15results about How to "Long antibacterial time" patented technology

The invention discloses a method for post-root canal therapy resin closure retreatment in a medullary cavity, and relates to the technical field of root canal therapy, and the method comprises the following steps: S1, pre-operation sampling; s2, removing the restoration and other materials: removing the restoration on the surface of the dental crown and the resin sealing material in the medullary cavity by using a material removal technology and a tool, wherein the material removal technology and the tool comprise a grinding device with a sensor or a laser technology; s3, re-cleaning and disinfecting the root canal: after cleaning the root canal, using a root canal disinfection drug added with nano-silver particles, and mixing the nano-silver particles with traditional disinfection drugs such as calcium hydroxide paste; s4, filling and re-treating: blending the color of the resin by using a computer color matching technology before filling the medullary cavity; the system further comprises an intelligent design monitoring platform. According to the invention, a grinding device with a sensor or a laser technology is adopted, so that the damage to tooth tissues, especially key parts, is remarkably reduced, and the treatment safety and accuracy are improved.

The invention relates to the technical field of antibacterial fabrics, in particular to a nano-antibacterial layered fabric, a preparation method thereof and nano-antibacterial western-style clothes. The nano antibacterial layered fabric comprises a middle layer, a bottom layer adhered to one side of the middle layer, and a surface layer adhered to the other side of the middle layer, wherein the bottom layer is made of nano-antibacterial cloth, the middle layer is made of a polytetrafluoroethylene garment film, and the surface layer is made of knitted fabric or woven fabric. Wherein the nano antibacterial fabric is prepared by the following steps: adding dopamine and amino-terminated polyamidoamine into a Tris-HCl solution with the pH value of 8-9, adding an activated fabric into the solution, carrying out ultrasonic treatment at 40-50 DEG C for 1-2 hours, taking out, washing and carrying out vacuum drying. According to the fabric, a multi-layer structure is adopted, the bottom layer is made of the nano-antibacterial cloth, the nano-antibacterial particles are added into the nano-antibacterial cloth, growth of bacteria and generation of peculiar smell are effectively inhibited, and the waterproof performance and the air permeability of the fabric are effectively improved in cooperation with the PTEF thin film of the middle layer.

The invention discloses an antibacterial and mildew-proof sanitary container bag and a preparation process thereof, and relates to the technical field of container bags, the antibacterial and mildew-proof sanitary container bag comprises a plastic woven cloth layer, a bonding layer and a base layer from outside to inside in sequence; the base layer is composed of a base material and antibacterial and mildew-proof resin particles, and the base material is composed of a bottom layer, a middle layer and a surface layer in sequence; the antibacterial mildew-proof resin particles are positioned on the bottom layer and the middle layer or the middle layer and the surface layer of the base layer; the addition amount of the antibacterial and mildew-proof resin particles in the base layer accounts for 3.0-5.0% of the total addition amount of the base layer in percentage by weight; the water absorption layer is introduced into the antibacterial mildew-proof resin particles, the release speed of silver ions is effectively controlled through the slow release effect of the water absorption silica gel, too fast loss of the silver ions is avoided, slow release of the silver ions is achieved, and therefore the antibacterial time of the container bag is prolonged.

The present invention relates to the technical field of polymer materials, specifically a kind of high elastic antibacterial PETG material, preparation method and medical packaging material. The preparation method comprises the following steps: using graphene oxide to load nano silver particles, obtain an antibacterial agent, then modifying the surface of the antibacterial agent with 3-aminopropyl triethoxysilane, obtain a modified antibacterial agent, reacting diisocyanate, polyester polyol, and hydroxyl-terminated polysiloxane, then adding modified antibacterial agent, amoxicillin, chain extender, catalyst, stirring reaction, obtain modified polyurethane loaded antibacterial agent, modified polyurethane loaded antibacterial agent, dibutyltin dilaurate, PETG melt blending, extrusion tableting, obtain high elastic antibacterial PETG material. The high elastic antibacterial PETG material of the present invention has high elasticity and excellent antibacterial performance, and can be used in packaging fields such as medical packaging.

The invention relates to the technical field of bacteriostatic agents, in particular to a plant extract with a bacteriostatic effect and a preparation method thereof. The preparation method comprises the following steps: S1, mixing roxburgh rose roots, burdock, fructus forsythiae fruits, liquorice, cinnamon and papaya leaves, and crushing into mixed powder; s2, preparing an extraction auxiliary agent from carboxymethyl cellulose, lactoferrin and Tween-20; s3, adding the mixed powder into water, dipping, extracting and filtering to obtain a water extract and filter residues; s4, adding the filter residues into 95% ethanol, then adding an extraction aid, and extracting at 50-60 DEG C for 1-2 hours to obtain an alcohol extract; and S5, uniformly mixing the water extract and the alcohol extract, carrying out vacuum concentration, adding modified cyclodextrin, uniformly mixing, and carrying out spray drying to obtain the plant extract with the antibacterial effect. The plant extract is prepared by combining various plant components and the modified cyclodextrin, so that the antibacterial effect of the plant extract is remarkably improved, and the antibacterial durability of the plant extract is greatly prolonged.

This invention belongs to the field of functional films, and relates to self-assembled Thy@ZIF-8 nanoparticles, a self-reinforced multifunctional preservation composite film, its preparation method, and its application. The self-assembled Thy@ZIF-8 nanoparticles are nanoparticles formed by encapsulating thymol (Thy) in the metal-organic framework material ZIF-8. This invention prepares and optimizes self-assembled Thy@ZIF-8 nanoparticles and, for the first time, uses them as a material component in the preparation of post-harvest fruit preservation films. Utilizing the porous structure and high specific surface area of ​​ZIF-8 nanoparticles, the active substance Thy is encapsulated to prepare synthetic Thy@ZIF-8 nanoparticles. Through changes in the pH of the microenvironment during post-harvest storage of fruit, the structure of the Thy@ZIF-8 nanoparticles is disrupted, releasing Thy, achieving the purpose of slow release and prolonged antibacterial effect.

The invention relates to the field of textile materials, and particularly discloses a nano silver oxide modified polyester pre-oriented yarn and a preparation method thereof. The nano silver oxide modified polyester pre-oriented yarn is prepared from the following raw materials in parts by weight: 90-110 parts of terephthalic acid, 40-60 parts of ethylene glycol, 0.5-0.8 part of nano silicon dioxide, 1-3 parts of a delustering agent and 1-3 parts of a dispersing agent, the matting agent comprises nano titanium dioxide, nano silver oxide is deposited on the surface of the nano titanium dioxide to form a nano silver oxide-titanium dioxide compound, and the surface of the nano silver oxide-titanium dioxide compound is subjected to wet modification through octadecylamine; according to the prepared nano silver oxide modified polyester pre-oriented yarn, wet modification is conducted through titanium dioxide, then wet modification is conducted through octadecylamine, antibacterial active ingredients can be stably and evenly dispersed in the polyester pre-oriented yarn raw materials, and the antibacterial durability of the polyester pre-oriented yarn is improved.

The present invention discloses a collagen hydrogel and a preparation method and application thereof, belonging to the technical field of wound dressings. The collagen hydrogel of the present invention is formed by chemical cross-linking of collagen, hydrophobically modified chitosan and dopamine through a cross-linking agent. Compared with the gel formed by electrostatic force, the dressing has greater tensile strength, longer elongation at break, better flexibility, and stronger adhesion to the wound surface. It has the functions of replenishing moisture to the wound skin, enhancing skin elasticity, and moisturizing the skin. It also has the effects of rapid hemostasis, pain relief, and absorption of blood stains; at the same time, it contains natural antibacterial molecules, has a long effective antibacterial time, is suitable for wound healing after surgery, abrasions, knife wounds, burns, scalds, etc., has a significant effect on the healing of oral ulcers, and is used as a wound dressing with broad application prospects.

The invention belongs to the technical field of external pharmaceutical compositions, and particularly relates to a multi-layer coated microsphere antibacterial gel and a preparation method thereof. The gel is composed of three core components: multi-layer coated microspheres, a composite antibacterial component and a carbomer matrix solution. The antibacterial component comprises thymol, oregano oil, anisaldehyde, corilagin, ellagic acid and nano-silver, and aims to realize a broad-spectrum and efficient antibacterial effect. The preparation method comprises the following steps: preparing multi-layer coated microspheres by utilizing a micro-fluidic chip technology, coating a composite antibacterial component in the multi-layer coated microspheres, then dispersing the microspheres in a carbomer solution, and further compounding to obtain the microsphere antibacterial gel. During daily storage, the microspheres in the antibacterial gel can realize long-acting maintenance of the antibacterial components; when the gel is smeared on the skin surface, the gel microspheres are broken and release the internally-packaged antibacterial components, so that the antibacterial effect is achieved.

The invention belongs to the technical field of personal care products, and particularly relates to a China-hemp antibacterial cotton sliver and a preparation method thereof. The hemp fibers and the bamboo fibers are mixed, the combination of the hemp fibers and the bamboo fibers can enhance the overall antibacterial property and hygroscopicity of the cotton sliver, the softness and comfort of the hemp fibers and the bamboo fibers are improved after biological enzyme treatment, the hemp fibers and the bamboo fibers have good compatibility with the plant extract, the activity of the plant extract is kept, and the cotton sliver is good in antibacterial property and antibacterial property. The prepared plant composite essence enables the plant essence to be slowly released, and it is ensured that the cotton sliver continuously plays a role in inhibiting bacteria and relieving in the using process. The prepared China-hemp antibacterial cotton sliver has the effects of long-acting bacteriostasis, anti-inflammation, analgesia and long-acting relieving, the risk of inflammation infection can be effectively reduced, and a durable and comfortable safety guard is brought.

The application discloses a W / O / W compound emulsion and a preparation method and application thereof. The preparation method of the compound emulsion comprises the following steps: mixing cinnamyl aldehyde and hydrophobic bacterial cellulose with oil to prepare an oil phase; mixing the oil phase with a nutritional ingredient aqueous solution to prepare a W1 / O primary emulsion by homogenously emulsifying; mixing the W1 / O primary emulsion with an aqueous solution W2 containing bacterial cellulose to homogenously emulsify, and the W / O / W compound emulsion is obtained; and the hydrophobic bacterial cellulose is obtained by hydrophobic modification of bacterial cellulose. The cinnamyl aldehyde in the oil phase is released to the outside at the same time as the nutritional ingredient in the inner aqueous phase, so that the released nutritional ingredient is prevented from being polluted by bacteria, the antibacterial time is prolonged, and the shelf life of the compound emulsion is prolonged. In addition, the bacterial cellulose is used as a water-soluble emulsifier to stabilize the O / W2 emulsion, and the hydrophobic bacterial cellulose is used as an oil-soluble emulsifier to stabilize the W1 / O emulsion, so that the compound emulsion has good biocompatibility, safety and stability.

The invention provides a formula of gloves with an odor-resistant hand effect and a preparation method thereof, and the formula of the gloves with the odor-resistant hand effect comprises the following raw materials in parts by mass; 100 to 200 parts of a pre-vulcanized latex solution, 6 to 14 parts of an anti-aging agent, 0.5 part of a zinc pyrithione suspension, 0.1 to 10 parts of a thickening agent and 0.1 to 10 parts of a latex auxiliary agent; wherein the solid content of the pre-vulcanized latex solution is 50-70%, and the zinc pyrithione has bacteriostatic, antibacterial and bactericidal effects. Zinc pyrithione is a suspension with milk white appearance, and is mainly applied to shampoo products and cosmetic products at present. The sterilizing agent is also applied to sterilization treatment of oil agents and coatings. Zinc ions in zinc pyrithione have very broad-spectrum bactericidal activity on bacteria, molds and saccharomycetes, and bacteria and fungi are prevented from decomposing sweat, grease or glove latex components on human hands from the source, so that the effect of deodorizing the hands is achieved. The invention provides a formula of gloves with an odor-resistant hand effect and a preparation method of the gloves.

The invention discloses a plant extract multi-effect composition and a preparation method and application thereof. The plant extract multi-effect composition comprises the following raw materials in percentage by mass: 20-60% of an antibacterial agent and 1-10% of a synergist. The antibacterial agent comprises a mixture of at least two of a ginkgo leaf extract, a gardenia fruit extract and a blackberry fruit extract, and the synergist comprises at least one of a pomelo peel extract and a white willow bark extract. The invention can significantly improve the antibacterial and antioxidant effects by giving full play to the synergistic effect between the extracts, and can achieve the purpose of rapid and long-term antibacterial. The plant extract multi-effect composition can be used in cosmetics and has the advantages of low dosage, safety, effectiveness, natural low stimulation and the like.

The invention belongs to the field of functional films, and relates to a self-assembled Thy-ZIF-8 nano-particle, a self-enhanced multifunctional fresh-keeping composite film and a preparation method and application of the self-assembled Thy-ZIF-8 nano-particle and the self-enhanced multifunctional fresh-keeping composite film. The self-assembled Thy (at) ZIF-8 nano-particles are nano-particles formed by encapsulating thymol Thy with a metal organic framework material ZIF-8. The invention further discloses a preparation method of the self-assembled Thy (at) ZIF-8 nano-particles. The self-assembled Thy ZIF-8 nanoparticles are prepared and optimized, and are used as a material component for preparing the fruit postharvest fresh-keeping film for the first time. An active substance Thy is encapsulated by utilizing the characteristics of a porous structure and a high specific surface area of the ZIF-8 nano-particles, and the Thy-coated ZIF-8 nano-particles are prepared and synthesized. Through the change of the microenvironment pH of the picked fruits in the storage process, the Thy ZIF-8 nano-particle structure is damaged, and Thy is released, so that the aims of slowly releasing and prolonging the antibacterial aging are fulfilled.

The invention provides antibacterial gauze as well as a preparation method and application thereof, and belongs to the technical field of gauze. The antibacterial gauze comprises two layers of gauze and fibers distributed between the two layers of gauze; the fiber comprises a fiber tube and a filler filled in the fiber tube; the fiber tube comprises a first degradable polymer; the filler comprises a second degradable polymer and an antibacterial agent. The antibacterial gauze provided by the invention comprises the fibers, the fibers comprise the fiber tubes and the filler filled in the fiber tubes, the filler contains the antibacterial medicine, and when the antibacterial gauze is used for binding up a wound, polymers in the fiber tubes and the filler are gradually degraded, so that the antibacterial medicine in the filler is gradually released, and the antibacterial effect is improved. Therefore, the antibacterial time of the gauze is prolonged. The result of the embodiment shows that the release time of the antibacterial medicine in the filler in the antibacterial gauze provided by the invention reaches 28 days, and the antibacterial gauze has a long-term antibacterial effect.