69results about How to "Good antimicrobial performance" patented technology

The invention discloses an anti-bacterium antivirus guanidine salt star-shaped polymer, a preparation method and applications thereof, and the arm number, structure and molecular weight of the star-shaped polymer are controllable. The polymer is prepared by the following steps: adopting a core-first method, taking brominated beta-cyclodextrin as an initiator, guanidine salt oligomer containing carbon-carbon double bonds as the functional monomers, and then carrying out atom transfer radical polymerization so as to obtain the target product, wherein the structure and molecular weight of the polymer can be modulated according to the application needs. The polymer and the preparation method thereof improve the molecular weight of the polymer, achieve chain amplification effect, increase the density of effective functional groups having an anti-bacterium effect, effectively solve the problems of contamination on other products caused by leakage of anti-bacterium agents and nondurable anti-bacterium effect, and eliminate the potential dangers caused by leaked anti-bacterium agents on human health. Furthermore, the polymer has a prominent function, which other guanidine salt polymers do not have, of killing wild type viruses and bacteria such as gland virus, influenza virus, and the like.

The invention discloses an antimicrobial disinfectant with good biocompatibility. The antimicrobial disinfectant includes: 0.001wt%-100wt% of an antimicrobial macromolecule; 0wt%-99.999wt% of an assistant; and 0wt%-99.999wt% of a solvent. The antimicrobial disinfectant provided by the invention has the characteristics of simple components and easy preparation; long-acting and rapid killing and inhibiting effect on gram positive pathogenic bacteria, gram negative pathogenic bacteria, moulds, fungi, viruses and other microorganisms selectively; no toxic or side effect on normal animal body cells and tissues; no irritation on the human body; auxiliary hemostasis and coagulation, and promotion of cell tissue regeneration, acceleration of wound healing, and no drug resistance; and no pollution to the environment, thus being a widely applicable, economical, environment-friendly and safe antimicrobial disinfectant.

The invention relates to a preparation method and application of a deacetylated chitosan ecological finishing agent used for finishing natural fibers and regenerated natural fiber fabrics. The invention aims to solve the technical problems of a crosslinking problem, size and uniformity of chitosan acetic acid sol particles and stability of the finishing agent. The method is technically characterized by comprising the following steps: mixing chitosan and lacial acetic acid to form an acetic acid aqueous solution with the acetic acid concentration of 1.5-3 percent, dripping a 10g/L of ion stabilizer agar solution, regulating the size of the chitosan colloid particles to be in a distribution range of 60-100nm, forming a uniform and stable acetic acid-chitosan colloid solution of which the colloid size is in a nanoscale, controlling the pH value to be 4-7, wherein the viscosity of the colloid solution is 2-60mPa.s. The method has good chitosan fixation effect, does not have harmful or chemical residues and is environment-friendly, high-efficiency, harmless to human bodies and rich in raw material source.

The invention discloses a cutting liquid composition to manufacture metal, which comprises the following parts: 0.1-10% cobalt-inhibiting additive with triazine, 0.5-40% antirust agent, 0.05-5% corrosion inhibitor, 0.2-20% pH value adjustor and tap water, basic oil or composition to manufacture cobalt knife or cobalt manufacturing material in the cutting manufacturing course.

The invention relates to the field of cutting fluid for machining, in particular to synthetic ester environment-friendly type aluminum alloy cutting emulsified oil and a preparing method thereof. The synthetic ester environment-friendly type aluminum alloy cutting emulsified oil is prepared from, by weight, 20-30 g of base oil, 10-22 g of high-temperature resistance synthetic ester, 10-30 g of high-saponification value synthetic ester, 4-8 g of a first anti-rusting agent, 2-4 g of a second anti-rusting agent, 4-12 g of an emulsifying agent with the HLB value higher than or equal to 10, 6-16 g of an emulsifying agent with the HLB value lower than or equal to 6, 1-3 g of an emulsion multifunctional assistant, 1-3 g of an aluminum alloy corrosion inhibiting agent, 2-6 g of a coupling agent and 1-3 g of a sterilizing agent.

The invention relates to an antimicrobial macromolecule with biocompatibility. The antimicrobial macromolecule with biocompatibility comprises a macromolecular framework, an antimicrobial functional group branched chain and a biocompatibility functional group branched chain. The antimicrobial functional group branched chain and the biocompatibility functional group branched chain are grafted on the macromolecular framework, and the molar ratio of the antimicrobial functional group branched chain to the biocompatibility functional group branched chain is 1,000:1 to 1:1,000. The grafting rate of the antimicrobial functional group branched chain is 0.001%-99.999%. The prepared antimicrobial macromolecule with biocompatibility has the advantages of selectively resisting microorganisms and having no toxic and side effects on animal organism cells and tissue, resists microorganisms in a broad-spectrum, efficient and longlasting manner, has inhibiting and killing effects on gram positive bacteria, gram negative bacteria, fungi, mould, viruses and the like, and is suitable for large-scale application in various relevant fields such as the disinfection antimicrobial field.

The embodiment of the invention relates to an air filter screen, a filter material attached antibacterial composition. The antibacterial composition is prepared from the following components by mass:1-15 parts of an antibacterial agent, 1-10 parts of a porous carrier, 0.1-5 parts of a stabilizer, 0.5-5 parts of a surfactant and 1-15 parts of an adhesive; wherein the antibacterial composition is added into the filter material according to an addition amount of 2-70g/m<2>. The air filter screen has the effects of resisting bacteria, mildew and viruses and reducing peculiar smell.

The invention discloses a culture medium for increasing a bacteria specific content in escherichia coli of a plasmid DNA (Deoxyribonucleic Acid) content, relating to the field of biomedical sciences. Each litre of the culture medium contains the following components: 5 g of yeast powder, 5 g of peptone or beef extract, 9 g of sodium chloride, 10 ml of glycerinum, 5 g of lactose, 1 g of citric acid, 10 g of disodium hydrogen phosphate, 0.2 g of sodium hyaluronate, 3 g of ammonium sulphate, and 12 g of calcium chloride. The content of the peptone or beef extract is reduced on the basis of the original LB (Luria-Bertani) culture medium; 9g of sodium chloride is added into 1 L; a cell isotonic culture solution is obtained; calcium chloride is used for reducing bacteria settlement, assisting to stop bacteria flocculation and mutually inhibiting growth; a slight anaerobic environment is set up by introducing a part of CO2 in the culture medium, so that the tolerance of escherichia coli is increased; by means of addition of hyaluronic acid and ammonium sulphate, the membrane permeability is adjusted; diffusion and operation of water electrolytes are kept; and a cell metabolism microenvironment is provided.

The invention discloses a sponge city rainwater purification system and rainwater purification method. At present, reinforced concrete and stainless steel reservoirs are used for collecting rainwaterin China, the two construction processes are complex, the number of procedures is large, and a lot of manpower, material resources and financial resources are wasted. The sponge city rainwater purification system comprises a rainwater purification device; inclined edges are arranged at the periphery of the upper part of the rainwater purification device, wherein the edge at one side is a road edge(8), and the edges at the other three sides are each provided with a group of overflow holes (5); sewage intercepting baskets (1) are arranged in the edges; each sewage intercepting basket comprisesa circular gauze frame; an oil absorption bag (2) and a filter screen (4) are sequentially arranged in each circular gauze frame; infiltration holes (6) are formed in the bottom of the rainwater purification device; an infiltration filtering system (9) is arranged below the infiltration holes; coarse gravels (10) are arranged on the upper layer of the infiltration filtering system; fine gravels (11) are arranged on the middle layer of the infiltration filtering system; and filtering geotechnical cloth (12) is arranged on the bottom layer of the infiltration filtering system. The rainwater purification method of the invention is used for the sponge city rainwater purification system.

The invention discloses a preparation method of an aqueous cutting fluid environment-friendly antibacterial agent, and belongs to the technical field of preparation of cutting fluid additives. The preparation method comprises the following steps: firstly drying Chinese thorowax roots and common cnidium fruits, then performing crushing and screening, and performing stirring with a sodium hydroxide solution and alkaline lipase for enzymolysis; performing filtration and freezing, and then preparing a liquid nutrient medium with sterilized water, a yeast extract and the like; then inoculating bacillus natto to perform culture fermentation; then adding anhydrous ethanol and ammonia water for reaction; performing centrifugation, then collecting supernatant, and mixing the supernatant with activated carbon for decolorization; collecting a decolorized solution, and performing rotary evaporation and vacuum concentration; and finally, collecting a condensate to obtain the aqueous cutting fluid environment-friendly antibacterial agent. The environment-friendly antibacterial agent prepared by the method disclosed by the invention is relatively good in antibacterial ability and has the advantages of strong compatibility, small odor, no corrosiveness and small skin irritation to operators; and meanwhile, the antibacterial agent is green and environment-friendly, cannot cause damages to the ecological environment, and can achieve antibacterial and bactericidal effects continuously and effectively, thereby having relatively good application prospects.

A dissolvable solid article which can include multiple layers of flexible, dissolvable, porous sheets, in which a coating composition including solid particles is present on at least one internal surface of at least one sheet in said solid articles and a process for making such solid articles.

There is provided a method for decreasing leakage of matter from an object to a surrounding, said object being coated with a coating at least partially applied on the object, said coating comprising an at least partially covering layer comprising silver, said object optionally comprising area(s) without said layer, said coating comprising metal particles applied on the layer and optionally on areas without said layer, said metal particles comprising palladium and at least one metal selected from the group consisting of gold, ruthenium, rhodium, osmium, iridium, niobium, neodymium and platinumand wherein the amount of the metal particles is in the interval 0.01-8 [mu]g/cm2. Advantages include that leakage of matter such as latex allergens of metal ions can be reduced while the coating is both biocompatible and antimicrobial. Further, the blood clotting can be reduced.

The invention discloses a preparation method of an ocean anti-corrosion building coating with the function of inhibiting microbial activities. The prepared coating can be used for inhibiting the corrosion effect of microorganisms on buildings, and is applicable to ocean environment and humid environment. Organic catalyst or solvent is not required to be added in the preparation process, the coating is an environmentally-friendly anti-corrosion building coating. Nanosilicon dioxide particle loaded Ag+ and inorganic filler modified montmorillonite loaded nano-zinc oxide in the coating are adhered to the surface of the material through curing and film formation, the microbial activities are inhibited, so that the base materials are doubly protected, and a preferable anti-corrosion effect is reached. The coating is harmless for the environment, long in service cycle, cheap in raw materials and simple in method, and has excellent market generalization.