580 results about "Antibacterial coating" patented technology

The invention discloses a portable wound surface protection brace and an application method thereof, and belongs to the technical field of medical instruments. The brace is of a cylindrical structure, is made of EVA materials, has flexibility, non-toxic characteristics and good supporting performance and is externally wrapped with cotton cloth and provided with ventilation through holes, high-density cotton strips are fixed to the two ends of the inner wall to form a hollow structure, and the circumference of the outer wall can be adjusted through at least three sets of bandages with hook-and-loop fasteners. And an antibacterial coating is added, so that clinical application is expanded. During application, a wound surface is subjected to liquid extraction and hydrogen peroxide cleaning in the earlier stage and then covered with insulin mixed normal saline gauze, and the dressing is prevented from making contact with clothes in cooperation with a brace; and smearing mupirocin ointment in the later stage and performing infrared irradiation, and continuously using the brace to keep the wound dry and zero contact. The brace can be repeatedly used, can adapt to various wound types and patient body types, effectively solves the problems of wound adhesion and friction in traditional nursing, creates a high-oxygen healing environment, remarkably shortens wound healing time, relieves pain of patients and improves life quality, and has good clinical application and popularization value.

The invention relates to the technical field of food packaging materials, in particular to a cerium dioxide nano-enzyme modified antibacterial coating and application of the cerium dioxide nano-enzyme modified antibacterial coating in food packaging. The biomimetic mineralization layer comprises the following components in percentage by weight: 35-45% of a green base material, 8-12% of dopamine modified yttrium-doped cerium dioxide nano-enzyme, 4-6% of a composite antibacterial agent, 3-4% of a natural cross-linking agent, 2-3% of a degradable plasticizer, 1-2% of a biomimetic mineralization layer precursor and the balance of deionized water, the green base material is a blend of a chitosan-polyethylene glycol graft and polylactic acid; the doping amount of Y3 in the nano enzyme is 3-4at%. The antibacterial agent is excellent and lasting in antibacterial effect, has no migration risk of the antibacterial agent, and can guarantee food safety; a green base material and a degradable plasticizer are adopted, so that natural degradation is realized, and environmental pollution is avoided; the mechanical property is good, the aging resistance is realized, and the oxygen barrier property is strong; the food packaging box is suitable for various foods, effectively prolongs the shelf life, and meets the requirement of green packaging.

The invention discloses a concrete sewage pipeline antibacterial anticorrosive coating material and a preparation method thereof, the concrete sewage pipeline antibacterial anticorrosive coating material is prepared from the following raw materials: water, water supply aluminum sludge ash, a water reducing agent, Portland cement, aggregate and antibacterial agents, the antibacterial agents are three antibacterial agents with different representativeness, respectively zinc oxide ZnO, copper phthalocyanine C32H16CuN8 and dihexadecyl dimethyl ammonium bromide C34H72BrN. Compared with a traditional concrete anticorrosive coating material, the prepared antibacterial anticorrosive coating material for the sewage pipeline has the advantages that the water supply aluminum sludge ash modified cement-based material is used as a carrier, and the antibacterial agent is used as a functional component to be doped to prepare a functional antibacterial coating, so that the microbial corrosion resistance and the stability of the coating are remarkably improved, and the antibacterial anticorrosive coating material is green and environment-friendly, and has a good application prospect. The method is low in cost, simple in process and convenient to prepare.

The invention discloses a stainless steel material for a food-grade straw and a preparation process of the stainless steel material, and relates to the technical field of stainless steel material plating. The silver coating and the antibacterial coating are arranged on the surface of the stainless steel material, and the stainless steel material has good wear resistance and antibacterial performance through the action of the double protective layers. Sulfonated polyphenylene sulfide is added into a silver plating solution, a plating layer is formed after electroplating, the surface of a stainless steel material is not prone to being scratched, the wear resistance of stainless steel is improved, quaternary ammonium salt modified tea polyphenol-nano-silver composite particles are added into the antibacterial coating, and through the synergistic antibacterial effect of quaternary ammonium salt, tea polyphenol and nano-silver, the wear resistance of the stainless steel material is improved. The broad-spectrum antibacterial property is realized, and the efficient antibacterial effect is achieved.

The invention discloses a method and a system for detecting an antibacterial coating micro guide wire. The method comprises the following steps: applying a composite stress field to a guide wire to obtain stress distribution data; determining a stress response abnormal area according to the stress distribution data and applying dual-frequency vibration excitation to obtain nonlinear vibration response data and vibration energy dissipation data; force-sensitive fluorescent molecules are applied to the stress response abnormal area for treatment, and conformational changes of the stress response abnormal area are monitored to obtain preliminary spatial distribution data of the microcracks; injecting a multi-ion fluorescent tracer into the micro-crack area, and monitoring the migration rule of the multi-ion fluorescent tracer to obtain pH value distribution data and oxidation-reduction potential distribution data; bacterial suspension with specific fluorescence response is injected into the micro-crack area, and antibacterial activity evaluation data is obtained by monitoring the fluorescence response of the bacterial suspension. According to the technical scheme, the microcracks on the surface of the antibacterial coating micro guide wire are accurately detected and positioned, and the influence degree of the microcracks on the antibacterial function can be accurately evaluated.

The invention relates to the technical field of biomedicine, and discloses a triclosan antibacterial coating surgical suture and a preparation method thereof.The suture comprises a base material and a surface antibacterial coating, the base material is selected from one of an absorbable single-strand material, an absorbable multi-strand material, a non-absorbable single-strand material and a non-absorbable multi-strand material, and the surface antibacterial coating is selected from one of an absorbable multi-strand material and a non-absorbable multi-strand material; the antibacterial coating comprises triclosan, a high-molecular carrier and an auxiliary agent, the surface energy of a hydrophobic material is improved, the porosity of a hydrophilic material is increased, the adhesive force between the coating and different base materials is ensured, the base materials can be covered, the uniformity deviation of the coating is avoided, and the coating is free of cracking or falling off through the combination of plasma cleaning and roughening treatment on the surface of the base materials. A synergistic system is formed by triclosan, nano-silver and titanium dioxide, a dual mechanism of targeted destruction of bacterial cell membranes and free radical oxidation is achieved, the antibacterial rate is increased, the MRSA inhibition rate is increased, the degradation rate is regulated and controlled through the polylactic acid-glycolic acid copolymer carrier molecular weight and the lactic acid / glycolic acid proportion, and a curing dynamic formula is combined.

The invention discloses an antibiotic-loaded lubricating antibacterial medical coating as well as a preparation method and application thereof. The preparation method comprises the following steps: coating a polymer substrate embedded with an initiator with a prepolymer solution, and carrying out ultraviolet irradiation reaction to prepare a lubricating hydrogel coating; the preparation method comprises the following steps: sequentially carrying out ultrasonic cleaning in an ethanol solution and an aqueous solution, drying, soaking in an antibiotic solution, regulating and controlling the loading capacity of antibiotics by controlling the pH value of the antibiotic solution, taking out, washing with the aqueous solution, and drying to obtain the lubricating antibacterial coating. According to the method, a hydrogel coating loading platform for loading the antibiotics only through post-adsorption is constructed, the loading capacity of the antibiotics in the coating can be regulated and controlled through the pH value of an antibiotic solution in the post-adsorption process, and the method effectively widens the adjustable range of the loading capacity of the antibiotics such as rifampicin; according to the invention, on-demand regulation and control of antibiotic load and related release curves in the hydrogel coating under different application scenes can be realized, and an effective multifunctional strategy is provided for reducing related infection of interventional medical catheters.

The invention provides an antibacterial polyurethane acrylate film material embedded with N-substituted benzisothiazolinone and alkenyl functionalized quaternary phosphonium salt, and belongs to the field of organic antibacterial coatings. N-substituted alkenyl of benzisothiazolinone is functionalized, tri (4-methoxyphenyl) phosphine alkenyl is functionalized, and the antibacterial polyurethane acrylate film material is prepared. Double bonds are introduced into a benzisothiazolinone structural unit and a tri (4-methoxyphenyl) phosphine structural unit, N-substituted benzisothiazolinone (NIT) and tri (4-methoxyphenyl) (nonyl-8-ene-1-yl) phosphonium bromide (TPC9) are grafted into a polyurethane acrylate main chain at the same time, and by means of the remarkable antibacterial activity of the NIT and the TPC9 on escherichia coli and staphylococcus aureus, the polyurethane acrylate can be used for preparing the antibacterial polyurethane acrylate. A broad-spectrum antibacterial material is prepared, and a corresponding antibacterial coating can be used for modifying the surface of a base material.

The invention discloses a slow-release antibacterial and antioxidant composite preservative film and a preparation method thereof. The slow-release antibacterial and antioxidant composite preservative film is prepared from a chitosan matrix and Chuzhou chrysanthemum essential oil nano-emulsion loaded in the chitosan matrix, the Chuzhou chrysanthemum essential oil nano-emulsion comprises Chuzhou chrysanthemum essential oil, a surfactant and a cosurfactant, and the average particle size of the Chuzhou chrysanthemum essential oil nano-emulsion is smaller than 200 nm; the composite preservative film has the function of slowly releasing the Chuzhou chrysanthemum essential oil and shows antibacterial and antioxidant activity; the preparation method comprises the following steps: firstly preparing Chuzhou chrysanthemum essential oil into a nano-emulsion by adopting a nano-encapsulation method through a high-pressure homogenization method to form the Chuzhou chrysanthemum essential oil nano-emulsion, then embedding the Chuzhou chrysanthemum essential oil nano-emulsion into chitosan to prepare an active chitosan composite film, and finally applying the antibacterial coating material to food preservation. The antibacterial coating film not only can effectively inhibit pathogenic microorganism infection in berry storage and logistics transportation in a wider spectrum, but also can regulate physiological metabolism of picked berries, delay the senescence process and reduce loss of internal moisture.

The invention relates to the technical field of packaging materials, in particular to a preparation method of a food heat-preservation environment-friendly quick-transportation packaging bag. The prepared quick-transportation packaging bag sequentially comprises an outer film layer, a heat preservation layer, an aluminum foil layer and an inner film layer from outside to inside. The outer film layer and the inner film layer are made of a blend of polylactic acid, carboxymethyl starch and glycerol, the thermal insulation layer is formed by compounding a phase change capsule, silicon dioxide aerogel and a polyurethane adhesive on an aluminum foil layer, the phase change capsule takes a mixture of n-octadecane and paraffin as a core material and takes Arabic gum as a wall material, and the outer surface of the wall material is coated with a stearic acid film layer; an antibacterial coating containing microwave modified beewax, a functional additive and 3-aminopropyltriethoxysilane is sprayed on the inner surface of the inner film layer; the prepared quick-transportation packaging bag has excellent heat preservation performance and antibacterial performance, also has good degradability, is environmentally friendly and can meet multiple requirements of modern food logistics for packaging.

The invention relates to an enzyme response antibacterial carbon dot and a preparation method and application thereof.The carbon dot takes a copper-doped carbon dot as a core and is covalently grafted with a hyaluronic acid shell layer through amidation reaction to form a composite nano material Cu-CDs (at) HA, specifically, soluble copper salt and folic acid are subjected to a hydrothermal reaction to obtain the copper-doped carbon dot, carboxyl is activated through EDC / NHS in a buffer system, and the carbon dot is prepared. And performing grafting reaction with hyaluronic acid to obtain a target product. The hyaluronidase-containing antibacterial composition can be specifically degraded and release antibacterial components under the action of hyaluronidase, shows good bacterial responsive bactericidal performance, has the minimum inhibitory concentrations of 8 g / mL and 16 g / mL for staphylococcus aureus and escherichia coli respectively, and has peroxidase-like activity and free radical scavenging capacity. The antibacterial carbon dots can be used for preparing intelligent wound dressings, antibacterial coatings and other biomedical materials, and have the advantages of responsive drug release, efficient antibacterial property and promotion of wound repair.

The application discloses a high-performance corrugated carton with waterproof and antibacterial functions and a preparation process thereof, and the process comprises the following steps: S1, providing a corrugated paperboard substrate; S2, coating a barrier-enhanced coating liquid on the inner and outer surfaces of the corrugated paperboard substrate respectively, and forming a barrier-enhanced coating layer after solidification; S3, coating a composite antibacterial coating liquid, and forming a composite antibacterial coating layer after solidification to obtain a composite corrugated paperboard; and S4, using the composite corrugated paperboard to make a corrugated carton. The composite antibacterial coating layer can improve the waterproof performance of the composite corrugated paperboard and endow the composite corrugated paperboard with excellent antibacterial performance. Through cooperation of the barrier-enhanced coating layer and the composite antibacterial coating layer and with the excellent barrier effect of the barrier-enhanced coating layer, the waterproof performance of the composite corrugated paperboard can be further improved while avoiding the risk that active oxygen brought by the composite antibacterial coating layer may damage the performance of the corrugated paperboard substrate, and the mechanical strength of the composite corrugated paperboard can be improved, so that the service life of the composite corrugated paperboard can be ensured.

The invention discloses an antibacterial coating which comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 40-60 parts of epoxy resin, 15-35 parts of polyamide resin, 5-10 parts of tea tree essential oil, 1-3 parts of di (2-ethylhexyl) phthalate, 1-2 parts of fumed silica, 1-2 parts of acrylate, 1-2 parts of sodium phosphate and 1-2 parts of polyvinyl ether. The component B comprises the following raw materials in parts by weight: 20-30 parts of modified nano zinc oxide, 40-60 parts of an antibacterial curing agent, 15-20 parts of butanol and 2-10 parts of acetone. The weight ratio of the component A to the component B is 8: (2-4), and the water-resistant coating is excellent in mechanical property, high in adhesive force and good in water resistance.

The application relates to a modified polylactic acid oligomer and a preparation method and application thereof. The modified polylactic acid oligomer has the structure shown in the following formula (I). The modified polylactic acid oligomer obtained by copolymerization of 5-hydroxy-2-hexenoic acid and lactic acid has more excellent and stable and persistent antibacterial activity, the antibacterial efficiency is greatly improved, the sterilization rate is improved, and the sterilization time is shortened; when the modified polylactic acid oligomer is applied to various antibacterial coatings and textile finishing, the surface no longer has a wet sticky feeling, the commercialization and wide application of the material are more beneficial, and the modified polylactic acid oligomer has higher affinity to a target substrate, so that the persistence, stability and washability of a surface coating can be improved.

The invention discloses a pH / temperature dual-response type quaternary ammonium salt-nano silver-zinc oxide composite antibacterial coating material as well as a preparation method and application thereof, and belongs to the technical field of antibacterial materials. The antibacterial effective life of the coated product is at least up to 5 years. The coating product is preferably a gastrointestinal endoscope, efficient bacteriostasis is achieved under the condition that the light transmittance of the gastrointestinal endoscope is not affected, biocompatibility is good, safety is high, precise controlled release of silver ions is achieved, and biotoxicity caused by sudden release of the silver ions is avoided. The quaternary ammonium salt-nano silver-zinc oxide composite coating material with the pH / temperature dual-response antibacterial effect is finally obtained through the steps of preparing a composite carrier material, loading antibacterial metal elements, constructing a pH / temperature dual-response polymer network and the like in sequence. A high-performance, safe and environment-friendly antibacterial coating system which is rapid in sterilization, precise in controlled release and long-acting in interference resistance is constructed, and an antibacterial solution with high technical adaptability is provided for the fields of medical treatment, food, water treatment and the like.

The invention discloses an antibacterial coating for a concrete surface as well as a preparation method and application of the antibacterial coating, and relates to the technical field of functional polymers. The antibacterial coating for the concrete surface is prepared from the following raw materials in parts by weight: 100 parts of a monomer mixture, 0.7 to 3.1 parts of an initiator, 0.3 to 2.0 parts of a chain transfer agent and 75 to 125 parts of a solvent, wherein the monomer mixture comprises a methacrylate monomer, an acrylate monomer, sodium acrylate, a urea methacrylate monomer and a capsaicin derivative in a molar ratio of (12-60): (20-60): (2-10): (2-10): (1-5). The antibacterial coating for the concrete surface is easy to prepare and operate, low in cost and environmentally friendly, and raw materials are easy to obtain; the capsaicin derivative monomer is introduced into the antibacterial coating for the concrete surface, so that the antibacterial activity of the resin is improved, and the problem of biological fouling of a concrete structure in marine infrastructure is solved.

The invention provides metal organic framework loaded guanidyl polymer nanoparticles as well as a preparation method and application thereof. The nanoparticles comprise a copper-based metal-organic framework material and a guanidyl-containing polymer loaded on the surface of the copper-based metal-organic framework material; the copper-based metal-organic framework material comprises a copper trimesic acid complex, the copper trimesic acid complex has a porous structure and an octahedral structure, and the guanidyl-containing polymer is distributed in the porous structure and on the surface of the octahedral structure; the nanoparticles are insoluble in water, and the particle size of the nanoparticles is nanoscale. When the antibacterial agent is added into the resin, the non-dissolution antibacterial coating can be prepared, the guanidyl-containing polymer is not easy to dissolve out, the antibacterial coating is endowed with good antibacterial property, and the problems that the hydrophilic guanidyl-containing polymer and the coating resin are poor in compatibility and easy to leach out are solved.

The invention discloses a preparation method and application of a self-repairing polymer-based intelligent antibacterial antifouling coating. A reactive intelligent antibacterial functional element is introduced into an organic silicon polymer main chain, the coating is endowed with an on-demand antibacterial function, in the presence of bacteria, antibacterial molecules are protonized, the antibacterial molecules embedded in an inner cavity of cyclodextrin are changed into a separated state, and an efficient antibacterial mode is shown. Under the synergistic effect of antibacterial molecules and low surface energy of organic silicon, the antibacterial rate on escherichia coli can reach 99% or above, and the antibacterial rate on staphylococcus aureus can reach 98% or above. Besides, the self-repairing cross-linking agent is utilized, dynamic covalent bonds and multiple hydrogen bonds are introduced into a polymer network, the coating is endowed with excellent self-repairing capacity, and the repairing efficiency can reach 90% or above. The antibacterial coating prepared by the method has excellent antifouling and antibacterial properties and self-healing capability, can be widely applied to the fields of medical instruments, marine antifouling, food packaging and the like, and greatly prolongs the service life and improves the safety of the material.

The invention discloses a biliary tract stent with a positioning structure for hepatobiliary pancreatic surgery, relates to the technical field of biliary tract stents.The biliary tract stent is suitable for treating biliary tract stenosis or obstruction, and comprises a tubular stent body and the positioning structure, the positioning structure comprises a Y-shaped anchoring protrusion and a developing mark, the Y-shaped anchoring protrusion is arranged on the outer wall of the stent, and the developing mark is arranged on the outer wall of the stent. Both the cross section and the vertical section are Y-shaped, the embedding force with the inner wall of the biliary tract is remarkably enhanced, the postoperative displacement risk is reduced, the developing mark adopts iodine-doped polylactic acid or gold rings and tantalum particles, X-ray and ultrasonic bimodal developing is supported, the intraoperative positioning accuracy is improved, the stent body and the anchoring protrusions can be made of degradable materials, the degradation performance is excellent, and the stent is suitable for popularization and application. The stent is suitable for short-term implantation, does not need to be taken out through a secondary operation and is good in biocompatibility, the surface of the stent can be coated with a hydrophilic or antibacterial coating, and inflammation and infection risks are reduced. The manufacturing process adopts extrusion molding, laser cutting, injection molding, hot pressing or mechanical embedding, the process is simplified, the efficiency is high, and the method is suitable for micro bracket production.

The application relates to a cyclodextrin grafted N-cationic borneol ester polymer antibacterial material, which has the following structure: wherein x is the structural unit number of the N-cationic borneol ester, that is, the polymerization degree, x=20-100; X ‑ =F ‑ , Cl ‑ , Br ‑ or I ‑ . Meanwhile, the application also discloses a synthesis method of the polymer antibacterial material. The natural cyclic oligosaccharide antibacterial material grafted with natural active molecules has higher antibacterial activity, broad-spectrum antibacterial performance and good biocompatibility, can be applied to the biomedical field, and can be used for preparing fruit preservative materials, antibacterial coating, antibacterial fabric and other antibacterial materials.

The invention discloses a recycled PP composite material with flame-retardant and antibacterial properties and a preparation method thereof, and relates to the technical field of recycled PP composite materials. The recycled PP composite material with flame-retardant and antibacterial properties is prepared from the following raw materials in parts by weight: 60 to 75 parts of recycled PP, 15 to 25 parts of modified magnesium hydroxide, 3 to 8 parts of modified chitosan, 2 to 5 parts of ethylene-vinyl acetate copolymer, 0.5 to 1.5 parts of silane coupling agent KH-550, 8 to 15 parts of ammonium polyphosphate, 0.3 to 0.8 part of calcium stearate, 1 to 3 parts of nano titanium dioxide and 0.2 to 0.6 part of tributyl citrate. The recycled PP composite material has the remarkable advantages that the recycled PP is used as a base material, so that the environment is protected and the cost is low; through compounding of modified magnesium hydroxide, modified chitosan and the like, the flame-retardant antibacterial coating has excellent flame-retardant and antibacterial properties; the preparation process is clear and controllable, the raw material compatibility is scientific, the compatibility of the components is good, the product performance is stable, and the application prospect is wide.

The invention relates to the technical field of biomedical materials, and particularly discloses a tracheal catheter with antibacterial and lubricating functions and a preparation method thereof.According to the tracheal catheter, 2, 3-epoxypropyltrimethylammonium chloride is adopted for modifying polyethyleneimine, and the antibacterial performance of the polyethyleneimine is enhanced; then modified polyethyleneimine and tannic acid are adopted as a composite antibacterial coating, so that the tracheal catheter has good antibacterial activity on various bacteria; then N-vinyl pyrrolidone and modified fucoidin are adopted as functional monomers, ultraviolet-initiated polymerization is conducted, the hydrophilic lubricating coating is obtained, sulfuric acid groups in the hydrophilic lubricating coating are negatively charged and can attract quaternary ammonium salt cations in the antibacterial coating through electrostatic interaction, and therefore the hydrophilic lubricating coating is formed. Compared with a single polyvinylpyrrolidone (PVP) hydrophilic coating which is easy to fall off, the hydrophilic lubricating coating disclosed by the invention effectively solves the problem that the traditional hydrophilic coating is easy to fall off.

The present invention provides a method for preparing an aluminum foil packaging material and its application, which relates to the field of aluminum foil packaging technology. The method includes preparing a core layer cast plate, a barrier layer cast plate, and a functional layer cast plate; stacking the core layer cast plate, the barrier layer cast plate, and the functional layer cast plate in sequence to form a composite aluminum foil plate, hot-rolling the composite aluminum foil plate, and then conducting a preliminary aluminum foil optimal thickness determination test to determine the preliminary optimal thickness of the aluminum foil, and forming a preliminary aluminum foil after cold rolling; surface-modifying the preliminary aluminum foil and spraying a layer of antibacterial coating to form a finished aluminum foil. The present invention adopts a three-layer structural design, in which the core layer provides basic strength, the barrier layer provides aluminum foil barrier properties, including water vapor barrier properties and oxygen barrier properties, and the functional layer provides antibacterial, light barrier, and water vapor barrier functions, thereby improving the barrier properties of traditional aluminum foil and effectively blocking the penetration of water vapor, oxygen, and light. The present invention is used for packaging freeze-dried products to ensure that the freeze-dried products are not easily damp in the aluminum foil material.

The utility model relates to the technical field of coating sprayers, in particular to a sprayer for an antibacterial coating on the inner side of a milk powder can, which comprises a base, the inside of the base is of a central control structure, two sliding grooves are symmetrically formed in two sides of the top of the base, an adjusting motor is connected to the left side wall of the inside of the base, and an output shaft of the adjusting motor is coaxially connected with a bidirectional threaded rod. The two sides of the bidirectional threaded rod are symmetrically connected with two moving plates in a threaded mode, the tops of the moving plates are connected with sliding blocks, the bottoms of the sliding blocks are slidably connected with the inner walls of the corresponding sliding grooves, the inner sides of the sliding blocks are connected with moving bases, mounting grooves are formed in the inner sides of the moving bases, and arc-shaped clamping plates are fixed to the inner walls of the mounting grooves. And a spraying mechanism is arranged on the U-shaped mounting frame. According to the sprayer for the antibacterial coating on the inner side of the milk powder can, by arranging an adjusting motor, a bidirectional threaded rod, a moving plate, a sliding block, a moving seat and an arc-shaped clamping plate, the sprayer can assist in fixing the milk powder can, and therefore the position of the milk powder can is prevented from shifting in the coating process.

The invention relates to the technical field of aerogel antibacterial heat-insulating coatings, aerogel antibacterial heat-insulating patches and aerogel antibacterial heat-insulating plates, in particular to an antibacterial heat-insulating layer based on aerogel powder and antibacterial powder and a preparation method. The invention relates to an antibacterial thermal insulation material, which is a material capable of resisting bacteria and blocking part of heat transfer, can inactivate bacteria entering the material, and has a thermal insulation effect at the same time. The defects that a carbon-series antibacterial material is poor in heat insulation performance and has no flexibility are overcome. A common polymer antibacterial coating can only resist bacteria and cannot insulate heat. The multi-layer composite antibacterial heat-insulating coating prepared by matching with aerogel powder has an antibacterial function and also has a heat-insulating effect. The method has a good application prospect in the fields of medical instruments and micro-electronics at present.

The utility model discloses a fresh-keeping device for agricultural product transportation, and relates to the technical field of agricultural product transportation, the fresh-keeping device comprises a box body, a sealing cover, a phase change material layer, a humidity adjusting system, a buffer structure and an intelligent monitoring module, the box body is of a double-layer heat insulation structure, the outer layer is an EPS heat insulation layer, the inner layer is a PE layer, and the middle is filled with phase change materials; the humidity adjusting system comprises a water absorption pad located at the bottom of the box body and a breathable film located at the top of the sealing cover, the buffering structure is a supporting frame, and the surface of the buffering structure is covered with a nano-silver antibacterial coating. Through the cooperation of the double-layer heat insulation structure (EPS + PE) and the phase change material (the phase change temperature of 0-10 DEG C), the temperature in the box is kept stable in a passive mode, the respiration and microbial activity of agricultural products are inhibited, and compared with traditional normal-temperature packaging, the fresh-keeping period is prolonged by 30%-50% (for example, the fresh-keeping period of strawberries is prolonged from 3 days to 7 days). The water absorption pad (sodium polyacrylate) absorbs condensate water, redundant water vapor is discharged in combination with the BOPP anti-fog breathable film (the micropores are 0.1-1 micron), and the humidity is accurately controlled to be 85%-95%.

The utility model discloses a bacteriostatic deodorant low stretch yarn composite structure fabric, which comprises a fabric main body, a base layer, bacteriostatic layers and low stretch yarn main bodies, the base layer is arranged at the central position in the fabric main body, the low stretch yarn main bodies are uniformly arranged in the base layer, the bacteriostatic layers are arranged on both sides of the base layer, and the bacteriostatic layers are formed by interweaving bacteriostatic fibers. Yarn cores are arranged in the centers of the interiors of the antibacterial fibers, antibacterial coating layers are arranged on the outer sides of the yarn cores through first adhesive layers, odor-resistant layers are arranged on the outer sides of the antibacterial coating layers through second adhesive layers, a skin-friendly layer is arranged on the bottom side of the fabric body, and a wear-resistant layer is arranged on the top side of the fabric body. The fabric main body, the base layer and the antibacterial layer are arranged, and the odor-resistant layer and the antibacterial coating layer have a synergistic effect, so that the freshness of the fabric main body is kept by adsorbing, decomposing or inhibiting substances which generate peculiar smell.

The invention discloses an antibacterial and bacteriostatic bamboo-wood fiber-based food material packaging box and a preparation method thereof, and relates to the technical field of packaging materials. The packaging box is composed of a paper base layer and an antibacterial coating on the surface of the paper base layer. Wherein the paper base layer is made of mixed paper pulp; the antibacterial coating is obtained by coating the surface of the paper base layer with an antibacterial coating; the antibacterial coating is prepared from the following raw materials in parts by mass: 30 to 40 parts of deionized water, 2 to 2.4 parts of polyvinyl alcohol, 1.2 to 1.5 parts of glycerol, 6.7 to 7.3 parts of antibacterial particles, 0.1 to 0.4 part of rosmarinic acid and 0.5 to 0.8 part of modified silicon dioxide; the antibacterial particles are formed by mesoporous carrier materials loaded with wormwood essential oil. Due to the introduction of components such as the antibacterial particles and the modified silicon dioxide, the long-acting antibacterial, waterproof and fresh-keeping capacities of the bamboo-wood fiber-based food material packaging box are effectively improved. Therefore, the method has a wide application prospect.

The application belongs to the technical field of dental antibacterial materials, and discloses a kind of nanometer composite antibacterial coating for dental material and preparation method thereof.Method: monomer modified arginine, monomer N-isopropyl acrylamide, monomer methyl hexyl acrylate, initiator azobisdimethylamino propanamide hydrochloride, dispersing agent cetyltrimethylammonium bromide and crosslinking agent N,N-methylene bis(acrylamide) are dissolved in water, and the reaction is carried out under protective atmosphere, dialysis, to obtain nanogel dispersion;The nanogel dispersion is mixed with the nanometer zinc oxide dispersion to obtain a nanogel composite zinc oxide antibacterial coating, and a coating is formed after coating.The nanometer composite antibacterial coating for dental material has excellent retention capacity and antibacterial performance.