1816 results about "Anti bacteria" patented technology

The invention discloses a flame-retardant high-temperature-resistant fiber and a preparation method thereof, and relates to the technical field of fibers. When the flame-retardant high-temperature-resistant fiber is prepared, 1, 6-hexamethylenediamine, 1, 6-adipic acid, tetrahydrodifuran [3, 4-B: 3 ', 4'-D] furantetraone and a phosphorus-sulfur composite flame retardant are copolymerized to generate a polyamide-polyamide acid solution; 4-aminopyridine and the polyamide-polyamide acid solution are subjected to a reaction, and modified polyamide is prepared; the modified polyamide is subjected to melt spinning, and polyamide fibers are prepared; the preparation method comprises the following steps: pretreating nano titanium dioxide by using 4-bromobutyl trimethoxy silane to prepare modified nano titanium dioxide; mixing the modified nano titanium dioxide and ethanol to prepare a light-resistant antibacterial finishing agent; and carrying out post-treatment on the polyamide fiber by using an anti-light antibacterial finishing agent to prepare the flame-retardant and high-temperature-resistant fiber. The prepared fiber is excellent in comprehensive performance, particularly outstanding in flame retardance and high temperature resistance, and suitable for the fields of special protective clothing, high-temperature filtering materials and the like.

The invention provides a waterproof and windproof warm-keeping fabric and a production process thereof, and relates to the technical field of textile fabrics, the waterproof and windproof warm-keeping fabric comprises a protective surface layer, a windproof temperature-locking middle layer and a skin-friendly warm-keeping inner layer which are sequentially arranged from outside to inside, and the three layers are compounded through a gradient hot melt adhesive; the protective surface layer is a graphene oxide modified polyester fiber fabric treated by a composite hydrophobic finishing liquid; the windproof temperature-locking middle layer sequentially comprises a non-swelling environment-friendly TPU film, a polytetrafluoroethylene microporous film and a Cs0. 33WO3 modified PA6 / 66 hollow fiber net from outside to inside, and the three are laminated and compounded into an integrated structure through hot pressing; and the skin-friendly warm-keeping inner layer is a bamboo pulp fiber-cotton-skin-friendly antibacterial polyester fiber blended fabric loaded with phase change microcapsules. The fabric disclosed by the invention integrates excellent waterproof, windproof and warm-keeping properties, is suitable for outdoor and cold-proof clothes, and has both functions and comfort.

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 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 relates to the field of coatings, and discloses a biomass-based oil-resistant coating and a preparation method thereof, the coating comprises an additive solution, a paraffin solution and gallic acid; the paraffin solution is obtained by dissolving paraffin in absolute ethyl alcohol; a preparation method of the additive solution comprises the following steps: mixing chitosan powder and an acetic acid aqueous solution to prepare a chitosan solution, ultrasonically dispersing functionalized montmorillonite in deionized water to prepare a suspension, then uniformly mixing the chitosan solution and the suspension, adding modified phytic acid prepared by grafting phytic acid and ethylene glycol diglycidyl ether, and stirring to react; the functional montmorillonite is prepared by modifying modified montmorillonite with titanium dioxide and zinc oxide, then activating the modified montmorillonite with 3-aminopropyltriethoxysilane and succinic anhydride, and then carrying out a ring-opening reaction with glycidyl neodecanoate. The coating prepared by the invention has high water resistance, the Kit oil-proof grade is kept at grade 12, and the oil-proof performance of the coating is greatly improved. Meanwhile, the antibacterial performance, the tensile index and the ultraviolet aging resistance are relatively high.

The invention provides an automotive bacteriostatic polypropylene-based wood-plastic composite material and a preparation method thereof, the automotive bacteriostatic wood-plastic composite material comprises the following raw materials by mass: 90 parts of a polypropylene matrix, 20-40 parts of modified plant fiber, 5-20 parts of an inorganic filler, 1-3 parts of a lubricant, and 0.1-2 parts of an antioxidant; the modified plant fiber comprises plant fiber grafted with a graft polymer and loaded with a pyridine antibacterial agent, and the graft polymer comprises a polyunsaturated carboxylic acid chain segment and a polypropylene chain segment. The modified plant fiber has good compatibility with a polypropylene matrix and can be used for preparing a wood-plastic composite material, so that the mechanical property, the interface stability and the long-term antibacterial property of the composite material are remarkably 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 an intelligent modified atmosphere packaging film with gas selectivity and pH / humidity double response as well as a preparation method and application of the intelligent modified atmosphere packaging film. The preparation method comprises the following steps: mixing thymol emulsion and graphene oxide dispersion liquid, and stirring and reacting at room temperature in a dark place to prepare graphene oxide-thymol; the preparation method comprises the following steps: dissolving chitosan in an acetic acid aqueous solution, then adding graphene oxide-thymol and a plasticizer, and carrying out ultrasonic dispersion treatment to form a film-forming solution; and carrying out film forming treatment on the film forming solution by adopting a casting method to prepare the intelligent modified atmosphere packaging film with gas selectivity and pH / humidity double response. The prepared intelligent modified atmosphere packaging film can be modified automatically, is uniform and stable in structure, high in encapsulation efficiency, close in coordination, good in antibacterial and antioxidant activity and excellent in mechanical property and gas barrier property, can realize selective adsorption of gas, controls release of thymol by responding to changes of the pH value and humidity in the environment, and has a good application prospect. The method has a good application prospect in the field of fruit and vegetable preservation.

The utility model discloses a yarn with antibacterial, moisture-absorbing and quick-drying functions and a processing system thereof, and relates to the technical field of textile functional yarn production, the yarn comprises an antibacterial natural fiber core yarn and a moisture-absorbing and quick-drying coating layer, the moisture-absorbing and quick-drying coating layer comprises a natural fiber strip and a water-repellent natural fiber strip; the natural fiber strip and the water-repellent natural fiber strip are drawn to form a wrapping belt, and the wrapping belt is wound into a barrel shape in the width direction and wraps the outer peripheral side of the antibacterial natural fiber core yarn. The yarn can be made of all-natural plant fibers, can resist bacteria for a long time, has moisture absorption and quick drying performance, meets the use requirements of environmental protection, washing resistance and good wearing comfort, and has the advantages of being easy and convenient to process and manufacture.

The invention relates to the technical field of preparation of high-moisture-absorption warm-keeping anti-wrinkle flexible cloth, in particular to high-moisture-absorption warm-keeping anti-wrinkle flexible cloth and a preparation process thereof.According to the designed moisture-absorption skin-friendly layer, alkali decrement treatment and silane coupling agent grafting treatment are combined, and the natural antibacterial property of coffee grounds is reserved; the shape memory polymer fibers of the anti-wrinkle layer deform when the temperature is larger than or equal to the glass transition temperature, the shape is fixed after cooling, a nanometer adhesive is melted in the hot pressing process to fill gaps of a framework, and the elastic recovery rate after repeated folding is far higher than 85%. The high porosity and low heat conductivity coefficient of aerogel fibers of the warm-keeping layer are combined with the heat storage and temperature regulation functions of phase change microcapsules, so that the air permeability of the warm-keeping layer is remarkably improved; all the layers are chemically bonded through plasmas to form covalent bond combination, so that the phenomenon of layering after multiple times of water washing or bending is effectively avoided.

The invention discloses a soft shell jacket composite fabric and a preparation method thereof, and aims at solving the problem that an existing soft shell jacket fabric is poor in waterproof performance. According to the technical scheme, the fabric is characterized by comprising a waterproof layer, a warm-keeping layer and a skin-friendly layer which are sequentially arranged from top to bottom, and the skin-friendly layer is prepared from, by weight, 40-60 parts of cotton fibers, 10-15 parts of milk protein fibers, 10-25 parts of bamboo pulp fibers and 20-45 parts of antibacterial fibers; the surface of the waterproof layer is coated with a waterproof finishing agent, and a waterproof film layer is fixedly bonded to the surface of the waterproof layer. The waterproof performance of the fabric is enhanced by arranging the waterproof layer, the warm-keeping effect and comfort of the fabric can be considered by arranging the warm-keeping layer and the skin-friendly layer, the fabric is more comfortable to wear, and outdoor requirements under more conditions are met.

The invention discloses environment-friendly cassava cat litter and a preparation method thereof, and belongs to the technical field of pet supplies, and the environment-friendly cassava cat litter is prepared from the following raw materials in parts by weight: 45-55 parts of cassava starch, 20-30 parts of cassava peel, 8-15 parts of corn starch, 8-12 parts of water hyacinth fiber, 5-10 parts of bamboo fiber, 2-4 parts of propolis and 1.5-3.0 parts of mussel mucin. The raw materials are subjected to step-by-step synergistic enzymolysis and step-by-step fermentation to obtain the environment-friendly cassava cat litter. According to the mode, natural raw materials are combined, and the preparation process of step-by-step enzymolysis and step-by-step fermentation is adopted, so that the antibacterial performance and water absorption performance of the cat litter are improved, the defecation comfort and cleanliness of pet cats are improved, sanitation and health of pets and family environments are guaranteed, meanwhile, the product can be completely degraded in the natural environment after being used, and the environment is protected. The cat litter does not generate permanent solid waste like bentonite and silica gel cat litter, and is very environment-friendly.

The invention discloses continuous production equipment for antibacterial composite fabric and a composite forming method, the continuous production equipment comprises a fabric pretreatment unit, an antibacterial composite unit, a shaping and strengthening unit and a rolling unit which are connected in sequence, and each unit realizes continuous fabric conveying through a conveying assembly; the fabric pretreatment unit comprises a pretreatment bin, dust removal modules, a tension adjusting roller set and a base material flattening mechanism are sequentially arranged in the pretreatment bin in the fabric conveying direction, and the dust removal modules are high-pressure airflow spray heads symmetrically distributed on the upper side and the lower side of fabric. The base material flattening mechanism comprises two flattening scrapers capable of moving in the width direction of the fabric, and flexible rubber layers are arranged at the ends of the flattening scrapers. By integrating continuous production equipment and an optimized composite forming process, efficient and stable production of the antibacterial composite fabric is achieved, the product has excellent antibacterial performance, mechanical performance and functional diversity, the production process is environmentally friendly and controllable, and certain application value is achieved.

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 the technical field of coatings, and discloses a carbon nanotube modified acrylic resin coating and a preparation method thereof. The coating disclosed by the invention is prepared from the following raw materials in parts by weight: 100 parts by weight of a carbon nanotube modified water-based acrylic resin emulsion, 0.5 to 0.8 part by weight of a dispersing agent, 8 to 10 parts by weight of deionized water, 0.1 to 0.3 part by weight of a de-foaming agent, 5 to 7 parts by weight of a coalescing agent, 0.1 to 0.3 part by weight of a rheological agent and 0.8 to 1 part by weight of a flatting agent. A physical-chemical cross-linked network structure is formed in the coating by utilizing a long-chain structure and a dialkenyl structure contained in the functionalized carbon nano tube, and the physical-chemical cross-linked network structure and the uniformly dispersed carbon nano tube synergistically improve the mechanical property of the material, and imidazole quaternary ammonium salt and thymol structures contained in the functionalized carbon nano tube synergistically improve the antibacterial property of the material. The paint prepared by the invention has a relatively wide application value in the fields of furniture, woodware, automobile industry and the like.

The invention relates to the field of color-coated sheet processing, in particular to a pretreatment device for a coiled material for spraying a rare-earth antibacterial color-coated sheet, and aims to solve the problem that oil stains on the surface are not thoroughly cleaned during pretreatment of the coiled material for spraying the color-coated sheet in the prior art. A pressing roller used for pressing the coiled material into the cleaning pool is rotationally connected into the cleaning pool. The cleaning mechanism is arranged in the cleaning pool and used for cleaning oil stains on the front face and the back face of the coiled material immersed in the cleaning liquid. The cleaning mechanism comprises two side plates arranged on the inner walls of the two sides of the cleaning pool, a plurality of cleaning frames installed between the two side plates and driving pieces installed on the side plates and used for driving the cleaning frames to move in the width direction of the coiled materials in a reciprocating mode when the pressing rollers rotate. When the coiled material moves in the cleaning liquid, oil stains on the front and back surfaces of the coiled material are scrubbed through the cleaning mechanism, so that the oil stain cleaning effect is effectively improved.

The invention relates to the technical field of magnetic therapy mattresses, and discloses a rare earth permanent magnet-graphene composite antibacterial intelligent temperature control magnetic therapy mattress, which comprises a bottom supporting substrate, a magnetic therapy mattress assembly is arranged on the bottom supporting substrate, and the magnetic therapy mattress assembly comprises a supporting buffer layer, a magnet mounting layer, a mesh coating and an antibacterial surface layer. The supporting buffer layer is fixedly connected to the upper surface of the bottom supporting substrate, the supporting buffer layer is graphene modified memory sponge, and the magnet mounting layer is bonded to the upper surface of the supporting buffer layer through full-area thin glue; through the multifunctional collaborative design that the supporting buffer layer is matched with the human body, the rare earth permanent magnet provides a uniform magnetic field, the graphene heating film controls the temperature in a partitioned mode, the graphene fabric is resistant to bacteria, and the edge covering strips are fixed, the mattress meets the basic requirement for comfortable lying, and integrates the additional functions of magnetic therapy health care, intelligent temperature control, antibacterial cleaning and the like; the device is suitable for various scenes such as household daily use and rehabilitation assistance.

The invention discloses a high-temperature-resistant inorganic antibacterial ceramic glaze and a preparation process, and relates to the technical field of ceramic glaze preparation, the glaze is composed of a basic glaze and a zinc oxide-doped cerium dioxide inorganic antibacterial agent, and the basic glaze comprises feldspar, quartz, kaolin, calcite and talc. The preparation process comprises the following steps: mixing the raw materials, carrying out wet ball milling, adding the antibacterial agent and the dispergator, stirring at a high speed, sieving to remove iron, aging, glazing and sintering at a high temperature. In the process, an iron removal integrated unit integrating a two-stage vibration screening function and an automatic iron scraping function is adopted, and efficient and continuous iron removal operation is achieved. The obtained glaze can resist high-temperature sintering of 1150-1200 DEG C, the glaze surface is smooth and uniform, the glaze surface has lasting and efficient broad-spectrum antibacterial performance, glaze surface defects caused by iron impurities are effectively avoided, and the product yield and quality stability are improved.

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 provides a color-coated steel plate with heat-insulating, antibacterial and super-hydrophobic functions, which comprises a metal substrate, and a chemical conversion layer and a primer layer which are sequentially arranged on at least one surface of the metal substrate, and a composite functional finish paint layer is arranged on the primer layer; the composite functional finish paint layer comprises film-forming resin, a near-infrared reflection composite pigment, a dual-mode antibacterial agent and fluorinated nano silicon dioxide; the finishing coat layer in the color-coated steel plate has heat-insulating and antibacterial capabilities and a super-hydrophobic self-cleaning function at the same time; the invention also provides a preparation method of the color-coated steel plate, which comprises the following steps: carrying out surface pretreatment on the metal substrate to form the chemical conversion layer; coating the chemical conversion layer with a primer and carrying out first curing to form a primer layer; the primer layer is coated with finish paint coating, then multi-temperature-zone gradient curing is conducted, and a composite functional finish paint layer is formed; according to the preparation method, a multi-temperature-zone gradient curing process is adopted, the temperature of different curing stages is controlled, and a stable functional structure is constructed.

The invention discloses a carbon quantum dot-polyvinyl alcohol composite film and a preparation method thereof, and belongs to the technical field of food packaging fresh-keeping materials. The composite film is prepared by taking apocynum venetum carbon quantum dots and polyvinyl alcohol as raw materials under the action of a plasticizer, wherein the apocynum venetum carbon quantum dots are prepared from apocynum venetum fiber powder, dithiosalicylic acid and urea through a hydrothermal method. The composite film provided by the invention has excellent ultraviolet shielding, pH-responsive fluorescence discoloration, antibacterial and antioxidant properties, and can realize visual monitoring of the freshness of high-protein food. The preparation method disclosed by the invention is simple in process, environment-friendly, suitable for the field of food active packaging and wide in application prospect.

The invention relates to the technical field of food fresh-keeping materials, and discloses a preparation method of an intelligent response degradable fruit and vegetable fresh-keeping film based on a Janus structure, the intelligent response degradable fruit and vegetable fresh-keeping film comprises a hydrophobic layer and a hydrophilic layer, the hydrophobic layer is an electrostatic spinning film formed by compounding eugenol-loaded ZIF-8 nano-particles and polylactic acid, and the hydrophilic layer is an electrostatic spinning film formed by compounding eugenol-loaded ZIF-8 nano-particles and polylactic acid. The hydrophilic layer is an electrostatic spinning membrane formed by compounding chitosan and gelatin, the surface of the hydrophobic layer is covered with the hydrophilic layer through an electrostatic spinning technology, the ZIF-8 nanoparticles are synthesized through a room-temperature stirring method, and synthesis raw materials are a 2-methylimidazole methanol solution and a zinc nitrate methanol solution. By means of the pH response characteristic of the ZIF-8 nano-particles, pH value change signals generated in the early stage of fruit and vegetable putrefaction can be sensitively captured, loaded antibacterial components are accurately released through ZIF-8 framework dissociation, targeted inhibition on putrefying bacteria is achieved, passive protection is converted into active intervention, the fruit and vegetable putrefaction process is effectively delayed, the fresh-keeping effect is improved, and the fresh-keeping time is prolonged.

The invention belongs to the technical field of degradable packaging materials, and discloses a preparation method of a degradable preservative film. The anti-fog antibacterial plastic is prepared from the following raw materials in parts by weight: 40 to 45 parts of poly (butylene adipate-co-terephthalate) (PBAT), 8 to 12 parts of polylactic acid (PLA), 28 to 32 parts of modified structural starch, 4 to 6 parts of poly (butylene carbonate) (PBC), 4 to 6 parts of talcum powder, 0.4 to 0.6 part of aluminate, 0.8 to 1.2 parts of a composite antibacterial agent and 2.5 to 3.5 parts of anti-fog master batch. The invention aims to overcome the defects in the prior art, and provides the degradable preservative film and the preparation method thereof, the preservative film not only has good degradability and mechanical properties, but also has excellent antibacterial and antifogging effects, and the preparation process is simple and easy for industrial production.

The invention discloses a medical bio-based high-toughness waterproof breathable polyurethane film and a preparation method thereof. The film sequentially comprises a compact bottom layer, a reinforced breathable middle layer and a compact upper layer, the enhanced breathable middle layer is a melt-blown superfine fiber non-woven fabric; the compact upper layer and the compact bottom layer are antibacterial modified bio-based polyurethane film layers. The preparation method comprises the following steps: preparing antibacterial bio-based polyurethane slurry; coating a bottom layer; laying a middle layer; coating and compounding an upper layer; drying and hot-pressing shaping; and post-processing. The hydrostatic pressure resistance of the obtained film is gt; the HO is 75 cm, and the water vapor permeability is gt; the tensile strength gt is 4000 g / m.24 h; the tearing strength is gt; the antibacterial rate gt is 600 mN; the medical film integrates breathability, toughness and waterproofness, is excellent in comprehensive performance, and can meet the use requirements of the medical film.

The invention discloses a water treatment filtering material and a preparation method thereof, and relates to the technical field of filtering materials. When the water treatment filtering material is prepared, firstly, acrylonitrile, itaconic acid and ethylene 2-(methacryloyloxy) ethyl phosphate are copolymerized to prepare copolymerized modified polyacrylonitrile; the preparation method comprises the following steps: carrying out hydrothermal reaction on a copper source and tetrabutyl titanate, and calcining to obtain copper-doped nano titanium dioxide; the copper-doped nano titanium dioxide and KH-550 are subjected to a reaction, and modified nano titanium dioxide is prepared; carrying out electrostatic spinning on the copolymerized modified polyacrylonitrile, and carrying out nano-spray loading on the modified nano titanium dioxide to prepare a modified polyacrylonitrile fiber membrane; and reacting the modified polyacrylonitrile fiber membrane in a covalent organic framework growth solution to prepare the water treatment filtering material. The prepared water treatment filtering material has the advantages of being antibacterial, anti-pollution, high in filtering efficiency and long in service life.

The invention relates to the technical field of polyester degradable plastics, and discloses a biodegradable shrink film as well as a preparation method and application thereof. The preparation method of the biodegradable shrink film comprises the following steps: reacting (R)-3-hydroxybutyric acid with 1, 4-dibromobutane to obtain a dihydric alcohol monomer; the preparation method comprises the following steps: copolymerizing a dihydric alcohol monomer and L-lactide to obtain modified polylactic acid; carrying out copolymerization on the geraniol-based compound and L-lactide to obtain a bio-based plasticizer; modifying the bio-based plasticizer with allyl trimethyl ammonium chloride to obtain a modified bio-based plasticizer; the biodegradable shrink film is prepared by taking modified polylactic acid, poly (butylene adipate-co-terephthalate), a modified bio-based plasticizer, a functional filler and palm wax as raw materials. The biodegradable shrink film has the advantages of flexibility, shrinkage performance, lasting antibacterial performance and good barrier performance, and can be used in food packaging materials.

The invention relates to the technical field of building glazed tiles, in particular to an antibacterial glazed tile and a preparation method thereof.The antibacterial glazed tile comprises a green body layer and an antibacterial glaze layer which are sequentially arranged from bottom to top; wherein the antibacterial glaze layer is obtained by calcining antibacterial glaze; the antibacterial glaze is prepared from the following raw materials: high-temperature antibacterial frit, calcined kaolin, corundum, quartz, dolomite, calcined talc, strontium carbonate, wollastonite, potassium feldspar and albite; the high-temperature antibacterial frit is prepared from the following raw materials: zirconium silicate, a silver antibacterial agent, calcined aluminum oxide, calcined talc, quartz, wollastonite, kaolin, calcium phosphate, potassium feldspar, albite, boric acid and lithium carbonate. According to the antibacterial glazed tile and the preparation method thereof provided by the invention, the formula of the antibacterial glaze is optimized, so that the antistatic property and the corrosion resistance can be improved on the premise of ensuring the antibacterial property of the antibacterial glazed tile.

A vehicle-mounted pet house comprises a house body, and a house pad is arranged at the bottom of the inner side of the house body; the four detachable side pillows are uniformly distributed above the nest pad and are connected with the inner surface of the nest body; the prone sleeping pillow is separably arranged at the top of the nest pad; the straps are symmetrically arranged and are fixed on the outer surface of the house body; the vehicle-mounted pet house mat is novel in structure and ingenious in conception, has the advantages of antibiosis and mite prevention, is beneficial to health of pets, easy to clean and maintain and convenient to use, can be placed in a vehicle to carry the pets when people go out, and can be used for carrying the pets to go out when people walk due to the design of the straps on the two sides. A hidden zipper is arranged on the bottom side of the outer sleeve to prevent the pet from being hurt by the pet hair hooked by the zipper. Through the arrangement of the prone sleeping pillow, a pet can lie prone to have a rest, better comfort is achieved, and the vehicle-mounted nest is safer due to the design of the safety buckle of the woven belt and the automobile seat and the connection of the woven belt and the headrest of the automobile seat.

The invention provides an antibacterial high-barrier starch-based plastic bottle and a preparation method thereof.The preparation method comprises the steps that firstly, titanate generates nano titanium dioxide in situ in starch through acid catalysis, starch is subjected to in-situ hybridization modification, and nano titanium dioxide in-situ hybridization starch is prepared; then adding nano inorganic barrier powder, and then adding a long-chain silane coupling agent to modify the nano titanium dioxide in-situ hybridized starch and the nano inorganic barrier powder to obtain a modified starch compound; performing vacuum kneading and drying until the water content is lower than 0.5%, and adding an antibacterial lubricant for plasticizing to obtain a plasticized material; and finally, carrying out melt blending and granulation with polyolefin resin, and carrying out extrusion blow molding. The environment-friendly and low-cost starch-based material is kept, meanwhile, the comprehensive performance of the product is remarkably improved, the surface contact angle of the product is 110 degrees or above, the antibacterial rate is 97% or above, and the oxygen permeation amount and the water vapor permeation amount are 100 cm / (m.24h. Atm) and 4 g / (m.24h) or below respectively.

The application provides a silver-loaded antibacterial polyacrylonitrile-based activated carbon fiber and a preparation method thereof, and belongs to the technical field of carbon fibers, and comprises the following steps: S1, chitosan solution preparation; S2, silver nitrate-chitosan solution preparation; S3, preparation of polyacrylonitrile fiber loaded with silver ions-chitosan on the surface; S4, pre-oxidation; S5, treatment of the pre-oxidized fiber; S6, carbonization and activation; and S7, drying.The silver ions-chitosan solution is used to uniformly load silver ions on the surface of the polyacrylonitrile fiber, the concentration of the silver ions-chitosan solution is 0.5-5 wt%, the surface pore size and distribution of the prepared activated carbon fiber can be controlled by the concentration of the acid solution, and the activated carbon fiber is rich in pore size and uniform in pore distribution, and the specific surface area is 800-1600 m 2 / g.