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39results about How to "Improve active performance" patented technology

Modification method of basalt fiber in basalt fiber sprayed concrete for tunnel

The invention discloses a modification method of basalt fibers in basalt fiber sprayed concrete for tunnels, which comprises the following steps: soaking the basalt fibers for 2 hours by using an acetone solution, completely washing the basalt fibers by using tap water, soaking the basalt fibers for 1 hour by using a silane coupling agent-absolute ethyl alcohol solution after the basalt fibers are dried, and taking out the basalt fibers; the preparation method comprises the following steps: 1, soaking basalt fibers in a silane coupling agent-absolute ethyl alcohol solution, heating the basalt fibers in a drying oven at 120 DEG C for 1 h to completely react the basalt fibers with the silane coupling agent, cooling the basalt fibers, and 2, carrying out thermal improvement treatment on the basalt fibers before soaking in the silane coupling agent-absolute ethyl alcohol solution, and treating the basalt fibers in a surface modification solution. Active groups of the KH560 type silane coupling agent can form hydrogen bonds or covalent bonds with the surface of basalt, and each unit group is subjected to dehydration condensation through a Si-O main chain and is paved on the surface of fiber to form a continuous new surface layer, so that defects on the surface of the fiber are repaired, filled and wrapped, and weak links of the KH560 type silane coupling agent are reduced.
Owner:北京玄泽新材料科技有限公司

Double-layer microcapsule with long-acting repairing performance

The invention discloses a preparation method for a double-layer microcapsule with long-acting repairing performance. The preparation method comprises the following steps: (1) preparation of SDB nanospheres: weighing an azo initiator, adding the azo initiator into a mixture of styrene, divinylbenzene and an anionic surfactant to prepare an oil-in-water Pickering emulsion, and subjecting the Pickering emulsion to heating and a reaction under the protection of nitrogen so as to obtain the white solid SDB nanospheres; (2) preparation of SDB/PMMA nanocomposite particles: weighing PMMA, adding the PMMA into water, adding the SDB nanospheres, allowing the PMMA to swell into the SDB nanosphere, adding an oxidizing agent, then adding inorganic acid drop by drop, and allowing the PMMA to fully undergo polymerization so as to obtain the SDB/PMMA nanocomposite particles; (3) preparation of ZIF-8/PMMA hollow microspheres: adding the SDB/PMMA nanocomposite particles and 2-methylimidazole into anhydrous methanol, adding zinc nitrate, carrying out a reaction to obtain ZIF-8/SDB/PMMA composite particles, and adding the ZIF-8/SDB/PMMA composite particles into an organic solvent to remove a SDB template so as to obtain the ZIF-8/PMMA hollow microspheres; and (4) loading of a repairing agent or a corrosion inhibitor: soaking the ZIF-8/PMMA hollow microspheres into a repairing solution to obtain the ZIF-8/PMMA/repairing solution microcapsule.
Owner:CHENGDU TECHCAL UNIV

Bamboo fiber flakeboard adhesive and preparation method of bamboo fiber flakeboard adhesive

The invention discloses a bamboo fiber flakeboard adhesive and a preparation method of the bamboo fiber flakeboard adhesive. The adhesive includes, by matching ratio, 32% of formaldehyde solution, 20% of sodium hydroxide solution, 31% of urea, 6% of ammonium chloride solution, 5% of formic acid, 3% of waterproof agent and 3% of polyvinyl alcohol. The preparation method includes the steps that the formaldehyde solution is added into a reaction still, and the first batch of urea and the waterproof solution are added in; when the temperature is raised to 40 DEG C, the polyvinyl alcohol is added in, and the temperature is kept for 10-30 min when being raised to 90 DEG C; after 30 min, the second batch of urea is added in, the sodium hydroxide solution is added in and the temperature is lowered; the third batch of urea is added in when the temperature is 80 DEG C; the fourth batch of urea is added in when the temperature is 68 DEG C; discharging is performed when the temperature is lower than 40 DEG C. According to the bamboo fiber flakeboard adhesive and the preparation method of the bamboo fiber flakeboard adhesive, the molar ratio is 0.3, free urea in resin is decreased, and the joint degree of the adhesive is improved; the curing time of a surface layer is shortened, free formaldehyde in the resin is captured, the release amount of the free formaldehyde is reduced and is reduced to 5.5mg /100 g from 27mg /100g, the processing process is simple, the bonding strength is high, and environment friendliness is achieved.
Owner:CHISHUI XINSHENG BAMBOO FIBER

Biomass-based activated carbon coated iron carbide three-dimensional porous microbial fuel cell anode material, anode and preparation methods

The invention provides a biomass-based activated carbon coated iron carbide three-dimensional porous microbial fuel cell anode material, which is composed of biomass-based activated carbon and iron carbide, wherein iron carbide is distributed in the biomass-based activated carbon and is coated by the biomass-based activated carbon to form micron-sized activated carbon-coated iron carbide particles, and the anode material has a three-dimensional porous network structure consisting of micron and nano composite holes. The invention also provides a microbial fuel cell anode based on the anode material, and preparation methods of the anode material and the anode. According to the invention, the problems of unfavorable attached growth of microorganisms and high modification cost of the existingmodified three-dimensional carbon-based electrode are solved, and the attached growth of an anode biological membrane can be promoted and the electron transfer of an extracellular interface can be accelerated while the cost of the microbial fuel anode is reduced.
Owner:SICHUAN UNIV

Chlorempenthrin smoke generator

The invention discloses a chlorempenthrin smoke generator. The chlorempenthrin smoke generator is characterized by comprising, by weight, 0.1-70% of chlorempenthrin and the balance agriculturally acceptable heat supply agents. The heat supply agents comprise agriculturally acceptable fuel, oxidizing agents and auxiliaries, the agriculturally acceptable fuel is used for preparing smoke generators, and the oxidizing agents comprise one or a plurality of types of potassium chlorate, ammonium nitrate, potassium nitrate, sodium nitrate, sodium nitrite, potassium perchlorate and potassium permanganate. The fuel comprises one or a plurality of types of corncob, cow dung powder, straw, bagasse, wood powder, charcoal, white sugar, starch, sulfur, ammonium thiocyanate and urotropine. The auxiliaries comprise one or a plurality of types of smoke agents, combustion guide agents, flame retardant chemicals, cooling agents, weighting agents, adhesive, moisture-proof agents and stabilizers. The chlorempenthrin smoke generator has the advantages that the activity of agents of the chlorempenthrin smoke generator can be enhanced, the adhesive, permeation and dissolving capacity of the chlorempenthrin smoke generator can be improved, and comprehensive biological effectiveness of contact killing, respiration inhibition and the like of the chlorempenthrin smoke generator can be sufficiently played; the chlorempenthrin smoke generator can be dissolved fast and is low in residual quantity and little in environmental pollution; the chlorempenthrin smoke generator can be applied without optional equipment or apparatuses, accordingly, work and labor can be saved, energy can be effectively saved, and the chemical use costs can be reduced for farmers.
Owner:郭秦

Preparation method for taurine-modified novel giant squid gelatin multifunctional peptide

The invention provides a preparation method for a taurine-modified novel giant squid gelatin multifunctional peptide and belongs to the technical field of biotechnology. The preparation method comprises the following steps: 1) supplying a carboxyl component which is from a protective peptide fragment with amino acid sequence of SEQ ID NO.1; 2) supplying an amino component which is from taurine; 3)supplying condensation reaction under the existence of condensing agent, and forming a peptide bond between the carboxyl component and the amino component, wherein the condensation reaction is performed under the existence of formylglycine and p-aminophenylalanine; 4) supplying amino deprotection reaction, thereby removing a protection group from an amino terminal on a condensation reaction product through the reaction. The preparation method for the novel multifunctional peptide provided by the invention has the advantages of high reaction speed, less synthesis time consumption, high conversion rate of reaction, low production cost, high activity and purity of products and few by-products. The prepared multifunctional peptide has biological activity functions of resisting against oxidation, removing free radicals, boosting brain development, and the like.
Owner:ZHEJIANG OCEAN UNIV

Electret melt-blown polypropylene material and preparation method thereof

The invention discloses an electret melt-blown polypropylene material and a preparation method thereof. The electret melt-blown polypropylene material is prepared from, by weight, 0.5-2 parts of nano cellulose, 97.7-99.4 parts of melt-blown polypropylene and 0.1-0.3 part of an antioxidant. The nano cellulose is added into the material, the nano cellulose is distributed in a polypropylene matrix to prevent the crystalline state of polypropylene by utilizing the higher length-diameter ratio and smaller particle size of the nano cellulose, and is limited by the rod-like structure of the nano cellulose, so that polypropylene crystals distributed around the nano cellulose easily grow into a slender shape along the wall of the nano cellulose, so charge drift is effectively prevented. Meanwhile, the surface of the nano cellulose is rich in hydroxyl, has relatively high activity, effectively attracts and traps charges, and prevents charge loss. Therefore, the electron capturing capability and the lasting electrification capability of the polypropylene melt-blown non-woven material after electret treatment are improved, the filtering effect of the material is improved, and the service life of the material is prolonged.
Owner:HEFEI GENIUS NEW MATERIALS

A kind of preparation method of novel Alaska cod multifunctional peptide modified by taurine

The present invention provides a novel taurine-modified Alaska cod multifunctional peptide, which comprises: a natural polypeptide with an amino acid sequence of SEQ ID NO.1, and a substituent bound to the polypeptide and introduced for modification, The substituent is taurine; the preparation method of the polypeptide includes preparation of protective peptide fragments, microwave condensation reaction, and deamination protection reaction, wherein the steps of preparing the protective peptide fragments are: dissolving the natural polypeptide in sodium carbonate solution, adding amino-containing The acetone solution of the terminal protection group and the promoter is stirred and reacted, extracted and precipitated; the above-mentioned promoter includes anthranilic acid and isonicotinamide. The novel polypeptide provided by the invention has high activity, good stability, no helical structure, good fluidity and high swelling rate, and has biological activities such as anti-oxidation, scavenging free radicals, and promoting brain development; the reaction conversion rate and yield during preparation are high, The synthesis time is short, the yield of by-products is low, the product is easy to purify, and the production cost is low.
Owner:ZHEJIANG OCEAN UNIV
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