19665 results about "Cross linker" patented technology

The invention provides a preparation method of a novel recombinant humanized collagen hydrogel. The method comprises the following steps: recombinant humanized collagen and a dialdehyde crosslinking agent are subjected to a reaction, the concentration of the dialdehyde crosslinking agent is 0.01-0.25%, and the recombinant humanized collagen is one or more of recombinant humanized type II collagen, recombinant humanized type III collagen and recombinant humanized type XVII collagen, and the recombinant humanized collagen has a triple helix structure. The aldehydes cross-linking agent suitable for the recombinant humanized collagen, especially the recombinant humanized collagen with a triple helix structure, and the optimal reaction conditions are determined.

The present invention discloses a water-based emulsion of PHA, PBAT and PVOH and its application in paper-based barrier coatings. This emulsion is prepared by first melt-blending PHA and PBAT at 150-170 °C and then dispersing them into an aqueous PVOH solution at 80-95 °C. Plasticizers, cross-linking agents and surfactants can be added to improve the performance. After coating on paper and drying at 80-150 °C, a barrier film with a Cobb value of 10-15 g / m² and a Kit ≥ 10 grade is formed. Compared with traditional PE film laminating or fluorine-containing coatings, this system is more environmentally friendly and recyclable; PVOH dissolves in pulping water, PHA and PBAT are easily separated, and fibers can be efficiently recovered; in composting, soil and marine environments, PHA and PBAT have extensive biodegradability and are superior to PLA which is difficult to recycle and requires industrial composting. It is applicable to food, industrial, special packaging and agricultural paper products.

The invention discloses a repulpable and degradable PHA heat-seal barrier coating and a composition thereof, and belongs to the field of water-based functional coatings and cellulose-based packaging materials. The coating composition is prepared from the following components in percentage by non-volatile solids: 30 to 85 weight percent of polyhydroxyalkanoate emulsion, 5 to 60 weight percent of flaky natural inorganic matters, a water-based cross-linking agent and an auxiliary agent, and 1 to 20 weight percent of ethylene-acrylic acid or ethylene-methyl acrylate dispersion can be selected. The pH value of the composition is 6.5-9.0, and organic fluorine is not artificially added. When the dry weight is 6-20 g / m, the coating meets at least one of the following four items: the water vapor transmission rate (38 DEG C, 90% RH) is less than or equal to 80 g / m.d, Cobb60 is less than or equal to 15 g / m, the oil resistance grade is greater than or equal to 11, and the laboratory repulping rate is greater than or equal to 98%; and the heat-sealing peel strength is greater than or equal to 2.5 N / 15mm under the conditions of 150 DEG C, 0.2 MPa and 0.5 s. And the coating and the stripping film thereof meet the industrial composting standard.

The invention belongs to the technical field of battery electrolytes, and particularly relates to a gel polymer electrolyte as well as a preparation method and application thereof. The gel polymer electrolyte is prepared through in-situ polymerization, and the electrolyte is composed of a monomer, a cross-linking agent, an initiator, an organic solvent and a lithium salt. The monomer is selected from fluorine-containing monomers such as trifluoroethyl acrylate, 2, 2, 3, 3-tetrafluoropropyl methacrylate and the like, and the cross-linking agent is selected from NH-containing cross-linking agents such as N, N '-methylene bisacrylamide, hexamethylene bisacrylamide and the like, so that a polymer side chain fluorine-containing functional group is formed in situ and interacts with lithium ions, and lithium ion transmission is promoted; and the NH functional group on the main chain limits the migration of anions, so that the ion migration number is increased. Therefore, the copolymerized fluorine-containing monomer and nitrogen-containing cross-linking agent gel polymer electrolyte enables the battery to show good specific discharge capacity and cycling stability under high current density.

It is disclosed new conducting and stretchable hydrogels and “one-pot” process to making them from natural and eco-friendly components, including gelatin, chitosan, and glycerol. Various conducting materials, such as poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), thermally reduced graphene (TRG), or MXene are introduced in the hydrogels to enhance their conductivity. The resulting conducting hydrogels exhibit remarkable robustness, do not require crosslinking agent, and possess a unique thermo-reversible property, simplifying the fabrication process and ensuring enhanced long-term stability. Moreover, their fabrication is sustainable, employing environmental-friendly materials and processes, while retaining their skin-friendly characteristics. It is also disclosed hydrogel electrodes that were tested for ECG signal acquisition and outperformed the commercial electrodes. The hydrogel-based electrodes deliver high-quality ECG signals, boasting a superior signal-to-noise ratio (SNR) and remarkable resilience against interference and motion artifacts, compared to their commercial AgCl counterparts.

The invention relates to the technical field of polyurethane production, in particular to a polyurethane super-hydrophobic foam composite material for packaging and a preparation method thereof. The polyurethane super-hydrophobic foam composite material for packaging is prepared by reacting a component A and a component B according to a mass ratio of 100: (31.7-46.5), wherein the component A comprises polyether polyol X with high molecular weight and high activity, polymer polyol, a chain extender, a cross-linking agent, an organic metal catalyst, a tertiary amine catalyst, a foam stabilizer, a foaming agent, a flame retardant, inorganic filler and the like, and the component B is isocyanate modified by polyether polyol Y with high functionality. An ester bond, a rigid benzene ring group and a Si-O-Si chain segment are introduced into a polyether polyol molecular chain segment to improve the internal soft segment structure and chemical crosslinking density of the polyurethane foam, and the prepared super-hydrophobic polyurethane foam not only has excellent hydrophobicity and high temperature resistance, but also is low in density and good in mechanical property.

The invention discloses a bio-based foam adsorption material as well as a preparation method and adsorption application thereof. The bio-based polymer is used as a foam skeleton, the adsorbent with a large specific surface area is added to further improve the foam adsorption capacity, the cross-linking agent and the reinforcing filler improve the overall strength of the foam, and the bio-based foam adsorption material with the high adsorption capacity is obtained. The bio-based foam disclosed by the invention is light in weight, controllable in hydrophilicity and hydrophobicity, and capable of separating and removing pollutants such as oil and organic dye. The foam has high adsorption capacity and good cyclic adsorption capacity, can be repeatedly used, is biodegradable, does not pollute the environment, can effectively adsorb dangerous chemicals existing in a water body, does not cause secondary pollution, and can be used for decontamination treatment of organic pollutants in industrial wastewater.

The invention belongs to the technical field of composite coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and a preparation method thereof.The corrosion-resistant and ultraviolet-resistant protective coating for the wind power generation equipment is prepared from, by mass, 40-60 parts of gradient fluorosilicone modified polyurethane resin, 5-12 parts of core-shell type ZnO-coated MOFs composite particles, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. According to the invention, the problems of poor ultraviolet resistance, poor weather resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance and the like in the existing coating and the preparation process thereof are well solved; the shielding layer is single and incapable and has a poor self-repairing effect; and the coating toughness of an epoxy resin system is insufficient and cannot adapt to fatigue deformation of equipment under a vibration working condition.

The invention belongs to the field of intelligent soft materials, and discloses conductive eutectic gel with self-adhesion, wide-temperature strain sensing and high sensitivity as well as a preparation method and application of the conductive eutectic gel. The eutectic gel is prepared from polydopamine, polyvinyl alcohol, a polymer monomer, a eutectic conductive agent (which is prepared by adding ethylene glycol and a conductive agent into a polyvinyl alcohol solution and stirring), a cross-linking agent, an initiator and water. Strain sensing related tests prove that the gel has excellent sensitivity and strain sensing performance, and has application potential in the fields of high and low temperature severe environment monitoring, human health monitoring and motion monitoring.

The invention provides a temperature-resistant and salt-resistant cross-linking tackifying filtrate reducer for a soil-phase-free water-based drilling fluid as well as a preparation method and application of the temperature-resistant and salt-resistant cross-linking tackifying filtrate reducer, and belongs to the technical field of drilling. The temperature-resistant and salt-resistant cross-linking tackifying filtrate reducer for the soilless phase water-based drilling fluid comprises the following raw materials in parts by weight: N, N-dimethylformamide, a cross-linking agent and a cross-linking agent, the invention relates to a water-based adhesive which is prepared from the following components in parts by weight: 15 to 25 parts of N, N-dimethylacrylamide, 1 to 10 parts of 3-[(3-methacrylamidopropyl) dimethylammonium] propane-1-sulfonate, 1 to 10 parts of long-chain alkyl polyoxyethylene ether methacrylate, 0.005 to 0.015 part of macromolecular cross-linking agent, 0.03 to 0.08 part of initiator A and 80 to 100 parts of deionized water. The tackifying filtrate reducer can resist the temperature of 180 DEG C, can resist NaCl to be saturated, has excellent tackifying, shear-improving and filtrate-reducing effects under high-temperature and high-salt conditions, improves the rheological property and the filtrate-reducing property of drilling fluid, and ensures safe and efficient drilling of a deep well.

Described are compositions for use as and methods for generating water harvesting material. The disclosed compositions can include a thermoresponsive gel network, a hygroscopic material, a copolymer, a photothermal agent, a crosslinking agent, or any combination thereof to generate or for use as an atmospheric water harvesting material. The disclosed compositions and methods advantageously allow for the efficient sorption and desorption of atmospheric moisture in low relative humidity environments. The atmospheric water harvesting material can be useful for generating potable water in environments for example, where access to clean water is limited.

The invention relates to regenerated cellulose fiber as well as a preparation method and application thereof. Comprising the following steps: dissolving a cellulose raw material in a solvent; adding a pore-forming agent, a dispersing agent and a cross-linking agent, mixing, and carrying out vacuum defoaming; spinning: enabling the stock solution trickles to sequentially pass through a first coagulating bath, a second coagulating bath and a third coagulating bath; the first coagulating bath is an acidic solution, so that a hollow structure is formed in the fiber; forming a nano-scale pore structure on the outer layer of the fiber in the second coagulating bath; the acid introduced by the first coagulating bath and the solvent introduced by the second coagulating bath are replaced by the third coagulating bath through solvent exchange, and meanwhile, the fibers are gelatinized to form a three-dimensional network structure; and drafting, drying, curling and winding the nascent cellulose fiber to obtain the regenerated cellulose fiber. The technical problem to be solved is how to enable the regenerated cellulose fiber to have a unique structure of internal hollow macropores and external nanoscale pores, and improve the thermal insulation performance, air permeability and hygroscopicity of the fiber. The mechanical property is excellent, the preparation method is simple, and the cost is low.

The invention relates to the technical field of lithium metal batteries, in particular to a flame-retardant in-situ polymerization gel electrolyte battery and a preparation method thereof.The flame-retardant in-situ polymerization gel electrolyte battery comprises a positive plate, a negative plate, a diaphragm and gel electrolyte; the gel electrolyte is mainly formed by mixing a liquid electrolyte, a polymeric monomer, a cross-linking agent, a flame retardant and an initiator and then performing in-situ polymerization. A polymeric monomer and a cross-linking agent are subjected to a thermally-initiated in-situ free radical polymerization reaction, a spatial net-shaped structure is formed through a cross-linked molecular chain, and the polymer is filled with a liquid electrolyte and a flame retardant, so that the gel electrolyte with a flame-retardant effect is obtained and is applied to a lithium metal battery; and the interface stability and cycle stability between the electrolyte and the positive / negative electrode can be enhanced. Meanwhile, the mechanical property of the gel electrolyte can be adjusted and improved by utilizing the polymeric monomer, so that a solid-solid contact interface in the battery can be improved; moreover, through component optimization, the ionic conductivity of the gel electrolyte can be improved, and rapid transmission of lithium ions is facilitated.

The invention discloses a high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film and a preparation method thereof. The high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film is prepared from the following raw materials in parts by weight: 100 parts of polypropylene; 17 to 36 parts of polyvinylidene fluoride; 3-12 parts of enhanced and improved talcum powder; 1-6.5 parts of modified barium titanate; 1-6 parts of a cross-linking agent; 2-10 parts of a compatilizer; and 0.05-2 parts of an initiator. The capacitor base film is high in mechanical strength, and has excellent high temperature resistance, thermo-oxidative aging resistance, high voltage resistance and anti-breakdown performance; the enhanced and improved talcum powder is constructed by taking expanded layer modified talc as a carrier and titanium dioxide-carbon dot composite particles as a loading component and grafting and coating the organic matter, so that the defects of the talcum powder can be overcome, and the improvement effect of the talcum powder on heat resistance, high-voltage resistance and breakdown resistance can be fully exerted; meanwhile, the system can be endowed with excellent thermo-oxidative aging resistance.

The invention discloses a multistage crosslinking organic boron crosslinking agent capable of resisting high temperature of 180 DEG C and a preparation method of the multistage crosslinking organic boron crosslinking agent. The crosslinking agent comprises the following components in parts by weight: 3-4 parts of a boron-containing polymeric monomer, 10-12 parts of boric acid ester, 2-3 parts of a boron-containing compound, 15-18 parts of a solvent 1, 2-3 parts of a solvent 2, 0.5-1 part of a first ligand, 13-15 parts of a second ligand, 20-25 parts of a third ligand, 1-1.5 parts of alkenyl oxygen-containing silane and 2-3 parts of a strong hydrophilic monomer. The preparation method comprises the following steps: firstly, carrying out surface graft copolymerization on a boron-containing polymeric monomer to the surface of a nano material to prepare a boron-containing small-molecule polymer, and then chelating the boron-containing small-molecule polymer, boric acid ester, a boron-containing compound and the like step by step by using various chelating agents to obtain the organic boron cross-linking agent disclosed by the invention. After the cross-linking agent is compounded with a fracturing fluid, boron carriers with different release speeds are opened layer by layer, borate ions are released to be subjected to multi-stage cross-linking with the fracturing fluid, slow gelling is realized, a unique nano material is introduced to enhance the spatial structure and mechanical stability of gel, and the temperature resistance of the fracturing fluid is greatly improved.

The invention discloses environment-friendly oil-proof and water-proof packaging paper and a preparation method thereof.The surface of body paper is coated with an oil-proof agent to form an oil-proof coating, the oil-proof coating is coated with a water-proof agent to form a water-proof coating, and the oil-proof agent comprises a chitosan solution, a sodium alginate solution, a cross-linking agent and glycerin; the waterproof agent comprises a palm oil paraffin solution and hydrophobic nano silicon dioxide. The packaging paper disclosed by the invention has excellent oil-proof and water-proof performance and can be biodegraded, so that the pollution to the environment is reduced. The invention further discloses a preparation method of the environment-friendly oil-proof and water-proof packaging paper, operation is easy, and mass production of the oil-proof and water-proof packaging paper is facilitated.

The invention discloses one-step solvent-free methyl phenyl-terminated vinyl polysiloxane and silica gel, and the methyl phenyl-terminated vinyl polysiloxane is prepared by the following steps: adding octamethylcyclotetrasiloxane, octaphenylcyclotetrasiloxane and dimethyl-terminated vinyl silicone oil into a reaction container, and uniformly stirring; vacuumizing the reaction container, and introducing nitrogen to form an oxygen-free environment; heating the reaction container to 180-200 DEG C step by step, and adding a catalyst at 50-80 DEG C; the step-by-step heating comprises a first-stage pre-polymerization reaction at the temperature of 90 DEG C or below and a second-stage polymerization reaction at the temperature of 90 DEG C or above, and methyl phenyl vinyl-terminated polysiloxane is prepared. The high-temperature-resistant and high-pressure-resistant methyl phenyl silica gel is obtained by mixing methyl phenyl vinyl-terminated polysiloxane with an inhibitor, a cross-linking agent and a cross-linking catalyst, degassing, heating, cross-linking and curing, the performance requirements of high-power semiconductor devices on high-pressure resistance, high-temperature resistance and the like of packaging materials can be met, the product quality is stable, and the production efficiency is high.

The invention discloses a preparation method of flame-retardant silicone rubber resistant to long-term thermal aging, and relates to the technical field of high-molecular compound composition anti-aging rubber. The flame-retardant silicone rubber is prepared from the following components in parts by mass: 75 to 100 parts of methyl vinyl silicone rubber raw rubber, 18 to 28 parts of fumed silica, 20 to 35 parts of aluminum oxide trihydrate, 0.5 to 3 parts of platinum flame-retardant synergist, 2 to 5 parts of heat-resistant additive, 1.5 to 2.5 parts of structured control agent, 1 to 2 parts of cross-linking agent, 2 to 10 parts of anti-aging agent and 8 to 13 parts of fluorinated silicone rubber. Through a synergistic flame-retardant system, the silicone rubber disclosed by the invention shows obvious advantages in flame-retardant capability, can reach a higher flame-retardant grade, effectively delays flame propagation, and reduces the risk of fire disasters. The weather resistance of the silicone rubber is remarkably improved due to the ultraviolet absorption function and the anti-oxidation function of the anti-aging agent, so that the silicone rubber can effectively resist ultraviolet rays and oxidation under the long-term outdoor solarization condition, and the performance reduction and the appearance deterioration are reduced.

The invention relates to the technical field of oilfield exploitation, and discloses a nanometer oil-displacing agent for oilfield oil extraction and a preparation method thereof.The nanometer oil-displacing agent takes modified nanometer silicon dioxide and a surfactant as main components, polymer macromolecules are modified on the surface of the nanometer silicon dioxide to serve as a main body of the nanometer oil-displacing agent, and the nanometer oil-displacing agent is prepared. Under the action of the surfactant, the nano silicon dioxide can flow into the fine throat and the micro throat, and the polymer macromolecules of the branched structure can generate a relatively strong interaction force with the rock, so that the polymer macromolecules are firmly adhered to the surface of the rock, the adhesion of crude oil on the surface of the rock is reduced, a smooth crude oil channel is constructed, and the flowing pressure of liquid is reduced; and crude oil fluidity is improved. The structure of the cross-linking agent contains quaternary ammonium cations, so that the electrostatic repulsion effect between nano silicon dioxide can be greatly enhanced, aggregation between nano silicon dioxide and nano silicon dioxide can be avoided, the interfacial tension can be efficiently maintained, the oil-water interfacial tension is greatly reduced, and the recovery rate of crude oil is effectively increased.

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention discloses a self-crosslinking temperature-resistant salt-resistant emulsion type fracturing fluid thickening agent and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The raw materials adopted by the invention comprise 30 to 50 parts of an oily solvent, 15 to 25 parts of deionized water, 10 to 20 parts of acrylamide, 5 to 10 parts of acrylic acid, 2 to 4 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.05 to 0.2 part of a crosslinking monomer, 0.5 to 1 part of a quaternary ammonium salt type hydrophobic association monomer, 4 to 8 parts of an emulsifier and 1 to 2 parts of a phase inversion agent. The self-crosslinking emulsion is formed through water phase-oil phase mixing, high-speed emulsification, low-temperature initiation polymerization and phase inversion treatment. Based on physical-chemical double-crosslinking temperature control cooperation, a salt-resistant-hydrophobic double-shielding mechanism and an integrated design without an exogenous crosslinking agent, the contradiction between the temperature-resistant and salt-resistant performance of a traditional thickening agent and the process complexity is broken through, and a technical support is provided for efficient development of high-temperature and high-salt oil and gas reservoirs.

The invention discloses a graphdiyne multilayer composite membrane and a preparation method thereof, and belongs to the technical field of membrane separation. A porous base membrane with an alkynyl layer is obtained by adopting a two-step modification method, then the porous base membrane is soaked in a solution containing a graphdiyne monomer and a catalyst, and a reaction is performed at a certain temperature, so that a graphdiyne material fully grows on the surface of the porous base membrane. Adding a membrane casting solution formed by mixing an organic polymer, a cross-linking agent, a catalyst and an organic solvent to the surface of the graphdiyne-loaded porous base membrane, volatilizing the organic solvent, and curing at 80 DEG C to form the membrane. The ethanol permselective membrane has a three-layer membrane structure, namely the organic polymer layer, the ultrathin graphdiyne transition layer and the porous support layer, so that the problems of agglomeration and pore permeation of a nano material are effectively avoided, and the adsorption process of ethanol is further enhanced. The membrane prepared by the invention has higher pervaporation alcohol permeation performance, can efficiently and stably recover alcohols, and provides reference for the development of a novel pervaporation membrane structure with preferential alcohol permeation.

The invention belongs to the technical field of solid-state lithium batteries, and relates to a fluorinated double-salt cross-linked solid-state electrolyte adaptive to a lithium-free negative electrode, a solid-state lithium battery and a preparation method thereof.The preparation method comprises the steps that double-lithium salt is dissolved in a fluorinated solvent to obtain an electrolyte, then a monomer, a cross-linking agent and an initiator are added, the mixture is stirred to be uniform to obtain a precursor solution, and the precursor solution is prepared; and assembling the precursor solution, a positive electrode, a negative electrode and a solid-state electrolyte composite diaphragm into a battery, and performing gradient polymerization to form the solid-state lithium battery. According to the invention, the ionic conductivity of the solid electrolyte is more than 5 * 10 <-4 > S / cm and the oxidation potential of the solid electrolyte is more than 5.8 V by adopting a fluorinated solvent consisting of fluorinated carbonate and fluorinated carboxylate and a double-lithium-salt synergistic system and combining an in-situ interface fusion technology, so that the solid electrolyte can be matched with a 4.8 V high-voltage lithium-rich manganese-based positive electrode and a lithium-free negative electrode; and the energy density and the safety of the solid-state lithium battery are improved. The electrolyte scheme is low in cost, high in safety and good in positive and negative electrode matching performance, can be compatible with an existing battery production line, and is convenient for large-scale production.

The invention belongs to the technical field of hydrogel, and relates to piezoelectric / conductive integrated hydrogel for jaw defect repair, which is prepared from methylacryloyl protein, zwitterionic monomer and titanate piezoelectric particles through ultraviolet crosslinking under the action of a crosslinking agent and a photoinitiator, the hydrogel comprises, by mass, 1.0%-10% of methacrylated protein, 1.0%-10% of zwitterionic monomers, 1.0%-10% of titanate piezoelectric particles and 0.1%-5% of an initiator, and the volume fraction of an accelerant is 0.05%-1.0%. The hydrogel disclosed by the invention has excellent mechanical strength and certain flexibility, can realize piezoelectric and conductive functions of the hydrogel, can effectively promote proliferation, differentiation and mineralization of bone cells under the action of an electric field, accelerates bone tissue repair, and has a more remarkable bone regeneration effect compared with a non-electrical stimulation material in the prior art.

The invention provides a double-layer polymer solid electrolyte, a preparation method thereof and a lithium ion battery, and belongs to the technical field of solid electrolyte manufacturing. The first polymer solid electrolyte layer comprises the following raw materials in parts by weight: 4-30 parts of a first reactive monomer A, 5-25 parts of a first reactive monomer B, a first cross-linking agent, a first photoinitiator, a first lithium salt, 1-20 parts of a first carbonic ester plasticizer and 20-45 parts of a nitrile plasticizer; the second polymer solid electrolyte layer comprises the following raw materials in parts by weight: 4-30 parts of a second reactive monomer A, 5-25 parts of a second reactive monomer B, a second cross-linking agent, a second photoinitiator, a second lithium salt, 1-35 parts of a second carbonic ester plasticizer and 10-35 parts of a fluorine-containing plasticizer; the double-layer polymer solid electrolyte has the advantages of relatively high ionic conductivity and compatibility of a high-voltage battery positive electrode and a low-voltage lithium metal negative electrode, so that the corresponding battery has relatively excellent cycle performance and relatively high capacity.

The preparation method of the silicon-carbon composite material comprises the following steps: uniformly mixing a carbon source, a pore forming agent and a cross-linking agent, and introducing peroxide gas into a tubular furnace for sintering to obtain porous carbon; uniformly mixing the porous carbon with liquid silane and a surfactant, and transferring the mixture into a high-pressure reaction kettle for reaction to obtain a silicon-carbon precursor; and introducing the obtained material into a carbon source gas containing a heteroatom gas for deposition to obtain the silicon-carbon composite material. The obtained material generates porous carbon with high strength and high pore volume by utilizing the cross-linking agent and the pore-forming agent thereof, so that the expansion is reduced; and the liquid silane has the characteristics of low decomposition temperature, low cost and high safety performance, so that the specific capacity is improved, and the cost is reduced.

The invention relates to the technical field of solid-state batteries, in particular to a solid-state electrolyte composite membrane, a preparation method thereof and a solid-state battery. The preparation method comprises the following steps: performing ultrasonic-initiated cross-linking polymerization on a polymer solid electrolyte monomer, a cross-linking agent and a surface hydroxylated oxide solid electrolyte to obtain a polymer-oxide solid electrolyte matrix, washing the polymer-oxide solid electrolyte matrix, and soaking the polymer-oxide solid electrolyte matrix in an electrolyte to obtain the solid electrolyte composite membrane. According to the invention, crosslinking of the polymer electrolyte monomer is initiated by ultrasound, and chemical bonds are formed between part of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte, so that the interfacial compatibility of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte is effectively improved, and the ionic conductivity, chemical stability and mechanical strength of the polymer electrolyte are improved; due to the properties of easy processing, good flexibility and the like of the polymer electrolyte, the interface compatibility between the oxide solid electrolyte and the positive and negative pole pieces can be fully improved, the flexibility and the processability are improved, and a win-win effect is achieved.

The invention discloses a self-repairing polymer electrolyte, a preparation method and application thereof, and a polymer lithium battery, the self-repairing polymer electrolyte comprises the following preparation raw materials by mass: 50-100 parts of polysiloxane diacrylate, 1-10 parts of disulfide diacrylate, 10-40 parts of a cross-linking agent, 60-120 parts of a plasticizer, 60-120 parts of a lithium salt, and 1-10 parts of a photoinitiator. According to the self-repairing polymer electrolyte disclosed by the invention, a thiol-ene click reaction can be carried out between carbon-carbon double bonds in polysiloxane diacrylate and disulfide diacrylate and sulfydryl of the cross-linking agent, so that a dynamic disulfide bond and hydrogen bond network structure is endowed to the self-repairing polymer electrolyte; and the dynamic disulfide bond and the hydrogen bond can enable the electrolyte membrane to realize self-healing at room temperature without external stimulation.

The invention provides a hard carbon material and a preparation method thereof, and the preparation method comprises the following steps: (S1) crushing asphalt, and carrying out heat treatment in an oxidizing atmosphere to obtain a pre-oxidized precursor; (S2) uniformly mixing the pre-oxidized precursor with a cross-linking agent I, and carrying out primary cross-linking under inert atmosphere and heating conditions to obtain a cross-linked precursor I; the cross-linking agent I is a polymer of which the side chain contains carboxyl; (S3) uniformly mixing the cross-linked precursor I and a cross-linking agent II, and carrying out secondary cross-linking in an inert atmosphere under a heating condition to obtain a cross-linked precursor II; the cross-linking agent II is a micromolecular aromatic hydrocarbon compound (S4) cross-linking precursor II containing a plurality of anhydrides and / or carboxyl groups, calcining, cooling and grinding in an inert atmosphere to obtain the amorphous sodium ion battery negative electrode material. The negative electrode material obtained by the preparation method disclosed by the invention has the advantages of high capacity, high magnification, low cost, simple preparation process, adjustable disorder degree and high carbon yield, and is a carbon material suitable for large-scale production.

The invention relates to the technical field of photovoltaic adhesive films, in particular to a three-layer composite EVA packaging adhesive film, a preparation method thereof and a photovoltaic module. The three-layer composite EVA packaging adhesive film comprises a first adhesive layer, a second adhesive layer and a third adhesive layer, the first adhesive layer comprises EVA resin, a first anti-PID agent and a second anti-PID agent; the second adhesive layer comprises EVA resin, a composite self-crosslinking agent and a water-binding agent; and the third adhesive layer comprises EVA resin and a composite acid-binding agent. According to the EVA packaging adhesive film, through the design of the three-layer structure, the Na ion capturing and blocking capacity and the free water vapor and acetate ion absorbing and binding capacity of the EVA packaging adhesive film are sequentially improved, the EVA packaging adhesive film has the performance characteristics of being high in adhesive force, high in light transmittance, resistant to damp and hot corrosion, resistant to PID attenuation and the like, meanwhile, the three layers of base materials are all made of EVA, compatibility of all the layers is good, and the packaging effect is good. And the production cost is low, and the method is more suitable for large-scale production and packaging application at a double-glass TOPCon battery assembly end.