43results about How to "Has antimicrobial properties" patented technology

The invention discloses a dopamine gel based micro-needle array and preparation and application thereof. The micro-needle array comprises needle tips and a base, wherein the base is mixed gel preparedfrom base raw materials including dopamine and gelatin. The micro-needle array is prepared stepwise by filling a micro-needle template with the needle tip raw material solution, and solidifying the needle tip raw material solution, and filling the micro-needle template with an adhesive base. The prepared micro-needle array is strong in adhesion and can be firmly attached to different tissue parts; and the needle tips and the base of the micro-needle array can carry various medicines or antibacterial substances for bacteria and infection resistance, transdermal drug delivery and disease treatment. The micro-needle array provided by the invention also has the characteristics of being safe, universal and multifunctional, and is applicable to the technical fields of wearable diagnosis and treatment systems and the like.

The invention discloses a gerbera jamesonii seedling transplanting and hardening substrate. The substrate is prepared from perlite, vermiculite, sawdust, pine bark, a pericarpium citri reticulatae alcohol extract, a folium artemisiae argyi alcohol extract, sphagna, flower mud, peat soil and calcium magnesium potassium phosphate fertilizer. The gerbera jamesonii seedling transplanting and hardening substrate can be applied to gerbera jamesonii tissue culture and rapid propagation and gerbera jamesonii germplasm in-vitro preservation. The gerbera jamesonii seedling transplanting and hardening substrate significantly increases the transplant survival rate of gerbera jamesonii seedlings, has the technical effect of water and fertilizer retention and has an application prospect in the plant cultivation field.

The invention discloses a preparation method of a chitosan-coated heavy calcium carbonate anti-microbial filler for a breathable film. The preparation method mainly comprises the following steps of crushing, homogenizing, grinding, drying and modifying, and has the beneficial effects that by doping chitosan during a production process, a certain anti-microbial performance is endowed to composite powder; meanwhile, a hydrophobic property of the chitosan is beneficial for surface modification of calcium carbonate powder, so that the prepared calcium carbonate composite powder is good in surface sphericity, and uniform in particle size distribution. The preparation method provided by the invention is simple and convenient in technological operation, low in cost, and suitable for industrial large-scale production.

The invention provides an antibacterial mildew proof wood fiber chopping board and a preparation method thereof. The antibacterial mildew proof wood fiber chopping board is formed by attaching nano-silver onto the surface of a substrate, and comprises the following ingredients in percentage by mass: 1 to 10 percent of nano-silver and 90 to 99 percent of substrates, wherein the substrates comprise 85 to 95 percent of wood fiber, 1 to 5 percent of lignin and 1 to 10 percent of water-base resin through being metered in percentage by weight. The preparation method of the antibacterial mildew proof wood fiber chopping board has the advantages that the wood fiber is used as the substrate; the attached nano-silver is used as an antibacterial agent; the prepared antibacterial mildew proof wood fiber chopping board has the effects of mildew proof function, antibacterial and bacteriostasis effects, cracking difficulty and the like.

The invention belongs to the field of nursing compositions, and discloses a composition, which comprises following components in parts by weight: 0.005 to 0.5 part of sunflower oil unsaponifiable matter, 0.001 to 0.1 part of balloon vine flower/leaf/vine extract, 0.01 to 1 part of echium plantagineum seed oil, 0.001 to 5 parts of tocopherol, 0.1 to 0.3 part of chlorhexidine and chlorhexidine derivatives, 0.1 to 10 parts of paeonol, and 1 to 20 parts of camellia seed oil. The invention aims to provide a composition, which has a good effect on treating eczema, in particular, eczema of babies, the composition has the advantages of mild property, effectiveness, high cure rate, and rapid effect, and the invention also provides an eczema paste containing the composition.

The invention discloses a preparation method of nanosilver-supported antibiotic fibers, and relates to the nanosilver-supported antibiotic fibers. The method comprises the following steps: 1, crushing vegetable fibers, and sieving the crushed vegetable fibers to obtain vegetable fiber powder; 2, dissolving an oxidant in water to prepare an oxidant solution, mixing the oxidant solution with the vegetable fiber powder, carrying out a reaction in a dark place, filtering the obtained reaction product, washing the filtered reaction product, and drying the washed reaction product to obtain oxidized vegetable fibers; and 3, reacting the oxidized vegetable fibers with a micro-emulsion prepared from a silver-ammonia, filtering the obtained product, and drying the filtered product to obtain the nanosilver-supported antibiotic fibers. The oxidant reacts with the vegetable fibers to generate reducing aldehyde groups, and a silver mirror reaction is controlled through the reverse micro-emulsion to make silver be uniformly supported on the surfaces of the vegetable fibers. The antibiotic fibers obtained through the above micro-emulsion method have about 99.9% antibiosis characteristic, and also has good water washing stability, and the antibiosis property almost has no obvious change after being washed with water multiple times.

The invention relates to a gauze bandage material used in surgery and wound dressing, and belongs to the application field of preparation and processing of medical devices. The preparation method comprises the following steps that an ordinary bandage as a main structural material is used as a main component of a mechanical support, after being subjected to surface activation, a nanometer zinc oxide (ZnO) material as inorganic filler is mixed with hydroxyl silicone oil, low-hydro silicone oil, an emulsifier I, an emulsifier II, a thickening agent, deionized water and a catalyst to form a zinc oxide organic silicone emulsion, and the activated gauze material is coated with the zinc oxide organic silicone emulsion by using an impregnation method or a machine coating method to obtain the medical anti-bacterial and anti-adhesion type gauze bandage. The preparation method has the advantages that the operation is convenient, postoperative healing is accelerated, the stability is high, the bandage is firm and not likely to fall off, protein adhesion is not generated, and the bandage has an anti-bacterial property.

The invention provides an edible rapeseed protein composite film, belongs to the technical field of food package, and particularly relates to an edible rapeseed protein composite film. The edible rapeseed protein composite film is prepared by a method with the following steps of hydrolyzing rapeseed protein extracted from rapeseed meal by alkaline protease, with hydrolysis degree of 10 to 20%; adjusting the pH (potential of hydrogen) value of hydrolysis liquid to acidity, obtaining supernatant, and freeze-drying, so as to obtain rapeseed protein hydrolysate; preparing a filming solution containing the rapeseed protein hydrolysate, chitosan and glycerin, and adopting a calendering method, so as to prepare the edible rapeseed protein composite film. An inventor accidentally finds that afterthe rapeseed protein is hydrolyzed and mixed with the chitosan to form the composite film, the certain antibacterial characteristic is realized, and the higher tensile strength, higher elongation rateat break and lower water vapor permeation coefficient are realized, namely better mechanical property and water blocking property; because the rapeseed protein is supplied from the rapeseed meal after oil pressing, the cost is lower, the safety of consumers is ensured, and the environment-friendly effect is realized.

The invention discloses a preparation process of child safety crystal mud with an antibacterial function, which comprises the following steps: adding deionized water, a plant humectant, a food-grade thickener and table vinegar into a reaction kettle, stirring the components until the components are completely mixed, and heating the mixture; cooling the mixture to a certain temperature, and addinga natural preservative to obtain a solution; performing heat preservation, then adding edible gum, edible glycerol, starch, edible color paste, garlic powder, onion powder, honey and traditional Chinese medicine mixed powder, and stirring the mixture for 3-4 hours; standing the crystal mud for defoaming, placing the crystal mud into a refrigerated container at 0 DEG C for 3 hours, and moving out and fill-packaging the crystal mud. The crystal mud prepared by the process has a good antibacterial function and can well prevent pathogenic bacteria infection of children during playing, so that theplaying safety of the crystal mud is improved.

The invention discloses a natural antibacterial moisturizing mask preparation method. The method includes: (1) completely dissolving a certain quantity of polyglutamic acid and polylysine into 5v/v% trifluoroacetic acid solution, and well stirring to obtain spinning solution; (2) performing electrostatic spinning by the spinning solution to obtain a PGA/PL nanofiber membrane; (3) subjecting the PGA/PL nanofiber membrane to treatment and activation through a plasma processor; (4) soaking activated nanofibers in octacosanol lipase solution to realize negative-pressure flash explosion, then performing esterification grafting reaction, and carrying out centrifugal freeze drying. A mask prepared according to the method is environmentally friendly and degradable, has efficient moisture absorbing, moisturizing and activating effects on the skin and can be applied to high-class cosmetics and masks.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a polymer film with a hierarchical porous structure and a preparation method and application thereof, and the polymer film can be used as a surface heat management film of a solar evaporator. The invention provides a polymer membrane, the polymer membrane has a micron pore structure and a nano pore structure, micron pores are distributed all over the whole polymer membrane, and the pore wall of each micron pore contains nano pores. The obtained polymer film has a hierarchical porous structure, can be used as a polymer-based heat management film, and can perform energy limitation on the surface of a solar evaporator and reduce the loss of heat in the form of heat radiation and heat convection when being used for the solar evaporator.

The invention discloses an auxiliary capable of improving printing performance of a composite ivory board and a preparation method thereof. The auxiliary is prepared from, by weight, 10-20 parts of inorganic zinc salt, 10-20 parts of inorganic additive, 0.5-1 part of surfactant, 0.5-1 part of dispersant and 60-80 parts of deionized water. ZnO nano acanthosphere particles after surface modification are adopted as the auxiliary in the process of printing the composite ivory board; the ZnO nano acanthosphere particles have siphon microstructure, and an active agent is adopted for chemical surface modification, so that ink absorptivity of the composite ivory board can be further improved.

The invention discloses lipopeptide based on melittin and a preparation method and application thereof, and belongs to the field of biological medicine. The lipopeptide is obtained by coupling C10-18 fatty acid at the N end of melittin and performing amidation modification on the C end of melittin. Experiments show that compared with parent melittin, the lipopeptide has a better inhibition effect on gram-positive bacteria and gram-negative bacteria, and has lower hemolytic activity. In an in-vitro stability test, the lipopeptide shows better stability in pepsin, trypsin and serum, is the lipopeptide with great application value, can be used for preparing a novel anti-bacterial infection medicine and the like, and has a very wide application prospect.

The invention discloses an antibacterial low-resistance high-efficiency melt-blown non-woven fabric, which is prepared by the following steps: high polymer materials are sliced, particles of antibacterial agent are embedded onto the surface of polypropylene ultra-fine fibers in a powder spraying way in a melt spinning process, and an electret process treatment is carried out. The fabric has the characteristics that the process is simple, the operation is convenient, the antibacterial effect after treatment is obvious, and the like.

The invention belongs to the technical field of coatings, and provides a modified inorganic particle, a preparation method of the modified inorganic particle and application of the modified inorganic particle in a super-hydrophobic material.The modified inorganic particle is prepared by conducting hydrophobic modification on inorganic nano-particles containing hydroxyl through rosin or rosin derivatives with the antibacterial function. The super-hydrophobic coating with the antibacterial function can be prepared by further combining the super-hydrophobic coating with low-surface-energy resin, coating the surfaces of different substrates with the super-hydrophobic coating and curing, use of organic fluorine compounds, metal ions or organic matter quaternary ammonium salt is avoided in the preparation process, the coating is environmentally friendly, biodegradable and good in biocompatibility, and the super-hydrophobic coating has the antibacterial function. The contact angle of water is not less than 152.3 degrees, the antibacterial efficiency is not less than 94.6%, and the antibacterial property on escherichia coli and staphylococcus is achieved.