245 results about "Vinylsilane" patented technology

The invention relates to the technical field of cable coating materials, and particularly discloses a B1-grade cable material as well as a preparation method and application thereof. The cable material provided by the invention comprises matrix resin, a compatilizer, a flame retardant, a lubricant, an antioxidant, a smoke suppression charring agent, nano silicon dioxide and a silane coupling agent, the matrix resin is a mixture of linear low density polyethylene resin, an ethylene-octylene copolymer, metallocene polyethylene and an ethylene-vinyl acetate copolymer; the flame retardant is a mixture of magnesium hydroxide, aluminum hydroxide and hydrotalcite; the smoke suppression charring agent is a mixture of hydrous magnesium silicate and modified montmorillonite; the silane coupling agent is a mixture of vinyl silane and diamino silane. According to the cable material provided by the invention, the specific matrix resin, the flame retardant, the smoke suppression charring agent and the silane coupling agent are combined with auxiliaries such as the compatilizer, the lubricant, the antioxidant and the nano silicon dioxide to serve as raw materials, so that the flame-retardant effect of the B1-grade cable material is greatly improved.

The invention relates to the technical field of formaldehyde adsorption, in particular to a preparation method of modified activated carbon for removing formaldehyde, which comprises the following steps: S1, performing acidification pretreatment on coconut shell charcoal, and grafting the pretreated coconut shell charcoal with polyethyleneimine to obtain activated carbon loaded with polyethyleneimine; s2, carrying out dipping treatment and cyclohexanol treatment on the activated carbon loaded with polyethyleneimine to obtain functionalized activated carbon; s3, reacting the magnesium-aluminum hydrotalcite with a quaternary ammonium salt solution and a sodium benzenesulfonate solution to obtain modified hydrotalcite; reacting the modified hydrotalcite with a vinyl silane coupling agent to obtain vinyl hydrotalcite; s4, the vinyl hydrotalcite and 4-amino-3-hydrazino-5-sulfydryl-triazole are subjected to a reaction, and secondary modified hydrotalcite is obtained; and S5, dispersing the secondary modified hydrotalcite and the functionalized activated carbon in water, and adding glutaraldehyde to obtain the modified activated carbon. The modified activated carbon prepared by the preparation method disclosed by the invention realizes selective recognition, efficient adsorption and catalytic degradation of formaldehyde.

The invention belongs to the technical field of low-temperature HIB steel, and particularly relates to modified magnesium oxide and a preparation method and application thereof. The modified magnesium oxide provided by the invention comprises a magnesium oxide matrix as well as calcium oxide and vinyl silane which are adsorbed on the surface of the magnesium oxide matrix, the 40% CAA of the magnesium oxide matrix is 60-70 s, and the 70% CAA of the magnesium oxide matrix is 125-145 s. Calcium oxide is introduced into silicon steel grade magnesium oxide, so that the alkalinity of modified magnesium oxide is further improved; under the combined action of calcium oxide and vinyl silane, the reaction activity of modified magnesium oxide and silicon dioxide on the surface of a silicon steel sheet is improved, 70% CAA seconds are reduced under the condition that 40% CAA activity seconds are not changed, the synthesis capacity of a magnesium silicate bottom layer is improved, and the uniformity and surface quality of the magnesium silicate bottom layer synthesized by low-temperature HIB steel are improved; therefore, the properties of iron loss and magnetic induction intensity of the low-temperature HIB steel are ensured.

The present application relates to the technical field of aluminum electrolytic capacitors, and specifically discloses a low-temperature, medium- and high-voltage aluminum electrolytic capacitor. Among them, the electrolyte of the low-temperature, medium- and high-voltage aluminum electrolytic capacitor includes the following raw materials: a main solvent, a low-melting point co-solvent, a main solute, an auxiliary solute, a flash voltage enhancer, a hydrogen remover, and a waterproofing auxiliary agent. Among them, the flash voltage enhancer is modified nano-silica. The present invention uses a vinyl silane coupling agent to modify the surface of nano-silica, and then esterifies polyvinyl alcohol and allyl succinic anhydride to form allyl succinic anhydride-grafted polyvinyl alcohol, and effectively combines it with silanized nano-silica, so that the nano-silica particles can be evenly dispersed in the electrolyte to increase the flash voltage of the electrolyte, and by introducing a low-melting point co-solvent, the melting point of the electrolyte system can be effectively reduced, so that the capacitor can maintain low viscosity and good electrical properties in a low-temperature environment.

The invention relates to a self-crosslinking flame-retardant insulating material and a preparation method thereof, and belongs to the technical field of insulating material preparation. The self-crosslinking flame-retardant insulating material comprises the following raw materials: polyethylene, modified vinyl silane, an epoxy flame retardant, a water producing agent, a catalyst and an initiator, the modified vinyl silane is prepared from a ring-opening reaction product and a diamine compound through a condensation reaction; the ring-opening reaction product is prepared from an epoxy silane coupling agent and a 2, 2-dimethylolpropionic acid derivative through a reaction; the 2, 2-dimethylolpropionic acid derivative is prepared from 2, 2-dimethylolpropionic acid and acrylic acid through esterification reaction; the epoxy flame retardant is prepared from a hydroxyl-terminated dendritic compound and an epoxidation agent through an epoxidation reaction; the hydroxyl-terminated dendritic compound is prepared from hexachlorocyclotriphosphazene and alkyl binary primary alcohol through a substitution reaction. By introducing the modified vinyl silane and the epoxy flame retardant, a bi-crosslinking interpenetrating network is formed in the obtained material, so that the problems in the background technology are solved.

The invention discloses UV glue for a holographic IMR diaphragm and the holographic diaphragm prepared from the UV glue. The UV glue is prepared from the following raw materials: vinyl silane, polyester acrylate, aliphatic polyurethane acrylate, trifunctional sulfydryl modified acrylate, a bifunctional active monomer, a trifunctional active monomer and a photoinitiator. The bifunctional active monomer comprises one or more of dipropylene glycol diacrylate, tripropylene glycol diacrylate and triethylene glycol diacrylate. And the trifunctional active monomer is trimethylolpropane triacrylate or pentaerythritol triacrylate. A silicon-oxygen bond in the added vinyl silane has hydrophilicity and can be subjected to a hydrolysis reaction with water molecules in air in a high-temperature and high-humidity environment to generate a Si-OH intermediate, and then the Si-OH intermediate and the silicon-oxygen bond are condensed to form a Si-O-Si bond, so that the compactness of a cross-linked network is further enhanced; and the light-cured coating has excellent water resistance and temperature resistance.

The invention relates to the technical field of regenerated polyethylene materials, and particularly discloses a high-flame-retardant regenerated polyethylene plastic and a preparation process thereof. Comprising the following steps: S1, taking maleic anhydride polyamidoamine, adding water and ethanol, uniformly stirring, adding 1-octene, a vinyl silane coupling agent and benzoyl peroxide, stirring for reaction, and removing a solvent to obtain a modifier; s2, adding carbon black into water and ethanol, uniformly stirring, heating, adding a modifier, and performing reflux reaction to obtain modified carbon black; s3, adding double-bond phosphate and sulfydryl modified benzene diboron into tetrahydrofuran, uniformly stirring, adding high-density polyethylene and a photoinitiator, mixing, carrying out ultraviolet irradiation, filtering, taking a solid, and drying, so as to obtain modified polyethylene; s4, taking regenerated high-density polyethylene, polypropylene, modified polyethylene, calcium stearate, modified carbon black, an antioxidant, a diisocyanate cross-linking agent, dicumyl peroxide and toner, uniformly stirring, and performing melt extrusion to obtain the high-flame-retardant regenerated polyethylene plastic.

The invention relates to the technical field of chemical grouting materials, in particular to a preparation method suitable for nano-silica sol grouting under a high-temperature condition, and aims to solve the problems that an existing grouting material cannot be used at a high temperature, and the gel strength is low and the gel rate is uncontrollable when single silica sol is used at the high temperature. The invention provides a preparation method suitable for nano-silica sol grouting under a high-temperature condition, which comprises the following steps: step 1, carrying out surface modification on small-particle-size spherical nano-silica sol by using vinyl silane to graft carbon-carbon double bonds on the surface of the nano-silica sol to obtain modified nano-silica sol; step 2, adding a water-soluble vinyl monomer and an initiator into the modified nano silicon dioxide sol; and step 3, adding a proper amount of a gel accelerator, and enabling the system to be in an environment of 70-120 DEG C, so as to obtain the high-strength grouting material with controllable gelation time.

The invention belongs to the technical field of fabrics, and particularly relates to a graphene-based wear-resistant outdoor jacket fabric and a preparation method thereof. The graphene-based wear-resistant outdoor jacket fabric comprises base cloth and a wear-resistant layer on the surface of the base cloth, the base cloth comprises graphene polyamide fibers and polyester fibers; the wear-resistant layer comprises the following raw materials in parts by weight: 3-8 parts of a vinyl silane coupling agent modified wear-resistant agent, 1-4 parts of vinyl POSS, 1-5 parts of an emulsifier, 0.1-0.5 part of a photoinitiator and 100 parts of water; the wear-resistant agent comprises fluorinated graphene and cubic boron nitride. The wear-resistant outdoor jacket fabric provided by the invention has excellent wear resistance, water resistance and soaping resistance.

The invention discloses a powder treating agent, two-component heat-conducting gel as well as a preparation method and application of the two-component heat-conducting gel. The powder treating agent is prepared by sequentially carrying out hydrosilylation reaction on D4H cyclotetrasiloxane, vinyl silane, olefin and phenyl vinyl silicone oil. Wherein the structural formula of the vinyl silane is Vi-Si-(OR1) 3, and OR1 is a methoxy group, an ethyoxyl group, a formyloxy group or an acetoxyl group; the structural formula of the olefin is # imgabs0 # 20 > = q > = 8; and Vi is vinyl. According to the powder treating agent disclosed by the invention, a polysiloxane polymer and a phenyl group are introduced, so that the powder treating agent has excellent temperature resistance, is not degraded and volatilized under the condition of long-time high-temperature aging, ensures that hardness and thermal resistance are not obviously increased and has excellent thermal stability, and when the powder treating agent is used in heat-conducting gel, the thermal stability of the heat-conducting gel is effectively improved, and the service life of the heat-conducting gel is prolonged. And the service life and the period of the electronic component are prolonged.

The invention relates to the technical field of waste asphalt regeneration, and particularly discloses nano microgel, a preparation method thereof and application of the nano microgel in repairing aged SBS modified asphalt. The nano microgel is prepared from the following raw materials in parts by weight: 33 to 44 parts of acrylic acid soft monomer, 3 to 4 parts of cross-linking agent, 1 to 2 parts of vinyl silane coupling agent, 1 to 2 parts of multifunctional epoxy monomer, 0.1 to 0.2 part of initiator, 0.3 to 0.5 part of terminating agent and 40 to 50 parts of solvent. The nano microgel provided by the invention can achieve a better repairing effect on the aged SBS modified asphalt in a conventional hot mixing mode or under a normal temperature condition, so that the regenerated SBS modified asphalt can achieve the initial pavement performance.

The invention relates to the technical field of preparation of cross-linking agents for rubber, in particular to a cross-linking agent, a preparation method of the cross-linking agent and application of the cross-linking agent in rubber preparation. The cross-linking agent is prepared through multi-stage structural design and functional modification and comprises the following steps: firstly, synthesizing a porous carrier by a template method, loading a divinyl benzene cross-linking agent after vinyl silane alkenylation modification, forming inner-layer packaging through Fe < 3 + >-tannic acid coordination, and performing surface functional modification by adopting 1, 9-decadiene to obtain the cross-linking agent. And finally, performing outer layer physical coating through low-melting-point paraffin. The cross-linking agent has a unique dual-threshold gating release characteristic, the outer paraffin provides physical protection at a mixing temperature, the inner coordination network is controllably dissociated at a vulcanization temperature, and on-demand release of cross-linking active components is realized. When the cross-linking agent is applied to rubber preparation, the uniformity of a cross-linking network can be remarkably improved, the cross-linking efficiency is improved, and the problems that a traditional cross-linking agent is easy to consume in advance, uneven in distribution and the like are solved.

The invention discloses a high-toughness conjoined rubber tube and a production process thereof, and belongs to the technical field of rubber tubes. The high-toughness connected rubber tube comprises the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer, 8-15 parts of phenyl silicone rubber, 20-25 parts of filler, 6-10 parts of modified hydroxyl-terminated polysilsesquioxane, 2-5 parts of a vulcanizing agent, 1-3 parts of a vulcanization accelerator, 3-5 parts of a vinyl silane coupling agent and 1.5-3.5 parts of an antioxidant, wherein a polycarbonate chain segment is grafted on a molecular chain of the modified hydroxyl-terminated polysilsesquioxane. Blending of the phenyl silicone rubber and the ethylene propylene diene monomer can help to effectively transfer stress, resist external force, improve the toughness of the connected rubber tube and make up for the problem of poor wear resistance of the ethylene propylene diene monomer. The introduction of the polycarbonate chain segment can improve the compatibility of the components, form an interpenetrating network structure, enhance the toughness and other mechanical properties of the material, and can recover as soon as possible under the action of external force, thereby prolonging the service life of the rubber tube.

The invention relates to the field of composite materials, and particularly discloses a bio-based silica gel material and a preparation method thereof.The preparation method comprises the following steps that S1, an alkylated castor oil derivative is prepared, specifically, castor oil and maleic anhydride serve as raw materials to react to generate castor oil-based polycarboxylic acid ester containing double bonds, then mixing and reacting with an amino silane coupling agent to prepare an alkylated castor oil derivative; s2, mixing the alkylated castor oil derivative prepared in the step S1 with vinyl silane, 4-hydroxy-3-methoxyphenylethylamine, hermetia illucens oil, a catalyst and a pretreatment filler, and carrying out a reaction to prepare a silane group; s3, hydrolytic polycondensation: adding water into the silane group prepared in the step S2, hydrolyzing under an acidic condition to generate a colloidal silica, and drying to obtain a silica gel material; the invention further discloses the bio-based silica gel material prepared by adopting the preparation method. The bio-based silica gel material has the characteristic of preparing the bio-based silica gel material with higher mechanical property and heat resistance.

The invention relates to the technical field of wire and cable insulating materials, and provides a room-temperature self-crosslinking flame-retardant insulating material and a preparation method thereof.The preparation method comprises the steps that a magnetic metal hydroxide flame retardant is prepared through a sol-gel method, and modified vinyl silane is prepared through a ring-opening polymerization reaction; the preparation method comprises the following steps: performing ordered grafting granulation on polyolefin resin, a magnetic metal hydroxide flame retardant and modified vinyl silane to prepare matrix granules; and blending the matrix granules with the catalytic granules, carrying out extrusion molding on the blended granules, and standing at room temperature to obtain the room-temperature self-crosslinking flame-retardant insulating material. According to the room-temperature self-crosslinking flame-retardant insulated cable and the preparation method thereof, the flame retardant property can be improved, the crosslinking efficiency and cost can be optimized, and the mechanical property and the insulating property can be optimized.

The invention relates to the field of adsorption materials, and discloses a lithium ion adsorbent and a preparation method and application thereof. The lithium ion adsorbent comprises a polyvinyl chloride molecular chain and a polymer molecular chain A, wherein the polymeric molecular chain A comprises a structural unit I from crown ether containing vinyl and a structural unit II from a vinyl silane modified lithium ion sieve. The vinyl silane modified lithium ion sieve in the lithium ion adsorbent can be connected with a polymer molecular chain through a chemical bond, so that the lithium ion sieve can be uniformly dispersed on a polymer skeleton, and the lithium ion adsorbent has excellent structural stability, high adsorption capacity and high magnesium-lithium selectivity; and the solution loss rate of the lithium ion sieve is obviously reduced.

The present invention relates to the field of new material technologies, and discloses a flame-retardant fabric, a preparation method thereof and an application thereof. The method includes: (1) performing a first contact reaction on diethylenetriamine, vinylsilane and epoxy group-containing silane to obtain diethylenetriamine-silane; (2) performing a first dilution of the diethylenetriamine-silane in solvent I, adjusting the pH to obtain a diethylenetriamine-silane solution, immersing the fabric in the diethylenetriamine-silane to perform a first immersion to obtain a flame-retardant treated fabric I; (3) performing a second contact reaction on tetrakis(hydroxymethyl)phosphonium sulfate, urea and water to obtain a pre-polymerized tetrakis(hydroxymethyl)phosphonium sulfate flame retardant; (4) immersing the flame-retardant treated fabric I in the pre-polymerized tetrakis(hydroxymethyl)phosphonium sulfate flame retardant to perform a second immersion to obtain a flame-retardant fabric. The flame-retardant fabric prepared by the method provided by the present invention has excellent flame-retardant effect, the method is simple and efficient, and there is no need for gas to participate in the reaction, the cost is low, and it is suitable for mass production.

The invention provides a dispersing agent and a preparation method and application thereof, and belongs to the technical field of lithium batteries, the preparation method of the dispersing agent comprises the following steps: taking a first monomer, a second monomer, a chain transfer agent and an initiator as raw materials, and carrying out polymerization reaction at 45-75 DEG C to obtain the dispersing agent, wherein the first monomer comprises one or more of diethyl methyl vinyl silane, methyl vinyl bis (N-methyl acetamido) silane and 3-(dimethylamino) methyl acrylate, and the second monomer comprises one or more of methacrylic acid, 3-ethoxyacrylic acid and 2-hydroxy-2-methyl-3-butenoic acid. The dispersing agent prepared in the invention has strong adsorbability and strong dispersibility, and can improve the dispersibility of small particles in the preparation process of the lithium iron phosphate positive electrode material, so that the prepared lithium iron phosphate particles have no obvious adhesion, the particle size distribution interval is increased, and the compaction density and electrochemical performance of the lithium iron phosphate positive electrode material are improved.

The invention relates to the technical field of ink, and discloses polyurethane water-based ink and a preparation method thereof.The polyurethane water-based ink is obtained by adding water-based polyurethane resin, quaternary phosphonium salt modified imidazole, quaternized polyurethane, water-based pigment, a thickening agent, a flatting agent, a defoaming agent and deionized water into a stirrer and stirring. A quaternary phosphonium salt group and an imidazole group in the quaternary phosphonium salt modified imidazole have a relatively good antibacterial effect. A quaternary ammonium salt group in quaternized polyurethane also has a better antibacterial effect, and di (dimethylamino) methyl vinyl silane and 2-chloroethanol are subjected to quaternization reaction, so that the substitution degree of quaternary ammonium salt is improved, and the antibacterial effect of the quaternary ammonium salt is further improved; and the polyurethane structure also has relatively good wear resistance.

The invention relates to the technical field of high polymer materials, and discloses a low-smoke halogen-free irradiation crosslinking polyolefin cable sheath material and a granulation process thereof, the raw materials comprise an ethylene-vinyl acetate copolymer, an ethylene-octylene copolymer, an epoxy group-containing terpolymer and functionalized composite powder, the powder system superfine aluminum hydroxide is subjected to high-temperature grafting through vinyl silane, after cooling, an active coating layer is constructed by zinc methacrylate, active magnesium oxide and a lubricant, and the process adopts matrix resin main feeding, powder side feeding and low-temperature low-shear extrusion, and is subjected to air-cooled die surface hot cutting and electron beam irradiation crosslinking forming. The covalent bond and ionic bond synergistic enhancement mechanism is utilized, the contradiction between mechanical property loss and processing rheological property deterioration is solved under the high filling amount of 137-160 parts, the active components are effectively prevented from being scorched in the early stage, and the material is endowed with excellent tensile strength, elongation at break and surface quality.

The invention relates to the technical field of organic polymer films, and particularly discloses a polyolefin breathable microporous film and a preparation method thereof. The invention relates to a polyolefin breathable microporous film which is prepared by filling a polyolefin base material with a modified inorganic filler and carrying out casting extrusion, stretching and heat setting film forming processes, a preparation method of the modified inorganic filler comprises the following steps: stirring and mixing an inorganic filler, vinyl silane and water at 100-120 DEG C for 2-5 hours, filtering and drying to obtain the modified inorganic filler; the preparation method comprises the following steps: mixing the polyolefin base material and the modified inorganic filler, and performing extrusion granulation to obtain composite particles; the composite particles are subjected to extrusion melting, film casting, stretching and heat setting, and the polyolefin breathable microporous film is obtained. According to the polyolefin breathable microporous film, the vinyl silane modified inorganic filler is adopted, so that the compatibility of the polyolefin base material and the modified inorganic filler is improved, and the obtained film is uniform in overall appearance structure, high in white glossiness and excellent in ageing resistance and tearing resistance.

The invention belongs to the technical field of organic silicon coatings, and discloses an anti-aging organic silicon insulating waterproof coating as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out mixed reaction on a hydrogen-containing ring body and a vinyl silane coupling agent under the condition of a hydrosilylation catalyst to obtain a cyclosiloxane cross-linking agent; and uniformly mixing the obtained cyclosiloxane cross-linking agent with alpha, omega-dihydroxy polysiloxane, polydimethylsiloxane, a dialkoxy epoxy silane coupling agent, fumed silica, an antistatic agent, fluorine-containing silicon resin, a catalyst and solvent oil in a protective atmosphere to obtain the anti-aging organic silicon insulating waterproof coating. Compared with the conventional alkoxy silane cross-linking agent and ketoxime silane cross-linking agent, the specific cyclosiloxane cross-linking agent adopted by the invention can obviously improve the mechanical properties, weather resistance and storage stability of the obtained organic silicon coating.

The invention discloses a low-moisture and high-safety lithium battery diaphragm and a preparation method thereof.The low-moisture and high-safety lithium battery diaphragm comprises a base membrane and a coating on the base membrane, the coating comprises modified gamma-phase superfine porous aluminum oxide, the modified gamma-phase superfine porous aluminum oxide is obtained by modifying gamma-phase superfine porous aluminum oxide through a silane coupling agent, and the modified gamma-phase superfine porous aluminum oxide is prepared from modified gamma-phase superfine porous aluminum oxide. The silane coupling agent is one of a vinyl silane coupling agent and a methyl silane coupling agent. According to the invention, surface modification is carried out on gamma-phase superfine porous alumina by using a silane coupling agent with a hydrophobic group, so that the diaphragm has high ionic conductivity, good high temperature resistance and good liquid absorption and retention capability, and meanwhile, the water content of the diaphragm is reduced.

This application is applicable to the field of material technology, and provides a composite phase change material, a preparation method thereof, a potting material, and an electronic device; the composite phase change material has a phase change microcapsule as the inner layer, and carbon nanotubes and silicon dioxide are sequentially coated on the surface layer of the phase change microcapsule, and is obtained by modification with a vinyl silane coupling agent. This application can take into account high thermal conductivity and high enthalpy value, without the need to be used in combination with thermal conductive powders, and improves the flammability defect of conventional organic phase change materials when used alone; in addition, the potting material prepared from this composite phase change material can take into account excellent properties such as high enthalpy value, high thermal conductivity, high fluidity, insulation, and flame retardancy; and this composite phase change material has good compatibility with the silicone matrix, will not cause phase separation, and can prevent sedimentation; its surface contains vinyl groups, which can participate in the silicone addition reaction during curing, and after curing, the phase change material and the silicone matrix form a quasi-3D network structure, and the composite thermal conductive phase change filler is more closely combined with the silicone matrix.

The invention relates to the technical field of high polymer materials, in particular to high-barrier modified polyethylene which comprises high-density polyethylene, vinyl silane, montmorillonite, alkali, an antioxidant, nano silicon dioxide, a polyolefin grafted compound, a plasticizer and a stabilizer. According to the invention, additives such as vinyl silane, modified montmorillonite and the like are introduced into high-density polyethylene, and an irradiation crosslinking process is adopted, so that the gas barrier property and the mechanical property of polyethylene are remarkably improved; through surface modification of the montmorillonite, the compatibility of the montmorillonite and a polyethylene matrix is improved, so that the polyethylene matrix is more uniform in microstructure, and the barrier effect is effectively enhanced; by adopting an irradiation crosslinking technology, not only is the barrier property of polyethylene improved, but also the heat resistance and the mechanical strength of the polyethylene are enhanced, so that the material can keep stable performance in a harsh environment; compared with a traditional modification method, the method has the advantages that the production process is simplified, and the dependence on chemical additives is reduced.

The invention relates to a high-temperature-resistant silicone rubber sealing element and a preparation method thereof, and belongs to the technical field of sealing element materials. The high-temperature-resistant silicone rubber sealing element comprises the following components: vinyl silicone rubber, modified silicon dioxide, composite modified carbon nanotubes, methyl silicone oil, an antioxidant and an initiator. The vinyl silane coupling agent, the chitosan, the mercaptobenzaldehyde and the zinc oxide are adopted to modify the carbon nanotubes, so that the sealing element material forms a more compact structure, and the tensile strength and the high temperature resistance of the sealing element material are remarkably improved.

The invention discloses a high-strength antibacterial polypropylene staple fiber and a preparation method thereof. The polypropylene staple fiber comprises the following raw materials in parts by mass: 100 parts of polypropylene and 1-3.5 parts of modified nano titanium dioxide, the modified nano titanium dioxide comprises the following raw materials: nano titanium dioxide, a vinyl silane compound, double-end hydrogen-containing silicone oil and styrene in a mass ratio of 100: (3-5): (10-30): (2-5), and the double-end hydrogen-containing silicone oil has two silicon hydrogen end-capping groups; the nano titanium dioxide is subjected to surface treatment by a vinyl silane compound, and then is subjected to hydrosilylation reaction with double-end hydrogen-containing silicone oil and styrene under the action of a platinum catalyst. According to the invention, the polysiloxane chain segment with enhancing, plastifying and broad-spectrum antibacterial effects is introduced to graft the nano titanium dioxide, so that the balance of various properties such as mechanical strength, antibacterial efficiency and softness of the polypropylene staple fiber is realized.

The invention relates to the technical field of lithium batteries, and particularly discloses a preparation method of a positive electrode material for improving the capacity and cycle performance of a lithium battery. Comprising the following operation steps: grinding and mixing NCM, gallium trichloride and polyvinylidene fluoride, calcining in a nitrogen atmosphere to obtain modified NCM, and taking the modified NCM as an active material; the preparation method comprises the following steps: sequentially adding a conductive agent and a vinyl silane coupling agent into 20-30wt% of an ethanol aqueous solution, stirring at 50-60 DEG C for 1-2 hours, and freeze-drying to obtain a vinyl conductive agent; the preparation method comprises the following steps: sequentially adding a vinyl conductive agent, 3-vinyl phenylboronic acid, 4-vinylaniline, N-vinyl pyrrolidone, 1, 3-divinyl-2-imidazolinone and benzoyl peroxide into deionized water, carrying out an oil bath stirring reaction in a nitrogen atmosphere, washing, drying, grinding and sieving to obtain a modified conductive agent; and uniformly mixing the active material, the binder and the conductive agent to obtain the positive electrode material.

The invention provides high-weather-resistance and anti-aging silicone rubber and a preparation method and application thereof.The high-weather-resistance and anti-aging silicone rubber is prepared from, by mass, 100 parts of methyl vinyl silicone rubber, 30-60 parts of white carbon black, 6-8 parts of an alkyl silane coupling agent, 0.5-2 parts of a hindered amine silane coupling agent, 0.5-2 parts of a vinyl silane coupling agent and 3-5 parts of vinyl MQ silicone resin. 1-1.5 parts of vinyl hydroxyl silicone oil; 1-3 parts of organic peroxide; wherein the hindered amine silane coupling agent is obtained by reacting hindered amine with an isocyanate silane coupling agent. Through the formula design, the excellent toughness of the silicone rubber can be maintained, and meanwhile, the long-term weather resistance and the mechanical property retention rate of the material under ultraviolet radiation and humid and hot conditions can be remarkably improved.

The invention belongs to the technical field of polymer materials and electric wires and cables, and discloses a high-toughness cable composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding silane-terminated liquid polybutadiene, hydroxyl silicone oil and an organic tin catalyst into an anhydrous solvent, uniformly mixing, heating to 80-100 DEG C, carrying out dealcoholization condensation reaction, and evaporating to remove the solvent after the reaction is completed, so as to obtain an organic silicon modified polybutadiene cross-linking agent; and (2) adding the obtained organic silicon modified polybutadiene cross-linking agent, PE, EVA, a reinforcing filler and an initiator into an extruder in an oxygen-free atmosphere, carrying out melt blending cross-linking reaction, and carrying out extrusion molding to obtain the high-toughness cable composite material. Compared with a conventional vinyl silane cross-linking agent, the organic silicon modified polybutadiene cross-linking agent disclosed by the invention can remarkably improve the mechanical strength, flexibility and weather resistance of the obtained cross-linked polyethylene composite material.