1981 results about "Antibacterial property" patented technology

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The invention discloses injectable hydrogel for photo-thermal adjuvant therapy of periodontitis and a preparation method, and belongs to the technical field of high polymer material preparation, the preparation method comprises the following steps: reacting MXene dispersion liquid with epigallocatechin gallate and MgSO4; then sequentially carrying out ultrasonic treatment, centrifugation, washing and freeze-drying to obtain a multifunctional nanosheet MP-Mg; adding the multifunctional nanosheet MP-Mg into an oxidized gellan gum aqueous solution, and carrying out a mixed reaction to obtain a solution A; mixing the quaternary ammonium salt chitosan aqueous solution and the carboxymethyl chitosan aqueous solution in equal volume, and reacting to obtain a solution B; and mixing the solution A and the solution B in equal volume for reaction. The hydrogel prepared by the preparation method disclosed by the invention has injectability, photo-thermal responsiveness, biological membrane penetrability, synergistic antibacterial property and long-acting anti-inflammatory property, and an innovative and practical photo-thermal adjuvant therapy platform is provided for clinical treatment of periodontitis.

The invention provides an antibacterial ceramic glaze sintering process optimization and intelligent temperature control method and system. According to the method, the molecular vibration characteristics of the antibacterial agent at different temperatures are dynamically obtained, and a thermal decomposition dynamic fingerprint database is constructed according to the attenuation law of the molecular vibration characteristics; meanwhile, a three-dimensional temperature field of the glaze layer is reconstructed based on a coupling relation between sound wave propagation parameters and glaze thermal expansion. And carrying out transfer learning on the fingerprint database and historical process data, predicting a glaze thermal stability attenuation parameter, and calculating a temperature gradient and molecular chain fracture compensation coefficient. And fusing the temperature field and the attenuation parameter, and dynamically regulating and controlling the sintering temperature curve and preserving heat by combining the compensation coefficient. The adjusted parameters generate closed-loop feedback by verifying the matching degree of the glaze microstructure and the antibacterial indexes, the compensation coefficient is corrected, and it is ensured that the antibacterial performance of the glaze is stabilized within the process allowance. The temperature control precision and the antibacterial performance stability of antibacterial ceramic glaze sintering are improved.

The invention discloses a surface-modified bioactive glass oral cavity desensitization paste and a preparation method thereof, and relates to the technical field of oral cavity desensitization pastes. The surface-modified bioactive glass oral desensitization paste is prepared from the following raw materials in parts by weight: 5 to 15 parts of bioactive glass, 3 to 6 parts of modifier, 3 to 5 parts of silicon dioxide, 20 to 30 parts of humectant, 0.5 to 1 part of sweetening agent, 0.5 to 1.5 parts of foaming agent, 0.5 to 2 parts of thickening agent and 60 to 120 parts of deionized water. The surface modified bioactive glass oral cavity desensitization paste prepared by the invention has excellent antibacterial performance and dentinal tubule sealing effect.

The invention discloses a high-activity injectable self-healing temperature-sensitive hydrogel dressing and a preparation method and application thereof, the high-activity injectable self-healing temperature-sensitive hydrogel dressing is obtained by forming a temperature-sensitive hydrogel through a two-dimensional nano material MXene aqueous solution and F127 under the hydrogen-bond interaction, combining an M2 macrophage source exosome on MXene under the electrostatic adsorption action, and wrapping the MXene through a network structure of the hydrogel. The preparation method is simple, an obtained sample is free of organic solution residues, reaction conditions are mild, operation is convenient, the raw material cost is low, the hydrogel dressing has temperature-sensitive, injectable and self-healing performance, the hydrogel dressing has temperature-sensitive and injectable performance, is sol at normal temperature, forms gel after making contact with skin and is convenient to smear and use on wounds, and experimental results prove that the hydrogel dressing has good application prospects. The hydrogel has good biocompatibility and relatively strong antibacterial performance, and can effectively play anti-inflammatory and vascular regeneration promoting roles in diabetic wounds and promote rapid repair of the diabetic wounds.

The invention belongs to the technical field of polypeptides and biological medicines, and particularly relates to a WK7 series antibacterial peptide and application thereof in the aspects of resisting bacteria and preventing and treating diabetic foot, pneumonia and septicemia. According to the invention, a linear peptide WK7-line with an amino acid sequence of WKRWKRW is used as a minimum active unit, and modification is carried out to form a plurality of linear modified peptides; meanwhile, a cyclic peptide WK7-cyl is formed on the basis of the linear peptide WK7-line through cyclization, and the cyclic peptide WK7-cyl is further modified to form an annular modified peptide. The linear peptide WK7-line, the linear modified peptide, the cyclic peptide WK7-cyl and the cyclic modified peptide jointly form the WK7-series antibacterial peptide, and the WK7-series antibacterial peptide is artificially synthesized polypeptide, is small in molecular weight, easy to synthesize, free of cytotoxicity, almost free of hemolysis risk, high in sterilization speed and broad-spectrum antibacterial property and can be used for preparing the antibacterial peptide. The traditional Chinese medicine composition has a certain effect on prevention and treatment of diabetic foot ulcer, pneumonia and septicemia.

The invention provides glycosaminoglycan hydrogel with a physical and chemical double crosslinking mechanism as well as a preparation method and application thereof, and relates to the technical field of biological materials. The glycosaminoglycan hydrogel is prepared from the following raw materials: oxidized sodium hyaluronate, chondroitin sulfate, epsilon-polylysine hydrochloride, a polydopamine-titanium dioxide compound and a stabilizer. The glycosaminoglycan hydrogel is prepared through a physical and chemical double-crosslinking mechanism under the specific raw materials and proportion, the problems of cytotoxicity and the like caused by use of a crosslinking agent or introduction of other solvents are avoided, a stable covalent network is constructed through chemical crosslinking, the gel is endowed with the self-repairing characteristic through physical crosslinking, and the self-repairing performance of the hydrogel is improved. And the viscosity of the product is remarkably improved, so that the hydrogel has stronger mechanical support performance, is suitable for wound repair, wound healing and the like, and has good antibacterial activity and stability.

The present invention provides a fiber structure having excellent antibacterial properties and washing durability, and a method for producing the same. [Solution] A textile structure having polyamide fibers and containing a dye, a quinoline-based compound, and a phenol derivative, wherein the textile structure contains 0.04% by mass or more of the quinoline-based compound relative to the mass of the textile structure, and even after 10 standard washes in accordance with the "SEK Mark Textile Product Washing Method," the textile structure contains 0.04% by mass or more of the quinoline-based compound relative to the mass of the textile structure, and 0.20% by mass or more and 4.00% by mass or less of the phenol derivative relative to the mass of the textile structure.

The invention discloses a preparation method of a multifunctional cellulose-based fiber, and belongs to the technical field of multifunctional fibers.The preparation method comprises the steps that firstly, a phosphoric acid compound and a polyphenol compound are placed in a reactor to be evenly mixed and react to obtain phosphoric acid modified polyphenol, and then the phosphoric acid modified polyphenol is subjected to wet grinding to obtain the multifunctional cellulose-based fiber; then adding the phosphoric acid modified polyphenol dispersion liquid subjected to ball milling into the cellulose-based spinning solution, finally stirring, mixing and defoaming to obtain a spinning solution containing phosphoric acid modified polyphenol, and spinning and forming to obtain the multifunctional cellulose-based fiber. The phosphoric acid modified polyphenol enables the fibers to have better flame retardance, antibacterial property, ultraviolet resistance and oxidation resistance, does not influence the softness and comfort of the fibers, has better binding force with the fibers, and ensures that the finishing effect is lasting and stable. The technology has high environmental protection property and sustainability, and is suitable for production of functional textiles, sportswear and high-performance fibers.

The invention discloses macromolecular antibacterial artificial leather and a preparation method thereof, and relates to the technical field of artificial leather preparation. The preparation method comprises the following steps: preparing zinc-loaded silicon dioxide with amino grafted on the surface and quaternized polyether polyurethane containing an epoxy group, mixing the zinc-loaded silicon dioxide and the quaternized polyether polyurethane to prepare antibacterial protection slurry, and bonding the zinc-loaded silicon dioxide and the quaternized polyether polyurethane through ring-opening reaction of the amino and the epoxy group during curing to form a cross-linked network, so as to obtain the antibacterial protection layer with antibacterial property, flexibility and wear resistance; zinc ions have an obvious inhibiting effect on bacteria such as gram-positive bacteria and gram-negative bacteria and fungi such as candida albicans, quaternary ammonium salt has an obvious inhibiting effect on influenza viruses, and the zinc ions and the quaternary ammonium salt have a synergistic effect, so that the antibacterial range of the artificial leather is wider, the inhibiting force on germs is stronger, and the antibacterial property of the artificial leather is further improved.

The invention discloses an isothiazolinone non-curing coating and a preparation method thereof, and relates to the technical field of waterproof coatings. The coating comprises a base material, a compound isothiazolinone antibacterial agent, a mixed stabilizer, a compound plasticizer, a compound anti-aging agent, a filler, an adhesion promoter and a solvent, the compound type isothiazolinone antibacterial agent is prepared by mixing and compounding 2-methyl-4-isothiazolin-3-ketone and 5-chloro-2-methyl-4-isothiazolin-3-ketone according to a mass ratio of (1 to 3): 1, and the compound type isothiazolinone antibacterial agent is prepared by mixing and compounding 2-methyl-4-isothiazolin-3-ketone and 5-chloro-2-methyl-4-isothiazolin-3-ketone and 5-chloro-2-methyl-4-isothiazolin-3-ketone; the mixed stabilizer is formed by mixing organic bentonite, polyamide wax and fumed silica; the defects that an existing non-curing coating is poor in antibacterial performance, insufficient in aging resistance and poor in formula compatibility are overcome.

An antibacterial polymer having a molecular weight above a certain level, which is highly miscible with other polymers compared to a monomolecular type antibacterial agent and can be added during the melt extrusion process. Further the antibacterial polymer has the advantage of exhibiting excellent antibacterial properties against Gram-negative bacteria and does not elute over time.

The invention discloses a high-barrier degradable vegetable and fruit preservative film based on multi-layer compounding and a preparation method thereof, belongs to the technical field of food packaging materials, and aims to solve the technical problem that the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film in the prior art need to be further improved. The degradable vegetable and fruit preservative film comprises a first layer, a second layer and a third layer which are sequentially laminated, and the first layer is prepared from, by weight, 65-75 parts of polylactic acid, 4-8 parts of maleic anhydride grafted polylactic acid, 2-4 parts of modified carbon nitride, 1-3 parts of alizarin microcapsules, 3-6 parts of modified lignin and 1-2 parts of auxiliary additives; through the synergistic effect of the modified carbon nitride, the alizarin microcapsules and the modified lignin, the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film are further improved.

The invention relates to a composition with functions of protecting gingiva and repairing enamel and a preparation method of the composition, and belongs to the technical field of oral care. The composition contains a functional additive, a plant compound fermentation extract and the like, the functional additive is a mixture of corn starch, calcium phosphosilicate, hydroxyapatite, ubiquinone, sodium guaiazulene sulfonate, menthol and vitamin E, and the plant compound fermentation extract is obtained by fermenting and purifying honeysuckle flowers, radix polygonati officinalis and dandelions according to a specific proportion. Through the synergistic effect of the fermentation extract and the functional components, the problems that an existing toothpaste body is hardened, the storage stability is poor, the gingival protecting effect is short, and the enamel repairing persistence is insufficient are solved, the gingival protecting effect can be enhanced, the enamel repairing effect can be improved, the stability of the toothpaste body can be optimized, the antibacterial property and the oral mucosa relieving effect are achieved, and the oral cavity repairing effect is achieved. And the preparation process is scientific and reasonable, and is suitable for daily oral care.

The invention discloses an intelligent preparation system and process for a composite antibacterial material with synergistic interaction of nanoparticles, and relates to the field of preparation of composite antibacterial materials. The raw material pretreatment module integrates a nano particle purification unit, a base material modification unit and an antibacterial agent dispersion unit, so that the purity and the dispersity are improved; the intelligent proportioning and mixing module consists of a five-channel metering pump, a dynamic mixer and a concentration monitoring device and is used for accurately controlling the component proportion; the reaction synthesis module comprises a constant-temperature reaction kettle, a pressure control system and an inert gas protection unit, and stable reaction is guaranteed; the performance online detection module is used for testing the antibacterial property, the mechanical property and the microstructure; the intelligent regulation and control module optimizes process parameters through an algorithm; the product post-processing module comprises a filtering unit, a drying unit and a sterile packaging unit to ensure the product quality. The antibacterial performance and stability are improved, the antibacterial aging is prolonged, energy consumption is reduced, efficient, green and intelligent preparation of the composite antibacterial material is achieved, and industrial technology upgrading is promoted.

The invention relates to the technical field of PA resin, and particularly discloses glass fiber modified antibacterial PA resin suitable for children products and a preparation method of the antibacterial PA resin. The invention discloses glass fiber modified antibacterial PA resin suitable for children products. The glass fiber modified antibacterial PA resin comprises PA resin, glass fibers, talcum powder, nano calcium carbonate, a composite antibacterial agent, a compatilizer, an antioxidant and calcium stearate, the composite antibacterial agent comprises chitosan, an antibacterial peptide microcapsule and a porous silver-zinc-loaded antibacterial agent; the antibacterial peptide microcapsules are sodium alginate embedded antibacterial peptides. The antibacterial PA resin obtained in the invention has the highest bacteriostasis rates of 99.97%, 99.74% and 99.95% for staphylococcus aureus, escherichia coli and candida albicans respectively, the antibacterial property of the PA resin is improved, the compressive strength and notch impact strength are 170.6 MPa and 17.3 kJ / m < 2 > respectively, and high mechanical strength is maintained on the basis of high antibacterial property.

The application discloses a light-weight moisture-conducting functional fabric and a preparation method thereof, and relates to the technical field of textiles.The light-weight moisture-conducting functional fabric comprises an inner layer and an outer layer, the inner layer is obtained by blending polyester fibers and nylon special-shaped cross-section fibers, and the outer layer is obtained by blending modified polypropylene fibers and hollow polyester fibers; the modified polypropylene fibers are obtained by melting and spinning the mixture of polypropylene chips and modified jade powder and then stretching; the prepared fabric not only has the characteristics of light weight and one-way moisture-conducting capability, can quickly discharge sweat outside the body, realizes dry and cool isolation between the skin and the outside world, and has multiple health protection functions such as persistent antibacterial property, efficient ultraviolet resistance and contact cool feeling.

The application belongs to the technical field of plastics, and particularly relates to a degradable antibacterial plastic packaging bag and a preparation method thereof. The degradable antibacterial plastic packaging bag comprises the following raw materials in parts by weight: polycaprolactone 70-90 parts; polybutylene adipate terephthalate 20-40 parts; Cr and Cu co-modified ZIF-8 5-20 parts; and cerium oxide tannic acid material 2-6 parts. The Cr and Cu co-modified ZIF-8 synergistically improves the antibacterial performance of the packaging bag, and the addition of the cerium oxide tannic acid material further improves the antibacterial performance of the packaging bag. Moreover, the degradable antibacterial plastic packaging bag prepared by the application has excellent mechanical properties.

The preparation method comprises the following steps: by taking natural chitosan, epsilon-polylysine and polyphenol as raw materials, firstly, respectively preparing polyphenol modified chitosan and carboxyphenylboronic acid modified polylysine through a carbodiimide coupling method, then, mixing single-component solutions of the polyphenol modified chitosan and the carboxyphenylboronic acid modified polylysine, and then, preparing the antibacterial and antioxidant glycopeptide hydrogel based on the polyphenol. And the antibacterial and antioxidant glycopeptide hydrogel is obtained by virtue of the synergistic effect of the phenolic hydroxyl group-boric acid group dynamic bond and the amino group-carboxyl group. The hydrogel disclosed by the invention has broad-spectrum antibacterial property and glucose response oxidation resistance, has self-healing capability and strong wound adhesion, is excellent in biocompatibility and can be naturally degraded; and the process is simple, convenient and controllable, large-scale production is easy to realize, the hydrogel can be used as a wound dressing for treating chronic difficult-to-heal wounds such as diabetes mellitus in a targeting manner, and integrated nursing of antibiosis, antioxidation, wound adhesion and self-repairing is realized.

The invention discloses efficient flame-retardant antibacterial polyurethane synthetic leather and a preparation method thereof, and relates to the technical field of polyurethane synthetic leather, the polyurethane synthetic leather comprises a base cloth layer and a polyurethane functional layer covering the surface of the base cloth layer; the polyurethane functional layer is prepared from the following components in parts by weight: 80 to 95 parts of polyether polyol, 30 to 45 parts of diisocyanate, 5 to 10 parts of a composite flame retardant, 3 to 6 parts of a synergistic flame retardant, 0.5 to 1.5 parts of an antibacterial agent, 2 to 4 parts of a chain extender and 0.05 to 0.2 part of a catalyst. According to the efficient flame-retardant antibacterial polyurethane synthetic leather provided by the invention, the synthetic leather has excellent flame-retardant grade and good antibacterial property and mechanical property, and the preparation method disclosed by the invention is simple in process and suitable for industrial production.

The invention discloses a preparation method and antibacterial application of a naphthothiadiazolyl photosensitizer, and belongs to the technical field of biomedical antibacterial materials. The naphthothiadiazole-based photosensitizer provided by the invention overcomes the problem that the existing commercial photosensitizer gathers and quenches the active oxygen efficiency, and meanwhile, the antibacterial photosensitive polymer prepared based on the novel naphthothiadiazole-based photosensitizer has the unique advantages that the structure is stable, photosensitizer micromolecules are not easy to leak and the antibacterial effect is long-acting; the construction of the antibacterial polymer coating on the surface of the medical instrument in the future has important clinical application potential. The naphthothiadiazolyl photosensitizer provided by the invention has good photodynamic killing performance on drug-resistant bacteria MRSA (Methicillin Resistant Staphylococcus Aureus).

The invention discloses an antibacterial bioactive glass composite material for skull defect repair and a preparation method thereof, and relates to the technical field of bioactive glass materials. The antibacterial bioactive glass composite material for skull defect repair is prepared from the following raw materials in parts by weight: 8 to 15 parts of collagen, 45 to 55 parts of bioactive glass, 20 to 30 parts of hydroxyapatite, 5 to 8 parts of a toughening agent, 1 to 2 parts of an antibacterial agent and 150 to 250 parts of deionized water. The antibacterial bioactive glass composite material for skull defect repair prepared by the invention has excellent bending strength and antibacterial property.

The invention relates to the technical field of fabrics, in particular to a cool-feeling long cilia strip and a preparation method thereof.The cool-feeling long cilia strip is composed of cool-feeling fibers and a long cilia strip base material and is characterized in that the cool-feeling fibers comprise a core layer, a functional skin layer and an outer thin skin layer; the functional skin layer is prepared from the following components: a sulfonated copolyester matrix, catechol grafted master batch, surface modified zeolite nano powder, an anti-hydrolysis agent and an antioxidant, and the functional skin layer also contains introduced Zn < 2 + > and Mg < 2 + >. Zn < 2 + > and Mg < 2 + > which are stably combined on anchoring points of sulfonated copolyester are subjected to hydration endothermic reaction when being in contact with water, so that a cool feeling is generated; the surface modified zeolite nano powder synergistically enhances moisture absorption and water temporary storage by virtue of the specific surface area, and continuously provides water for an ionized hydration reaction to prolong and amplify a cool feeling effect; the catechol grafting structure endows the fiber with antibacterial performance, and long-term stability of the structure is ensured through an interface enhancement effect. And the outer layer hydrophilic polyester is matched, so that the product has comfort, durability and functionality.

The invention belongs to the technical field of medical osteogenesis materials, and particularly relates to a titanium-based material surface PDPASr (at) CO coating with osteogenesis promoting and antibacterial functions and a preparation method and application thereof.The preparation method comprises the steps that S1, a titanium-based material is soaked in an alkali solution and placed in a vacuum drying oven to be subjected to alkali heat treatment; s2, allowing the titanium-based material to stand under a dark condition, soaking the titanium-based material in a polydopamine solution for 20-28h, and then taking out the titanium-based material; s3, preparing a mixed solution system containing PAH, SrCl2 and NaOH, standing the titanium-based material under a dark condition, soaking the titanium-based material in the mixed solution system for 20-30 hours, and then taking out the titanium-based material; s4, the titanium-based material is soaked in a ferroferric dodecacarbonyl solution, the titanium-based material is taken out after being shaken and reacted for 20-30 h in a shaker under the dark condition, and the titanium-based material with the PDPASr (at) CO coating on the surface is obtained.The PDPASr (at) CO coating on the surface of the titanium-based material has the excellent osteogenesis performance, the spreading, early differentiation and late mineralization effects of osteoblasts can be obviously promoted, and the titanium-based material has the good application prospect. And under the condition of near-infrared light irradiation, the material shows excellent antibacterial performance.

The invention belongs to the technical field of packaging materials, and particularly relates to a packaging material with antibacterial activity and a preparation method thereof. The packaging material with antibacterial activity is prepared from the following raw materials in parts by weight: 60 to 70 parts of polylactic acid, 10 to 20 parts of poly (butylene succinate), 3 to 5 parts of modified montmorillonite, 0.5 to 1 part of a bacteriostatic agent, 0.5 to 1 part of a lubricating agent, 1 to 3 parts of a compatilizer and 1 to 1.5 parts of functional filler. The packaging material provided by the invention has excellent barrier property, antibacterial property and mechanical property, stable fixation and synergistic interaction of functional components such as the modified montmorillonite and the functional filler are realized, and the packaging material has important significance in promoting technical progress of the packaging industry and meeting the requirements of the market on high-performance packaging materials.

The invention discloses a production method of a cool-feeling antibacterial PA66 chinlon filament, and belongs to the technical field of chemical fiber manufacturing. According to the method, PA66 slices are used as raw materials and matched with jade cool-feeling master batches and a septol antibacterial oil agent (the effective component is OPHB), and the PA66 polyamide filament with the cool-feeling antibacterial effect is prepared through the process steps of slice and master batch mixing, melt spinning, side blowing cooling, oiling, drafting and winding and the like. The cool-feeling antibacterial PA66 chinlon filament produced by the invention not only has excellent physical properties (the fineness is 40-50 dtex, the breaking strength is greater than or equal to 3.5 cN / dtex, and the elongation at break is 36-46%), but also has long-acting antibacterial property (the antibacterial rate to escherichia coli and staphylococcus aureus is greater than or equal to 99%, and the antibacterial rate after 50 times of washing is still greater than or equal to 98%) and stable cool feeling (the cool feeling value Q-max is greater than or equal to 0.2 W / (m.K)), and is safe, non-toxic, environment-friendly, simple in process and low in cost. The method is suitable for the field of close-fitting textiles such as warp knitting, weft knitting and hosiery knitting, and the industrial applicability is high.

The invention belongs to the field of antibacterial materials, and discloses a preparation method of a composite material modified carbon-nitrogen material as well as a product and application of the composite material modified carbon-nitrogen material. In order to achieve the long-acting and efficient antibacterial performance of the nano material, g-C3N4 powder is taken and placed in methyl alcohol, zinc nitrate is added, stirring is conducted till the zinc nitrate is dissolved, then the mixture is mixed with a methanol solution of 2-methylimidazole, after the mixture is subjected to heat treatment, the mixture is mixed with a polyhexamethylene biguanide hydrochloride aqueous solution, and the nano material is obtained. A compact inert material protection layer can be grown on the surface of the material by adopting an atomic layer deposition technology. The method provided by the invention is simple to operate and can be used for batch production, the obtained composite material integrates the advantages of an organic antibacterial agent and an inorganic antibacterial agent and has long-acting and efficient antibacterial performance, and the antibacterial material obtained by the method can be applied to various fields, such as antibacterial performance modification of antibacterial plastics and textiles.

The application discloses a skin repair dressing and a preparation method thereof, and belongs to the technical field of medical dressings. The skin repair dressing comprises the following raw materials in parts by weight: carboxymethyl chitosan 4-6 parts, sodium alginate 2-4 parts, polyvinyl alcohol 8-10 parts, recombinant human collagen 1-2 parts, sodium hyaluronate 0.5-1 part, a crosslinking agent 1.5-2 parts, nano filler 0.1-0.5 part, an antioxidant 0.5-1 part and deionized water 80-90 parts; the crosslinking agent is prepared by reacting glutathione with dithio-bismaleimidyl ethane to obtain an intermediate 1, and then reacting with 4-formylphenylboronic acid. The skin repair dressing prepared by the application has excellent tensile properties and antibacterial properties.