26results about How to "Improve heat stability" patented technology

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 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.

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 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 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 application discloses a Pichia pastoris fermentation lysate filtrate, a preparation method thereof and an acne-removing composition, and belongs to the technical field of polypeptides. The preparation method disclosed by the application takes a phytolaccin as a template, obtains a 40-peptide mutant with enhanced stability through site-directed mutagenesis, and clones the gene of the 40-peptide mutant into a pPIC9K plasmid; the recombined plasmid is electroporated into a Pichia pastoris GS115 strain to obtain an engineering strain capable of efficiently expressing the 40-peptide; finally, the engineering strain is subjected to segmented fermentation and purification treatment to obtain the Pichia pastoris fermentation lysate filtrate. The 40-peptide content in the obtained filtrate is as high as 88 mu g / mL-104 mu g / mL, the inhibition rate of the filtrate on Propionibacterium acnes is higher than 99.5%, the filtrate can reduce the intracellular ROS content induced by H2O2 and the TNF-alpha and IL-6 inflammatory factor levels triggered by LPS, human body tests prove that the filtrate has obvious oil control, acne-removing and soothing effects, the problems of fuzzy effect and poor stability of natural yeast fermentation products are solved, and the filtrate can be applied to acne-removing skin care products as a core raw material.

The invention discloses a special high-heat-resistance PET composite decorative film for household appliances and a preparation process of the special high-heat-resistance PET composite decorative film. The special high-heat-resistance PET composite decorative film sequentially comprises a wear-resistant and stain-resistant surface layer, a high-heat-resistance decorative printing layer, a high-temperature-resistant bonding layer, an enhanced PET base material layer, a heat-resistant buffer layer, a high-viscosity and high-temperature-resistant gum layer and a release film layer from top to bottom, the high-temperature-resistant material is adopted, the reinforced PET base material is subjected to blending modification through PET and PBT, and the glass fiber reinforcing agent and the like are added, so that the heat-resistant stability is improved; the high-heat-resistant decorative printing layer is made of polyurethane resin and heat-resistant pigment, so that high-temperature fading is prevented; the high-temperature-resistant bonding layer and the like adopt high-temperature-resistant resin and a cross-linking system, so that the composite film can stably bear the high temperature of 150 DEG C or above.

This application belongs to the technical field of high-temperature resistant foam materials, and specifically relates to a high-temperature resistant polymethacrylamide (PMI) foam material, its preparation method, and its applications. Addressing the deficiency of existing PMI foam materials where mechanical properties rapidly degrade at high temperatures, this application introduces maleimide monomers into the PMI foam material to improve the rigidity of the molecular chain segments. Then, through a crosslinking reaction between carboxyl groups and polyisocyanates, a high-temperature resistant PMI foam material is obtained. The PMI foam material exhibits excellent mechanical strength and a low rate of mechanical property degradation at high temperatures, enabling it to withstand loads and maintain structural dimensional stability under high-temperature conditions, making it suitable for use as a structural core material in the aerospace field.

The present application provides a separator for a secondary battery and a preparation method thereof, as well as a secondary battery and an electrical apparatus including the separator. The separator of the present application includes a porous substrate and a coating disposed on at least one surface of the porous substrate. The coating includes nanocellulose, the nanocellulose includes modifying groups, and the modifying groups include at least one of sulfonic acid groups, boric acid groups, and phosphoric acid groups.

Disclosed is a resin composition for power cable insulation, which is a recyclable resin composition for power cable insulation, and has excellent heat resistance and voltage stability. The present invention provides a polypropylene resin composition for power cable insulation, comprising: 60-90 parts by weight of a propylene block copolymer having ethylene-propylene rubber (EPR) dispersed in a propylene-ethylene random copolymer; 10-40 parts by weight of a polyolefin elastomer (POE); 100-1,000 ppm of an inorganic nanocomposite based on the total weight of the composition; and 500-5,000 ppm of a HALS (Hindered Amine Light Stabilizer) stabilizer based on the total weight of the composition.

The present application proposes a boiler feed water safety protection method and system based on PID and electrode water level double-mode control, the method comprising: obtaining the state changes of high water level, normal water level and low water level electrodes, recording the water level events containing electrode number, triggering time and change direction to form a sequence; generating an abnormal evolution state according to the electrode number, triggering time and change direction of each event in the observation section in the sequence; generating a recovery demand state according to the abnormal evolution state; comparing the recovery demand state with the PID feed water output state to generate a protection decision state and executing a protection action. The present application breaks the decision layer of PID regulation and electrode protection, effectively distinguishes short-time disturbance and continuous water loss working conditions, reduces false shutdown, and improves the continuity and safety of boiler operation.

The invention relates to the technical field of heat supply, in particular to a steam heat supply pipe network pressurization system and an operation method thereof.The pressurization system comprises a renewable energy power supply module, a compression transmission module and a control module; the compression transmission module comprises a steam input pipeline, a first branch, a second branch, a motor, a steam compressor, a first ejector, a steam output pipeline and a steam energy accumulator; the motor is respectively connected with the renewable energy power supply module and the mains supply; the control module comprises a control system, a control valve, a thermometer and a pressure gauge; the operation method comprises the steps that the steam energy accumulator is charged, and the steam energy accumulator releases steam. After the technical scheme is adopted, by arranging the renewable energy source power supply module, the compression transmission module and the control module, renewable energy sources can be cooperatively utilized for power supply, so that the occupied space of the steam energy accumulator is relatively small, and the heat supply stability is relatively high.

The application discloses a low-hairiness linen-imitating style clothing fabric and a preparation method thereof, and relates to the technical field of clothing fabrics. The clothing fabric is formed by interweaving first warp yarn, second warp yarn, first weft yarn and second weft yarn. The first warp yarn and the first weft yarn are core-spun yarns, the core-spun yarns comprise a core layer and a cladding layer, the core layer is spandex filament, and the cladding layer is a blend of polyester fiber and viscose fiber. The second warp yarn and the second weft yarn are two single yarns that are subjected to oiling treatment and twisted into a strand. The oiling treatment is performed by using modified oil agent. The clothing fabric prepared by the innovative double-yarn structure design and the modified oil agent technology has the natural texture of linen fabric and the delicate appearance of modern textile, the production process is stable, the rate of superior products is significantly improved, the double requirements of quality and functionality of linen-imitating fabric are met, and the clothing fabric has important industrial application value and market prospect.

The application discloses an application of a beta-cyclodextrin polymer and a grey water scale inhibition dispersant compound, and the compound comprises the following components and has the following weight ratio in terms of solid content: 50-90% of the beta-cyclodextrin polymer, 0-50% of hydrolyzed polymaleic anhydride, 0-50% of polyepoxysuccinic acid sodium and 0-50% of polyaspartic acid. The application is used for coal gasification grey water scale inhibition dispersant, and the mechanism is that the beta-cyclodextrin polymer performs grey water scale inhibition through inclusion, chelation and lattice inhibition of metal ions. The grey water scale inhibition dispersant compound of the application contains the beta-cyclodextrin polymer, and the beta-cyclodextrin polymer is used in combination with the hydrolyzed polymaleic anhydride, the polyepoxysuccinic acid sodium or the polyaspartic acid. Since the combined materials are all amphiphilic molecules with hydrophilic parts and hydrophobic parts, a variety of supramolecular aggregation systems, namely a self-assembly system of the "supramolecular cyclodextrin amphiphilic molecule", are formed, and the beta-cyclodextrin polymer can better play the scale inhibition role.

This utility model discloses an integrated CO2 heat pump system for fresh air supply, comprising a housing with a fresh air inlet and a fresh air outlet; a primary and secondary efficiency filter, a first heat exchanger, and a second heat exchanger are sequentially installed inside the housing along the fresh air flow direction; the heat pump system using carbon dioxide as refrigerant includes a compressor, a four-way valve, an expansion valve, and a closed refrigerant circuit, the circuit being connected through the four-way valve port so that the compressor exhaust passes sequentially through the first heat exchanger, the expansion valve, and the second heat exchanger before returning to the compressor; a variable frequency fan is installed between the second heat exchanger and the fresh air outlet; temperature and humidity sensors are respectively installed on the outdoor and indoor sides; the controller connects the sensors, the four-way valve, the compressor, and the fan, and has the advantages of dynamically switching between cooling / heating / dehumidification modes and adjusting the fan speed according to environmental parameters.

The application relates to the technical field of fireproof flame-retardant materials, in particular to a self-extinguishing material, a preparation method and application. The self-extinguishing material is prepared by the preparation method. The preparation method comprises the following steps: preparing a fire extinguishing slurry; uniformly coating the fire extinguishing slurry on a porous flame-retardant foam material to obtain a fire extinguishing functional layer; wrapping a flame-retardant packaging layer, an elastic buffer layer and a corrosion and moisture prevention layer from inside to outside on the outer side of the fire extinguishing functional layer to obtain the self-extinguishing material. The application comprises the application of the self-extinguishing material in building fire prevention, new energy battery thermal runaway protection, electrical equipment fire prevention and / or closed space fire extinguishing. The self-extinguishing material prepared by the application can capture and consume combustion free radicals, and the self-extinguishing function is realized.

This application relates to the field of adhesive technology, specifically to a one-component thermosetting addition-curing silicone adhesive for chip packaging and its preparation method. The one-component thermosetting addition-curing silicone adhesive for chip packaging comprises the following raw material components in parts by weight: 40-60 parts electronic-grade vinyl silicone oil, 5-15 parts vinyl MQ silicone resin, 1-3 parts colorant, 8-12 parts special-structure vinyl silicone oil, 3-8 parts end-side hydrogen-containing silicone oil, 0.1-0.15 parts platinum catalyst, 0.01-0.1 parts inhibitor, 1-3 parts self-made tackifier, and 35-75 parts composite filler; the composite filler includes graphene-coated alumina, silica, and carboxyl-functionalized boron nitride. The one-component thermosetting addition-curing silicone adhesive for chip packaging in this application improves upon the existing problems of low shear strength and poor thermal stability, resulting in a one-component thermosetting addition-curing silicone adhesive that balances shear strength, thermal stability, and long-term storage performance.

The application discloses a glass fiber reinforced polypropylene material, a preparation method and application, and belongs to the technical field of polypropylene engineering plastics. The material contains, in terms of weight parts, 40-70 parts of polypropylene resin, 20-50 parts of alkali-free continuous long glass fiber, and compounded antioxidants, compatibilizers, scratch-resistant agents, heat-resistant agents and light stabilizers. The alkali-free continuous long glass fiber has a diameter of 10-14 microns, a breaking strength of greater than or equal to 3000 MPa, and a linear density of 2400 tex or 3600 tex. The material has high strength, aging resistance and low-temperature impact resistance, and is suitable for automobile structural parts.

This invention relates to the field of polymer composite materials technology, and discloses a modified chlorinated polyvinyl chloride (PVC) composition and its preparation method. The PVC resin, methyl tin heat stabilizer, epoxidized soybean oil, and antioxidant are mixed, followed by the addition of a borate and phosphate composite intercalated magnesium zinc aluminum layered double hydroxide-coated nano-titanium dioxide composite heat-stabilized flame-retardant compound, a zinc hydroxystannate and zinc molybdate in-situ anchored boehmite and hexagonal boron nitride layered composite smoke-suppressing and heat-resistant compound, rutile titanium dioxide, nano-calcium carbonate, zinc borate, impact-resistant resin, and lubricating components. The mixture is then subjected to mixing, melt plasticizing, compounding, degassing, extrusion, and granulation to obtain the final composition. The resulting composition exhibits good thermal stability, flame retardancy, smoke suppression, impact resistance, and processing stability.

The invention relates to the technical field of bio-based high polymer material modification and adhesive preparation, and discloses an environment-friendly flat adhesive for wooden furniture and a preparation method of the environment-friendly flat adhesive. The flat adhesive is prepared from the following raw materials in parts by weight: 50 to 60 parts of starch, 1.5 to 2.5 parts of succinic anhydride, 1 to 1.5 parts of octenyl succinic anhydride, 15 to 20 parts of maleic anhydride grafted polylactic acid, 3 to 8 parts of modified lignin, 10 to 15 parts of isosorbide, 3 to 6 parts of bio-based wax and 0.2 to 20.7 parts of auxiliaries. The starch is endowed with excellent comprehensive performance through double modification of succinic anhydride and octenyl succinic anhydride. Succinic anhydride introduces polar carboxyl through efficient ring-opening reaction, so that the chemical bonding force between an adhesive layer and wood fibers is remarkably enhanced, and the peel strength is greatly improved; and a long-chain hydrophobic structure of octenyl succinic anhydride improves the compatibility and processing fluidity of starch and a polymer, and further macroscopically strengthens the water resistance of an adhesive layer, so that the finished product meets the performance requirements of the wood furniture flat adhesive on the premise of maintaining the environment-friendly advantages of full bio-based, zero odor and zero residue.

This invention relates to the field of hot melt adhesive technology and discloses a thermally stable, high-adhesion EVA hot melt adhesive and its preparation method. This EVA hot melt adhesive is formed by heating and mixing ethylene-vinyl acetate copolymer as a base material and serpentine-modified filler as an additive. The serpentine-modified filler is obtained by modifying the surface of serpentine with a macromolecular substance having an alternating linkage structure. This macromolecular substance can interact with a compatibilizer during the heating and melting process, thus improving the interfacial compatibility between serpentine and ethylene-vinyl acetate copolymer, thereby improving the heat resistance stability of the hot melt adhesive. Furthermore, the macromolecular substance contains a rigid cyclic structure, ether bonds, and hydroxyl groups, which not only improve the adhesive properties of the hot melt adhesive but also further enhance its heat resistance stability.

The invention provides a high-temperature wire guide tube of a three-dimensional knitting warp knitting machine and a preparation technology, and relates to the technical field of three-dimensional knitting, the high-temperature wire guide tube of the three-dimensional knitting warp knitting machine comprises a wire guide tube body, and the wire guide tube body comprises a lining layer, a three-dimensional knitting reinforcing layer and an outer protective layer which are sequentially arranged from inside to outside; the inner wall of the lining layer is provided with a friction-resistant temperature-resistant material layer, the outer surface of the lining layer is coated with the three-dimensional woven reinforcing layer in a woven mode, the lining layer and the three-dimensional woven reinforcing layer are combined through a chemical vapor deposition process, the outer protective layer comprises a high-temperature resin matrix, and the outer protective layer and the three-dimensional woven reinforcing layer are combined through an autoclave co-curing process. According to the invention, the friction-resistant and temperature-resistant material layer is arranged, so that the high-temperature resistance of the guide wire tube body can be improved, the three-dimensional woven reinforcing layer provides rigid support for the whole structure and avoids deformation or cracking of the guide wire tube, and the outer protective layer and the three-dimensional woven reinforcing layer are combined to improve the heat-resistant stability and ensure the accurate size of a guide wire channel; and the service life of the warp knitting machine high-temperature yarn guide tube is prolonged.

The application provides a high magnetic permeability soft composite material for an inductor and a preparation method thereof, and belongs to the field of high polymer material preparation. The material is composed of linear polyphenylene sulfide resin, thermotropic liquid crystal polymer, soft magnetic alloy powder with specific bimodal particle size distribution, acrylic ester nano elastic particles with specific cross-linking structure, organic silicone powder and polyhydric alcohol ester. During preparation, the resin and other components are introduced into melting from a first feeding area, the preheated magnetic powder is introduced from a downstream second feeding area, local reverse temperature difference is controlled, and exhaust mixing extrusion is carried out. The application significantly eliminates the processing yield stress under high load filling of the magnetic powder, greatly reduces the processing torque, prevents the resin from condensing and caking, and the thermal decomposition temperature of the material is higher than 300 DEG C, so that excellent processing fluidity and heat resistance and stability are achieved.

The invention provides a polyimide material, a colored polyamide acid precursor composition thereof and application of the polyimide material in preparation of a copolymerization type phthalocyanine colored polyimide film. The polyimide is formed by copolymerization of hexafluorodianhydride and biphenyl tetracarboxylic dianhydride according to a specific proportion. The corresponding polyamide acid precursor composition can be dissolved in a conventional polar aprotic solvent, and has excellent solution stability and film-forming property. After thermal imidization treatment, the obtained film shows high transparency, low chromaticity deviation and uniform and controllable light-color appearance while keeping 5% thermal weight loss temperature higher than 500 DEG C, and meets the application requirements of colorless or light-color high-performance polyimide. According to the material, the problem of serious yellowing caused by charge transfer in strong molecules of traditional aromatic polyimide is remarkably solved, processing convenience and thermal mechanical performance are both considered, and the material is particularly suitable for the high-end technical fields of flexible OLED display substrates, optoelectronic device packaging, transparent high-temperature-resistant coatings and the like.

This invention relates to an optical film, its preparation method, and its application. The optical film comprises a polyester matrix resin and a cyclic olefin copolymer dispersed in the polyester matrix resin in particulate form, and satisfies at least the following conditions: (1) the particle size distribution coefficient is less than or equal to 0.25; (2) the particles separate from the polyester matrix resin interface to form a microporous structure, and the ratio of the pore size of the microporous structure to the particle size is 0.7~1.3; (3) the glass transition temperature of the cyclic olefin copolymer is T. g,COC The glass transition temperature of the polyester matrix resin is T. g,Polyester And T g,COC -T g,Polyester ≥40℃. The optical film of this invention has excellent reflectivity and heat resistance.