; the preparation method of the modified glass fiber comprises the following steps: dissolving a coupling agent containing double bonds in a solvent, adding glass fiber, taking out and drying to obtain glass fiber with double-bond functional groups on the surface; and adding the glass fiber containing the double-bond functional group on the surface, maleic anhydride, ethoxyamide wax and an initiator into a reaction kettle for grafting reaction, taking out after the reaction is finished, and drying to obtain the surface-coated modified glass fiber.

The invention discloses an aqueous dispersant based on styrene maleic anhydride and a preparation method thereof, and belongs to the technical field of auxiliary chemicals. In order to solve the problems of weak anchoring force, insufficient viscosity reduction and environmental sensitivity of a traditional SMA dispersing agent, an amphiphilic block (a hydrophilic polyethylene glycol chain segment and a hydrophobic aliphatic / aromatic chain segment) is grafted on an SMA main chain to form a comb-shaped copolymer structure, and the steric hindrance effect and the interface anchoring capacity are synergistically enhanced. According to the design, the wetting dispersity of organic / inorganic pigments and fillers is remarkably improved, the viscosity of a high-solid-content system is greatly reduced, and meanwhile, excellent stability is kept under the conditions of pH fluctuation and high shear. A one-step condensation process is adopted for preparation, a grafting reaction is completed in an anhydrous solvent, and the water-soluble dispersant is directly obtained through neutralization. The viscosity reduction bottleneck of a traditional dispersant is broken through, the production process is simplified, the dispersion efficiency and the system environment adaptability are improved, and the dispersant is suitable for high-solid-content water-based systems in the fields of coatings, printing ink and the like.

The invention discloses an anti-ultraviolet functional plastic particle and a preparation method thereof, and belongs to the technical field of polymer modified materials. The plastic particles are prepared from polyolefin resin subjected to organic silicon-phenolic hydroxyl synergistic grafting modification, 2, 4-dihydroxyacetophenone, an antioxidant, a hindered amine light stabilizer, a lubrication dispersant and an anti-yellowing agent. A siloxane-phenolic hydroxyl bifunctional chain segment is introduced into the surface of a molecular chain of the polyolefin resin subjected to organic silicon-phenolic hydroxyl synergistic grafting modification, so that a flexible-rigid synergistic interface layer is formed; the 2, 4-dihydroxyacetophenone has a hydroxyl and carbonyl conjugated structure and can form hydrogen bond complexation with a matrix, so that free radical degradation is effectively inhibited. The preparation method disclosed by the invention comprises the following three steps: grafting reaction of polyolefin resin subjected to organic silicon-phenolic hydroxyl synergistic grafting modification, high-speed mixing and melt blending granulation. Tests show that after the plastic particles are subjected to 365nm ultraviolet radiation for 500h, the tensile strength retention rate exceeds 94%, the chromatic aberration delta E is less than or equal to 1.5, the oxidation induction time is prolonged to 55min, and the plastic particles have excellent ultraviolet aging resistance, yellowing resistance and thermal oxidation stability.

The invention provides maleic anhydride grafted polyethylene and a preparation method thereof, and relates to the technical field of high polymer materials. The maleic anhydride grafted polyethylene is prepared from the following raw materials in parts by weight: 100 parts of polyethylene resin, 0.1 to 2 parts of maleic anhydride, 0.01 to 0.5 part of a free radical initiator, 0.01 to 0.5 part of an antioxidant, 0.1 to 2 parts of a third monomer, 0.01 to 0.5 part of a stabilizer and 0.01 to 0.5 part of a crosslinking modifier, in the preparation process of the maleic anhydride grafted polyethylene, the stabilizer and the cross-linking modifier are added, so that the cross-linking reaction is prevented, the stability of the grafting reaction is controlled, the maleic anhydride grafted polyethylene with high grafting rate and good flow processability is obtained, and the practical application of the compatilizer in different scenes is met.

The present invention relates to a water-resistant, high-capacity carbon dioxide adsorption and capture material, its preparation method, and application, and belongs to the technical field of synthesis and application of organic functional materials. The present invention provides a method for preparing the material, which uses Merrifield resin as an active carrier and a monoacylated polyamine as a grafting reagent, and adopts a method of grafting the monoacylated polyamine on the active carrier, hydrolyzing and removing the acyl group, and washing and drying to obtain a finished material. This strategy can effectively inhibit the situation where a polyamine molecule occupies multiple reaction sites on the carrier during the grafting reaction, increase the polyamine loading on the material, and thus increase the carbon dioxide adsorption capacity of the material. The saturated adsorption capacity of the obtained material is above 3.8 mmol / g, and it has high nitrogen efficiency, excellent water resistance and cyclic stability.

The invention discloses a supercapacitor with a high specific surface area and a preparation method thereof, and relates to the technical field of supercapacitors. Comprising the following steps: performing layer-by-layer cladding forming on TC4 alloy powder to obtain a three-dimensional bionic curved surface structure with Gyandroid topology in a three-period minimal curved surface, and forming a randomly distributed microcosmic columnar bulge structure on the surface of the three-dimensional bionic curved surface structure as a metal current collector; polyaniline is continuously deposited to form a film along the three-dimensional bionic curved surface structure and the surface microcosmic columnar protrusion structure of the three-dimensional bionic curved surface structure in a pulse electrodeposition mode, and a TC4-coated PANI electrode is obtained; the preparation method comprises the following steps: preparing a three-dimensional bionic curved surface structure, performing grafting reaction on polyvinyl alcohol and an epoxy compound containing a quaternary ammonium group under an alkaline condition to prepare a PVA-g-TMAC polymer, preparing a PVA-g-TMAC hydrogel electrolyte, injecting the PVA-g-TMAC hydrogel electrolyte into a mold, arranging two TC4-coated PANI electrodes in the mold according to a preset interval, clamping the three-dimensional bionic curved surface structure, and performing freeze thawing and consolidation to obtain the supercapacitor with a sandwich structure.

The invention discloses a high-temperature-resistant low-friction-coefficient low-abrasion sealing material and a preparation method thereof, and belongs to the technical field of sealing materials. The sealing material is prepared from the following raw materials in parts by mass: 60 to 80 parts of hydrogenated butadiene-acrylonitrile rubber, 20 to 40 parts of hydrogenated carboxyl butadiene-acrylonitrile rubber, 40 to 50 parts of carbon black N234, 4 to 6 parts of modified carbon fiber, 2 to 4 parts of modified hexagonal boron nitride, 3 to 5 parts of liquid polybutadiene, 3 to 4 parts of composite vulcanizing agent, 2 to 3 parts of zinc oxide, 1 to 2 parts of rubber anti-aging agent 445, 1 to 2 parts of anti-aging agent MB, 0.2 to 0.5 part of accelerant BZ and 0.5 to 2 parts of stearic acid. The modified carbon fiber is obtained by growing molybdenum disulfide on the surface of carbon fiber in situ and performing amination modification, the modified hexagonal boron nitride is obtained by performing grafting reaction on hydroxylated hexagonal boron nitride and an epoxy silane coupling agent, and the sealing material provided by the invention has high wear resistance and high temperature resistance.

The invention discloses a preparation method and application of a hydrophobic air filtering material based on lignin modification, and belongs to the technical field of personal protective articles. According to the method, environment-friendly lignin and a silane coupling agent are subjected to a pre-grafting reaction to prepare a functionalized impregnation liquid, a mask melt-blown cloth filter material is modified, and the modified mask melt-blown cloth filter material serves as a long-acting hydrophobic mask filter material to prepare a mask. According to the invention, a firm hydrophobic network is constructed on the surface of the fiber by utilizing the'molecular bridge 'effect of silane. The modified filter material prevents the filter efficiency from being reduced due to moisture, and meanwhile, the coating is resistant to airflow scouring through chemical bonding, so that the protective life of the mask is prolonged. Compared with a reported modification method, the preparation method disclosed by the invention has the comprehensive advantages of environmental friendliness, low cost and lasting performance.

The invention discloses a wear-resistant anti-icing easy-to-deice coating for power equipment and a preparation method thereof, and relates to the technical field of coatings. The wear-resistant anti-icing easy-to-deice coating for the electrical equipment is prepared from the following raw material components in parts by weight: 40 to 60 parts of water-based fluorocarbon resin dispersion, 5 to 15 parts of perfluorosilane surface modified filler, 3 to 10 parts of light-absorbing heating material, 0.5 to 2 parts of wetting dispersant, 0.2 to 0.6 part of defoaming agent, 0.2 to 1 part of flatting agent, 0.5 to 1 part of anti-aging agent, 15 to 25 parts of deionized water and 12 to 20 parts of water-based isocyanate curing agent. The perfluorosilane surface modified filler is obtained by modifying a filler with a perfluorosilane coupling agent; the light-absorbing heating material is a Fe3O4 / C composite material or a product obtained by further modifying the Fe3O4 / C composite material through a vinyl silane coupling agent and then reacting and grafting with amino-terminated hyperbranched polyamide.

The invention relates to the technical field of oil field reservoir damage inhibition, in particular to a carbon quantum dot biological composite material and a preparation method and application thereof. The preparation method of the carbon quantum dot biological composite material provided by the invention comprises the following steps: mixing a scenedesmus extracting solution with an aqueous dispersion of carbon quantum dots, then adjusting the pH value to 8-10, and carrying out a grafting reaction to obtain the carbon quantum dot biological composite material, the scenedesmus extracting solution is a mixed solution of intracellular substances released after scenedesmus cells are broken and water. The carbon quantum dot biological composite material prepared by the method can be used as an asphaltene deposition inhibitor, has the characteristics of greenness, high efficiency and low cost, and can effectively inhibit asphaltene deposition, so that the fluidity of crude oil is improved, reservoir damage is reduced, and the production cost is reduced.