253results about How to "Excellent self-healing performance" patented technology

The invention discloses a multifunctional electronic product screen protective film and a preparation method thereof. The protective film comprises a modified base film and a multifunctional composite layer compounded on the surface of the modified base film, the multifunctional composite layer comprises an elastic buffer layer and a self-repairing layer which are sequentially arranged from inside to outside; wherein the elastic buffer layer is an elastic buffer layer with gradient density; the elastic buffer layer comprises the following components in parts by weight: 100 parts of a thermoplastic polyurethane elastomer, 15-25 parts of hollow glass microspheres, 10-15 parts of polyethylene glycol and 3-6 parts of an isocyanate cross-linking agent; the self-repairing layer comprises the following components in parts by weight: 100 parts of a dynamic reversible covalent bond polymer, 30-40 parts of phase change material microcapsules, 10-15 parts of nano cellulose, 5-8 parts of a near-infrared photosensitive initiator and 2-4 parts of an antioxidant. Compared with the prior art, the protective film provided by the invention has excellent scratch self-repairing performance, good adhesion and high anti-explosion screen performance.

The invention relates to the technical field of plastics, in particular to an antibacterial food packaging bag and a preparation method thereof.The antibacterial food packaging bag is prepared by blending polylactic acid and polypropylene carbonate as a base film raw material, selecting a food-grade ADR chain extender as a chain extender, selecting one of butyl titanate and a titanate coupling agent as a compatibilizer and selecting composite hybrid cellulose as a broad-spectrum antibacterial agent; carrying out extrusion granulation and blow molding to obtain a base film; the preparation method comprises the following steps: taking microcrystalline cellulose-nano zinc oxide hybrid particles as hybrid cellulose, performing epoxidation on the hybrid cellulose by using epoxy chloropropane, and then grafting an amino acid-based Schiff base antibacterial agent by using epoxy-hydroxyl reaction; composite hybrid cellulose and modified castor oil-based waterborne polyurethane are used for preparing a protective coating, the surface of a base membrane is coated with the protective coating, and a green, environment-friendly, durable, antibacterial, hydrophobic and antifouling self-repairing surface is constructed.

The invention relates to the technical field of adhesives, and discloses an antibacterial mildew-proof water-based adhesive and a preparation method thereof. The preparation method of the antibacterial and mildew-proof water-based adhesive comprises the following steps: reacting 2, 2-dimethylolpropionic acid with castor oil to obtain hyperbranched bio-based polyol; modifying the hyperbranched bio-based polyol by using a modifier to obtain modified bio-based polyol; the preparation method comprises the following steps: preparing a waterborne polyurethane dispersion liquid by taking modified bio-based polyol, a hybrid modified BN / MOF composite material and hexamethylene diisocyanate as raw materials and 1, 4-butanediol as a chain extender; the preparation method comprises the following steps: mixing a waterborne polyurethane dispersion liquid, a wetting agent, a defoaming agent, a thickening agent and water to obtain a component A; an aliphatic curing agent is used as a component B; during use, the component A and the component B are mixed and stirred. The antibacterial and mildewproof water-based adhesive disclosed by the invention has excellent adhesion performance, water resistance, self-repairing performance and lasting antibacterial and mildewproof performance.

The invention relates to the technical field of epoxy resin coatings, and discloses an inorganic composite nano anticorrosive coating material and a preparation method thereof. The inorganic composite nano anticorrosive coating material comprises a component A, a component B and a component C, wherein the component C is obtained by mixing a functional modified inorganic composite nano material and aluminum sorbate; the component A is obtained by mixing modified epoxy resin, a defoaming agent and an anti-settling agent, and the component B comprises a polyamide curing agent. The inorganic composite nano anticorrosive coating material disclosed by the invention has excellent toughness, wear resistance, corrosion resistance, antibacterial and antifouling properties and ultraviolet resistance.

The invention belongs to the technical field of transparent self-repairing conductive elastomer materials, and discloses a high-performance transparent self-repairing conductive elastomer and a preparation method thereof. The method comprises the following steps: 1) reacting polyester diol with diisocyanate under the action of a catalyst to obtain an isocyanato-terminated polyurethane prepolymer; 2) mixing benzene ring-containing dihydrazide with the polyurethane prepolymer, carrying out chain extension reaction, adding bis (trifluoromethanesulfonyl) lithium imide, and carrying out curing molding to obtain a polyurethane-urea conductive elastomer; the dihydrazide is one or more of isophthalic acid dihydrazide or terephthalic acid dihydrazide. The method disclosed by the invention is simple, and the obtained elastomer material has high transparency, high mechanical property and better self-repairing performance; meanwhile, the material has good conductivity and excellent stretching resilience, can be used as an excellent stretchable conductor material, and has huge application potential in the aspects of monitoring human body dynamic activities, monitoring mechanical movement, monitoring a man-machine interaction process and the like.

The invention relates to the technical field of rubber additives, in particular to a cross-linking agent for rubber and a preparation method. The cross-linking agent for rubber is prepared from the following raw materials in parts by mass: 5 to 10 parts of polystyrene microspheres, 1 to 5 parts of tetramethyl orthosilicate, 0.1 to 0.5 part of copper sulfate, 1 to 2 parts of a surfactant, 1 to 2 parts of vinyl trimethoxy silane, 0.01 to 0.1 part of an initiator, 2 to 6 parts of vinyl acetate, 1 to 2 parts of cobalt acetate, 0.01 to 0.1 part of yttrium chloride and 1 to 2 parts of graphene oxide. Transition metal salt and rare earth are compounded and loaded on the surface of grafted silicon dioxide, the specific surface area of the metal salt can be effectively increased, the coordination efficiency is improved, the adding amount of the metal salt is reduced, meanwhile, self-repairing of crosslinking and reinforcing functions can be effectively achieved, and the crosslinking agent is high in stability and has higher environmental tolerance.

The invention relates to the technical field of daily chemicals, in particular to a white tomato whitening and repairing composition as well as a preparation method and application thereof. The composition comprises the following components in percentage by mass: 68-85% of jojoba oil, 10-25% of squalane and the balance of white tomato extract, wherein the total percentage is 100%. The white tomatoes are rich in colorless carotenoids (such as phytoene and tetrahydrolycopene), and have excellent antioxidant and whitening capabilities: melanin formation is inhibited, and the colorless carotenoids can inhibit tyrosinase activity, reduce melanin generation and fundamentally whiten the skin. Pigmentation caused by ultraviolet rays can be relieved through the anti-oxidation effect, and the color spots are prevented and faded. The skin color can be brightened after continuous use, so that the skin presents natural luster.

The invention relates to the technical field of high-molecular compounds, in particular to a diamine monomer, self-repairing thermoplastic polyimide resin and a preparation method. The molecular structural formula of the diamine monomer is # imgabs0 #, in the formula, Y is one of N atoms or O atoms, and m is any integer between 1 and 5. The self-repairing thermoplastic polyimide resin prepared from the diamine monomer has a dynamic disulfide bond cross-linked structure, and compared with a structure containing a disulfide bond in a polyimide main chain, the polyimide resin has higher structural strength and better performance after being repaired; the technical problems that an existing polyimide material is poor in material self-repairing capacity and poor in mechanical property can be effectively solved.

The invention discloses an intrinsic flame-retardant self-repairing roadway surface thin-spraying supporting material and application thereof.The intrinsic flame-retardant self-repairing roadway surface thin-spraying supporting material comprises a first component and a second component, and the first component comprises, by mass, 40-80 parts of isocyanate, 15-50 parts of first polyol, 0-10 parts of a viscosity reducer, 1-7 parts of a maleimide cross-linking agent and 0.01-0.5 part of a polymerization inhibitor; the second component is prepared from the following components in parts by mass: 60 to 85 parts of second polyhydric alcohol, 10 to 30 parts of flame-retardant dihydric alcohol, 2 to 10 parts of antistatic agent and 0.2 to 2 parts of catalyst; the flame-retardant dihydric alcohol comprises a conjugated structure. The thin spraying support material has excellent intrinsic self-repairing performance, intrinsic flame retardant property, mechanical property and strong adhesive property, self-repairing of local cracking of a spraying layer can be achieved, and the safety level of a roadway is improved.

The invention discloses low-VOC (volatile organic compound) formula waterborne polyurethane industrial paint and a preparation method thereof, and relates to the field of paint. The waterborne polyurethane industrial paint with the low VOC formula is prepared from a waterborne polyurethane emulsion, fluoride-based nanoparticles, aliphatic isocyanate, a self-repairing polymer, carbon nanotubes, silane quaternary ammonium salt, a photosensitive curing agent, indium tin oxide, polydimethylsiloxane, zinc pyrithione, polyether siloxane and ammonium tripolyphosphate. According to the waterborne polyurethane industrial paint, the waterborne polyurethane emulsion, the self-repairing polymer, the carbon nanotubes, the indium tin oxide, the aliphatic isocyanate, the polyether siloxane and the like are combined, and the waterborne polyurethane industrial paint is low in VOC, excellent in wear resistance, weather resistance, static resistance and self-repairing performance, environmentally friendly, safe, wide in application prospect and suitable for popularization and application. And lasting protection and attractive effects can be provided for the industrial environment, and meanwhile the convenience of operation and maintenance is improved.

The invention discloses a cation modified soft PVC membrane material and a preparation method thereof, and relates to the technical field of high polymer materials. When the cation modified soft PVC membrane material is prepared, pre-modified polyvinyl chloride and an allyl salicylaldehyde Schiff base ligand react to prepare modified polyvinyl chloride; the preparation method comprises the following steps: carrying out a reaction on 5-oxo-2, 3-dihydro-5H-thiazolo [3, 2-a] pyridine-3, 7-dicarboxylic acid and N-(2-ethoxyl) maleimide to prepare a bismaleimide ultraviolet absorbent; reacting the pre-modified zinc oxide with 2-chloromethyl furan to obtain modified zinc oxide; and mixing the modified polyvinyl chloride, the modified zinc oxide, a bismaleimide ultraviolet absorbent, zinc acetate, diisononyl phthalate, epoxidized soybean oil and calcium stearate, plastifying, calendering, cooling and rolling to prepare the cation modified soft PVC membrane material. The cation modified soft PVC membrane material prepared by the invention has excellent antibacterial, anti-aging and self-repairing properties.

The invention discloses a polymer PET composite board and a preparation method thereof, and relates to the technical field of composite materials. When the high-molecular PET composite board is prepared, 4-(2-furan)-3-thiosemicarbazone and 6-hydroxyhexanal react and then react with copper chloride to prepare a thiosemicarbazone copper complex; polymerizing terephthalic acid, ethylene glycol and the thiosemicarbazone copper complex to prepare functional polyester; the preparation method comprises the following steps: carrying out polymerization growth on pre-treated silicon nitride by using 1, 3-bis (chloromethyl)-1, 1, 3, 3-tetramethyldisiloxane and 10-(2, 5-dihydroxyphenyl)-10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide on the pre-treated silicon nitride, so as to prepare pre-modified silicon nitride; the pre-modified silicon nitride and N-(2-aminopropyl) maleimide are subjected to a reaction, and modified silicon nitride is prepared; and melting and mixing the functional polyester and the modified silicon nitride, and then calendaring and molding to obtain the high-molecular PET composite board. The high-molecular PET composite board prepared by the invention has excellent mildew-proof, antibacterial, flame-retardant, wear-resistant and self-repairing properties.

The invention relates to waterborne polyurethane as well as a preparation method and application thereof. The waterborne polyurethane is prepared from the following raw materials: diisocyanate, polyol, a chain extender, gallic acid, a salt-forming agent and a metal organic framework, the metal organic framework is composed of a metal center and an organic ligand; the metal center comprises copper and / or zinc; the organic ligand comprises an organic matter containing carbonyl and hydroxyl. The gallic acid and the metal organic framework are introduced into the preparation raw materials of the waterborne polyurethane to synergistically improve the mechanical strength and the self-healing performance of the material, and meanwhile, the waterborne polyurethane is endowed with antibacterial ability, so that the waterborne polyurethane can meet the application requirements of more fields.

The invention discloses a heavy anti-corrosion coating containing polyurethane microcapsules, a preparation method of the heavy anti-corrosion coating and a coating. A primer comprises a component A and a component B. The component A comprises epoxy resin; a solvent; bentonite; a microcapsule; the flaky basalt scales are coated with the polydopamine; zinc powder; steel slag shield powder; soybean lecithin; the component B comprises a solvent; a polyamide resin; the intermediate paint comprises a component A and a component B. The component A comprises a solvent; a hydroxy acrylic resin; an epoxy resin; bentonite; soybean lecithin; a microcapsule; the flaky basalt scales are coated with the polydopamine; micaceous iron powder; titanium dioxide; carbon black; the component B comprises a solvent; a polyamide resin; the finish paint comprises a component A and a component B. The component A comprises organic silicon modified acrylic resin; a silicone resin; hollow microspheres; the flaky basalt scales are coated with the polydopamine; titanium dioxide; soybean lecithin; fumed silica; a solvent; a catalyst; and the component B comprises a curing agent and microcapsules.

The invention belongs to the technical field of polyurethane aerogel materials, and relates to a preparation method and application of bio-based waterborne polyurethane aerogel, the preparation method comprises the following steps: carrying out Aza-Michael addition reaction on amination modified sodium alginate and polyethylene glycol methacrylate terminated waterborne polyurethane, and freeze-drying to obtain the bio-based waterborne polyurethane aerogel, the prepared bio-based waterborne polyurethane aerogel can be used for a thermal insulation material, an oil stain cleaning material or a biomedical bracket. Compared with the prior art, the preparation method has the advantages that the problem of poor compatibility of polysaccharide and polyurethane in a traditional mixing method is solved, the aerogel is endowed with good biodegradability, mechanical property, adiabaticity, flame retardance and self-repairing property, and a new material choice is expected to be provided for solving the problems in the fields of energy, environment, medical treatment and the like.

The invention belongs to the technical field of bio-based polyurethane functional composite materials, and relates to a preparation method and application of a cellulose / polyurethane functional composite material based on a Diels-Alder reaction, the preparation method comprises the following steps: mixing furan functionalized cellulose nanofibers with maleimide-terminated waterborne polyurethane, and carrying out copolymerization through the Diels-Alder reaction to obtain the cellulose / polyurethane functional composite material based on the Diels-Alder reaction. The cellulose / polyurethane functional composite material is prepared. Compared with the prior art, the method has the advantages that a reversible dynamic covalent network is generated through Diels-Alder reaction to endow the material with self-healing and recoverability, so that the material realizes self-healing under temperature fluctuation, the service life is prolonged, the sustainability is improved, and the problem of poor compatibility of biomass components and a polyurethane matrix in a traditional mixing method is solved; the cellulose nanofiber / polyurethane composite material is endowed with good mechanical properties, high-temperature strength and low-temperature toughness.

The invention discloses a high-impact polyphenylsulfone composite material and a preparation method thereof, and relates to the technical field of polymer materials. When preparing the high-impact polyphenylsulfone composite material, the present invention reacts 3-mercapto-1,3-propylene glycol and 4-mercaptophenyl boric acid to obtain bis-mercapto borate; reacts 3-mercapto-1-propylamine and 2-pyridine formaldehyde and then reacts with copper acetate to obtain a pyridine Schiff base copper complex; 4,4'-difluorodiphenyl sulfone, decafluorodiphenyl sulfone, biphenyl diphenol, 2,2'-diallyl bisphenol A are polycondensed to obtain functionalized polyphenylsulfone; nano-montmorillonite is sequentially reacted with copper nitrate and allyl triethoxysilane to obtain modified montmorillonite; functionalized polyphenylsulfone, modified montmorillonite, bis-mercapto borate, and pyridine Schiff base copper complex are mixed and then injection molded to obtain a high-impact polyphenylsulfone composite material. The high-impact polyphenylsulfone composite material prepared by the present invention has excellent self-repairing, impact resistance, antibacterial and hydrophobic properties.

The invention relates to hydrogel beneficial to wound healing and a preparation method thereof. The hydrogel comprises chitosan and polyamino acid, and the mass ratio of the chitosan to the polyamino acid is (5: 1)-(1: 2); the mass of the mixed solution accounts for 70%-98% of the total mass. According to the technical scheme, the PRP / chitosan / polyamino acid three-network hydrogel is formed, the infectious wound inflammation microenvironment can be doubly adjusted, and the hydrogel has good mechanical performance and self-healing performance and is suitable for being applied to wounds. Most importantly, the hydrogel not only can inhibit bacteria and shorten the inflammation period, but also can supplement repair factors and accelerate the repair period.

The invention relates to the technical field of barrier films, and particularly discloses an ultrahigh water and oxygen barrier film for a vehicle-mounted OLED display product. The thickness of the ultrahigh water and oxygen barrier film is 15-35 microns, and the ultrahigh water and oxygen barrier film sequentially comprises a first antistatic layer, a first barrier layer, an OLED working layer, a second barrier layer, a polyethylene glycol terephthalate layer and a second antistatic layer, the thickness ratio of the first antistatic layer to the first barrier layer to the OLED working layer to the second barrier layer to the polyethylene glycol terephthalate layer to the second antistatic layer is (2-4): (2-4): (8-16): (2-4): (4-8): (2-4). The first barrier layer and the second barrier layer are prepared from the following raw materials in parts by mass: 1-2 parts of cholesterol, 5-15 parts of phospholipid, 1-2 parts of N-acryloyl glycinamide, 1-2 parts of graphene oxide, 0.01-0.1 part of a photoinitiator, 1-2 parts of hydroxypropyl methyl cellulose, 1-5 parts of fluorinated ethylene propylene, 1-5 parts of tetra-n-butyl titanate and 1-2 parts of a surfactant.

The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, acrylic acid is grafted on the surfaces of pretreated polypropylene particles to prepare modified polypropylene particles; coating sodium metasilicate with sodium alginate to prepare a self-repairing microcapsule; the preparation method comprises the following steps: hydrolyzing 3-glycidyl ether oxypropyl trimethoxy silane, and grafting the hydrolyzed 3-glycidyl ether oxypropyl trimethoxy silane on the surface of silicon dioxide to prepare modified silicon dioxide; mixing the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers to obtain a solid functional component; cement, slag powder, silica fume, an expanding agent, a solid functional component, modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, gravel and the pre-wetted self-repairing microcapsule are mixed, and the polymer-based anti-crack concrete is prepared. The polymer-based anti-crack concrete prepared by the invention has excellent anti-crack, freeze-thaw-resistant and self-repairing properties.

The invention provides a self-repairing long-acting anticorrosive coating material as well as a preparation method and application thereof, and relates to the technical field of anticorrosive paint preparation. The coating material is prepared from the following raw materials in parts by mass: 50 to 70 parts of bio-based polyurethane, 10 to 20 parts of microcapsules, 5 to 15 parts of nano filler and 5 to 10 parts of auxiliaries, according to the microcapsule, an isocyanate mixture serves as a core material, hexamethylene diisocyanate serves as a wall material, and the isocyanate mixture comprises a prepolymer generated through a reaction of lignin and hydrogenated xylylene diisocyanate and excessive hydrogenated xylylene diisocyanate in the reaction. The method for preparing the self-repairing long-acting anti-corrosion coating material is simple and convenient to operate and easy for industrial production, can remarkably improve the anti-corrosion performance of the base material, reduce the maintenance cost and prolong the service life in practical application, and has a wide market application prospect.

The invention discloses self-repairable castor oil-based polyurethane as well as a preparation method and application thereof. The molecular structure of the castor oil-based polyurethane contains castor oil-based silane (SCO) which is a dual cross-linking agent, and the polyhydroxy structure of castor oil forms internal cross-linking in the synthesis process, so that the mechanical property of the polyurethane is enhanced; a large number of siloxane groups introduced by a CO side chain are hydrolyzed in the film forming process of castor oil-based polyurethane (DSCPU) to form silicon hydroxyl (Si-OH), then the silicon hydroxyl (Si-OH) is condensed to form a Si-O-Si structure, and polysiloxane is formed in the polyurethane to achieve the effect of a reinforcing agent; the double cross-linked structure and the organic-inorganic hybrid structure are superposed, so that the mechanical properties, water resistance, heat resistance and the like of the DSCPU can be effectively enhanced. The preparation method of the castor oil-based polyurethane is simple in process, low in cost and capable of realizing large-scale production, and the prepared polyurethane material can be applied to multiple fields such as biomedical materials, building materials, automobile interior and exterior ornaments, electronic equipment, textiles and coatings.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a polyurethane elastomer material and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving and reacting 1, 4-benzene diboronic acid and a polyfunctional group amine compound at room temperature through a solution reaction to form a rigid eight-membered ring intramolecular boron-nitrogen coordination micromolecule NCBW-X; s2, polyester (polycaprolactone, polybutylene terephthalate, polylactic acid and the like) or polyether (polytetrahydrofuran, polypropylene ether polyol and the like) and diisocyanate (isophorone diisocyanate, toluene diisocynate and the like) react in a dry solvent at 80 DEG C by using a catalyst to form a prepolymer; hydrazide and NCBW-X are added into the obtained prepolymer for chain extension; the water resistance and the acid and alkali resistance of the material are enhanced through the boron-nitrogen coordination structure characteristic; and the prepared polyurethane elastomer material has very strong self-repairing efficiency and environmental adaptability.

The invention belongs to the field of synthesis and preparation of high polymer materials, and relates to a polymer network hybrid material containing disulfide bonds and ether bonds as well as a preparation method and application of the polymer network hybrid material. The polymer network hybrid material is composed of a polydisulfide chain segment, a polyether chain segment and coordination metal ions, a polydisulfide chain segment and a polyether chain segment are connected through a carboxylic ester covalent bond to form a covalent cross-linked network, and part of lateral carboxyl groups of the polydisulfide chain segment and coordination metal ions form a dynamic coordination cross-linked network through coordination bonds. According to the polymer network hybrid material containing the disulfide bond and the ether bond, the network structure is jointly constructed by a hydrogen bond, a metal ion coordination bond and a stable ester group donor bond, and a polydisulfide compound chain segment containing a high disulfide bond content and a hydrophilic carboxyl side group and a hydrophobic polytetrahydrofuran chain segment with good flexibility are organically combined; the material is endowed with excellent antibacterial performance and self-repairing performance.

The invention discloses guar gum hydrogel with biological activity and a preparation method and application thereof, and the preparation method comprises the following steps: adding tannic acid and a soluble ferric iron source into a guar gum solution, then adding a cross-linking agent, and carrying out a cross-linking reaction to obtain the guar gum hydrogel with biological activity. The hydrogel disclosed by the invention has good mechanical properties and self-repairing performance, can effectively prevent the hydrogel from being damaged and torn, avoids wound infection, is beneficial to providing a good repairing environment for wounds, and is beneficial to improving the healing effect of the wounds by integrating lysine with biological activity into guar gum hydrogel. The biocompatibility of the guar gum hydrogel is improved, and the capacity of promoting the healing of infected wounds is improved.

The invention belongs to the field of piezoelectric materials, and discloses self-repairing piezoelectric hydrogel as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving hyaluronic acid in water, adding sodium periodate, and carrying out a light-shielding reaction, dialysis and freeze drying to obtain formylated hyaluronic acid; the preparation method comprises the following steps: preparing a hydroformylated hyaluronic acid solution, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide to carry out activation reaction, grafting dopamine hydrochloride, dialyzing and freeze-drying to obtain dopamine-hydroformylated hyaluronic acid, and preparing a dopamine-hydroformylated hyaluronic acid solution; mixing the dopamine-aldehyde hyaluronic acid solution, the carboxymethyl chitosan solution and glycine crystals, and stirring at room temperature to form gel, so as to obtain the self-repairing piezoelectric hydrogel. The preparation method is simple, easy to operate and mild in gel forming condition, and the prepared hydrogel has good piezoelectric, self-repairing and adhesion functions and can be applied to preparation of bioelectrical stimulation piezoelectric materials.

The invention belongs to but not limited to the technical field of hydrogel, and particularly relates to a processing method of tough, transparent and adhesive supramolecular hydrogel, which comprises the following steps: step 1, preparing a supramolecular hydrogel precursor with a specific shape; step 2, dissolving the prepared precursor in water; step 3, freezing under a low-temperature condition; step 4, standing the frozen supramolecular hydrogel in air or dry inert gas; step 5, cutting and folding the obtained hydrogel, and processing the hydrogel into another shape; and 6, swelling the processed hydrogel in an acid-containing nutrient solution to obtain the final hydrogel. By adopting a supramolecular strategy and utilizing a high-density supramolecular network formed by tannic acid (TA) and polyvinyl alcohol (PVA), the mechanical property, transparency and adhesiveness of the hydrogel are remarkably improved.

The invention relates to the technical field of biomass materials and antibacterial materials, and discloses novel antibacterial peptide molecule reinforced biomass antibacterial hydrogel and a preparation method thereof.The preparation method comprises the steps that a, aldehyde hyaluronic acid AHA is synthesized, specifically, aldehyde modification is conducted on hyaluronic acid molecules so as to facilitate a cross-linking reaction between the hyaluronic acid molecules and chitosan quaternary ammonium salt QCS and antibacterial polypeptide molecules; step b, synthesis of chitosan quaternary ammonium salt / hydroformylated hyaluronic acid / antibacterial polypeptide AHA / QCS / epsilon-LP composite antibacterial hydrogel: preparing the biomass antibacterial hydrogel through interaction and cross-linking reaction between molecules; according to the preparation method, the antibacterial peptide and biomass molecules are effectively connected by utilizing intermolecular interaction and cross-linking reaction; the formed antibacterial hydrogel can regulate and control the release rate of antibacterial peptide molecules to realize a continuous antibacterial effect; meanwhile, the antibacterial hydrogel can form a protective film on a wound part, so that a moist environment is kept while bacteria are killed, and cell regeneration and wound repair are facilitated.

The invention provides a pure silicon negative electrode for an all-solid-state battery and a preparation method thereof, the pure silicon negative electrode comprises a current collector and a coating, the coating comprises a self-healing binder, a conductive polymer and pure silicon particles, and the preparation method comprises the following steps: mixing the self-healing binder with a first solvent to obtain a first glue solution; mixing a conductive polymer with a second solvent to obtain a second glue solution; mixing the first glue solution with the second glue solution to obtain a third glue solution; adding pure silicon particles into the third glue solution and grinding to obtain negative electrode slurry; and combining the negative electrode slurry with a current collector, and performing vacuum drying to obtain the pure silicon negative electrode. The invention can solve the problem that the pure silicon negative electrode of the all-solid-state battery prepared by the existing method is difficult to realize stable long circulation.

The invention discloses a Si / C negative electrode water-based binder for a lithium ion battery and a preparation method of the Si / C negative electrode water-based binder. The invention relates to a lithium ion battery Si / C negative electrode water-based binder, which is a polyacrylic acid-based cationic water-based polyurethane binder, and is formed by bonding a cationic water-based polyurethane emulsion with a thermal reversible self-repairing function and a polyacrylic acid aqueous solution through hydrogen bonds, ionic bonds and covalent ester bonds, the mass ratio of polyurethane to polyacrylic acid is (15: 1)-(4: 1). The aqueous binder provided by the invention can effectively inhibit the expansion of negative silicon-based particles in the charging and discharging process, keeps the stability of an electrode structure, and has excellent first coulombic efficiency and good battery cycle stability.