201 results about "Quaternized chitosan" patented technology

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of linear low-density polyethylene, 12 to 18 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of nano silicon dioxide, 3 to 7 parts of organic montmorillonite, 1.5 to 3.5 parts of hindered amine light stabilizer, 1.5 to 2.5 parts of antioxidant 1010, 0.8 to 1.2 parts of calcium stearate, 0.8 to 1.2 parts of zinc stearate, 0.8 to 1.2 parts of silane coupling agent and 4 to 6 parts of maleic anhydride grafted polyethylene. The composite material is prepared from the following components in parts by weight: 1.5-3.5 parts of a quaternized chitosan-nano silver compound, 6-9 parts of a modified toughening agent, 4-7 parts of a modified heat-resistant agent, 1.5-3.5 parts of a processing aid, 0.15-0.35 part of dibenzoyl peroxide and 0.5-1.5 parts of a nucleating agent DBS. The composite material is excellent in comprehensive performance, high in strength, good in flexibility and puncture resistance, excellent in aging resistance, heat resistance, chemical resistance and antibacterial property, good in processability, capable of meeting the requirements of multiple fields such as packaging and agriculture, scientific in preparation method and high in practical value.

The invention relates to the technical field of cationic etherifying agents, and discloses a quaternary ammonium salt type cationic etherifying agent and a preparation method thereof.3-chloro-2-hydroxypropyl trimethyl ammonium chloride and sulfaguanidine modified quaternized chitosan are added into a reactor and stirred, and the quaternary ammonium salt type cationic etherifying agent is obtained. Quaternary ammonium salt, guanidyl and chitosan groups contained in the sulfaguanidine modified quaternized chitosan all have better antibacterial effects; wherein the quaternary ammonium salt is adsorbed to the surfaces of bacteria, and hydrophobic groups are inserted into lipoid layers, so that the permeability of cell membranes is changed, the membrane structure is destroyed, intracellular substances are leaked, and the bacteria are dead; guanidyl can be combined with protein and nucleic acid in bacterial cells to interfere the normal metabolic process of bacteria and further inhibit growth and reproduction of the bacteria, so that a natural antibacterial effect is achieved; and the chitosan group has a relatively good antibacterial effect.

The invention relates to the technical field of activated carbon materials, and discloses an activated carbon material for adsorbing organic gas and a preparation method thereof.The preparation method includes the steps that activated carbon powder, epoxidized cardanol, graphene oxide modified quaternized chitosan, bentonite and nanometer titania are added into grinding equipment to be ground, and a primary material A is obtained; and then continuously adding a water-borne epoxy resin adhesive and water, stirring and drying to obtain the active carbon material for adsorbing the organic gas. Chitosan in the silane modified chitosan structurally contains amino, hydroxyl and other polar groups, so that organic gas can be adsorbed; the graphene also has a relatively good adsorption effect on organic gas, and meanwhile, the agglomeration effect of the graphene is reduced; and siloxane and quaternary ammonium salt groups contained in the adsorbent also have a relatively good adsorption effect on organic gases. Cardanol in epoxidized cardanol contains functional groups such as benzene rings, phenolic hydroxyl groups and long-chain alkanes, and the functional groups endow the cardanol with various reaction activities and can absorb organic gas.

The invention relates to the field of sponge materials, and provides an antibacterial degradable sponge material and a preparation method thereof. The material is prepared from protocatechuic acid modified quaternized chitosan, quaternary ammonium salt grafted gelatin, sodium alginate, polyhydroxybutyrate, polycaprolactone, a polylactic acid-glycolic acid copolymer, hexamethylene diisocyanate, a foaming agent, nano cellulose, vitamin E, polyethylene glycol, triethylamine and dimethylformamide. Protocatechuic acid and quaternized chitosan are subjected to amidation modification, and chitosan and gelatin are subjected to quaternization treatment by adopting 2, 3-epoxypropyl trimethyl ammonium chloride, so that the antibacterial property and biodegradability of the material are improved. In the material preparation process, through vacuum degassing, foaming vacuum degree and humidity control and a multi-step drying process, it is ensured that the average pore size of the material is uniform (50-200 microns) and the porosity is high (50%-90%), and the obtained material has excellent antibacterial property and degradability and has wide application value.

A preparation method of a double-network versatile hydrogel with antibacterial and drug sequential release capabilities is provided in the present disclosure, belonging to the technical field of biological corneas. The preparation method includes the following steps: mixing filipin protein-methacrylate, glycidyl methacrylate functionalized quaternized chitosan, polydeoxyribonucleotide, and lithium phenyl(2,4,6-trimethylbenzoyl) phosphinate with drug-loaded micelles, followed by cross-linking under irradiation of ultraviolet to construct a double-network versatile hydrogel with antibacterial and drug sequential release capabilities.

The invention relates to a pH-responsive aromatic nanocapsule as well as a preparation method and application thereof, and the pH-responsive aromatic nanocapsule comprises the following components in percentage by mass: 0.4-10% of modified SiO2, 0.2-30% of a core material, 10.2-16% of a quaternized chitosan / polydopamine wall material and the balance of water. The preparation method comprises the following specific preparation steps: preparing a modified SiO2 suspension, adding a core material, and carrying out homogeneous emulsification under a high-speed shearing machine to prepare a Pickering emulsion; preparing a quaternized chitosan / polydopamine wall material solution; and finally, carrying out isovolumetric blending on the Pickering emulsion and the quaternized chitosan / polydopamine wall material solution (grafting the quaternized chitosan / polydopamine wall material through the modified SiO2), and stirring to obtain the aromatic nanocapsule. Compared with the prior art, the preparation method has the advantages that the lavender essential oil is taken as a core material, the quaternized chitosan / polydopamine is taken as a wall material, and the modified SiO2 stable Pickering emulsion is taken as a template, so that the catechol-based self-adhesive nanocapsule with pH responsiveness is prepared. The nanocapsule is prepared by an emulsion template method, the preparation method is mild in condition, and the prepared nanocapsule is green and safe and has excellent adhesion and antibacterial properties.

The invention discloses a quaternized chitosan benzisothiazolinone derivative as well as a preparation method and application of the quaternized chitosan benzisothiazolinone derivative in efficient antibacterial performance. The derivative has a structure as shown in a formula 1. The preparation method comprises the following steps: reacting chitosan with glycidyl trimethyl ammonium chloride at 60-100 DEG C for 6-48 hours to obtain a product 1, namely hydroxypropyl trimethyl ammonium chloride chitosan (HACC); the preparation method comprises the following steps: reacting 1, 2-benzisothiazolin-3-one with sodium chloroacetate at the temperature of 110-140 DEG C for 12-36 hours to obtain a product 2: 2-(3-carbonyl benzo [d] isothiazole-2-(3H)-yl) acetic acid (BITCOOH); and reacting the product 1 with the product 2 under a neutral condition for 12-48 hours to obtain the quaternized chitosan benzisothiazolinone derivative (HACCBIT). The derivative has a broad-spectrum antibacterial property, and has a killing effect on a plurality of bacteria, such as staphylococcus aureus, escherichia coli, salmonella salmonella salmonella, lactobacillus paracasei, lysinibacillus sphaericus, acinetobacter lwoffii and the like, and the derivative can be used for killing a plurality of bacteria, such as the staphylococcus aureus, the escherichia coli, the salmonella salmonella salmonella, the lactobacillus paracasei, the lysinibacillus sphaericus, the acinetobacter lwoffii and the like.

The invention discloses tissue adhesion self-gel powder and a preparation method thereof, and belongs to the field of hydrogel. The preparation method comprises the following steps: firstly, modifying chitosan to obtain quaternized chitosan (QCS), and then grafting urushiol onto the QCS to obtain urushiol-gold quaternized chitosan (US-QCS); the preparation method comprises the following steps: reacting sodium hyaluronate (HA) with calcium salt to obtain calcium hyaluronate (Ca-HA); and mixing the US-QCS and the Ca-HA, so as to obtain US-QCS / Ca-HA self-gel powder. The tissue adhesion self-gel powder prepared by the invention can quickly absorb interface water and then adhere to tissues, various wounds can be blocked, wound healing is promoted, calcium ions in the powder can accelerate blood coagulation, and the powder has the potential ability of promoting bone repair.

The invention discloses a preparation method of an intelligent anti-icing material, which comprises the following steps: preparing a humidity response precursor of the intelligent anti-icing material by using quaternized chitosan and E44 epoxy resin as raw materials, and mixing a PDMS prepolymer A, porous SiO2 nanoparticles and silicone oil to prepare an oil storage functional precursor of the intelligent anti-icing material; mixing the intelligent anti-icing material humidity response precursor and the intelligent anti-icing material oil storage functional precursor, adding an amine curing agent T31, a PDMS curing agent B and a cross-linking agent, and performing cross-linking curing to obtain the intelligent anti-icing material. When the intelligent anti-icing material is sprayed on the power transmission line, continuity of liquid on the surface of the power transmission line can be destroyed, spreading of ice on the surface of the power transmission line can be inhibited, ice nucleation sites are greatly reduced, ice crystal nucleation is inhibited, release and recovery of a lubricating layer are controlled by utilizing humidity sensitivity of the intelligent anti-icing material, and in the freezing and thawing cycle, the anti-icing effect is good. The service life of the lubricating layer is prolonged, and the intelligent anti-icing effect under the complex environment change is achieved.

The invention relates to a super-absorbent paper diaper and a preparation method and application thereof.The super-absorbent paper diaper comprises a bottom film, a core layer, a surface layer and elastic side seals and is characterized in that the core layer is prepared from, by weight, 50-60 parts of acrylic water-absorbent resin, 20-30 parts of polyacrylamide microspheres, 20-30 parts of quaternized chitosan, 10-15 parts of modifier and 1-5 parts of catalyst; wherein the modifier is a composition of tartaric acid, 2-acrylamide-2-methylpropanesulfonic acid and N, N '-bis (acryloyl) cystamine in a mass ratio of 1: (2-3): (1-1.5). Wherein the acrylic water-absorbent resin provides basic water-absorbent capacity, the polyacrylamide microspheres enhance adsorption and prevent gel blockage, the quaternized chitosan improves antibacterial property and electrolyte adsorption capacity, the catalyst ensures that the reaction is fully carried out, and all the components of the modifier cooperate with one another to enhance hydrophilicity; the water absorption performance, the structural stability and the salt tolerance of the core layer are jointly improved.

The invention discloses a preparation method of a nanofiber membrane capable of adsorbing various perfluorinated and polyfluoroalkyl substances, which comprises the following steps of: obtaining a nanofiber membrane spun by mixing quaternized chitosan and polyvinyl alcohol by adopting an electrostatic spinning and glutaraldehyde crosslinking method, and directly immersing the nanofiber membrane into environmental water for use; short-chain perfluorocarboxylic acid, long-chain perfluorocarboxylic acid, short-chain perfluorosulfonic acid, long-chain perfluorosulfonic acid and perfluoroalkyl ether carboxylic acid in tap water, surface water, underground water, domestic sewage, industrial sewage, agricultural sewage or medical wastewater can be efficiently and simultaneously adsorbed and removed; various types of perfluoro and polyfluoroalkyl substances such as perfluoro nonoxybenzene sulfonates and chlorinated polyfluoroether sulfonates can be selected from various types of perfluoro and polyfluoroalkyl substances. And after adsorption removal is completed, taking out the wastewater from the environmental water to complete solid-liquid separation. Compared with an existing adsorbent, the adsorbent has the advantages that more types of perfluorinated and polyfluoroalkyl substances can be adsorbed and removed at the same time, the adsorption and removal efficiency on short-chain perfluorinated substances is higher, and the applicable environment water matrix is wider.

The invention provides a viscosity-controllable and low-toxicity polysaccharide-based antibacterial detergent and a preparation method thereof, and belongs to the technical field of daily chemical sterilization. The detergent comprises the following raw materials in percentage by mass: 0.5-6% of a polysaccharide thickener, 10% of a bacteriostatic agent, 10% of a glycoside nonionic surfactant and the balance of water, the polysaccharide thickening agent is a mixture of chitosan, chitosan hydrochloride and quaternized chitosan. The polysaccharide is applied to viscosity regulation and control of a surfactant system without a petroleum-based thickening agent for the first time, application of the polysaccharide in the field of daily chemical washing is expanded, and compared with other antibacterial hand sanitizer competitive products containing benzene rings and phenol bacteriostatic agents and 6501 thickening agents, the antibacterial hand sanitizer competitive products have the remarkable advantages of high biocompatibility, high antibacterial property, easiness in degradability and the like.

The invention relates to the technical field of composite hydrogel preparation, in particular to a nano composite hydrogel preparation process based on a microfluidic technology. The gel comprises the following components in parts by mass: 50-70 parts of a gel matrix, 5-9 parts of a nano enhancement system, 8-14 parts of a functional carrier, 3-6 parts of a dynamic response system, 4-7 parts of a hyaluronic acid-sulfhydrylated heparin compound and 0.5-1.5 parts of L-ascorbyl palmitate. Precise mixing and directional arrangement of all component materials on a micro-level are realized through a microfluidic technology, so that a nano reinforcing system and a functional carrier are uniformly distributed in a gel matrix, the synergistic effect of all the components is fully exerted, the mechanical property and the biological function of the gel are effectively improved, and the preparation method is suitable for industrial production. And quaternized chitosan nanofibers, a dynamic response system for responding to external environment change and a hyaluronic acid-sulfhydrylated heparin compound for promoting angiogenesis are introduced, so that the gel has the biological functions of resisting bacteria and promoting angiogenesis through a synergistic effect.

The invention discloses a rapid photo-crosslinking drug sustained release type multifunctional hydrogel corneal contact lens and a preparation method thereof. The preparation method comprises the following steps: (1) preparing quaternized chitosan, an acrylate monomer, methacrylic acid, a crosslinking agent and an initiator into a reaction mixed solution according to a ratio; (2) transferring the reaction mixed solution into a mold, carrying out an ultraviolet irradiation free radical polymerization reaction, after the reaction is finished, demolding, taking out hydrogel, washing, and carrying out freeze drying treatment to obtain freeze-dried hydrogel; and (3) immersing the freeze-dried hydrogel into a drug monomer solution until the hydrogel is completely swelled. The corneal contact lens prepared by the method disclosed by the invention can be polymerized in one step and rapidly prepared, has proper water content of a finished product, has excellent light transmission and mechanical properties, can effectively load traditional Chinese medicine antibacterial drugs and prolong the release time of the drugs, has a remarkable curative effect in treatment of bacterial keratitis, and is suitable for popularization and application. As a therapeutic corneal contact lens, the corneal contact lens has a wide market application prospect.

The invention provides an environment-friendly heat-resistant photovoltaic cable and a preparation method thereof. The environment-friendly heat-resistant photovoltaic cable comprises a conductor, an insulating layer and a sheath layer, the insulating layer is prepared from the following component raw materials: 20 to 30 percent of polylactic acid, 10 to 20 percent of polyhydroxyalkanoate, 25 to 35 percent of halogen-free flame-retardant crosslinked polyethylene, 5 to 15 percent of phosphate esterified lignin microspheres, 3 to 8 percent of quaternary ammonium salt chitosan nanofiber, 1 to 3 percent of modified graphene, 2 to 6 percent of epoxidized soybean oil, 1 to 5 percent of modified montmorillonite and 0.5 to 1.5 percent of nano silicon dioxide aerogel. The invention discloses an anti-aging agent which is prepared from the following components in percentage by weight: 2-4% of sodium alginate microcapsules, 0.5-1.5% of polydimethylsiloxane, 0.1-0.8% of a silane coupling agent and 0.1-0.8% of a plant polyphenol antioxidant. The sheath layer comprises the following raw material components: 45-55% of halogen-free flame-retardant crosslinked polyethylene, 10-20% of lignin-based carbon nanotubes, 5-15% of sulfonated chitosan / sodium alginate microspheres, 1-6% of graphene, 5-15% of epoxidized soybean oil, 2-8% of nano silicon dioxide, 1-3% of polydimethylsiloxane, 1-3% of peppermint oil microcapsules, 1-3% of a silane coupling agent and 0.1-0.8% of an antioxidant. And 0.1-0.8% of an ultraviolet light absorber. The photovoltaic cable disclosed by the invention has the advantages of flame retardance and difficulty in generating drippings after combustion.

The invention relates to the technical field of traditional Chinese medicine nano preparations, in particular to traditional Chinese medicine polysaccharide radiotherapy sensitization nanoparticles and a preparation method thereof.The preparation method comprises the following steps that 1, a chitosan-based carrier and traditional Chinese medicine polysaccharide are dissolved in a buffer solution, and the chitosan-based carrier is selected from chitosan, carboxymethyl chitosan or quaternized chitosan; step 2, putting the chitosan-based carrier solution into a reaction container, and dropwise adding glacial acetic acid to adjust the pH value of the system; 3, a cross-linking agent solution is dropwise added at a constant speed, a cross-linking agent is a multivalent anion / cation compound, and stirring is performed to form a core-shell structure; step 4, dropwise adding a traditional Chinese medicine polysaccharide solution into a mixed system in the step 3, and continuously stirring; step 5, filtering and granulating the obtained solution to obtain nanoparticles; according to the traditional Chinese medicine polysaccharide radiotherapy sensitization nanoparticles and the preparation method thereof, not only is radiotherapy sensitization achieved, but also the immunoregulation function is achieved, and the synergistic interaction of radiotherapy and immunotherapy is achieved by activating dendritic cells and T cells.

The invention discloses antibacterial and antioxidant bionic hydrogel as well as a preparation method and application thereof. The antibacterial and antioxidant bionic hydrogel disclosed by the invention comprises a hydrogel bracket, wherein the hydrogel bracket is prepared from methacrylated quaternized chitosan, acrylated cyclodextrin, methacrylated gelatin and dopamine grafted methacrylated hyaluronic acid according to the mass ratio of (2 to 4) to (1 to 3) to (5 to 7) to (0.5 to 1.5). The antibacterial and antioxidant bionic hydrogel disclosed by the invention has a porous intercommunication structure, relatively large porosity and water absorption rate, and excellent hydrophilicity, electroactivity, antibacterial property, oxidation resistance and biocompatibility. The antibacterial and antioxidant bionic hydrogel disclosed by the invention can be used as an antibacterial material, especially used as a dressing for treating chronic infection wound surfaces.

The invention discloses a diabetic bone defect repair hydrogel stent capable of slowly releasing exosome and a preparation method of the diabetic bone defect repair hydrogel stent. The preparation method comprises the following steps: preparing biotinylated quaternized chitosan methacrylate (QCS-MA-Biotin), formylated oxidized dextran and a biotinylated exosome (Exo-Bio), carrying out avidin bridging, and carrying out photocuring, so as to form the double-network hydrogel. The scaffold disclosed by the invention has a pH-responsive slow-release characteristic, the 28-day release rate of the exosome is less than or equal to 50%, and the activity retention rate gt; in addition, the repair of the diabetic bone defect can be obviously promoted. The method is suitable for repairing defects of skull, alveolar bone and the like.

The invention relates to the technical field of cationic etherifying agents, and discloses a quaternary ammonium salt type cationic etherifying agent and a preparation method thereof. The invention provides a quaternary ammonium salt type cationic etherifying agent by adding 3-chloro-2-hydroxypropyltrimethylammonium chloride and sulfaguanidine modified quaternized chitosan into a reactor, stirring, and obtaining the quaternary ammonium salt type cationic etherifying agent. The quaternary ammonium salt, guanidine group, and chitosan group contained in the sulfaguanidine modified quaternized chitosan all have good antibacterial effects; wherein the quaternary ammonium salt is adsorbed onto the bacterial cell surface, and the hydrophobic group is inserted into the lipid layer, thereby changing the permeability of the cell membrane, destroying the membrane structure, causing the leakage of intracellular substances, and causing bacterial death; the guanidine group can interfere with the normal metabolic process of the bacteria by combining with proteins and nucleic acids in the bacterial cells, further inhibiting the growth and reproduction of the bacteria, thereby playing a natural antibacterial effect; and the chitosan group itself has a good antibacterial effect.

The invention discloses a targeted delivery system of a largemouth bass frog iridovirus oral vaccine and a preparation method of the targeted delivery system, and relates to the technical field of biological medicines.The method comprises the following steps that a starch solution and a largemouth bass frog iridovirus inactivated vaccine are stirred and mixed, then a paraffin emulsion is added, stirring and emulsifying are conducted, and a W / O emulsion is obtained; adding calcium chloride, stirring and mixing, centrifuging, and resuspending by using a PBS (Phosphate Buffer Solution) to obtain a microsphere resuspension solution; stirring and mixing with a quaternized chitosan solution, adding glutaraldehyde for crosslinking, centrifuging, and freeze-drying. The invention further discloses a targeted delivery system of the largemouth bass frog iridovirus oral vaccine prepared by the method. The vaccine is orally administered after being microencapsulated, so that the human cost is low, the stimulation to fish bodies is small, the problems of inconvenience in fish administration, low bioavailability of oral administration, instability in gastrointestinal tracts and the like are solved, and the vaccine has an excellent application prospect in the field of LMBV prevention and control.

The invention discloses a dual-network injectable hydrogel as well as a preparation method and application thereof. The hydrogel is methacrylated gelatin / oxidized hyaluronic acid loaded with metal polyphenol nano-particles, and the metal polyphenol nano-particles are copper-gallic acid nano-particles which contain quaternized chitosan coatings and are loaded with antibacterial peptide HHC36. After the hydrogel is injected into a periodontal pocket, the hydrogel can adapt to different defect shapes, and the CuGA-coated HHC36-coated QCS nanoparticles are released by responding to a periodontitis microenvironment, so that the effects of resisting periodontal pathogenic bacteria, removing local excessive ROS (reactive oxygen species), effectively promoting fibroblast proliferation, collagen deposition, extracellular matrix accumulation and angiogenesis and further promoting periodontal bone regeneration are achieved. The preparation process is simple, the injectable hydrogel is low in price and easy to obtain, the injectable hydrogel can be prepared through simple steps, and a new thought is provided for treatment of periodontitis.

The invention discloses a medical antibacterial hose and a preparation method thereof, and belongs to the technical field of hose preparation. The medical antibacterial hose comprises the following components in parts by weight: 80 parts of PVC resin; 20 to 30 parts of a plasticizer; 0.6 to 0.8 part of a lubricant; 0.4 to 0.6 part of an antibacterial agent; the antibacterial agent is a quaternized chitosan / MOF composite material, and is recorded as HTCC / Ag / Zn-BDC. The preparation method comprises the following steps: S1, preparing an antibacterial agent HTCC / Ag / Zn-BDC; s2, mixing and granulating; and S3, extrusion molding. A quaternized chitosan / MOF composite material, namely HTCC / Ag / Zn-BDC, is used as an antibacterial agent of the medical antibacterial hose, and all the components can achieve a synergistic effect, so that an excellent antibacterial effect is achieved.

The invention discloses a preparation method of recombinant collagen-based antibacterial hemostatic powder, which comprises the following steps: mixing a recombinant collagen solution, a sodium polyacrylate solution and a quaternized chitosan solution, freeze-drying, and grinding. Based on the principle that molecular chains are wound to form gel through electrostatic interaction between negative charges of sodium polyacrylate and positive charges of quaternized chitosan, a novel hemostatic material design is inspired, recombinant collagen, sodium polyacrylate and a quaternized chitosan solution are blended, freeze-dried and ground, and the hydrogel is prepared. The recombinant collagen-based styptic powder is prepared. The styptic powder does not contain a cross-linking agent, avoids the risk of residual toxicity, and combines the high water absorption of sodium polyacrylate, the hemostatic and antibacterial characteristics of quaternized chitosan and the excellent biocompatibility of recombinant collagen. The material not only can realize instantaneous hemostasis of a bleeding part, but also can remarkably reduce the infection risk and accelerate wound healing.

The invention discloses a special ergothioneine-containing skin repair hydrogel for pets and a preparation method of the special ergothioneine-containing skin repair hydrogel, and belongs to the technical field of pet skin care hydrogels. The invention relates to a skin care product which comprises the following components in parts by weight: 1.6-3.8 parts of a functional active component consisting of ergothioneine, quaternized chitosan and oat beta-glucan, 0.15-0.35 part of a cross-linking agent, 5-10 parts of 1, 3-propylene glycol, 5-10 parts of glycerol, 0.2-0.5 part of a preservative and the balance of water, totaling 100 parts. Through precise compatibility of functional active components and synergistic construction of the ionic cross-linked gel matrix, systematic integration of three effects of oxidation resistance, bacteria resistance and healing promotion is achieved, and the technical problems that an existing pet skin care product is single in function, insufficient in synergy and limited in repairing effect are solved.

The invention relates to the technical field of high polymer material preparation, in particular to a quaternized chitosan-based composite membrane material as well as a preparation method and application thereof. The preparation method of the quaternized chitosan-based composite membrane material comprises the following steps: dissolving quaternized chitosan and a cross-linking agent in an organic solvent to obtain a mixed solution; pouring the mixed solution on the surface of a base material, and drying to obtain a chitosan film; pouring a two-dimensional layered material suspension into the surface of the chitosan membrane, and drying to obtain the quaternized chitosan-based composite membrane material. The preparation method is simple, has better stability and can be used for large-scale preparation. The quaternized chitosan-based composite membrane material prepared by the method has relatively high power density, the membrane has selective permeability to ions and is similar to a solid diode, and the thickness of the membrane is 0.08-0.11 mm. The quaternized chitosan-based composite membrane material can be applied to the aspect of osmotic energy power generation.

The invention provides a nylon fabric color fixing agent and a preparation method thereof, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a compound formed by quaternized chitosan, tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystalline-ZIF-8-coated SiO2 core-shell particles. The color fixing agent disclosed by the invention avoids the use of bisphenol compounds in the traditional color fixing process, and has the characteristic of environmental protection.

The invention discloses nano-silver compound hydrogel for promoting wound skin healing and repairing and a preparation method of the nano-silver compound hydrogel. The nano-silver compound hydrogel has good drug-loaded capacity, and meanwhile has the capacity of promoting wound skin healing and repairing. The prepared nano-silver compound hydrogel is smeared to a skin wound to seal the wound, and under the irradiation of 808 nm of near-infrared light, the nano-silver loaded on the black phosphorus nanosheet releases silver ions, so that the efficient antibacterial ability is achieved. In the gel system, the black phosphorus nanosheet is mixed with the hyaluronic acid and the quaternized chitosan to enhance the adhesion, and in addition, the photo-thermal effect of the black phosphorus nanosheet and the synergistic antibacterial effect are combined, so that the rapid healing and repair of a wound are promoted. The hydrogel obtained in the invention has good biocompatibility, and has potential application value in tissue engineering.

The invention belongs to the technical field of plastic floors, and particularly relates to an environment-friendly Non-PVC floor and a preparation method thereof. The floor is sequentially provided with a transparent sheet layer, a color film layer, a backing material layer and a ground mat layer from top to bottom. The backing material layer comprises PET, PETG, calcium carbonate powder, a plasticizer, a flexibilizer, an external lubricant, an internal lubricant and oxidized wax. The transparent sheet layer and the floor mat layer adopt quaternized chitosan coated trivalent titanium-loaded nano zinc oxide as an antibacterial material and have excellent dispersity and antibacterial performance, cork particles and nano white carbon black modified fibrilia are adopted as a base material, and the sound insulation effect and the mechanical performance are improved through the floor mat layer formed by hot-pressing bonding of PP and PE.

The invention discloses a polyphenol microcapsule synergistically delivered by double-layer hydrogel embedded probiotics as well as a preparation method and application of the polyphenol microcapsule. The preparation method comprises the following steps: mixing suspension at least containing polyphenol substances with zinc salt and gallic acid for reaction to prepare zinc-gallic acid embedded polyphenol nanoparticles; mixing the zinc-gallic acid embedded polyphenol nanoparticles with probiotics to react, so as to prepare a first solid product; and mixing the first solid product with pachymaran, then adding a solution at least containing quaternized chitosan and sodium tungstate dihydrate, and then preparing the obtained mixed solution into the double-layer hydrogel embedded probiotic synergistic delivery polyphenol microcapsule by adopting an electrospray mode. According to the preparation method disclosed by the invention, the probiotics are embedded by adopting the double-layer hydrogel microcapsule with outer layer removal and inner layer colonization for the first time, so that the protection performance and functionality of the microcapsule are enhanced, efficient embedding and colonization of the probiotics are realized, the activity of the probiotics is effectively prevented from being damaged by high temperature and machinery, and industrial production is facilitated.

The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a carbon-coated aluminum foil coating and a preparation method thereof. The invention aims to solve the problem of contradiction between high conductivity and strong adhesive force of the current carbon-coated aluminum foil coating. According to the invention, a multi-stage dimensional composite conductive network is taken as a design core, and the conductive performance of the coating is improved through a ternary composite system formed by conductive carbon black, one-dimensional carboxylated multi-walled carbon nanotubes and two-dimensional sulfonated graphene oxide; the binder adopts a bio-based water-based system and is formed by compounding carboxylated cellulose nanocrystals and quaternized chitosan, and a compact and tough bonding network layer is formed through electrostatic interaction and hydrogen bond combination; the conductive adhesive is excellent in conductivity and strong in adhesive force, the preparation process is environment-friendly and efficient, and the contradictory problem that the conductivity and the adhesive force are difficult to consider at the same time in the prior art is solved.