132 results about "Double network" patented technology

The invention discloses a method for in-situ rapid growth of a dual-network hydrogel coating on the surface of a base material by a one-step method, which comprises the following steps: putting the base material with an adhesion initiation layer on the surface into a hydrogel precursor solution, and carrying out in-situ polymerization for 0.1-10 minutes under light irradiation, wherein the adhesion initiation layer comprises an adhesive compound based on a catechol group and a first photoinitiator, and the hydrogel precursor solution comprises a natural polymer containing tyrosine, an acrylic monomer, a cross-linking agent and a second photoinitiator, and wherein the first photoinitiator and the second photoinitiator are different from each other and are independently selected from a divalent ruthenium compound and a persulfate. Compared with the prior art, the natural / synthetic polymer double-network gel coating with biological activity and mechanical property can grow on the surfaces of different substrates more quickly and efficiently through a one-step method; and the base material, the surface of which is modified by the in-situ grown double-network hydrogel coating, obtained by the method can be applied to in-vivo medical apparatuses and instruments.

The invention provides multifunctional bionic hydrogel as well as preparation and application thereof in traumatic brain injury treatment, and belongs to the field of biomedical materials. The preparation method comprises the following steps: combining polydopamine modified hemoglobin nanoparticles with curcumin-based carbon quantum dots with anti-inflammatory activity, and embedding into bionic hyaluronic acid-collagen double-network hydrogel, so as to prepare the multifunctional bionic hydrogel. The hydrogel can effectively relieve neuron hypoxia, reduce apoptosis, promote the polarity of microglial cells to be converted into anti-inflammatory phenotype, and significantly down-regulate the expression of S100A8, thereby inhibiting pathological neural immune crosstalk. In a traumatic brain injury model, hydrogel implantation improves the pathological microenvironment, enhances endogenous nerve regeneration, and ultimately results in significant neurological function and cognitive recovery. The multifunctional bionic hydrogel prepared by the invention has a good application prospect in preparation of materials for preventing and / or treating traumatic brain injury.

This invention discloses a composite hydrogel based on a polysaccharide-based hybrid dual network, its preparation method, and its applications, belonging to the field of marine polysaccharide technology. Based on the important role of amorphous calcium phosphate, a precursor in biomineral formation, in mineralization, this invention prepares a multifunctional composite hydrogel with wet bonding, antibacterial, and remineralization functions. This composite hydrogel can achieve rapid and convenient repair of enamel demineralization. This invention prepares oxidized sodium alginate via an alcohol-aqueous phase using the sodium periodate method. Sodium alginate reacts with carboxymethyl chitosan and dopamine through a Schiff base reaction to form dynamic imine bonds, thus preparing an in-situ self-crosslinking hydrogel. Simultaneously, amorphous calcium phosphate is introduced for secondary crosslinking, preparing a dense dual-network composite hydrogel. The composite hydrogel prepared by this invention has an interconnected three-dimensional porous structure, stable mechanical properties, and uniformly dispersed amorphous calcium phosphate in the form of nanospheres. The composite hydrogel prepared by this invention provides an integrated strategy with clinical translational potential for orthodontic enamel demineralization, with broad market prospects.

The invention relates to the technical field of composite films, and particularly discloses a high-fastness colored high-brightness composite film packaging material manufacturing process which comprises the steps of S1, base film preparation and pretreatment, S2, surface activation treatment, S3, colored coating preparation, S4, coating, S5, gradient drying and curing and S6, curing. Through corona and twice plasma treatment of different gases, oxygen-containing, amino and fluorine-containing groups are synergistically introduced to the surface of a base membrane, the chemical bonding and hydrogen bonding effects of a coating and the base membrane are enhanced, a composite system of epoxy resin, hydroxy acrylic resin and polyurea resin is adopted, and modified carbon black with the aminated surface is matched, so that the coating has a good anti-corrosion effect on the surface of the base membrane. Under the action of a catalyst and a cross-linking agent, a compact chemical cross-linking and hydrogen bond physical cross-linking dual-network structure is formed; and gradient heating drying and low-temperature curing processes are combined, so that stable volatilization of the solvent and full and complete cross-linking reaction are ensured, and the adhesive force and wear resistance of the base film and the coating layer are effectively improved.

The invention discloses a carbon fiber polyester composite felt and a preparation method thereof, and relates to the technical field of high polymer materials, and the preparation method comprises the following steps: (1) carbon fiber directional activation; (2) in-situ grafting of sheath-core monofilaments; (3) dual-network synchronous lapping; and (4) node in-situ thermal consolidation. According to the preparation method disclosed by the invention, a carbon fiber polyester composite felt preparation system without an additional binder is constructed by sequentially implementing four steps of processes of carbon fiber directional activation, skin-core monofilament in-situ grafting, dual-network synchronous lapping and node in-situ thermal consolidation, and molecular-level synergistic combination of carbon fibers and polyester components is realized. The interface bonding strength and structural integrity of the composite felt can be remarkably improved, and meanwhile, the mechanical bearing stability of the composite felt is improved, so that the problems that in the prior art, carbon fibers and a polyester matrix are poor in interface compatibility, layering and falling are prone to occurring, and the service life is short can be solved. And the problems that the mechanical property of the composite felt is reduced, the preparation process is complicated and the environmental protection property is insufficient due to the need of adding an external binder are solved.

The present application relates to the technical field of oil exploitation, in particular to a profile control water plugging agent, a preparation method and application thereof. The method comprises the following steps: (1) mixing a cellulose compound, acrylamide and water, then adding a crosslinking agent, and then adding an initiator to perform a polymerization reaction; (2) mixing the material obtained in the step (1) with a metal salt solution, and then performing solid-liquid separation and drying; wherein the cellulose compound is selected from one or more than two of carboxymethyl cellulose, carboxyethyl cellulose and polyanionic cellulose. The profile control water plugging agent is a hydrogel material with a unique double network structure, and has good stability and still maintains good strength under high temperature and high salt conditions.

The application provides a poly(dimethyl diphenyl imide) siloxane / phenolic based double network hybrid resin and a preparation method and application thereof, and belongs to the field of advanced material technology. The application firstly provides a copolymer for preparing an ablative thermal protection hybrid resin, and the structure of the copolymer is shown as formula I. Then, the hybrid resin prepared from the copolymer is provided. The copolymer shown as formula I and the phenolic resin in the hybrid resin of the application have good compatibility, and the copolymer is uniformly distributed in the phenolic resin; and the hybrid resin is graphitized and ceramized in the ablative process, and has excellent ablative resistance. The application provides a new idea and method for preparing a new ablative resistant hybrid phenolic resin through copolymerization, and a new ablative resistant hybrid resin which is expected to meet the increasingly severe flight environment in the future is prepared.

The invention provides a preparation method of algae-based pure plain leather based on a dual-network gel system. According to the method, natural polysaccharide sodium alginate extracted from seaweed and xanthan gum obtained through microbial fermentation are used as raw materials, and a cross-linking reaction of the raw materials is accurately regulated and controlled to form a double-network structure formed by cross-linked alginate serving as a rigid network and a flexible xanthan gum hydrogen bond network; and the material is reinforced and toughened by utilizing the synergistic complementary characteristics of the two, and the size and deformation stability are kept. Meanwhile, the leather tanning fat liquoring principle is used for reference, and natural grease is introduced, so that the softness and durability of the material are effectively improved. According to the method, natural and renewable polysaccharide resources are adopted, animal components are not contained, and animal ethical problems and use of harmful chemicals are avoided. The method has the advantages of simple process, abundant raw materials, low cost, excellent mechanical properties of pure plain leather products, short production period, large-scale industrial production and wide market prospect, and particularly has the potential of becoming a green and environment-friendly substitute material in the fields of fashion and furniture.

Four-arm polyethylene glycol amine and preparation method and application thereof, relate to the technical field of high polymer materials, and solve the problem of poor comprehensive performance such as strength, fatigue resistance and swelling resistance when the traditional double network hydrogel is applied to the preparation of cartilage repair materials in the prior art. The four-arm polyethylene glycol amine provided by the application has a molecular weight of 10 kDa or 40 kDa. Four-arm polyethylene glycol, phthalimide, diisopropyl azodicarboxylate and triphenylphosphine are subjected to Mitsunobu reaction and hydrazinolysis to obtain four-arm polyethylene glycol amine with a molecular weight of 10 kDa. Four-arm polyethylene glycol, phthalimide, diisopropyl azodicarboxylate and triphenylphosphine are subjected to Mitsunobu reaction and hydrazinolysis to obtain four-arm polyethylene glycol amine with a molecular weight of 40 kDa. The double network hydrogel prepared from the four-arm polyethylene glycol amine has excellent comprehensive performance such as high mechanical strength, fatigue resistance, self-recovery and swelling resistance, and can be applied to the preparation of cartilage-like materials.

The application discloses a preparation method and application of a sodium alginate-cyperus esculeus protein / isolated whey protein double-network gel, and comprises the following steps: step 1, mixing cyperus esculeus protein, isolated whey protein and sodium alginate to prepare a compound; and step 2, adding gluconic acid-delta-lactone and calcium carbonate into the compound to promote gel formation, so as to obtain a sodium alginate-cyperus esculeus protein / isolated whey protein compound gel induced by calcium acetate coordination. Compared with a pure protein gel, the sodium alginate-cyperus esculeus protein / isolated whey protein compound gel has excellent performances in texture characteristics, rheological characteristics and the like, and the water retention of the compound gel is also better than that of the pure protein gel. Moreover, the double network has a good encapsulation rate for curcumin and has a good slow-release effect.

This invention provides a wide-temperature-range, long-life flexible zinc-lithium hybrid ion battery hydrogel electrolyte, its preparation method, and its application. The hydrogel electrolyte comprises a polymeric hydrogel framework and an electrolyte phase adsorbed and filled within the framework. The polymeric hydrogel framework is an interpenetrating double network structure formed by sodium alginate and polyacrylamide. The electrolyte phase comprises a mixed solvent, an electrolyte salt, and functional additives. The mixed solvent consists of water and a co-solvent. The electrolyte salt is zinc trifluoromethanesulfonate and lithium trifluoromethanesulfonate. The functional additives are alkali metal salts or rare earth metal salts. This invention, through the synergistic design of a zinc-lithium dual-salt system, an organic co-solvent, and trace amounts of rare earth functional additives, simultaneously achieves low-temperature antifreeze, dendrite suppression, and side reaction suppression in a zinc-lithium hybrid ion battery, thereby significantly improving the battery's wide-temperature-range cycle life and other electrochemical performance.

The application discloses an ultra-high molecular weight polyethylene non-woven fabric modified based on liquid metal and MXene and a preparation method thereof, and belongs to the technical field of protective functional textile composite materials. After the ultra-high molecular weight polyethylene non-woven fabric is pretreated through hydrophilic modification, a composite coating material composed of magnetic liquid metal formed by iron powder and liquid metal gallium and MXene is sprayed, then the liquid metal is spread between fibers and bridges MXene and iron powder through rolling treatment, a continuous conductive / magnetic double network is formed, a packaging layer is coated at last, and the ultra-high molecular weight polyethylene non-woven fabric modified based on liquid metal and MXene is obtained. The finishing process of spraying combined with rolling is simple, low in cost and easy to be industrialized; the prepared ultra-high molecular weight polyethylene non-woven fabric modified based on liquid metal and MXene has an electromagnetic shielding efficiency greater than 35 dB in the X wave band, meanwhile, excellent characteristics such as flexibility and wear resistance are maintained, and the unification of light weight and high performance is realized.

The invention discloses a flexible ionic thermal battery and a preparation method thereof, the flexible ionic thermal battery comprises an ionic gel electrolyte and asymmetric electrodes, and the asymmetric electrodes are an activated carbon fiber cloth cathode and a polyaniline anode; the activated carbon fiber cloth cathode is obtained by activating carbon fiber cloth with a mixed solution of concentrated nitric acid and concentrated sulfuric acid; the ionic gel electrolyte is obtained by soaking acrylamide and acryloyloxyethyl trimethyl ammonium chloride dual-network gel in an electrolyte solution of FeCl3 / HCl. According to the flexible ionic thermal battery disclosed by the invention, a built-in potential field is constructed under a near-isothermal condition through electrode-electrolyte interface reaction characteristic difference, and decoupling of dependency of the potential field and a temperature field in a traditional quasi-solid-state ionic thermal battery is realized, so that the ionic thermal battery can finish thermal charging through near-isothermal temperature rise in an ultrathin form within 1mm, and the flexible ionic thermal battery has a wide application prospect. And stable discharge output is realized in a constant-temperature stage.

The invention discloses a preparation method of a self-crosslinking injectable dual-network OXG-CS-Gel composite hydrogel, which comprises the following steps: dissolving oxidized xanthan gum in ultrapure water to obtain an oxidized xanthan gum solution, dissolving gelatin in ultrapure water to obtain a gelatin solution, dissolving chitosan in an acetic acid solution, stirring at room temperature until complete dissolution to obtain a chitosan solution, and carrying out freeze drying to obtain the self-crosslinking injectable dual-network OXG-CS-Gel composite hydrogel. The preparation method comprises the following steps: adding a chitosan solution into an oxidized xanthan gum solution, uniformly stirring to obtain an OXG-CS solution, then adding a gelatin solution, uniformly stirring to obtain an OXG-CS-Gel solution, and standing to form gel to obtain OXG-CS-Gel composite hydrogel; the composite hydrogel obtained by the invention is formed by a dynamic Schiff base bond and a hydrogen bond, has excellent self-crosslinking capability, self-healing performance, injectable performance and swelling performance, overcomes the defects that the traditional hydrogel is complex in gelling process, needs a cross-linking agent for cross-linking and the like; and a new material is provided for the fields of minimally invasive injection, wound healing, hemostatic materials, targeted drug delivery and the like.

The application discloses a polyvinyl alcohol film and a preparation method and application thereof. The material of the polyvinyl alcohol film comprises a main material and an auxiliary material. The main material is polyvinyl alcohol, and the auxiliary material is a water-soluble high polymer material. The average polymerization degree of the water-soluble high polymer material is 2-10 times of the average polymerization degree of the polyvinyl alcohol. The polyvinyl alcohol film is modified by forming a high polymer double network. The water-soluble high polymer material with a high polymerization degree, whose average polymerization degree is 2-10 times of the average polymerization degree of the polyvinyl alcohol, is added into the polyvinyl alcohol, so that a high polymer double network structure with the polyvinyl alcohol as the main body is obtained. The tensile property of the polyvinyl alcohol film is greatly improved, and the thinness of a polarizing film with the polyvinyl alcohol film as an optical base film and the optical property of the polarizing film are improved.

The invention relates to the field of ionic gel gas separation membranes, and discloses an ionic gel gas separation membrane as well as a preparation method and application thereof. The ionic gel gas separation membrane comprises a double network and ionic liquid, wherein the first network is a cross-linked polymer containing imine bonds, and the second network is a free radical polymerization cross-linked polymer containing quadruple hydrogen bonds. Under the synergistic effect of dual networks, the ionic gel gas separation membrane has good mechanical performance and rapid self-repairing performance after damage, and rapid and effective separation of CO2 / N2 gas is achieved.

The invention discloses a preparation method and application of a swelling-inhibiting dual-network membrane, and the method comprises the following steps: (1) putting chloromethylated polysulfone and tetramethylethylenediamine into a NaOH solution for pre-crosslinking to obtain a crosslinked chloromethylated polysulfone solution; (2) mixing the cross-linked chloromethylated polysulfone solution with the sulfonated polyetheretherketone solution, stirring at 60-80 DEG C for 2-4 hours, then cooling to 40-50 DEG C at a rate of 5-10 DEG C / h, and stirring at a constant temperature for 8-12 hours to obtain a membrane casting solution; and (3) drying the membrane casting solution to prepare the swelling-inhibiting dual-network membrane. According to the invention, through precise regulation and control of covalent cross-linked network density and directional optimization of a blended microphase structure, synergistic improvement of swelling inhibition, efficient ion conduction, excellent mechanical properties and zinc dendrite resistance is synchronously realized in a strong alkaline environment.

The invention relates to the field of food preservation, and discloses a food-grade long-acting preservative based on a seaweed extract and a process thereof, the preservative is prepared from organic and inorganic hybrid antibacterial micro powder, epoxidized soybean oil and low-density polyethylene or polypropylene carrier resin; the micro powder is prepared by constructing a compact dual network by utilizing zinc ion coordination cross-linking and polylysine electrostatic complexing, stably embedding epigallocatechin gallate and performing spray drying. The process comprises the following steps: inducing epoxidized soybean oil to be grafted on the surface of micro powder in situ by adopting a high-speed shearing heat effect for hydrophobic modification, and then melting, extruding and granulating with resin. By means of hybrid network construction and interface grafting technologies, the problems that natural active ingredients are poor in heat resistance and uneven in dispersion in a hydrophobic matrix are effectively solved, stable and long-acting slow release of antibacterial components is achieved, and the antibacterial packaging film has the advantages of being broad in spectrum, efficient, safe, non-toxic, excellent in processing performance and the like and is suitable for fresh-keeping packaging of various foods.

The invention discloses a preparation method of fiber-nanowire double-network SiBCN ceramic aerogel, and belongs to the field of high-temperature-resistant thermal protection materials. The method comprises the following steps: respectively hydrolyzing an organic silicon source, a carbon source and triethanolamine borate, mixing, catalyzing gel in situ by utilizing alkalescence of boron-nitrogen sol, and combining supercritical drying and high-temperature heat treatment processes. Carbon sources such as carbosilane are introduced to regulate and control a network structure, and high-temperature heat treatment is combined to induce in-situ growth of nanowires with a high length-diameter ratio in the aerogel. The nanowires are interwoven in an aerogel particle network in an interpenetrating manner, the nanowires and the macroscopic fiber felt jointly construct a'macroscopic fiber-microcosmic nanowire 'dual-network enhancing system, qualitative change of a microcosmic skeleton from'particle accumulation' to'nanowire interweaving 'is realized, and a brand new technical solution is provided for structural safety guarantee in an extreme environment.

The present application relates to the technical field of solar interface evaporation, in particular to a light-vapor conversion composite hydrogel sponge and a preparation method and application thereof.The present application provides a preparation method of a light-vapor conversion composite hydrogel sponge, comprising: mixing carbonized coffee powder, sodium alginate and a solution containing lignin-coated nano-silver particles to obtain a mixed solution, soaking polyurethane sponge in the mixed solution, taking out the polyurethane sponge after absorbing the mixed solution, adding calcium chloride, and drying to obtain the light-vapor conversion composite hydrogel sponge.The present application combines biomass waste coffee grounds and lignin-reduced silver to construct a light-vapor conversion composite hydrogel sponge with low water evaporation enthalpy, high thermal efficiency, stable water supply and cyclic stability on the double network of polyurethane and hydrogel.

The invention discloses an adhesion-drug release collaborative design system and method of adhesion type hydrogel, which are applied to the field of biomedical materials. A gradient cross-linking density and dynamic dual-network synergistic adhesion mechanism, a pH responsive nanopore channel of a drug sustained-release layer and a molecularly imprinted chain segment synergistic controlled-release mechanism, and a micro-breathable structure of a bionic cuticle barrier membrane and a zwitter-ion anti-adhesion surface synergistic protection mechanism are constructed; collaborative optimization of triple properties of adhesion self-enhancement in a wet environment, intelligent drug release and low skin irritation is realized; the method does not depend on traditional single function layer stacking or static parameter regulation and control, and starts from three dimensions of material microstructure design, interface coupling relation construction and dynamic response mechanism implantation to establish a set of multi-level collaborative design process capable of being implemented in an engineering mode. The finally formed hydrogel application product can maintain stable adhesive force in a complex physiological environment, at the same time releases treatment components as required, and reduces interference to a skin barrier function to the maximum extent.

The invention relates to the technical field of biomedical materials, in particular to a double-network hydrogel material for bionic cartilage and subchondral bone and a preparation method of the double-network hydrogel material. According to the double-network hydrogel material for the bionic cartilage and the subchondral bone, polyvinyl alcohol is adopted as a first network skeleton, and a high-toughness hydrogel structure is formed through a circulating freezing and thawing method; sulfobetaine methacrylate and a calcium chloride solution are introduced as a second network cross-linking system, so that the material is endowed with excellent hydrophilic lubrication performance; furthermore, liposome microspheres are compounded to form a self-renewal liposome boundary layer, so that the friction coefficient is remarkably reduced; the material has high strength, high toughness, low friction, self-lubrication and biocompatibility, is suitable for precise repair and functional reconstruction of osteochondral defects such as femoral head necrosis and the like, and has a wide clinical application prospect.

The application discloses a polyelectrolyte double-network hydrogel for bacterial infection wound healing and a preparation method and application thereof, and constructs a polyelectrolyte double-network hydrogel by introducing a quaternary ammonium salt modified chitosan cationic polyelectrolyte into a propylene monomer-co-sulfonate anion copolymer, wherein the quaternary ammonium carboxymethyl chitosan cationic polyelectrolyte is used as a first network, and the poly(propylene monomer-co-sulfonate) anionic polymer is used as a second network; the two polymer networks with opposite charges strongly interact with each other, and the mechanical property, the adhesion property and the antibacterial property of the polyelectrolyte double-network hydrogel are synergistically improved.

The application discloses a method for manufacturing plate from coconut shell fiber material, comprising pretreatment of coconut shell fiber raw material: crushing and screening waste coconut shell to obtain coconut shell fiber coarse material. The application adopts "steam explosion-alkali cooking" combined pretreatment to efficiently dissociate fibers and expose hydroxyl, significantly increasing fiber roughness, solving the problems of large fiber damage and difficult gluing in traditional process; using oxidized starch, nanocellulose and silane coupling agent to construct a "double network crosslinking" system, completely abandoning formaldehyde, and the water resistance and gluing strength are better than traditional starch glue; through "sandwich" paving structure and phytic acid modified lignin flame retardant, the unity of smooth surface, high strength core and overall flame retardation is realized, and the production cost is greatly reduced; gradient hot pressing combined with microwave assistance solves the problems of thick plate bubbling and delamination, and the solidification speed is fast; the introduction of nano aerogel and vacuum impregnated modified oil endows the plate with excellent heat preservation, heat insulation, waterproof and corrosion resistance.

The application provides an injectable hydrogel for endometrial repair and / or prevention of adhesion of uterine cavity and a preparation method and application thereof, and belongs to the technical field of biomedical materials. The injectable hydrogel is composed of a base gel and a decellularized matrix distributed in the base gel; the base gel is composed of a cross-linked carboxymethyl chitosan gel and a carbomer gel; the base gel has an interpenetrating or semi-interpenetrating double network structure; and the cross-linked carboxymethyl chitosan gel is a chemical cross-linked carboxymethyl chitosan gel. In the application, the injectable hydrogel forms a base gel with an interpenetrating or semi-interpenetrating double network structure by using a cross-linked carboxymethyl chitosan gel and a carbomer gel, and is compounded with a decellularized matrix, so that the injectable hydrogel has high elasticity and high adhesion, can effectively prevent adhesion and repair damaged tissues, has a long action time, and has good biocompatibility.

The invention provides novel phenol urea alkane resin and application thereof, and belongs to the technical field of casting, modified phenolic resin provided by the invention is obtained by modifying phenolic resin with alkyd resin, and in the modified phenolic resin, the content of the alkyd resin is 5-30%; the molecular weight of the alkyd resin is 1800-2300 Da, the modified phenolic resin is of a rigid-flexible complementary double-network structure, the two networks penetrate through each other, the 24-hour tensile strength of the sand core can be improved, meanwhile, the instant tensile strength is kept to be larger than or equal to 0.66 MPa, and the problem of sand angle falling of a large aluminum water jacket core is effectively solved.

The invention relates to the technical field of food processing, and discloses a preparation method of bean curd with a double-network structure, and the bean curd with the double-network structure is prepared from the following raw materials in parts by weight: a recombinant protein matrix and a composite coagulator, the recombinant protein matrix is an aqueous dispersion with the total protein concentration of 10% and contains 7S globulin and 11S globulin, and the mass ratio of the 7S globulin to the 11S globulin is (30: 70)-(35: 65); the final total ion concentration of the system is 0.15-0.25 mol / L due to the addition amount of the composite coagulator; the mass ratio of 7S globulin to 11S globulin in the recombinant protein matrix is 32: 68. By constructing a 7S / 11S double-network interpenetrating structure and performing variable-frequency ultrasonic coupling ion / pH gradient regulation and control, the high hardness, high elasticity and strong water binding capacity of the soybean protein gel are synergistically improved, and the dry matter utilization rate and the product homogeneity are improved.

The application discloses an organic-inorganic hybrid formaldehyde-free fixing agent and a preparation method and application thereof, and belongs to the technical field of textile auxiliaries. The fixing agent is prepared by using dimethyl diallyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride as reaction monomers, N-vinyl pyrrolidone as an organic modifier, and trisodium phosphate and bismuth nitrate as inorganic modifiers, and the organic-inorganic hybrid crosslinking structure is formed through a polymerization reaction. The preparation method comprises the following steps: pre-complexing bismuth nitrate and citric acid, pre-activating a silane coupling agent, mixing the components, and then performing stage pH regulation, ultrasonic-assisted dispersion, high-temperature curing and other steps. The fixing agent is prepared by means of coordination crosslinking of an organic polymer chain and bismuth ions and covalent connection of a silane coupling agent, so that a double network structure is formed, the wet rubbing fastness and the soaping fastness are significantly improved, the fabric is endowed with antibacterial and ultraviolet resistance functions, the hydrophilicity and the hand feeling are improved, and the fixing agent does not contain formaldehyde, and can be widely applied to post-treatment of textile dyeing.