23results about How to "Antibacterial" patented technology

The invention discloses a preparation method of a multifunctional polyvinyl composite film and application of the multifunctional polyvinyl composite film in food preservation. The preparation method comprises the following steps: firstly, preparing Ag-coated MOF through a hydrothermal method, then uniformly dispersing the Ag-coated MOF and tannic acid into a carboxymethyl chitosan solution, and carrying out crosslinking modification on the Ag-coated MOF; and coating the prepared CMCS / TA / Ag (at) MOF mixed solution on a polyethylene film treated by oxygen plasma, and drying to form a film, so as to obtain the multifunctional polyethylene-based composite film. The CMCS and the TA are adopted to perform crosslinking modification on the Ag-coated MOF, so that the stability of the Ag-coated MOF can be further improved, and the release of silver ions is reduced. Compared with a common PE preservative film, the composite film prepared on the basis has better barrier capacity and mechanical property, and has antibacterial, anti-ultraviolet and anti-oxidation effects. The multifunctional preservative film is convenient to use and low in price, and has an important application prospect in the aspect of fresh-keeping packaging of meat products.

The invention discloses a preparation method of a polyphenol-containing medical adhesive. The preparation method comprises the following steps: respectively preparing a gelatin solution, a gallic acid solution and a tea polyphenol solution; mixing the gelatin solution and the gallic acid solution, and reacting at 40-60 DEG C for 6-12 hours to obtain a modified gelatin solution; mixing the tea polyphenol solution with the modified gelatin solution, adding an alkaline solution to adjust the pH value to 6.5-8.0, and uniformly mixing to obtain a mixed solution; the mixed solution is aged at 20-40 DEG C, water generated in the aging process is removed, and the polyphenol-containing medical adhesive is obtained. According to the preparation method of the polyphenol-containing medical adhesive, a gelatin protein molecular chain is used as a framework material, gallic acid is introduced into the protein molecular chain, tea polyphenol is used as a main chain cross-linking agent, the polyphenol-containing medical adhesive is prepared, a phenolic hydroxyl group can penetrate through a water boundary layer on the surface of a base material to form an adhesive bond with the base material, and the medical adhesive has the advantages that the water boundary layer can penetrate through the water boundary layer; good wet adhesion is shown on tissues.

This invention discloses an anaerobic biodegradable masterbatch for cast film of sanitary materials, characterized in that its main components, by mass percentage, include: 0.5-3% cypermethrin, 3-6% copper sulfate, 0.1-0.5% metal inorganic salt coating agent, 1-4% ammonium molybdate, 5-10% PLA, 5-10% nano starch, 1-5% carbamide, 7-12% fumed silica, and the balance being a biodegradable resin carrier. The preparation method includes dispersion treatment, centering treatment, structuring treatment, carrier implantation, and plasticizing granulation. The invention also discloses an anaerobic biodegradable cast film for sanitary materials, comprising the following components by mass percentage: 83.4%-97.13% PE-based cast film substrate for sanitary materials, 1-5% PE wax, 1-7.5% degradation masterbatch, 0.15-0.3% dispersant, 0.02-0.2% antioxidant, 0.2-0.6% white oil, 0.5-3% PE grafted maleic anhydride, and 0.2-2% stabilizer. The manufacturing method includes: material preparation, calcium carbonate pretreatment, melting, filtration, and casting. This invention achieves complete anaerobic biodegradation of PE cast leak-proof and breathable films, and also has antibacterial properties during normal use, making it suitable as a breathable film and base film for disposable sanitary materials.

This invention provides a plant-based gel patch and its preparation method. The plant-based gel patch is prepared by mixing and freezing the following components, including modified polyvinyl alcohol, modified chitosan, functionalized borate ester, and distilled water; the preparation method is as follows: (1) modification of chitosan; (2) synthesis of functionalized borate ester; (3) preparation of allyl dihydrocaffeic acid; (4) graft modification of polyvinyl alcohol; (5) molding of the plant-based gel patch; the plant-based gel patch prepared by this invention can be used as a dressing for skin wound healing, and has antibacterial, good adhesion and self-healing ability.

The application discloses a composite solid decoloring powder and a preparation method thereof, and belongs to the technical field of water treatment agent preparation. The modified nano titanium dioxide is obtained by coating titanium dioxide with 3-methyl acrylic acid sulfopropyl potassium salt grafted polydopamine. The titanium dioxide has photocatalytic effect and antibacterial property, can catalytically decompose pollutants in sewage, inhibit the breeding of bacteria in water, and can catalytically decompose free formaldehyde in dicyandiamide formaldehyde polycondensate. The modified nano titanium dioxide is loaded on phenolic resin foam, and after calcination, the nano titanium dioxide / foam carbon powder is formed. The large specific surface area and porous property of the foam carbon can increase the capture and fixation of free formaldehyde, and can synergistically accelerate the catalytic degradation of formaldehyde with the titanium dioxide. The dicyandiamide formaldehyde polycondensate grafted with castor oil is in-situ polymerized on the surface of the matrix. The castor oil grafting can significantly improve the dicyandiamide formaldehyde polycondensate, significantly increase the molecular weight, and increase the capture capacity.

The invention relates to the technical field of raw materials of skin care products, and particularly discloses an acne-removing composition as well as a preparation method and application thereof. The acne-removing composition comprises the following components in parts by mass: 1.32-4.6 parts of a composite extract; 0.01 to 0.02 part of a skin repairing agent; 10 to 20 parts of a humectant; 75.38 to 88.67 parts of a solvent; the composite extract is prepared by compounding codium tomentosum extract, cryptomeria fortunei bud extract, nymphaea tetragona flower extract, reed extract and ganoderma sinensis extract. The acne-removing mask has the advantages that the acne-removing effect is more thorough, and acnes are not easy to relapse.

The invention relates to the technical field of TPU, in particular to recyclable TPU non-woven fabric leather and a preparation method thereof. The recyclable TPU non-woven fabric leather comprises a PU texture layer and a TPU melt-blown fabric layer which are sequentially arranged from top to bottom. The recyclable TPU non-woven fabric leather has the advantages of being antibacterial, breathable, soft, high in adhesive force and high in tensile property. The preparation method of the recyclable TPU non-woven fabric leather is simple in process, easy to control in operation and beneficial to industrial mass production, and the prepared recyclable TPU non-woven fabric leather is stable in quality and excellent in comprehensive performance.

The application belongs to the field of functional building materials, and particularly relates to an antibacterial cement mortar with Bi5O7I / BiOBr composite nano-material doped therein, a preparation method of the antibacterial cement mortar, and application of the antibacterial cement mortar in bacteriostasis, antibiosis and improvement of mechanical strength. The antibacterial cement mortar with Bi5O7I / BiOBr composite nano-material doped therein is composed of Bi5O7I / BiOBr composite nano-material, water, cement and sand; the mass of the Bi5O7I / BiOBr composite nano-material is 0.5% to 1.5% of the mass of the cement. The Bi5O7I / BiOBr composite nano-material is constructed, introduced into a cement-based material system to prepare the antibacterial cement mortar, so that the antibacterial cement mortar has antibacterial performance and mechanical strength is significantly improved.

The invention provides modified polyurethane as well as a preparation method and application thereof, and the modified polyurethane is a polymer obtained by carrying out chain extension reaction on a polyurethane prepolymer obtained by carrying out reaction on PLGA (poly (lactic-co-glycolic acid)) and polyisocyanate, a chain extender C2-6 aliphatic diamine and chitosan. According to the invention, chitosan and PLGA are introduced into the molecular structure of polyurethane at the same time, and the prepared polyurethane flexible material can be degraded at a certain rate and has antibacterial performance. In addition, due to the introduction of chitosan, the mechanical property of the flexible material prepared from polyurethane can be improved. The polyurethane flexible material prepared by the invention has the advantages of good mechanical and biocompatibility, controllable degradation rate and excellent antibacterial property.

The invention discloses a phase change temperature control polyurethane material and a preparation method thereof, and relates to the technical field of high polymer materials. When the phase change temperature control polyurethane material is prepared, vanadium dioxide and 4-anilino triethoxy silane react to prepare pre-modified vanadium dioxide; the pre-modified vanadium dioxide and N, N-dimethyl-4-nitrosoaniline are subjected to a reaction, and modified vanadium dioxide is prepared; the preparation method comprises the following steps: polymerizing phenylboronic acid and 3-chloropropylmethyldimethoxysilane, and blocking by using 1, 3-bis (3-hydroxypropyl)-1, 1, 3, 3-tetramethyldisiloxane, so as to prepare a borosiloxane oligomer; the preparation method comprises the following steps: polymerizing a borosiloxane oligomer, 1, 6-hexanediol and isophorone diisocyanate to prepare functional polyurethane; and uniformly mixing the functionalized polyurethane and the modified vanadium dioxide, and carrying out compression molding to obtain the phase-change temperature-control polyurethane material. The phase-change temperature-control polyurethane material prepared by the invention has excellent energy-saving temperature-control, anti-aging, antibacterial, self-healing and mechanical properties.

The present application relates to the technical field of biomedical materials, in particular to a non-viral gene carrier and a preparation method and application thereof. The non-viral gene carrier prepared by EDC / NHS cross-linking reaction of baicalin and polyethyleneimine can be used for gene delivery and preparation of a gene therapy drug. The present application further provides a nano-complex composed of the non-viral gene carrier and nucleic acid, which can be used for gene delivery and preparation of a gene therapy drug. The nano-complex can not only effectively deliver target genes into cells, but also synergize miR-34a and baicalin to jointly exert an anti-tumor effect, greatly enhancing the anti-tumor treatment efficacy.

The application relates to a kind of exoskeleton auxiliary devices for relieving muscle fatigue injury, and relate to the technical field of exoskeleton equipment, including upper limb exoskeleton assembly and lower limb exoskeleton assembly, the upper limb exoskeleton assembly and lower limb exoskeleton assembly are all unpowered power assisting structure, and modular adjustable design is adopted;The upper limb exoskeleton assembly includes shoulder joint energy storage assembly, screw adjusting mechanism and shoulder joint part, and the lower limb exoskeleton assembly includes sequentially connected lower limb thigh assembly, lower limb calf assembly, ankle joint part and foot bottom support part, the upper limb exoskeleton assisting range in the application is limited to the included angle of 45°~90° with the trunk, matches the core action interval of operation, the shoulder joint is designed through three degrees of freedom to match the human motion characteristics, the lower limb takes hip, knee and ankle as the core, releases elastic potential energy through energy storage component, specifically reduces the limb load, effectively reduces the risk of muscle strain caused by long time operation.

This invention discloses a multifunctional atomizing agent for ancient book restoration, its preparation method, and its application, belonging to the field of ancient book preservation technology. The atomizing agent is a mixed solution containing chitosan quaternary ammonium salt and zirconium carbonate. The method for treating ancient books using this atomizing agent is as follows: after cleaning the ancient books to remove impurities, they are placed in a sealed deacidification device. The mixed solution of chitosan quaternary ammonium salt and zirconium carbonate is atomized and then introduced to spray the pages of the ancient books. The books are then dried in a ventilated environment at ambient temperature to complete the treatment. The atomizing agent and treatment method of this invention have multifunctional effects on ancient books, including deacidification, strengthening, consolidation, antibacterial properties, and anti-aging. It avoids the uneven treatment caused by the coffee ring effect and phenomena such as yellowing and fading. Furthermore, it simplifies the ancient book restoration process, enabling one-step atomization, significantly shortening the processing flow, reducing processing operations, shortening the processing cycle, and significantly improving processing efficiency.

The application discloses soil sporosarcina CH23 and a method and application of synthesizing nano selenium by using the soil sporosarcina. Sporosarcina soli The nano selenium synthesis bacteria are soil sporosarcina (Sporosarcina siccitae) CH23, which are preserved in a Guangdong Microbial Culture Collection Center (GDMCC) and have a preservation number of GDMCC No. 67015. The soil sporosarcina CH23 can efficiently convert high-toxicity selenite into non-toxic nano selenium. The required culture condition is simple, low in cost and easy to operate. The produced nano selenium particles have the advantages of non-toxicity, high biological activity, stable property and almost no other selenium byproducts, and have the effects of antibiosis, antioxidation and anticancer in the medical field. In addition, the nano selenium can be used as a nano selenium fertilizer for plant selenium nutrition supplement, and has the advantages of higher efficiency, safety and environmental protection compared with traditional selenite selenium fertilizer.

The invention relates to the field of fruit and vegetable preservation, in particular to a preparation of a fresh-cut radish coating preservative and a preservation method of the fresh-cut radish coating preservative, the coating preservative comprises the following raw materials: 0.5%-2.0% of chitosan and 0.5 mmol / L-2mmol / L of salicylic acid which are prepared into a mixed preservation solution, and the soaking time is 1-5 minutes. Chitosan has certain oxidation resistance and antibacterial activity, and salicylic acid serving as organic acid has oxidation resistance and antibacterial activity and is widely applied to the fields of food, medicine, cosmetics and the like. The raw materials of the coating preservative have the characteristics of safety, greenness and no pollution, are low in price and rich in source, and are combined to achieve a synergistic effect, so that the oxidation resistance and the antibacterial activity of the coating preservative are improved, the nutrient loss and the quality reduction of the fresh-cut radishes during storage can be effectively relieved, the growth of microorganisms can be effectively inhibited, and the quality of the radishes is improved. The shelf life of the fresh-cut radishes is prolonged.

The invention discloses a preparation method of a high-elastic wear-resistant fabric, and relates to the technical field of textiles. When the high-elastic wear-resistant fabric is prepared, the chlorine-resistant additive is added in the spinning process to prepare the spandex fibers, and after the spandex fibers are woven into the spandex fabric, the spandex fabric is coated with the polyether amide film for light curing; the chlorine-resistant additive can enhance chlorine resistance and antibacterial property, and forms a passage in the spandex fiber, so that the spandex fiber has antistatic property; dendritic polyether amide contains a large amount of hydroxyl groups and can be connected to the surface of carboxylated graphene, so that a polyether amide film forms a cross-linked structure to coat the spandex fabric and react with the spandex fabric for cross-linking, the polyether amide film is cured and connected to the surface of the spandex fabric, and the wear resistance of the fabric is enhanced.

The invention relates to the technical field of antibacterial disinfectants, and provides a long-acting foam antibacterial disinfectant and a preparation method thereof.The method comprises the steps that gelatin is added into hot water to be fully stirred and dissolved, a gelatin solution with the mass fraction being 4-8% is formed, then 1-3 drops of glutaraldehyde solution are added into the gelatin solution, eucalyptus oil is immediately added after the gelatin solution is stirred to be uniform, and the mixture is stirred to be uniform; after uniformly stirring, performing vacuum drying for 0.5 to 1h to obtain a material A; adding 1-3 drops of glutaraldehyde solution into the material A, standing for 1.5-2 hours at the temperature of 20-25 DEG C, washing with water, and carrying out vacuum drying for 0.5-1 hour at the temperature of 80-100 DEG C to obtain a material B; fully grinding the material B to form antibacterial particles smaller than 50 microns; the long-acting foam antibacterial disinfectant is obtained by adding the antibacterial particles, the biguanide disinfectant, the antibacterial peptide and the surfactant into the propylene glycol solvent and uniformly mixing. According to the technical scheme, the problem of energy consumption waste of the foam antibacterial disinfectant in the prior art is solved.

The invention belongs to the technical field of biomedical materials, and discloses preparation of a low-swelling medical tissue sealant and application of the low-swelling medical tissue sealant in dura mater repair. The invention discloses a sealant. The sealant is prepared from the following raw materials: multi-arm polyethylene glycol active ester and aminated gelatin. The invention provides a sealant. The sealant is formed by crosslinking multi-arm polyethylene glycol active ester and aminated gelatin through amido bonds. The sealant has the advantages of rapid gelling, high mechanical strength, strong tissue adhesion, ultralow swelling ratio, controllable degradation and excellent biocompatibility. The sealant can realize in-situ sealing and repairing of dura mater injury and prevent leakage of cerebrospinal fluid, has antibacterial, anti-infection and nerve protection effects, is suitable for repairing of dura mater and dura mater, and is especially suitable for minimally invasive neurosurgery.

The invention provides a biomass composite reinforced PBAT multifunctional fully biodegradable plastic and a preparation method thereof, and relates to the technical field of materials. The method comprises the following steps: dispersing industrial alkali lignin in an ethyl acetate solvent to obtain an industrial alkali lignin solution; carrying out suction filtration on the industrial alkali lignin solution, and concentrating and drying the obtained filtrate to obtain lignin; then mixing the PBAT resin, lignin and a compatibilizer, and carrying out hot press molding after mixing is finished, so as to obtain the biomass composite reinforced PBAT multifunctional fully biodegradable plastic.

The invention relates to the technical field of shielding materials, and to a preparation method and material of a biomass carbon / silver composite electromagnetic shielding material, comprising: using hexadecyl trimethyl ammonium bromide solution to treat wood materials, and carbonizing the wood materials after the treatment to obtain biomass carbon; using hydrochloric acid solution, trishydroxymethylaminomethane solution and dopamine hydrochloride to prepare dopamine monomer solution, and using hydrogen peroxide solution and the prepared dopamine monomer solution to modify biomass carbon to obtain polydopamine-modified biomass carbon; using silver nitrate solution and ammonia solution to prepare silver ammonia solution, and immersing polydopamine-modified biomass carbon in the silver ammonia solution, adjusting the pH value of the silver ammonia solution, adding glucose solution, and ultrasonically reacting to obtain biomass carbon / silver composite electromagnetic shielding material. The invention can deposit silver nanoparticles on the surface and internal pores of biomass carbon modified by polydopamine, and has excellent electromagnetic shielding capabilities in both dual bands.

The invention discloses a novel printing ink preparation processing method which comprises the following steps: 1, heating 11-19% of pigment, 1-3% of a color correcting agent, 15-20% of a filler, 55-60% of synthetic resin oil, 11-16% of mineral oil varnish, 4-8% of an ink auxiliary agent and 3-5% of printing ink oil in a formula ratio to 200 DEG C in a reaction kettle for dissolving, adding the dissolved liquid into the reaction kettle, and uniformly stirring; stirring for 15-25 minutes at the rotating speed of 5000-9000 rpm by a high-speed dispersion machine, in the process, promoting the binder to preliminarily wet the interface of the pigment, crushing the aggregate of the pigment, discharging air and moisture adsorbed on the surfaces of pigment particles, and gradually loosening the aggregate of the pigment, sealing and storing the dispersed raw materials for 30 minutes at the temperature of 200 DEG C, thereby obtaining the pigment. 30ml of kerosene and tetradecyl alcohol are added, and nano copper oxide, nano cuprous oxide, nano copper, nano silver or nano gold are added, so that the ink has antibacterial property.

The utility model relates to the technical field of sanitary pads, in particular to a sanitary pad with a double-layer bacteriostatic structure, which comprises a surface layer, a functional core body is arranged on the base surface of the surface layer, and a bacteriostatic layer is arranged on the lower side of the surface layer. The first antibacterial sheet is made of natural bamboo fibers, the bamboo fibers are very good in hygroscopicity and air permeability, can rapidly absorb and evaporate moisture and keep dry and comfortable, the bamboo fibers have natural antibacterial and bacteriostatic performance and can restrain growth of bacteria, and the bamboo fiber sanitary towel not only has an excellent antibacterial effect, but also can effectively reduce peculiar smell in the menstrual period, and is good in antibacterial effect. The sanitary pad is simple in structure and suitable for women who are large in menstrual period and prone to side leakage, tea tree essential oil is arranged in the second antibacterial sheet, the tea tree essential oil is a natural plant antibacterial material and has the advantages of being antibacterial, antiseptic, anti-inflammatory and the like, most bacteria, viruses and fungi can be killed, meanwhile, peculiar smells can be removed, and therefore the antibacterial effect of the sanitary pad is better.

The utility model provides a kind of lyocell hemp jeans fabric, including perspiration wet layer, moisture-permeable layer and microchannel structure, perspiration wet layer is by cotton / lyocell blended warp and lyocell / hemp blended weft yarn alternative beating weft interwoven, moisture-permeable layer is by first warp and first weft yarn alternative beating weft interwoven, first warp uses cotton / lyocell blended yarn, first weft yarn uses lyocell / hemp blended yarn, microchannel structure is set between perspiration wet layer and moisture-permeable layer and is used to guide moisture from perspiration wet layer to moisture-permeable layer flow, perspiration wet layer, microchannel structure and moisture-permeable layer are sequentially arranged from inside to outside.The utility model sets up microchannel structure between perspiration wet layer and moisture-permeable layer, guides moisture from perspiration wet layer to moisture-permeable layer flow, not only increases the wet path of fabric, is favorable to improve wet efficiency, by setting microchannel structure also can enhance air permeability, with good practicability.