30results about How to "Improve room temperature stability" patented technology

Disclosed is an aluminum alloy sheet resistant to deterioration through natural aging. The aluminum alloy sheet is an Al—Mg—Si aluminum alloy sheet containing 0.35 to 1.0 percent by mass of magnesium; 0.5 to 1.5 percent by mass of silicon; 0.01 to 1.0 percent by mass of manganese; and 0.001 to 1.0 percent by mass of copper, with the remainder being aluminum and inevitable impurities, in which the amount of dissolved silicon is 0.55 to 0.80 percent by mass, the amount of dissolved magnesium is 0.35 to 0.60 percent by mass, and the ratio of the former to the latter is 1.1 to 2. The aluminum alloy sheet may further contain 0.005 to 0.2 percent by mass of titanium with or without 0.0001 to 0.05 percent by mass of boron.

A composition of matter comprises a shelf stable, super critical, CO2 fluid extracted seed oil derived from a cracked biomass of perilla frutescens, the seed oil comprising from about 60 to about 95 percent w / w of PUFAs in a ratio of from about 4:1 to about 6:1 alpha-linolenic acid (ALA) to linoleic acid (LA) and a mixture of selected antioxidants.

The invention discloses a probiotics microcapsule wall material preparation method. The probiotics microcapsule wall material preparation method comprises the following steps: mixing sodium alginate,carrageenan and meal fiber, performing ultraviolet lamp irradiation for 15-30 min, mixing a mixture with an aseptic phosphoric acid buffer solution with a pH value being with 6.8-7.4, performing water-bath dissolving at the temperature of 70-85 DEG C to prepare a wall material solution with mass concentration being 8.5-10.5%, wherein in the wall material solution, the mass concentration of the meal fiber is 1-5%, the mass concentration of sodium alginate is 2-4%, and the mass concentration of carrageenan is 4.5-6.5%. The invention also discloses the preparation method of the probiotics microcapsule, the volume ratio of an oligosaccharide solution (the mass concentration is 3-5%) to a probiotics suspension (greater than 5*107 CFU / mL) is 1:2-2:1. The probiotics microcapsule has the advantages of high embedding rate, high live bacteria number, high stress resistance, simple operation, economic performance, easy operation, and is suitable for industrial production.

The invention discloses a probiotic microcapsule and a preparation method thereof, and relates to the technical field of probiotics. The probiotic microcapsule comprises an oil-phase matrix directly contacting probiotics, a continuous water-soluble wall material wrapping the oil-phase matrix, and powder particles agglomerated on the outermost layer. The preparation method comprises the following steps: mixing a probiotic liquid / probiotic powder and a fat-soluble substance to prepare a W / O emulsion; adding the emulsion prepared in the previous step into a prepared aqueous phase solution to prepare a W / O / W double-layer emulsion; and carrying out centrifugal spray agglomeration and built-in fluidized bed drying to obtain the probiotic microcapsules. According to the invention, the microcapsules have multi-layer protection on the periphery of the probiotics, wherein the fat-soluble substances protect, then the water-soluble wall material protects the grease, and finally the peripheral agglomerated particles have isolation effect; and the probiotic microcapsules prepared by the invention can be used for functional foods or dietary nutrition supplements.

The invention provides a method for preparing daily chemical microencapsulated probiotic. The method comprises the steps that: first, three probiotics which are lactobacillus acidophilus, lactobacillus plantarum and lactobacillus rhamnosus are fermented and centrifuged; such that wet cells are obtained; emulsifying, pre-freezing and freeze-drying are carried out; First embedding is carried out upon the obtained probiotic powder by using a crosslinked product of gelatin and TG enzyme; and second embedding is carried out by using a mixture of soluble starch, maltose and maltodextrin. With the method, the prepared microencapsulated probiotic has an embedding rate reaching 87%. The microencapsulated probiotic can be used in daily chemicals used for inhibiting acnes, relieving allergy symptoms, and lightening spots.

The present invention relates to lyophilized formulations of pegylated interferon which are prepared using trehalose as a cryoprotectant. The formulations have a low moisture content, which helps stabilize the pegylated interferon during storage of the formulations at room temperature. In addition, methods for preparing these formulations are provided.

The invention discloses a powder metallurgy method for obtaining a dispersive rare-earth oxide reinforcing phase from titanium alloy, which comprises the following steps: adding rare-earth elements in a form of rare-earth hydride powder, fully mixing the rare-earth hydride powder, hydrogenated and dehydrogenated titanium powder and other necessary alloy powder or alloy element powder, performing cold isopressing molding or compression molding, then sintering a pressed blank in vacuum at the high temperature, and finally performing high-temperature deformation on the sintered titanium alloy, wherein the deformation mode can be forging, rolling, extruding and the like. The method of the invention simplifies the production processes, can obtain the ideal rare-earth oxide reinforcing phase, and improves the comprehensive mechanical property of the titanium alloy.

The invention discloses a preparation method of silicon oxide / phenolic aldehyde binary composite aerogel. The invention aims to overcome the shortcomings of an existing technology and enhance the acid-base compatibility of silica sol and phenolic aldehyde. Self-made alkaline alcohol-solvent silica sol is mixed with a phenolic resin sol system, and a high-temperature sol-gel reaction is adopted soas to obtain the silicon oxide / phenolic aldehyde binary composite aerogel material under the condition of normal pressure drying. According to the method, the alkaline silica sol is adopted as a silicon source, when the alkaline silica sol is compared with traditional acid silica sol, better compatibility with the alkalinity of a phenolic aldehyde curing system can be achieved, and the room temperature stability of the composite sol is improved, so that application in a practical industrial process becomes possible; and meanwhile, formation of a hybrid aerogel interpenetrating network structure can be improved effectively through the compatibility.

The invention discloses an external probiotics microcapsule preparation method. By making full use of the synergistic effect of plant extracts and probiotics, on one hand, survival rate and entrapment rate are cooperatively increased; on the other hand, the plant extracts have a further effect on skin care. The external probiotics microcapsule preparation method includes the steps: (1) respectively inoculating freeze-dried powder of bifidobacteria, lactobacillus acidophilus and lactobacillus rhamnosus into a triangular flask for activating treatment, enlarging fermentation cultivation and mixing fermentation liquor of the bifidobacteria, the lactobacillus acidophilus and the lactobacillus rhamnosus according to the volume ratio 3:3:4 to obtain bacterial suspension; (2) preparing nostoc commune extracts; (3) adding Tween-80 for emulsion into the bacterial suspension, the nostoc commune extracts and sodium alginate solution, curing the bacterial suspension, the nostoc commune extracts and the sodium alginate solution, filtering the bacterial suspension, the nostoc commune extracts and the sodium alginate solution by gauze after a wet capsule is formed, and flushing the wet capsule for three times by normal saline.

The invention provides a water-in-oil-in-water emulsion, and an application and a use method thereof. The water-in-oil-in-water emulsion comprises the following components by mass percent: 70-98wt% of oil phase, 1-29wt% of hydrophilic surface active agent and 1-29wt% of lipophilic surface active agent, wherein the hydrophilic surface active agent comprises one or more of polyethylene glycol 264 monoleate, polyethylene glycol 400 monoleate and polyethylene glycol 600 monoleate. The emulsion provided by the invention has the beneficial effects of ultrahigh stability and high stability of vaccine solution under room temperature. A research proves that the stability of the emulsion provided by the invention is equivalent to the stability of ISA206 adjuvant.

The invention relates to the field of abrasion-resistant alloy materials, in particular to a VCp reinforced composite abrasion-resistant alloy material and a preparation method thereof. The VCp reinforced composite abrasion-resistant alloy material comprises the following components in percentage by mass: 2.0-3.2% of C, 6.5-10.5% of V, 0.5-1.5% of Si, 0.8-1.5% of Mn, 1.0-3.5% of Cr, 1.0-2.5% of Mo, 0.5-2.0% of Ti, less than or equal to 0.04% of S, less than or equal to 0.06% of P and the balance of iron. According to the VCp reinforced composite abrasion-resistant alloy material prepared by adopting the preparation method provided by the invention, the retained austenite quantity of the VCp reinforced composite abrasion-resistant alloy material and the carbon content of the retained austenite are increased, the room temperature stability is improved, and the impact toughness is improved. Meanwhile, as the carbon content of the retained austenite is increased, and the retained austenite can generate local phase transformation to form martensite under the action of external stress, so that the local hardness and abrasion resistance of base material are improved. Through the traditional technology for heating processing, the generated retained austenite quantity is relatively small, and the retained austenite is relatively low in stability due to relatively low carbon content under the action of external stress, therefore negative influences are caused to the abrasion resistance of the material.

The invention belongs to the technical field of organic silicon adhesives, and provides a single-component thermocuring organic silicon adhesive for bonding an electric kettle and a preparation method of the single-component thermocuring organic silicon adhesive. The single-component thermocuring organic silicon adhesive for bonding the electric kettle comprises the following components in parts by weight: 100 parts of vinyl silicone oil, 3-6 parts of hydrogen-containing silicone oil, 10-30 parts of dimethyl silicone oil, 10-20 parts of modified fumed silica, 8-15 parts of a tackifying composition, 0.05-0.2 part of a microcapsule type platinum complex and 0.01-0.02 part of a compound inhibitor. According to the single-component thermocuring organic silicon adhesive for bonding the electric kettle, the normal-temperature activity of a catalyst is reduced by adopting a microcapsule type platinum complex, the normal-temperature stability of a system is improved by efficiently compounding an inhibitor, the adhesive has enough long storage performance and operation time at room temperature and can be rapidly cured under a heating condition, and the tackifying composition is added to ensure the bonding performance of stainless steel and a boronized glass base material; and the preparation method is feasible and can be suitable for large-scale production.

The invention discloses an organic silicone defoaming agent for PVC and a preparation method thereof, and relates to industrial defoaming agents. The organic silicone defoaming agent comprises the following components in percent by mass: 10-20% of a main defoaming agent; 5-10% of an auxiliary defoaming agent; 1-2% of suspended stable water; 70-80% of deionized water; and 1-3% of an acid-base regulator. The preparation method comprises the following steps: firstly adding a stable water mother liquid to the deionized water, performing stirring for 15-20 minutes, adding the acid-base regulator, slowly regulating the pH of the stable water to be 6-7, then adding the main defoaming agent of modified silicon and the auxiliary defoaming agent of water-soluble ether when the stable water pH is stable and the solution is transparent, performing stirring for 25-30 minutes, and finally performing shearing treatment to obtain the organic silicone defoaming agent. The organic silicone defoaming agent for PVC can make the defoaming agent have good antifoaming effects under high temperature conditions, the production process of the organic silicone defoaming agent is simple, and the storage of the organic silicone defoaming agent is stable.

The invention discloses a high-toughness water-based ceramic coating. The coating is a water-based, single-component, baked and dried product and is prepared from polyurethane modified nano ceramic emulsion, silicon resin emulsion, a high-temperature-resistant pigment, a filler, auxiliaries, an ammonium toluene-4-sulphonate neutralizer and water. The coating is convenient to construct and extremely low in coating VOC emission, has excellent flame retardance, heat resistance, corrosion medium shielding, bending resistance and impact resistance, and is an excellent choice for high-temperature-resistance and high-durability anti-corrosion protective coating.

The invention discloses an epoxy resin latent curing agent and a preparation method thereof. According to the invention, polybasic carboxylic acid containing a benzene ring and an imidazole compound are used as raw materials, and an imidazolium carboxylate structure is formed at a certain temperature. As a latent curing agent, the epoxy resin latent curing agent can initiate ring-opening polymerization of epoxy resin at a medium temperature, and has good thermal reaction activity and latent heat performance. By introducing alkyl and benzene ring groups, the crosslinking density of the resin can be improved, the performance of the resin can be enhanced, and the epoxy resin latent curing agent has wide research potential and application background in an epoxy resin system.

The invention discloses a diaphragm for a solid electrolyte of a lithium battery and a preparation method of the diaphragm, and belongs to the technical field of lithium ion batteries. The preparation method comprises the following steps: adding a lithium salt, a polymer electrolyte, a metal oxide, a surfactant and a binder into a solvent to obtain slurry 1; adding a lithium salt, a polymer electrolyte, a metal oxide, a surfactant, a binder, the surface grafted polymer brush magnesium borate nanowire and an organic tin stabilizer into a solvent to obtain slurry 2; coating the slurry 1 and the slurry 2 on the surfaces of the two sides of a base film respectively, and then drying; the magnesium borate nanowire is subjected to polymer brush grafting treatment, and the organic tin stabilizer is added, so that the solid electrolyte containing the magnesium borate nanowire can operate stably; the magnesium borate nanowires are added into the coating, close to the negative electrode of the lithium battery, of the diaphragm, so that the ionic conductivity of the electrolyte diaphragm is enhanced, and the problem of short circuit of the battery caused by growth of lithium dendrites at the negative electrode due to non-uniform deposition of lithium ions at the negative electrode is avoided.

The invention provides compound lidocaine nano-liposome gel and a preparation method thereof. The nano-liposome gel is prepared from the following raw materials: lidocaine hydrochloride, tetracaine hydrochloride, tetracaine base, lidocaine base, dyclonine hydrochloride, procaine hydrochloride, soyabean lecithin, cholesterol, xanthan gum, carbomer and sodium carboxymethyl cellulose. The preparationmethod of the nano-liposome gel comprises the following steps: S1, preparing raw materials; s2, mixing soyabean lecithin and cholesterol to obtain a mixture A; s3, dissolving carbomer to obtain a mixture B; and S4, adding lidocaine hydrochloride, tetracaine hydrochloride, dyclonine hydrochloride, procaine hydrochloride and the mixture B into the mixture A, performing stirring, adding tetracaine alkali and lidocaine alkali, performing cooling, adding xanthan gum and sodium carboxymethyl cellulose, performing stirring, and performing homogenizing to obtain the compound lidocaine nano-liposome gel. The nano-liposome gel provided by the invention is good in stability in a normal-temperature state and a low-temperature state.

The invention discloses a novel high-stability transparent silver ion complex, and a preparation method and application thereof. The novel high-stability transparent silver ion complex comprises silver nitrate, a pyrrolidone compound and a solvent; the pyrrolidone compound can absorb ultraviolet light, so that a discoloration phenomenon caused by the fact that silver ions absorb the ultraviolet light to improve activity is avoided. The silver ion complex disclosed by the invention is good in water solubility, high in transparency, good in stability, high in compatibility, low in addition amount in daily chemical products, safe and mild to use, and capable of enabling daily chemical products to have good antibacterial and bacteriostatic stability.