130results about How to "Improve heat stability" patented technology

The invention discloses a multi-effect biological fermentation essence milk containing a skin external preparation and a preparation method and application thereof, and the preparation method specifically comprises the following steps: inoculating saccharomycetes into a fermentation substrate composed of coix seeds, sorghum seeds, vegetable oil and water, and carrying out fermentation culture and sterilization to obtain the fermentation essence milk, wherein the saccharomycetes are composed of yellow wine saccharomycetes and saccharomyces cerevisiae, and the viable count ratio of the yellow wine saccharomycetes to the saccharomyces cerevisiae is 1: (0.5-5). According to the present invention, the active components of coix seed and vegetable oil are effectively utilized by using the yellow wine yeast and the saccharomyces cerevisiae in the fermentation manner so as to obtain the fermented essence milk containing the active components of natural plants, such that the loss of the active components is reduced while the fermented essence milk has good repairing, tightening and anti-aging effects, and does not have any side effect; under the condition that no additive is added, the cold-resistant and heat-resistant oil has ideal cold-resistant and heat-resistant stability, and can be widely applied to the field of cosmetics.

The invention discloses a halogen-free flame-retardant reinforced PBT (polybutylene terephthalate) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The halogen-free flame-retardant reinforced PBT composition comprises polybutylene terephthalate, a halogen-free flame retardant, a melamine flame-retardant synergist, glass fibers, a phenol amide metal deactivator, a free radical trapping agent and a hydroperoxide trapping agent. According to the halogen-free flame-retardant reinforced PBT composition disclosed by the invention, under the combined action of all the components, the effects of improving the flame retardance, the ignition temperature of a glowing filament and the heat-resistant stability can be achieved, and the halogen-free flame-retardant reinforced PBT composition has relatively high mechanical properties. The flame retardant property of the halogen-free flame-retardant reinforced PBT composition reaches V-0 or above, the tensile strength is 95 Mpa or above, the glowing filament ignition temperature is 800 DEG C or above, and the thermal weight loss T1% temperature is 335 DEG C or above.

The invention provides a polyvinylidene fluoride-based nanofiber yarn wave-absorbing fabric as well as a preparation method and application thereof, and belongs to the technical field of preparation of wave-absorbing composite materials. The preparation method comprises the following steps: preparing nanofiber yarns or nanofiber core-spun yarns by adopting a conjugate electrostatic spinning technology, directly adding a conductive substance into a spinning solution to form conductive nanofibers, and further coating the nanofiber yarns or the nanofiber core-spun yarns with a PDA shell layer to improve the wear resistance and reduce silver nanoparticles in situ; finally, the yarns are woven into fabric through a weaving or knitting technology, and the fabric is applied to the fields of buildings, electromagnetic protective clothing, flexible electronics and the like. Compared with an existing microwave absorbing material, the fabric-based material is light in weight and good in mechanical flexibility and processability. Fabrics formed of nanofiber yarns or nanofiber core spun yarns facilitate the induction of interfacial polarization and multiple reflections, and can deeply design material properties. The material provided by the invention has better wear resistance, wearability and microwave absorption performance, and is suitable for actual production and application.

The invention belongs to the technical field of flame retardants, and discloses a polymer additive as well as a preparation method and application thereof. The polymer additive comprises aluminum diethylphosphinate of which the structural formula is as shown in a formula (I) and aluminum ethylbutyl phosphinate of which the structural formula is as shown in a formula (II); the polymer additive satisfies a double enthalpy ratio [delta] H defined by the following formula (1): 0.92 < = [delta] H < = 1.06; 130 DEG C < = T1 < = 155 DEG C, 165 DEG C < = T2 < = 185 DEG C; formula (1): [Delta] H = H2 / H1. The polymer additive has better heat-resistant stability, so that the polymer additive is more difficult to decompose in the processing process, and the corrosion of the polymer additive to metal processing parts of metal production equipment is reduced; and # imgabs0 #.

The invention discloses a coating as well as a preparation method and application thereof and a coated product. According to the coating provided by the invention, the curing modification of the epoxy resin coating is realized by adjusting the components of the curing agent: a primary amine group contained in the curing agent reacts with an epoxy group to generate secondary amine and hydroxyl, and nitrogen atoms can improve the heat-resistant stability of a cross-linked network; a phenolic hydroxyl group reacts with an epoxy group to generate an ether bond and a hydroxyl group, and the ether bond can improve the overall flexibility of an epoxy resin coating; the anhydride group reacts with the epoxy group to generate various anhydride epoxy intermediates, so that the overall heat resistance of the epoxy resin is improved; the introduction of the ammonium salt can reduce the curing temperature of the epoxy resin, and the introduction of the metal ions can improve the anti-rust performance of the epoxy coating. Finally, the curing agent is used for curing the epoxy resin, so that the corrosion resistance, the adhesive property and the high-temperature resistance of the coating can be remarkably improved, and the application requirements in extremely severe environments such as high humidity and heat, acid-base corrosion and the like can be met.

The invention discloses high-temperature-resistant and corrosion-resistant unsaturated polyester resin for a grid and a preparation method thereof, and belongs to the technical field of unsaturated polyester resin. The raw materials comprise the following components in parts by weight: 330 to 400 parts of isophthalic acid, 55 to 80 parts of 1, 4-cyclohexanedimethanol, 150 to 200 parts of ethylene glycol, 125 to 220 parts of first reaction stage propylene glycol, 0.2 to 0.6 part of a catalyst, 0.1 to 0.3 part of a first reaction stage antioxidant, 90 to 120 parts of second reaction stage propylene glycol, 30 to 50 parts of phthalic anhydride, 300 to 380 parts of maleic anhydride, 0.1 to 0.3 part of a second reaction stage antioxidant, 0.1 to 0.5 part of a polymerization inhibitor and 600 to 630 parts of a cross-linking agent. The high-temperature-resistant and corrosion-resistant unsaturated polyester resin for the grating has the characteristics of high corrosion resistance, high temperature resistance and high mechanical property, is low in cost and is suitable for being used as a raw material for manufacturing the grating.

The invention relates to the technical field of particle refining agents, in particular to a 7-series aluminum-zinc alloy particle refining agent which comprises the following raw materials in parts by weight: 35-45 parts of potassium chloride, 10-15 parts of calcium fluoride, 7-11 parts of a graphene modifier, 6-8 parts of a modifier based on modified sol and 5-8 parts of magnesium chloride. According to the particle refining agent, potassium chloride, calcium fluoride and magnesium chloride are adopted as a refining agent matrix, the graphene modifier and the modifier based on modified sol are added to be blended, coordinated and jointly synergized, the obtained refining agent product can optimize the hydrogen removal rate and the slag removal rate performance, meanwhile, the effect of improving the strength and the elongation performance of aluminum-zinc alloy is obvious, and the refining agent is suitable for industrial production. And the corrosion resistance and the heat-resistant stability of the product are optimized.

The invention relates to the technical field of microcapsules, in particular to an organic-inorganic hybrid slow-release essence microcapsule and a preparation method thereof. The invention discloses an essential oil silane coupling agent which comprises the following components in percentage by weight: 10-35% of essential oil, 1-10% of a silane precursor, 0.01-2% of a silane coupling agent, 1-15% of polyisocyanate, 0.01-10% of an emulsifier, 0.01-10% of a polyamine compound and the balance of deionized water. Through the combination of sol-gel and interfacial polymerization methods, the stability of the essence is improved, so that the essence is not easy to volatilize or decompose after being stored for a long time or in different environments, the essence is effectively prevented from being in direct contact with air, and the lasting time of the fragrance is prolonged; in the using process of the organic-inorganic hybrid essence microcapsule, active substances are released in a slow release mode through the microcapsule, and environmental pollution and diffusion can be reduced.

The present invention provides a freeze-dried chocolate and a preparation method thereof, and belongs to the fields of chocolate processing technology and freeze-dried food processing technology. The freeze-dried chocolate of the present invention uses chocolate powder with a total oil content of ≤25% and a particle size of ≤35μm as a raw material, and the chocolate powder and a solvent are mixed and then molded, freeze-formed, freeze-dried and demolded in sequence to obtain freeze-dried chocolate. The skeleton of the porous structure of the freeze-dried chocolate of the present invention is a non-lipid substance, which will not constitute a continuous oil phase, and will not deform, collapse or precipitate oil due to the melting of oil at high temperatures. Experiments have shown that at a temperature of 65°C, the freeze-dried chocolate product prepared according to the preparation method of the present invention does not have the problem of sticking to the packaging bag and product deformation, and has excellent anti-melting properties and heat-resistant stability, so that chocolate can truly become a product that can be transported and sold in all seasons, and can be transported and sold at room temperature without refrigeration.

The invention discloses a preparation method of a light sodium lignin sulfonate dispersing agent, which comprises the following steps: (a) precipitating and filtering papermaking black liquor to remove impurities, performing membrane concentration treatment on filtrate, intercepting crude lignin with the relative molecular weight of 10 * 10 < 3 >-30 * 10 < 3 >, and performing acid precipitation and filter pressing treatment to obtain high-purity lignin; (b) mixing the lignin prepared in the step (a) with a sulfonating agent and water to carry out sulfonation reaction, then adding formaldehyde to carry out condensation reaction, and then adding sodium peroxide to carry out oxidation reaction; and (c) after the reaction is finished, carrying out spray drying on the reaction liquid, and uniformly mixing the obtained sodium lignin sulfonate powder with a low-foam wetting agent DP-225 and an acrylic acid-maleic acid copolymer sodium salt according to a mass ratio of 1: (0-0.25): (0-0.2) to obtain the light sodium lignin sulfonate dispersing agent. The dispersing agent prepared by the preparation method disclosed by the invention has the advantages of reduction of fiber contamination, better dispersity and heat-resistant stability, and suitableness for being used as a dye dispersing agent and the like.

The invention relates to a composition for a holographic recording medium and the holographic recording medium. The composition for the holographic recording medium comprises the following components: a substrate film-forming substance, an active monomer, a photoinitiator and the like. Wherein a substrate film-forming substance mainly adopts a mechanical support as an active monomer to construct a free shuttling spatial network structure, and needs certain rigidity and heat-resistant stability, and tests show that the rigidity and heat-resistant stability of the material can be obviously improved by introducing unsaturated ring structures such as a benzene ring, a naphthalene ring and a do-not ring into the structure; therefore, a powerful spatial network structure is provided for free shuttling of the active monomers, and the display effect of the holographic recording medium is guaranteed.

The invention relates to the technical field of acrylic emulsion, in particular to high-stability salt-spray-resistant water-based acrylic emulsion and a preparation method thereof. The preparation method comprises the following steps: adding amino-terminated polyamidoamine into dichloromethane, uniformly stirring, dropwise adding acryloyl chloride, carrying out rotary evaporation, adding into water, adding butyl acrylate, styrene, 3-mercaptopropionic acid, acrylic acid and an emulsifier, and stirring to obtain a prefabricated material a; adding sodium carbonate into water, stirring, adding the prefabricated material a and sodium persulfate, and stirring to obtain a prefabricated material b; adding carbon nanotubes into an ethanol aqueous solution for ultrasonic dispersion, adjusting the pH value of the system, adding tetrabutyl titanate for ultrasonic treatment, adding triethylamine and a silane coupling agent for ultrasonic treatment, and performing vacuum drying to obtain a prefabricated material c; adding the prefabricated material a into the prefabricated material b, stirring, adding ammonium persulfate, stirring, filtering, adding the prefabricated material c, a dispersing agent, an anti-rust pigment and water, uniformly mixing, grinding and filtering. The emulsion can be dispersed to form a stable emulsion, the film forming compactness is excellent, the water resistance and the salt fog resistance are improved, and the heat-resistant stability is greatly enhanced.

The present invention relates to the field of thermoplastic polyimide materials, and discloses a thermoplastic polyimide composition and its application, thermoplastic polyimide preparation and its application. The composition comprises component A, component B and optional component C; component A is a thermoplastic polyimide resin having a structure shown in formula (1): wherein Ar is a residue of a diprimary amine monomer; Ar is selected from one or more of the following groups: x is 0.45-0.9; EG is a capping agent residue, selected from one of the following groups: the viscosity of the thermoplastic polyimide resin at 30°C is 0.35-0.55dL / g; component B is an imide oligomer; and component C is an additive. The thermoplastic polyimide composition has the characteristics of low extrusion temperature, high melt index and high heat resistance stability.

This invention discloses a Pickering emulsion based on silk fibroin self-assembled particles and its preparation method. The preparation method includes the following steps: adjusting the pH of the silk fibroin solution to 4.0-4.5, adding NaCl to a final concentration of 0.05-0.1 mol / L, mixing, and then heating to 40-50 °C and allowing it to stand at a constant temperature. Using the obtained silk fibroin self-assembled particle dispersion as the aqueous phase and vegetable oil as the oil phase, the mixture is mixed with excipients and homogenized by high-speed shearing to obtain a primary emulsion. This primary emulsion is then treated by high-pressure microfluidic jet to obtain the Pickering emulsion based on silk fibroin self-assembled particles. This method requires no chemical modification or exogenous reagents, is green and simple, and does not use organic solvents. It can prepare emulsions with high biosafety and high storage stability without emulsifiers, improving process safety and scalability, and broadening its application in the food, cosmetics, and biopharmaceutical fields.

The invention discloses a high-barrier degradable composite packaging material and a preparation method thereof, and relates to the technical field of packaging materials. The composite packaging material is prepared from the following components in parts by weight: 35 to 50 parts of poly (butylene adipate-co-terephthalate), 50 to 60 parts of modified polylactic acid, 6 to 12 parts of polycaprolactone, 3 to 10 parts of polyvinyl alcohol, 3 to 5 parts of polyethyleneimine, 2 to 4 parts of glycerol, 0.5 to 2 parts of antioxidant, 0.5 to 2 parts of polyethylene wax and 0.5 to 2 parts of sodium pyrophosphate. All the components of the prepared composite packaging material have a synergistic effect, so that the final product has excellent barrier property, good mechanical property and degradability, and the application requirements of environment-friendly packaging materials are met.

The invention discloses a high-adhesion damp-heat-resistant and yellowing-resistant photovoltaic adhesive and a preparation method thereof. The high-adhesion damp-heat-resistant and yellowing-resistant photovoltaic adhesive is prepared from the following raw material components in parts by weight: 40-60 parts of light-cured acrylate, 34-44 parts of a reactive diluent, 0.5-4 parts of a photoinitiator, 0.05-3.5 parts of a first polymerization inhibitor and 1-6 parts of an auxiliary agent, the structure of the light-cured acrylate is as follows: A-(B-C) x, in which A is a heterocyclic compound containing a urea bond; b is an alicyclic diisocyanate monomer; c is a hydroxyl-containing acrylic acid derivative, and x is from 1 to 5. The photovoltaic adhesive disclosed by the invention can meet the general requirements of photovoltaic adhesives, has high adhesive force, damp-heat resistance, aging resistance and yellowing resistance, and is matched with a low-temperature tin-coated welding strip, so that the welding strip and a battery piece realize dual fixation, the stripping force between the welding strip and the battery piece is greatly improved, meanwhile, traditional infrared heating welding is replaced, and the production cost is reduced for lightening and thinning the battery piece at the assembly end. And the realizability is provided by reducing the cost and the energy.

The invention discloses thermal aging-resistant EPDM (Ethylene-Propylene-Diene Monomer) dynamically-vulcanized TPV (Thermoplastic Vulcanizate) as well as a preparation method and application thereof. The preparation method comprises the following steps: feeding a master batch into a double Then feeding the COC resin into the double-screw extruder from the middle section for mixing; then carrying out homogenization; and finally, granulating to obtain the thermal aging-resistant EPDM dynamically vulcanized TPV. The master batch comprises polypropylene, EPDM, white oil, a filling agent, an auxiliary agent and a vulcanizing agent. The invention discloses a heat-aging-resistant EPDM (ethylene-propylene-diene monomer) dynamically-vulcanized TPV (thermoplastic vulcanizate) as well as a preparation method and application thereof from a material formula in combination with a preparation process, and the prepared product has excellent heat-aging resistance.

The invention relates to the field of organic pigments, and discloses a preparation method and application of nano organic pigments with different crystal forms. The preparation method comprises the following steps: 1) dissolving an organic pigment crude product in a good solvent, and adding inorganic salt for activation; 2) dropwise adding a poor solvent at a gradient rate, adding a crystal form guiding agent, and inducing formation of a crystal nucleus; wherein the alpha crystal form directing agent is magnesium stearate; the beta crystal form directing agent is dibutyl phthalate; the gamma crystal form directing agent is polyethylene glycol; the initial gradient rate is 0.5-1 mL / min, and the gradient rate is increased by 0.2-0.3 mL / min every 8-12 min; 3) ultrasonic treatment; 4) cooling, and adding a surface modifier for surface modification; according to the preparation method, the nanometer organic pigment with the target crystal form can be accurately obtained through process regulation and control, the nanometer organic pigment is uniform in particle size distribution, good in dispersity, good in heat-resistant stability and high in color and luster strength, and the nanometer organic pigment has the advantages of being good in flocculation-resistant stability and weather resistance after a coating is formed.

The invention relates to the field of rubber materials, in particular to special composite modified rubber for an automobile cover tyre and a preparation method thereof. The special composite modified rubber for the automobile cover tyre is prepared from the following raw materials in parts by mass: 50-70 parts of natural rubber, 30-40 parts of composite rubber, 3-5 parts of an amino silane coupling agent, 30-50 parts of a carbon material, 15-25 parts of modified nanoparticles, 8-14 parts of a plasticizer, 3-5 parts of an activating agent, 2-4 parts of a dispersing agent, 1-1.5 parts of an antioxidant, 1-3 parts of a vulcanizing agent and 1-2 parts of a vulcanization accelerator. The prepared composite modified rubber special for the automobile cover tire has excellent wear resistance, can also keep good aging resistance, temperature-resistant stability, water resistance, skid resistance and the like, can effectively meet the performance requirements of the existing automobile field on automobile cover tire materials, and has very excellent market prospects.

This invention relates to the field of battery separator materials technology, specifically to MXene-functionalized aramid paper-based battery separators, their preparation methods, and applications. Meta-aramid paper is prepared by wet papermaking using short-cut meta-aramid fibers and precipitated fibers. MXene nanosheets are prepared by hydrofluoric acid etching. Using the meta-aramid paper as a substrate, a functional coating is constructed on the surface of the aramid paper by loading a mixture of para-aramid nanofibers and MXene through a vacuum-assisted filtration-layer-by-layer self-assembly method. The resulting functionalized separator is obtained through protonation reduction. The separator, with its three-dimensional porous protective layer constructed from para-aramid nanofibers and MXene, combines physical barrier and chemical bonding, effectively inhibiting polysulfide shuttle. Furthermore, the highly active sites of MXene can activate inert sulfur-containing substances, improving sulfur utilization. When used in assembling lithium-sulfur batteries, the separator achieves an initial discharge capacity of 1244 mAh·g at a constant current density. ‑1 The capacity retention rate is 82% after 200 cycles.

The invention provides a low-energy-consumption heat supply method and system based on a vacuum flat plate collector, and relates to the technical field of intelligent heat supply. Heat supply environment parameters and indoor temperature are collected in a fixed point mode through a preset monitoring array, the preset monitoring array is deployed in a heat supply circulation network, and a heat demand prediction model is constructed based on the integrated learning principle; and the heat supply environment parameters and the indoor temperature are input into the heat demand prediction model, demand prediction in a future window is carried out, the predicted heat demand is obtained, heat supply parameter optimization analysis is carried out with the purpose of meeting the predicted heat demand, and optimal heat supply parameters are determined to carry out self-adaptive control on a heat collector in the future window. The technical problems of insufficient heat supply and energy waste caused by lack of effective analysis of heat collection equipment in a low-temperature environment in the prior art are solved. The technical effects that the heat supply efficiency is improved, the energy consumption is reduced, the heat supply stability is improved, and efficient heat supply management under the cold climate condition is achieved are achieved.

The invention relates to the technical field of environment-friendly plastics, and particularly discloses an environment-friendly self-repairing flame-retardant plastic and a preparation method thereof. The environment-friendly self-repairing flame-retardant plastic is prepared from the following raw materials in parts by mass: 50 to 100 parts of polypropylene, 10 to 30 parts of polylactic acid, 5 to 15 parts of poly (butylene terephthalate)-adipate, 1 to 3 parts of hydroxy cellulose, 5 to 15 parts of diatomite, 1 to 5 parts of graphene oxide, 1 to 2 parts of sodium alginate, 1 to 2 parts of calcium lactate, 0.05 to 0.45 part of glutaraldehyde, 5 to 10 parts of halogen-free flame retardant, 1 to 3 parts of antioxidant and 0.5 to 1.5 parts of heat stabilizer. The flame-retardant plastic disclosed by the invention has the advantages of easily available raw materials, good environmental protection property, capability of being degraded through compost, excellent mechanical strength and self-repairing performance, good heat-resistant stability and flame retardance, simple preparation process and good biodegradability, is suitable for large-scale popularization and application, and has good economic and environmental benefits.

The application relates to the technical field of rubber materials, and discloses fluorine rubber for high-temperature oxygen sensors and a processing technology thereof. The processing technology comprises the following steps: S1: fluorinated modified methyl vinyl silicone rubber is prepared from methyl vinyl silicone rubber and 1H, 1H, 2H, 2H-perfluorodecanethiol; S2: glycerol modified silicone rubber is prepared from methyl vinyl silicone rubber and 1-thioglycerol; the glycerol modified silicone rubber is taken, mixed uniformly in a mixed solvent of tetrahydrofuran and water, urea is added, phosphoric acid is added dropwise under heating, and the mixture is kept for reaction, the solvent is removed, and the mixture is dried to obtain phosphoric acid ester modified methyl vinyl silicone rubber; S3: the fluorine rubber after being broken, the fluorinated modified methyl vinyl silicone rubber and the phosphoric acid ester modified methyl vinyl silicone rubber are added into an open mill and mixed uniformly, a composite filler and magnesium oxide are added, mixing is carried out, a vulcanizing agent and a crosslinking aid are added, mixing is carried out uniformly, and vulcanization is carried out to obtain the fluorine rubber for high-temperature oxygen sensors.

The present application relates to the technical field of medicine, in particular to a kind of Ai Huangcao cream and its preparation method and application.The Ai Huangcao cream formula is composed of Ai Naxiang oil, egg yolk oil, radix ligustici glauci oil, white vaseline, stearic acid, glycerin monostearate, liquid paraffin, propyl gallate, Tween-80, triethanolamine, sodium dodecyl sulfate, glycerol and water.The Ai Huangcao cream prepared by the preparation method of the present application has good appearance, ductility, centrifugal stability, cold resistance and heat resistance stability.Meanwhile, through skin irritation experiment and rat burn and scald experiment, it is confirmed that the Ai Huangcao cream is safe and has no skin irritation, and has good therapeutic effect on rat grade II burn and scald model.

The preparation method of the novel explosive special for the composite metal comprises the following steps: uniformly mixing 90-95 parts of porous granular ammonium nitrate and 4-7 parts of diesel oil at normal temperature for 20 minutes to obtain a porous granular ammonium nitrate fuel oil explosive, uniformly and sufficiently stirring and mixing 2-5 parts of a stable modifier and 0.5-2.5 parts of a regulator, then adding the mixture into the porous granular ammonium nitrate fuel oil explosive, continuously stirring for 2-5 minutes at the stirring rotating speed of 150-200r / min, and cooling to room temperature to obtain the explosive special for the composite metal. Stirring is finished, and the novel explosive special for the composite metal is obtained. The porous granular ammonium nitrate fuel oil explosive is matched with the stable modifier and the regulator to serve as functional aids, the two are coordinated and synergistic, the explosion performance effect of the product is remarkable, and meanwhile the product is easy to deliquesce and excellent in heat-resistant stability effect.

The application discloses a high-temperature-resistant rubber cable and belongs to the technical field of cables.The high-temperature-resistant rubber cable comprises a core, an insulation layer and a sheath layer from inside to outside; wherein the raw material of the sheath layer comprises the following components: methyl vinyl silicone rubber, linear low-density polyethylene, a cross-linking agent, modified CeO2, an antioxidant and a lubricant.The application chemically grafts CeO2 by designing a multifunctional modifier, significantly improves the dispersity and interface bonding strength of the filler in the rubber matrix, improves the sheath tensile strength while maintaining good flexibility, and cooperatively endows the cable with excellent flame-retardant performance and high-temperature thermal stability.

The invention relates to the technical field of electrical insulating materials for power transmission lines, and discloses a low-temperature-toughness durable high-hydrophobicity epoxy resin hybrid insulating material and a preparation method thereof. Comprising 50-100 parts of an epoxy monomer, 5-50 parts of a siloxane-based epoxy monomer, 30-80 parts of a curing agent, 8-20 parts of a polysiloxane modifier, 10-30 parts of a composite filler, 1-10 parts of an acid-base accelerator, 80-160 parts of aluminum hydroxide, 80-120 parts of silicon powder and 5-25 parts of a silane coupling agent. A chemical network structure on a molecular level is designed, a siloxane epoxy monomer with excellent low-temperature mechanical toughness and high hydrophobicity is introduced, a polysiloxane chain segment is subjected to modification treatment and chemically crosslinked with a functional group of a curing agent, the problem of interfacial compatibility is solved, a composite filler capable of improving compatibility is added, and the curing agent is prepared. According to a free radical reaction mechanism, the surface of the formed insulating material is subjected to rapid fluorination treatment, and the epoxy resin-based hybrid insulating material is endowed with mechanical toughness and lasting hydrophobic performance in a low-temperature environment.

The invention relates to the technical field of surfactants, in particular to a modified starch-based surfactant as well as a preparation method and application thereof, and the preparation method comprises the following steps: step 1, mixing hydrophobic modified starch with a phosphate buffer solution to prepare 8-13wt% of a mixed solution; step 2, adding modified alpha-amylase into the mixed solution in the step 1, heating to 60-70 DEG C, oscillating for 20-30 minutes, deactivating enzyme after the reaction is finished, and concentrating to obtain a modified starch-based surfactant; the modified starch-based surface active agent is a cationic surface active agent; the mass of the modified alpha-amylase is 0.01-0.1% of the mass of the hydrophobic modified starch. The modified starch-based surfactant disclosed by the invention is suitable for the field of water treatment, not only can achieve relatively good emulsification stability, but also has a certain antibacterial effect, the preparation method of the modified starch-based surfactant is efficient, and the problems that the activity of a biological enzyme is low and the biological enzyme is unstable at a high temperature can be avoided.

The application discloses a kind of high weather-resistant paint for base station radome and preparation method thereof, belong to coating preparation technical field.The high weather-resistant paint for base station radome is composed of the following weight parts components: 22-38 parts of fluoroethylene-vinyl ether resin, 8-16 parts of hydroxy acrylic resin, 10-18 parts of titanium white, 5-10 parts of barium sulfate, 0.5-1.5 parts of nano silicon dioxide, 0.4-1.2 parts of dispersing agent, 0.2-0.6 parts of leveling agent, 0.1-0.4 parts of defoaming agent, 1-2.7 parts of composite weather-resistant agent, 0.4-1.2 parts of composite adhesion aid and 10-22 parts of solvent.The coating prepared according to the above-mentioned substances has excellent weather resistance, salt spray resistance and adhesion.

The present application relates to the technical field of polymer material processing and synthesis, and discloses a modified polyamide flame retardant plastic for automobile water chamber and its preparation method, wherein the modified polyamide flame retardant plastic comprises the following raw materials: polyamide, flame retardant, inorganic filler, reinforcing component; based on the reinforcing component, the reinforcing component comprises reinforcing fiber with a weight percentage of 90-95%, and the rest is alkali-free glass fiber; the reinforcing fiber is obtained by crushing alkali-free glass fiber cloth and sisal cloth of equal area after adhesive, and the adhesive is acetal glue dispersed with antimony oxide. The preparation method is: the remaining raw materials except inorganic filler and reinforcing component are mixed to obtain mixture B; mixture B is added from the main feed port of a twin-screw extruder, and the inorganic filler and reinforcing component are mixed and added at the side feed port, and the modified polyamide flame retardant plastic is obtained by melt extrusion granulation. The modified polyamide flame retardant plastic in the present application effectively improves the problems of poor flame retardancy and mechanical properties of polyamide.