858 results about "Antibacterial effect" patented technology

The invention provides an intelligent evaluation method and system for the antibacterial effect of a water matrix standard substance, and relates to the technical field of intelligent evaluation, and the method comprises the following steps: preparing a bacterial suspension in a logarithmic phase and checking turbidity; preparing a water matrix standard substance and a control solvent, and obtaining a baseline parameter set; setting inoculum size and incubation conditions, determining the antibacterial efficiency in parallel, and performing image segmentation correction on sticky colonies to obtain an original observation set; establishing a deviation transfer relationship, correcting the original data, and forming an endpoint quantization set; and the bacteriostatic validity is output through evidence fusion, and a supplementary experiment is carried out on a critical condition. According to the method, the accuracy and reliability of bacteriostatic effect evaluation of the water matrix standard substance are improved.

The invention relates to a double-layer preservative film for prolonging the shelf life of frozen beef and mutton after unfreezing and a preparation method of the double-layer preservative film. According to the preparation method of the angelica dahurica extract-gliadin nano-particles, the angelica dahurica extract-gliadin nano-particles can be used for preparing a double-layer preservative film, and the preservative film is a natural component and is environmentally friendly and safe. The preservative film is of a double-layer structure, the mechanical performance is enhanced through the double-layer film structure, and meanwhile the preservative film has excellent oxygen and water vapor barrier performance and an antibacterial effect. According to the preservative film disclosed by the invention, slow release of active ingredients is realized by utilizing the Pycnogenin-gliadin nanoparticles, so that the antioxidant and antibacterial effects are remarkably improved, and the quality guarantee period of meat is prolonged. In addition, the preservative film does not need to be in direct contact with food in practical application, potential safety hazards of the food are further reduced, the operation process is simplified, pollution is avoided, a user can conveniently use the preservative film, the preservative film has the advantages of efficient preservation and environmental protection, and the preservative film has good application prospects and value.

The invention relates to the field of plastic films, and particularly discloses a bio-based antibacterial cool-feeling breathable film and a preparation method thereof. The bio-based antibacterial cool-feeling breathable film is prepared from the following raw materials in percentage by weight: 49 to 66.5 percent of matrix resin, 30 to 40 percent of pore-foaming agent, 1 to 3 percent of silane modified cellulose nanofiber, 1 to 2 percent of antibacterial agent, 1 to 5 percent of composite cool-feeling agent and 0.5 to 1 percent of auxiliary agent, the matrix resin comprises PBAT resin and PLA resin in a mass ratio of (7: 3)-(5: 5); the composite cool feeling agent comprises nano aluminum nitride and graphene in a mass ratio of (5-15): 1. The bio-based antibacterial cool-feeling breathable film can be used for medical dressings, disposable medical supplies, mother and baby products and the like, and has the advantages of being good in breathability and moisture penetrability, high in antibacterial capacity, lasting in antibacterial effect, high in mechanical strength, high in cool-feeling coefficient, comfortable to wear and not prone to stuffiness.

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 provides a heat-storage warm-keeping down-locking layered fabric and a down jacket. The heat-storage warm-keeping down-locking layered fabric sequentially comprises a skin-friendly layer, a liner cloth layer and a heat-storage warm-keeping down-locking layer from inside to outside, and the heat-storage warm-keeping down-locking layer is prepared by napping a heat-storage warm-keeping fabric; yarns for weaving the heat-storage and warm-keeping fabric are heat-storage and warm-keeping fiber / hollow polyester fiber / wool fiber blended yarns; the heat-storage warm-keeping fiber comprises polyester and a heat storage agent, and the preparation method of the heat storage agent comprises the following steps: firstly loading a polyethylene glycol / nano molybdenum disulfide composite material by adopting porous silicon dioxide microspheres, then mixing with a mixture containing silica sol and nano metal silver, and performing vacuum drying to obtain the heat storage agent. The heat-storage warm-keeping down-locking layered fabric has excellent heat-storage warm-keeping effects, can lock down, has a good antibacterial effect, and has a very good application effect when being used as a lining fabric of a down jacket.

The invention belongs to the technical field of bioengineering medicines, and particularly relates to a gel dressing for repairing skin wounds and a preparation method of the gel dressing. The anti-fouling coating is prepared from the following raw materials in parts by weight: 65 to 75 parts of polyvinyl alcohol, 14 to 20 parts of sodium alginate, 4 to 8 parts of sodium carboxymethyl cellulose, 1 to 3 parts of sodium hyaluronate, 12 to 22 parts of glycerol, 1 to 3 parts of surface anti-fouling additive, 6 to 10 parts of antibacterial microcapsule and 2 to 2.8 parts of compound ion. According to the invention, a PVA freeze-thaw physical network and an alginic acid Ca / Zn composite ion network cooperate to limit a pore channel, so that stable forming is realized; a chitosan / sodium tripolyphosphate microcapsule is prepared from polyhexamethylene biguanide hydrochloride and covered with sodium alginate, release sensitive to pH / ionic strength, acceleration in an inflammation stage and self-limiting in a later stage are constructed, and long-acting bacteriostasis is formed by SA-Zn site slow release; the stability and staged adaptation are highlighted through processes such as encapsulation, low-shear doping and the like and raw material synergy.

The invention relates to the technical field of high polymer material processing and coating, in particular to an acrylic plate antifouling and antibacterial enhancing method based on a nano-composite coating, which comprises the following steps: S1, pretreating the surface of an acrylic plate; s2, preparing a nano composite coating; s3, coating: coating the surface of the acrylic plate with the activated surface with the nano-composite coating liquid, adopting a spin-coating method for coating, determining the spin-coating speed through an early test so as to control the thickness of the coating, checking the uniformity of the coating through vision after coating, and re-coating if non-uniform parts exist, in the coating process, the environment humidity is monitored through a humidity sensor and controlled at a low level so as to prevent coating defects, and the acrylic plate coated with the nano composite coating is obtained; and S4, coating curing. The antifouling and antibacterial effects of the coating are comprehensively evaluated by means of contact angle measurement, dirt adhesion experiments and the like, and the concentration or spin-coating speed of the nano material is adjusted according to a test result, so that the performance of the coating is further optimized.

The invention discloses an oral dispersion liquid composition capable of effectively inhibiting bacteria, and relates to the technical field of nano-emulsion / micro-capsule suspension liquid. Aiming at the problems of transient antibacterial effect, strong irritation and poor dispersibility of the traditional oral care product, the composition is prepared by adopting a nano-emulsion and micro-capsule technology. A bacteriostatic agent (such as nano-silver and thyme volatile oil) is wrapped in urea formaldehyde microcapsules through an interfacial polymerization method, and protection and controlled release of active ingredients are achieved. The nano-emulsion is prepared by compounding Span and Tween emulsifiers, so that high dispersity and permeability are ensured; tea polyphenol is added as an antioxidant, so that the stability is enhanced. The preparation method comprises the steps of nano-emulsion preparation, active ingredient microencapsulation, disperse system construction and sterilization filling, and the particle size D90 of a final product is smaller than or equal to 200 nm. The composition has a lasting antibacterial effect, good stability and safety, and is suitable for oral health maintenance.

The invention discloses a polyurethane coating and a preparation method thereof, and belongs to the technical field of antibacterial coatings. The preparation method of the polyurethane coating comprises the following steps: carrying out acyl chloride substitution reaction on a phenolic substance and a chlorine donor to obtain an intermediate reactant, and carrying out conjugate addition reaction on the intermediate reactant and an amine substance with hydroxyl groups at two ends to obtain antibacterial diol; reacting the antibacterial diol with isocyanate to obtain a polyurethane coating; the phenolic substance is selected from at least one of thymol, carvacrol, paeonol, catechol and theaflavin. The antibacterial coating is applied to the aspect of an antibacterial coating of a food contact part, the problem that the antibacterial property of an existing antibacterial coating is difficult to last is solved, and the antibacterial coating has the synergistic antibacterial effect of killing and defending bacteria.

A device for relieving migraine symptoms comprises a straight pipe and a cylinder, the left side of the straight pipe communicates with the right side of the cylinder, the left side of the cylinder is connected with a compression structure, the right side of the outer wall of the straight pipe is connected with a control structure, the right side of the control structure is connected with a curved block, and the left side of the compression structure is connected with a grip. The outer wall of the compression structure is attached to the inner wall of the straight pipe. In the control structure, the inner wall of the sleeve and the right side thread of the outer wall of the straight pipe are fixed in a threaded mode, then the curved block is inserted into the ear canal, the protection pad is attached to the outer side of the ear canal, the curved block can be prevented from being inserted too deep, and the protection pad can be tightly attached to the outer side of the ear canal through the colored cotton material of the protection pad to guarantee sealing; meanwhile, the device has an antibacterial effect and good skin-friendly property, so that the comfort of ears is ensured, the use safety of the device for relieving the migraine symptom is improved, and the normal use of the device for relieving the migraine symptom is ensured.

The invention discloses a preparation method of a rare earth ion doped antibacterial modified hydroxyapatite whisker material, and relates to the technical field of medical biomaterials.The preparation method comprises the steps that acetamide is dissolved in deionized water, and a solution A is obtained; dissolving calcium salt, cerium salt and ammonium salt in a certain proportion in the solution A to obtain a solution B; stirring the solution B at room temperature, performing ultrasonic dispersion, and adjusting the pH value to be acidic to obtain a solution C; and putting the solution C into a high-pressure reaction kettle, heating and reacting, aging, cleaning, carrying out suction filtration, and drying to obtain the cerium-doped hydroxyapatite whisker material. The preparation process is simple, the product is stable, and the prepared modified hydroxyapatite whisker has an obvious antibacterial effect on escherichia coli and staphylococcus aureus and can be applied to the field of bone repair antibacterial materials.

The invention discloses antibacterial ceramic glaze and a preparation method thereof, relates to the technical field of ceramic glaze, and solves the problems that part of ceramic glaze is poor in antibacterial effect, the mechanical strength of the glaze surface is relatively low, and the production process is relatively tedious. The invention discloses antibacterial ceramic glaze and a preparation method thereof. The antibacterial ceramic glaze comprises the following components in parts by weight: 25-45 parts of potassium feldspar, 5-10 parts of nano yttrium-doped zirconium oxide, 3-10 parts of a lanthanide silver composite antibacterial agent, 7-25 parts of a fluxing agent, 1-7 parts of a wear-resistant reinforcing agent, 2-6 parts of an adhesive and 20-50 parts of deionized water. According to the invention, the nano yttrium-doped zirconium oxide and the lanthanide silver composite antibacterial agent are added into the glaze for cooperation, so that rare earth metals yttrium, lanthanum and silver in the glaze have a synergistic effect, the produced glaze can form a stable antibacterial phase at a high temperature, and meanwhile, the mechanical strength of the glaze surface is remarkably improved by the nano zirconium oxide.

The present invention discloses a washable electric heating blanket core, and belongs to the field of electric blankets; wherein the washable electric heating blanket core comprises a blanket core and a controller connected to the blanket core by means of a wire, wherein the blanket core is woven from a yarn base material and a heating element, the heating element is composed of heating yarn, and the heating yarn is made of graphene yarn, carbon nanotube yarn, or silver-plated yarn; and positive conductive wires and negative conductive wires are arranged on an upper surface of the blanket core; when the heating yarn employs the graphene yarn or the carbon nanotube yarn, and when the heating yarn employs the silver-plated yarn, the antibacterial effect can be enhanced; wherein the electric heating blanket core can be used in different application scenarios such as blankets and carpets, and is widely used.

The invention discloses a polymer composite material based on artemisinin modification, which is characterized in that the polymer composite material comprises organic silicon polyurethane modified by an artemisinin compound and organic silicon polyurea, and the mass ratio of the organic silicon polyurethane modified by the artemisinin compound to the organic silicon polyurea is (2-1): (1-2). The coating is high in hardness, good in mechanical performance, low in elastic modulus, good in stain removal effect and good in adhesion performance, can be stably attached to a substrate and is not prone to falling off, meanwhile, has an excellent antibacterial effect, is not prone to being hydrolyzed by water in seawater or air in the using process on the premise that all the conditions are met, is good in water resistance and can be widely applied to the field of water treatment. Therefore, the long-term stability of the composite coating is ensured, the comprehensive performance of the coating can be comprehensively improved, and the marine antifouling coating serving as an environment-friendly marine antifouling coating has a good application prospect.

The invention provides an alginate fiber sanitary towel and a preparation method thereof, and belongs to the technical field of nursing materials. Through the directional water-repellent design of the double-sided reverse osmosis prevention functional layer and in combination with the three-dimensional leakage-proof partition edge structure, the risks of liquid back seepage and side leakage are remarkably reduced, and the use dryness and reliability are improved; the natural antibacterial effect of the alginate fibers is utilized, efficient peculiar smell control is achieved, irritation of traditional chemical bacteriostatic agents to the skin is avoided, and biological safety is guaranteed; the core material adopts alginate fiber renewable resources, the characteristics of high water absorption and degradability of the alginate fiber absorber are combined, the environmental protection sustainability of the product is enhanced, the common problems of reverse osmosis, side leakage, dependence on chemical addition and the like of the sanitary towel are solved, meanwhile, the unification of the protection performance, the health attribute and the sustainability is achieved through material and structure innovation, and the sanitary towel is suitable for being used for sanitary napkins. And a technical normal form capable of being flexibly expanded is provided for the industry.

The invention discloses a bacteriostatic composition and an application thereof in a hand sanitizer, the bacteriostatic composition comprises the following components by mass: 3-5% of lysozyme, 4-8% of an enzyme protection system, 8-12% of a plant bacteriostatic extract, 10-15% of a biological matrix carrier, 5-8% of a stable protection system, and the balance of water. According to the antibacterial composition, a three-dimensional network structure is formed through the carboxymethyl chitosan-sodium alginate compound, a protective layer with good biocompatibility can be formed on the skin surface, and the skin retention time of lysozyme and plant antibacterial active ingredients is remarkably prolonged. According to the invention, lysozyme and plant antibacterial components are adopted to form multiple antibacterial mechanisms: the lysozyme specifically hydrolyzes peptidoglycan in bacterial cell walls, and active components in the plant antibacterial extract destroy bacterial cell membranes and inhibit bacterial metabolism. The double-attack mechanism has a stronger antibacterial effect than a single component, and can prevent bacteria from generating drug resistance at the same time.

The invention relates to an anti-dandruff composition, a preparation method thereof and application of the anti-dandruff composition in shampoo products, and belongs to the technical field of washing care, and the anti-dandruff composition comprises the following raw materials: a plant bacteriostatic component, an oil control component, a moisturizing component, an emulsifier and a solvent. According to the application, the humulus lupulus flower extract, the phryma leptostachya extract and the inula flower heterocyst chrysanthemum extract are compounded to serve as plant bacteriostatic components, so that microbial florae causing the dandruff problem are effectively inhibited from growth and reproduction and killed, and the prepared composition has a prominent bacteriostatic effect; besides, the C10-15 alkanol polyether sodium sulfate, the capryloyl glycine, the potassium azelaic diglycinate and the coconut oil acyl hydrolyzed oat protein potassium are combined to be used as oil control components, and can be started from different aspects of removing dirt and grease, reducing grease secretion, inhibiting oil gloss and relieving scalp respectively, so that the prepared composition has an oil control effect. The raw materials selected under the design of the invention integrate antibacterial and oil control functions, and can also show a chip removal effect.

The invention discloses an electrode material for purifying and disinfecting drinking water as well as preparation and application thereof, and belongs to the technical field of drinking water purification. An Ag nano structure and an Au nano structure are sequentially constructed on a plastic base material, the electrode material is endowed with excellent antibacterial and catalytic performance, the Ag nano structure is formed through acid treatment and precursor solution soaking, and the preliminary antibacterial performance is endowed; the antibacterial effect is enhanced by micro-emulsion soaking; the microemulsion A and the solution B are mixed to prepare a spraying solution, a stable Au nanostructure is formed after spraying, an electrochemical oxygen reduction reaction is promoted, the H2O2 generation efficiency is improved, hydroxyethyl ethylenediamine triacetic acid and acrylamide are used in cooperation, the Au dosage and the complexing temperature are adjusted, a microcosmic honeycomb structure is formed, and the H2O2 concentration is remarkably improved. The electrode material has antibacterial performance, also has excellent conductivity and catalytic activity, is stable in purification effect before and after use, can be repeatedly used, and has wide application prospects in the fields of drinking water purification and the like.

The invention relates to a bacteriostatic washing machine tank cleaning block composition and a preparation method thereof, and the bacteriostatic washing machine tank cleaning block composition comprises the following components: peroxide salt, a surfactant, a chelating agent, an acid substance, modified silicon dioxide, an active oxygen activator, a release agent, an adhesive, a filler and water; wherein the modified silicon dioxide is obtained by firstly hydroxylating silicon dioxide, then carrying out esterification reaction with hexadecenoic acid and linolenic acid, and finally polymerizing with sodium acrylate. The modified silicon dioxide can generate mechanical friction with stubborn dirt to promote the dirt to fall off, a high-crosslinking-degree net-shaped organic chain segment formed on the surface of the modified silicon dioxide has amphipathicity, after the modified silicon dioxide is compounded with the surfactant and other components, a synergistic effect is generated to improve the decontamination effect, the compatibility of all the components can be improved, and the cleaning effect is improved. Falling stubborn dirt can be wrapped, and the decontamination effect is further improved; all the components are compounded, so that a good antibacterial effect and the like are achieved, and a good prospect is achieved.

The invention relates to the technical field of polymer composite materials, in particular to a degradable PPC-based composite film as well as a preparation method and application thereof. The degradable PPC-based composite film is prepared from polypropylene carbonate, bamboo powder and vinyl trimethoxy silane. Polypropylene carbonate (PPC) is adopted as a base material, bamboo powder is combined for filling, the prepared composite film can be completely degraded after being buried in natural soil for 5 months, and degradation products of the composite film do not pollute the environment; the bamboo powder is adopted as a reinforcing filler, has a certain bacteriostatic effect, and can be used for delaying the growth of microorganisms on the surface of food and improving the food safety and the fresh-keeping effect if being applied to the food fresh-keeping film. Compared with a pure PPC film, the composite film disclosed by the invention is improved in the aspects of mechanical property, thermal stability and glass transition temperature, and shows more excellent comprehensive performance.

The preparation process comprises the following steps: mixing a modified monomer, acrylic acid, butyl acrylate, hydroxyethyl acrylate, azodiisobutyronitrile and acetone to react to prepare a functional prepolymer, mixing and stirring the functional prepolymer and the acetone, adding dibutyltin dilaurate and a modifier, reacting, then adding an initiator, and reacting to obtain the high-gloss antibacterial UV veneer. The functional coating is smeared on the surface of the shaving board, and ultraviolet irradiation curing is carried out, the modified monomer is of a hyperbranched structure, when the modified monomer is polymerized with other monomers, polymer molecules are changed into the hyperbranched structure from the original chain structure, and then the strength of a paint film is enhanced; a molecular chain segment contains an organic silicon chain segment, the service life of a surface paint film is prolonged, a quaternary ammonium salt structure of a side chain has positive electricity and can adsorb bacteria, cell membranes are damaged, the antibacterial effect is achieved, meanwhile, the glossiness of the surface of the paint film is improved through nanometer titanium dioxide, and the attractiveness of the veneer is guaranteed.

The invention discloses an antiskid antibacterial ceramic tile and a preparation method thereof, and belongs to the technical field of ceramic materials. Through the unique design of the green body layer, the composite functional layer and the surface treatment layer, the anti-skid and antibacterial ceramic tile achieves good anti-skid and lasting antibacterial performance. The raw material formula of the green body layer, such as kaolin, silicon carbide micro powder and the like, is reasonably proportioned, so that the basic strength and stability of the ceramic tile are ensured. In the composite functional layer, zinc phosphate coated nano-zinc oxide and silver-loaded zeolite are key antibacterial materials, and the ceramic tile has an efficient and lasting antibacterial effect under the combined action of the zinc phosphate coated nano-zinc oxide and the silver-loaded zeolite. The surface treatment layer is formed by carrying out gradient concentration treatment on anti-skid liquid containing an organic metal framework material, the anti-skid antibacterial ceramic tile solves the problems that a traditional ceramic tile is insufficient in anti-skid performance and not lasting in antibacterial effect, can be widely applied to various public places and home decoration, and provides a safe and sanitary living and working environment for people.

The invention discloses a fabric antibacterial performance evaluation method and system, and relates to the technical field of antibacterial data processing. The method for evaluating the antibacterial performance of the fabric comprises the following steps: acquiring a bacterial data set after bacterial culture of a to-be-evaluated sample fabric; performing primary evaluation on the to-be-evaluated sample fabric based on the bacterial data set, and screening out primarily-screened sample fabric qualified in primary evaluation; acquiring physical characteristic data of the primarily screened sample fabric, and analyzing and screening a final qualified sample fabric based on the physical characteristic data; the fabric antibacterial evaluation qualification rate is determined based on the ratio of the sample fabric to the to-be-evaluated sample fabric, preliminary screening is performed, and the antibacterial effect of the fabric can be preliminarily determined; the physical characteristic data of the primarily screened sample fabric is obtained, the finally qualified sample fabric is screened out through physical characteristic data analysis, and the fabric antibacterial evaluation qualification rate is determined, so that the problems of incomplete data and insufficient accuracy in the fabric antibacterial effect evaluation process are effectively solved, and the scientificity and objectivity of antibacterial performance evaluation are enhanced.

The invention relates to the technical field of wet tissues, in particular to an antibacterial sanitary wet tissue and a preparation method thereof. The antibacterial sanitary wet tissue comprises a fiber substrate and antibacterial liquid. The wet tissue is free of alcohol and quaternary ammonium salt, safe to use and suitable for nursing people with sensitive skin and infants. Glycerin, butanediol, panthenol, allantoin and sodium hyaluronate have a synergistic effect, and moisturizing and skin barrier repairing are provided. The wet tissue is prepared by adopting a conventional spraying process and a low-temperature condition and can be directly applied to an existing wet tissue production line without additional equipment. The product still keeps the antibacterial effect under high-temperature and high-humidity storage conditions, and is suitable for commercial circulation and long-term storage.

The invention discloses an algin composite membrane which is prepared by the following steps: adding 0.8-1.2 g of algin, 0.8-1.2 g of hydroxypropyl methyl cellulose, 0.8-1.2 mL of glycerol, 0.4-0.6 g of titanium dioxide and 0.8-1.2 g of polylysine into water, uniformly mixing, fixing the volume, putting into a container, drying, immersing into a CaCl2 solution for crosslinking treatment, and drying, thereby obtaining the algin composite membrane. The algin composite film can be used as or used for preparing a food preservative film. The algin composite film disclosed by the invention realizes good balance between strength and ductility, has good antioxidant capacity and remarkable antibacterial effect, and can effectively enhance the antioxidant defense capacity of the cape gooseberries, reduce oxidative damage, prolong the storage period and improve the fresh-keeping effect of the cape gooseberries. According to the method, the economic value of the sargassum is favorably improved, and powerful support is provided for sustainable development of the food industry.

The invention discloses application of a firming and stability-maintaining periocular conditioning composition in skin care products, and the firming and stability-maintaining periocular conditioning composition is used for improving fragrance and promoting absorption. The composition prepared by compounding the specific components including the barrier repairing agent, the emollient, the hydroxyl compound, the surfactant, the thickener and the chelating agent in proportion has good heat resistance and cold resistance, is good in stability, can be stored for a long time, can promote regeneration of eye skin cells, keeps and regulates skin moisture, recovers skin elasticity, and has a good application prospect. The eye cream has the effects of whitening skin, delaying body aging, resisting oxidation, whitening skin, resisting inflammation and bacteria, inhibiting formation and precipitation of melanin in skin, effectively removing dark circles, minimizing pores and tightening eye skin. Besides, when the composition is used for an eye skin care product, the composition is good in fragrance, fast in absorption and smooth in smearing, the mud rubbing phenomenon is avoided, the situation that fine lines of eyes are further deepened due to the fact that the force is difficult to control in the smearing process is avoided, and the multiple requirements for wrinkle resistance, dark circle removal and the like of different skin types can be met.

The invention provides a long-acting antibacterial self-cleaning hardening PET film and a preparation method thereof. The method comprises the following steps: S1, preparing a copper deposition nano zinc oxide antibacterial material, S2, preparing an antibacterial-hardening composite material which is modified silicon dioxide or porous aluminum oxide, and S3, preparing a hydrophobic and oleophobic self-cleaning antibacterial-hardening composite material. According to the antibacterial material, through the synergistic effect of the antibacterial property of nano-zinc oxide and the antibacterial property of nano-copper elementary substance, the antibacterial effect of the PET film is remarkably improved, and the antibacterial effect is long-acting and lasting; the modified porous silicon dioxide or porous aluminum oxide is a high-hardness compound, the hardness and the wear resistance of the PET film can be obviously improved, and the antibacterial material is loaded in holes of the hardening material, so that the antibacterial-hardening composite material has the antibacterial property and does not affect the hardness of the hardening material at the same time; due to the preparation of the hydrophobic and oleophobic self-cleaning material, the composite material has self-cleaning, long-acting antibacterial and hardening effects, and can meet the application requirements of a highly-functionalized PET film.

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

The invention discloses a 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 provides a composite Janus particle. The composite Janus particle disclosed by the invention can be used for treating the dentin hypersensitivity, not only can be accurately oriented on the surface of the dentin, but also has the effects of inducing mineralization and inhibiting bacteria on the two sides respectively, and has great application potential for treating the dentin hypersensitivity and preventing decayed teeth.