80results about How to "Long antibacterial effect" patented technology

The invention relates to a method of improving the bacterinertness of a silk fibroin solution. Silk fibroin material has favorable prospects when applied in biomedicine aspect, and thus the search of a method of improving the bacterinertness of silk material is meaningful. The invention comprises a silk fibroin solution preparing working procedure which adopts silk fibroin to prepare the silk fibroin solution and is characterized by also comprising a nanometer noble metal feeding working procedure by selecting nanometer noble metal with the grain diameter between 5 nanometers to 100 nanometers. When a temperature is between 0 DEG C to 50 DEG C, the nanometer noble metal is fed to a stand-by silk fibroin solution and is stirred at a rotating speed of 100-400 round / min to obtain the silk fibroin solution comprising the nanometer noble metal; the concentration of the silk fibroin is 0.5-15w / v percent, and the concentration of the nanometer noble metal is 0.005-0.2w / v percent. The invention can favorably improve the antibiotic performance of the silk fibroin solution so that the silk fibroin can be more widely applied to biological material.

The invention discloses a preparation method of an antimicrobial and anti-degradable small instestinal mucous accellular substrate. The preparation method comprises the following steps of 1) carrying out crosslinking on soaking genipin and small instestinal mucous accellular substrate, and then rinsing and drying; 2) transferring the small instestinal mucous accellular substrate which is crosslinked with genipin in the step 1) into a dopamine solution to be soaked, and then rinsing and drying; and 3) transferring the small instestinal mucous accellular substrate processed in the step 2) into a silver nitrate solution to be soaked, and then rinsing and drying. The invention also discloses application of the antimicrobial and anti-degradable small instestinal mucous accellular substrate in tissue repair of a high stress part. According to the preparation method, the small instestinal mucous accellular substrate is modified in antimicrobial and anti-degradable performances; the small instestinal mucous accellular substrate prepared by using the method has the antimicrobial and anti-degradable performances superior to those of a natural small instestinal mucous accellular substrate and also remains high biocompatibility, and thus the small instestinal mucous accellular substrate can be applied to the issue repair of the high-stress part.

The invention discloses melt-blown polypropylene with an ultra-long antibacterial effect and a preparation method and application thereof. The melt-blown polypropylene contains a polypropylene matrixand an antibacterial agent composition, wherein the antibacterial agent composition is selected from an organic antibacterial agent and an organic matter-modified inorganic antibacterial agent; the inorganic antibacterial agent is selected from a photocatalytic antibacterial agent and a far infrared radiation-type antibacterial agent. A melt-blown polypropylene non-woven fabric is prepared from the melt-blown polypropylene through melt blowing; and the melt-blown polypropylene can be applied to the fields of medical supplies, textiles, medical disinfection bandages, medical sheets, baby diapers and the like. According to the preparation method, a new device does not need to be added or an existing device does not need to be reformed, so that the process is simple and convenient; the long-acting antibacterial melt-blown polypropylene has a good inhibition effect on escherichia coli, staphylococcus aureus and the like; the antibacterial rate can reach 99% or above during 18 hours; and the antibacterial rate can reach 99% during 360 hours.

The invention discloses a processing technology of a high-performance antibacterial polypropylene spun-bonded non-woven fabric, and relates to the technical field of non-woven fabric processing. The technology comprises the following steps of (1) carboxylated polypropylene preparation, (2) antibacterial modification of polypropylene, (3) fiber web processing and (4) non-woven fabric molding. The prepared polypropylene spun-bonded non-woven fabric has a remarkable antibacterial property, the antibacterial property is stable, and the antibacterial aging is long; the prepared polypropylene spun-bonded non-woven fabric has high mechanical strength, good air permeability, is non-toxic and harmless to the human body, and is suitable for processing medical and health products such as surgical clothes and caps, bed sheets, urinal pads, insulating clothing, visiting clothes and the like.

The invention discloses a skin wound dressing with the antimicrobial property and a preparation method of the skin wound dressing, belonging to the technical field of biomedical engineering. The skin wound dressing provided by the invention is of the spongy porous membrane structure, specifically, a sodium alginate fibrous membrane is prepared by taking sodium alginate as a base material through a freeze drying method, then biological antimicrobial peptide Cys-KR12 is fixed to the fibrous membrane through a surface finishing method, and thus the skin wound dressing is prepared. The skin wound dressing prepared by adopting the method provided by the invention is simple in preparation method and easily available in raw materials, the defects that the drug tolerance is generated, the functions are single, and the like after the existing antimicrobial dressing is used for a long term are overcome, and the skin wound dressing provided by the invention has low immunogenicity, good biocompatibility, good antimicrobial property and good induction repairing function, can promote the healing of the wound surface and the growth of epithelial cells, and is beneficial for the re-epithelialization of the wound surface.

The invention relates to a simple pyridinedicarboxylic acid rare earth complex as well as a preparation method and application thereof. The simple pyridinedicarboxylic acid rare earth complex is characterized by having the following chemical general formula: MxREy(pydcH)a(pydc)b.n H2O and being used as a rare earth antibacterial agent. The invention has moderate process conditions, simple needed equipment and convenient operation; in addition, the obtained simple pyridinedicarboxylic acid rare earth complex has high antibiosis efficiency, broad antibiosis spectrum, long antibiosis aging, and the like, has better antibiosis effect on colibacillus, staphylococcus aureus, and the like and can be widely used for various antibacterial materials.

The invention discloses a processing method of an easy-to-degrade non-woven fabric with an antibacterial function, and relates to the technical field of non-woven fabric processing. The method includes the following operation steps of firstly, synthesizing carboxyl-terminated polylactic acid; secondly, conducting antibacterial modification on the carboxyl-terminated polylactic acid; thirdly, preparing materials; fourthly, processing a fiber net; fifthly, forming the non-woven fabric. The prepared non-woven fabric has remarkable antibacterial performance and meanwhile is stable in antibacterialperformance and long in antibacterial time; the prepared non-woven fabric is high in mechanical strength, high in breathability, free of toxin and harm to human bodies and particularly good in biodegradability, and therefore the pollution caused to the environment when the non-woven fabric is abandoned is reduced.

The invention relates to a long-acting renewable antibacterial coating on the surface of a titanium implant, and belongs to the field of oral biomedical materials. The invention provides a method forpreparing the renewable antibacterial coating on the surface of the titanium implant. The method comprises the following steps that a titanium sheet is taken and polished with SiC abrasive paper, andthe titanium sheet is cleaned with a solvent and aired; then alkali heat treatment is carried out, and the titanium sheet is treated with a silane coupling agent KH570; and then the titanium sheet acts with ethylene diamine after carrying out free radical polymerization reaction with acrylic acid monomer, then the titanium sheet is soaked in a sodium hypochlorite solution, and the renewable antibacterial coating on the surface of the titanium implant is prepared. According to the long-acting renewable antibacterial coating on the surface of the titanium implant, a firm and stable macromolecular antibacterial layer is constructed on the surface of the titanium sheet by adopting a covalent bonding method and a polymer grafting method, so that the effect of lasting antibacterial is achieved;and according to the long-acting renewable antibacterial coating on the surface of the titanium implant, halamine polymer is applied to the surface modification of the titanium implant for the first time, the antibacterial coating capable of being recycled is constructed, the antibacterial layer is firm and stable, the antibacterial time is long, and the antibacterial layer can be recycled.

A nonwoven member that includes a plurality of piezoelectric fibers. The nonwoven member is formed into a cloth by intertwining the plurality of piezoelectric fibers. The nonwoven member inhibits the growth of bacteria due to an electric charge generated when an external force is applied to the piezoelectric fibers.

An antibacterial plastic bottle used as the package of food, medicine, cosmetics and detergent is prepared from high-density polyethene, low-density polyethene and antibacterial agent composed soluble phosphate glass as carrier and Ag ions as active component through preparing the raw material containing antibacterial agent for external layer, preparing the raw material (PE) for internal, respective heating, co-extruding out via dual-layer die while blowing to obtain dual-layer bottle blank, cooling and trimming.

The invention discloses a method for a jet-plating antimicrobial coating on a nano mirror surface, relating to a surface spraying technology and providing a method for a jet-plating antimicrobial coating on the nano mirror surface with long-term antimicrobial and bacteriostatic effect. The method comprises the following steps of: treating the surface of a substrate; spraying a primer coating; carrying out surface sensitization and activation treatment; spraying a nano mirror surface coating; and spraying an ultraviolet curing antimicrobial finish paint coating. The method comprises the following steps of: simple process flow, simpleness, convenience and safety for operation, usage automation, batch production and environment-friendliness; in addition, the jet-plating antimicrobial coating of the nano mirror surface has the advantages of high antimicrobial efficiency and long antimicrobial aging. An antimicrobial plastic sample is detected according to a JIS (Japanese Industrial Standard) Z2801:2000 standard, and the antimicrobial efficiency reaches 99.99 percent.

The invention relates to the technical field of shrink films, and concretely relates to an antibacterial PE shrink film. The antibacterial PE shrink film is prepared through processing, by weight, 400to 600 parts of LDPE, 150 to 300 parts of HDPE, 150 to 300 parts of mLLDPE, 80 to 150 parts of PE wax and 10 to 100 parts of a composite antibacterial agent, wherein the composite antibacterial agentis prepared through processing, by weight, 0.003 to 0.01 part of 1-bromo-3-chloro-5,5-dimethyl hydantoin, 10 to 100 parts of an inorganic antibacterial agent, 30 to 50 parts of a silane coupling agent and 40 to 60 parts of a cationic surfactant; and the inorganic antibacterial agent is a graphene oxide loaded silver ion antibacterial agent or one or more selected from nanometer silver nitrate, nanometer titanium dioxide and nanometer zinc oxide. The long-acting lasting antibacterial performance is realized, and the antibacterial effect is excellent. The invention further relates to a processing method of the antibacterial PE shrink film. The antibacterial PE shrink film with excellent antibacterial performance is obtained through processing.

The invention discloses a preparation method of antibacterial glass. The preparation method comprises the following steps: cutting a glass raw material, then carving and processing the glass raw material, and cleaning and pretreating the glass raw material to obtain pre-treated glass; and mixing, heating and melting potassium nitrate and silver nitrate to obtain antibacterial tempering furnace water, and adding the pre-treated glass into the antibacterial tempering furnace water for antibacterial tempering to obtain the antibacterial glass. The preparation method of antibacterial glass is simple in process, and the obtained antibacterial glass has the characteristics of the glass material and is good in antibacterial effect and wide in application.

The invention discloses a preparation method of a medical antibacterial bandage. The preparation method comprises spinning, weaving of a blank towel, preparation of an antibacterial liquid, preparation of an antibacterial soaking liquid, modification treatment, softening and drying. The modification treatment process comprises dipping a blank towel obtained by the step b into a washing machine, carrying out cleaning through water at 95-100 DEG C according to a bath ratio of 1: 20-27 for 25-36min, cooling the blank towel to 5-10 DEG C, washing the blank towel through water for 4-8min, adding anantibacterial soaking solution into the water, adjusting the temperature of the water solution to 65-75 DEG C, and carrying out soaking through the washing machine for 40-50min. The drying process comprises taking out a bandage and carrying out freeze drying to obtain gel on the surface of the bandage. The invention provides the preparation method of the medical antibacterial bandage. The medicalantibacterial bandage has the traditional sterilization and antibacterial functions and a cleaning function, has effects of improving blood circulation, promoting metabolism, eliminating fatigue andrefreshing brain, feels smooth, supple and comfortable, absorbs moisture and is breathable and comfortable.

The invention provides a composite antimicrobial of a nanometer silver bromide polymer and a preparation method thereof and belongs to a functional polymer material technology field. First, a quaternary ammonium salt type macromolecule polymer is prepared by free radical polymerization. Organic / inorganic composite materials required by preparation of silver bromide nanoparticles are intermingled with the macromolecule polymer of quaternary ammonium salt by in situ precipitation. The composite antimicrobial in the invention has the advantages of a quaternary ammonium salt type organic antimicrobial and an Ag-type inorganic antimicrobial combined: low toxicity, wide antimicrobial spectrum and strong antimicrobial activity. Furthermore, the prepared silver bromide nanoparticles are not easy to to agglomerate and leak and antimicrobial time is long because of a stabilization effect of the macromolecule copolymers and complex anions. The method reduces the amount of Ag and overcomes the defects that a single Ag-type antimicrobial is easy to change colors by intermingling a little Ag with organic polymer materials besides. The composite antimicrobial can be added in an undertint base to prepare antimicrobial functional materials.

The invention discloses an antibacterial concentrated water isolating net. The concentrated water isolating net is manufactured by adding an antibacterial material into a concentrated water isolating net and has an antibacterial property. By means of the concentrated water isolating net which is manufactured by adding the antibacterial material into the concentrated water isolating net and has the antibacterial property, the self-antibacterial effect of a reverse osmosis membrane component is increased by adding the antibacterial material, and thereby, a whole reverse osmosis system has a microbial contamination resistant capability; and due to the reinforcement of the antibacterial property, the advantages of greatly reducing reverse osmosis cleaning frequency, reducing the damage of a chemical cleaning solution to the surface of the membrane component and effectively prolonging the service life of the reverse osmosis membrane are achieved.

The invention discloses an antibacterial scented non-woven tape and a preparation method thereof. The antibacterial scented non-woven tape includes a base material and an adhesive layer, the base material includes an upper layer of non-woven fabric, a lower layer of non-woven fabric and a middle layer of fabric cloth, the upper layer of The raw materials of the non-woven fabric and the lower layer non-woven fabric include: polyester fiber and viscose fiber according to the weight part, and the raw materials of the middle layer fabric cloth include: polyester, spandex, bamboo charcoal fiber according to the weight part; the middle layer fabric cloth is sprayed with additives, The raw materials of the additives according to parts by weight include: fragrance particles, aloe juice and rose flower extract. The invention has good air permeability, stretchability and bonding performance. The base material is provided with an intermediate layer of fabric cloth, which can effectively block external bacteria from invading the wound, reduce the probability of wound infection, and the tape has a long-lasting antibacterial effect, and The invention can release fragrance, add aloe vera juice and rose flower extract, can help wound recovery without leaving scars, and is convenient to use.

The invention provides graphene anti-microbial shoe pads. Each shoe pad comprises a skin-touching layer, an anti-microbial functional layer and an elastic damping layer, wherein a fabric of the anti-microbial functional layer contains graphene. The graphene anti-microbial shoe pads have the beneficial effects that the used anti-microbial substance is a graphene microchip, and due to the unique two-dimensional structure, graphene has the excellent anti-microbial property. Through the chemical bond connecting method, graphene and chemical fiber macromolecules are connected, thus graphene is uniformly dispersed in the prepared chemical fibers, the corresponding chemical fibers are woven to form cloth used for the shoe pads, the shoe pads fabricated by cutting the cloth have the excellent anti-microbial property, the anti-microbial effect is available no matter whether sweat exists or not, meanwhile, chemical bond connecting is adopted between the graphene microchip and the macromoleculesof the cloth, so that loss due to fall-off seldom occurs, and thus the fabricated shoe pads have long anti-microbial time and washing resistance.

The invention discloses a preparation method of antibacterial powders for an antibacterial coating. The preparation method comprises the following steps of: (1) weighing: weighing the prepared raw materials in parts by weight; (2) pouring a Na3PO4 gelatin solution into a reaction kettle, then, dropwise adding a silver nitrate solution, a copper nitrate solution and a zinc nitrate solution into the reaction kettle within 30min, adjusting the pH value to be between 6 and 7, then, adding triethyltin chloride and stirring to obtain a colloid; (3) deposition and filtration: depositing the obtained colloid for 2-3h, and then, filtering; (4), washing; (5) drying; and (6) calcining: calcining at the temperature of 70-90 DEG C for 2-3 hours to obtain Ag3PO4 powder, Ag3PO4-Zn3(PO4)2 powder, Ag3PO4-Cu3(PO4)2 powder and Ag3PO4-Cu3(PO4)2-Zn3(PO4)2 powder. The antibacterial powders provided by the invention can be favorably applied to the antibacterial coating, is environment friendly, free of pollution to human bodies and the environment, has high antibacterial rate of over 99.9% and is suitable for occasions such as a food factory, a pharmaceutical factory, a brewery, a hospital and the like with relatively high requirements on the environment.

The invention discloses a processing method of anti-bacterial fabric. The processing method comprises the following technological steps of: 1) weaving by using warp silks and weft silks, wherein each warp silk adopts a low-twisted composite yarn which is twisted from 15-25 parts by weight of nanometer bamboo carbon fibers and 55-65 parts by weight of polyester fibers as a raw material; the warp density is 51.3-55.4 weft silks per each centimeter; each weft silk adopts a low-twisted composite yarn which is twisted from 25-35 parts by weight of nanometer silver fibers and 65-75 parts by weight of polyester fibers as a raw material; and the weft density is 22.7-25.4 weft silks per each centimeter; 2) turning over the fabric and sewing; 3) stacking cloth in amylase; 4) refining; 5) putting the cloth in catalase for oxygen bleaching; 6) dyeing the cloth; 7) performing color fixing; 8) dehydrating and scutching; 9) baking; and 10) shaping the finished product. According to the processing method of the anti-bacterial fabric, the fabric has good anti-bacterial health-care effects, good wash fastness and long anti-bacterial timeliness.

The invention discloses an antibacterial sound insulation board, which is made from the following ingredients in parts by weight: 5-10 parts of nanometer titanium dioxide, 5-6 parts of nano silver particle, 40-80 parts of high damping silicone rubber, 40-50 parts of EPDM rubber, 15-30 parts of basalt fiber, 1-2 parts of benzoyl peroxide, 80-100 parts of EVA resin, 20-30 parts of white carbon black, 4-6 parts of hydroxyl silicone oil, 23-38 parts of foam ceramic powder, 2-4 parts of mica powder, 0.3-0.5 part of zinc oxide, 2-4 parts of stearic acid, 1.2-1.8 parts of accelerator, 2-3 parts of antioxidant, 5-9 parts of bamboo charcoal particles, 3-7 parts of zinc borate, 5-8 parts of high vinyl silicone oil and 0.2-0.4 part of silane coupling agent. The antibacterial sound insulation board prepared by the invention has the antibacterial rate over 99%, the sound absorption coefficient over 0.8, the compressive strength >= 8 MPa, the breaking strength>= 25 MPa, and excellent flame retardancy.

Methods for treating bacterial infections in the colon, and colonic disorders caused by bacterial infection, using a poorly absorbable form of Rifalazil, are described. Compositions for oral administration, and colonic delivery, of a non- micro-granulated Rifalazil formulation, are also described. Rifalazil is delivered in a form which is poorly absorbed in the gut after oral dosing, and the vast majority of the orally-dosed Rifalazil is not absorbed in the gut. Accordingly, the antibacterial potency in the colonic flora will be enhanced, while absorption and systemic circulation will be reduced, thus reducing potential adverse events.

The invention discloses a processing method of anti-bacterial fabric. The processing method comprises the following technological steps of: 1) weaving by using warp silks and weft silks, wherein each warp silk adopts a low-twisted composite yarn which is twisted from 20-30 parts by weight of nanometer bamboo carbon fibers and 60-75 parts by weight of polyester fibers as a raw material; the warp density is 52.2-56.1 weft silks per each centimeter; each weft silk adopts a low-twisted composite yarn which is twisted from 35-45 parts by weight of nanometer silver fibers and 75-85 parts by weight of polyester fibers as a raw material; and the weft density is 21.4-23.7 weft silks per each centimeter; 2) turning over the fabric and sewing; 3) stacking cloth in amylase; 4) refining; 5) putting the cloth in catalase for oxygen bleaching; 6) dyeing the cloth; 7) performing color fixing; 8) dehydrating and scutching; 9) baking; and 10) shaping the finished product. According to the processing method of the anti-bacterial fabric, the fabric has good anti-bacterial health-care effects, good wash fastness and long anti-bacterial timeliness.

The invention relates to the field of plastic container preparation, and discloses a polypropylene bottle for cosmetics and a preparation method thereof, which is prepared from the following raw materials in parts by weight: 80-120 parts of polypropylene, 10-30 parts of propylene glycol, and 2 parts of carboxymethyl cellulose -4 parts, 6-8 parts of antibacterial agent, 2-4 parts of plasticizer, 2-4 parts of toughening agent, 2-4 parts of antioxidant, 4-6 parts of lubricant, 2-4 parts of light blocking agent. Preparation method: 1), weigh each raw material separately and add the raw materials into the reaction kettle for mixing, stirring, heating and melting; 2), extrude the melted raw materials through an extruder; 3), extrude the extruded The raw material is injected into the embryo by the injection molding machine; 4), the embryo is blown, stretched, cooled, internally cooled, discarded and pressure-holding, and then bottled; 5) The finished product is obtained after debottle removal. On the basis of good strength, the polypropylene bottle for cosmetics of the present invention has antibacterial function and long antibacterial effect.

The invention discloses natural antibacterial gauze and a preparation method and application thereof. The method comprises the following steps of (1) adding chitosan to water, performing uniform stirring and dispersing, then performing grinding, and adding water for diluting to obtain chitosan nanofiber suspension; (2) enabling cellulose nanometer crystal whiskers to disperse in water to obtain cellulose nanometer crystal whisker suspension; (3) soaking the gauze in the chitosan nanofiber suspension, performing taking out, and performing drying to obtain the gauze containing chitosan nanofibers; (4) immersing the gauze containing chitosan nanofibers in the cellulose nanometer crystal whisker suspension, performing taking out, and performing drying to obtain the gauze containing chitosan and cellulose nanometer crystal whiskers; and (5) ending the step (4), or repeating the steps (1) to (4) to obtain the natural antibacterial gauze. The obtained gauze can realize slow release of an antibacterial agent so as to prolong the antibacterial effectiveness, wound healing is facilitated, and the natural antibacterial gauze has anti blocking function and can be applied to the antibacterial field for medical care.

The invention discloses an antibacterial outer shell used for an automotive electronic igniter. The outer shell comprises the following raw materials in parts by weight: 125-135 parts of a main material, 1-2 parts of isopropyl tri(dioctylpyrophosphate) titanate, 0.5-1.2 parts of maleic anhydride, 1-5 parts of a composite antibacterial agent, 5-10 parts of precipitated barium sulfate, 2-6 parts ofheavy calcium carbonate, 1-6 parts of calcined kaolin, 2-4 parts of graphene, 1-2 parts of trimethylethoxysilane, 2-4 parts of a dispersant, 1-2 parts of an anti-aging agent, and 1-2 parts of a defoaming agent, wherein the composite antibacterial agent is prepared by the following processes: performing uniform mixing on houttuynin and toluene, adding a hydrogen peroxide aqueous solution dropwise,raising the temperature, performing stirring, performing extraction by adopting dichloromethane, collecting an organic phase, performing evaporation to dryness, adding nano zinc oxide, nano silver oxide, sepiolite powder and water, performing mixing, raising the temperature, performing stirring, raising the temperature, continuing stirring, performing cooling, performing filtering, performing washing, and performing drying to obtain the composite antibacterial agent.

The invention discloses herba dendrobii officinale healthcare soap. The herba dendrobii officinale healthcare soap is prepared from the following raw materials: blend oil, alcohol, glycerinum, EDTA, white sugar, water, herba dendrobii officinale, flos lonicerae, radix scutellariae, cortex cinnamomi, cortex moutan, folium artemisiae argyi, clove, radix angelicae, borneol, fructus gleditsiae, licorice root, antibacterial additive, polylactic acid, zeolite, zinc oxide, and silane coupling agent KH-560. The invention also provides a preparation method of the herba dendrobii officinale healthcare soap. The prepared soap is excellent in antibacterial performance.

The invention discloses a pollution-free agricultural soil disinfectant, and discloses a preparation method of the disinfectant. The preparation method comprises the following steps: dissolving carbendazim in water, adding cyclodextrin, bamboo powder, medical stone powder and borax, mixing, and stirring to obtain a premixed antibacterial agent; crushing crop straws, and carrying out flash explosion treatment to obtain plant powder; adding polyaspartic acid, sodium alginate and corn protein peptide into the plant powder, mixing and grinding to obtain pretreated plant powder; and adding the pretreated plant powder into the premixed antibacterial agent, adding hypochlorous acid and water, and uniformly stirring to obtain the p preparation method. By adopting the method to disinfect the soil,the control effect on plant diseases and insect pests is greatly improved, the soil properties are obviously improved, the capacity of crop roots for absorbing nutritional ingredients can be obviouslypromoted, and the utilization rate and the yield of the fertilizer are obviously improved.

The invention discloses a long-acting bio-antibacterial polylactic acid plastic and a preparation method thereof and relates to the fields of preparation of antibacterial plastic. The invention is tosolve the problem that when chitosan, as an additive, is applied to biodegradable polylactic acid plastic in the prior art, the antibacterial activity is inferior to that of artificial organic / inorganic antibacterial agents. The method includes: 1) preparing antibacterial fibers from chitosan; 2) performing a crosslinking reaction with the chitosan antibacterial fibers with glyoxal being a crosslinker; 3) directly performing mixing coextrusion on the chitosan antibacterial fiber powder and a polylactic acid material to obtain an antibacterial polylactic acid base material; 4) performing high-temperature low-speed blending on the modified chitosan antibacterial fiber material and the antibacterial polylactic acid base material to prepare the long-acting bio-antibacterial polylactic acid plastic.

The invention provides a ureter stent tube capable of degrading long-acting antibacterial and a preparation method thereof. The ureter stent tube body is a membrane structure and an antibacterial agent whose loading amount is 0.01-5wt% is uniformly distributed inside and on the surface of the stent tube body. The preparation method comprises the following steps of: preparing the degradable fiber into a tubular fabric with uniform wall thickness and regular texture, soaking the tubular fabric in an antibacterial agent dispersion liquid, under the wicking action and the capillary action of a fiber aggregate, filling pores in the fabric with the antibacterial agent dispersion liquid, taking out, drying and repeating for a plurality of times, and then fixing the tubular fabric on a core mold,hot-melting the fabric to form a film by means of heat treatment, and pulling out the core rod after cooling to obtain the degradable ureter stent tube loaded with the antibacterial agent. The invention has the advantages of simple preparation, controllable loading amount of the antibacterial agent, uniform distribution, effective embedding of the antibacterial agent and the bracket body, no burstrelease phenomenon after being implanted into the body, long-acting antibacterial effect and better biocompatibility.