16results about How to "Improve thermo-oxidative stability" patented technology

The invention belongs to the technical field of silicon solar cells, and particularly relates to a copper electrode material and a method for preparing a copper electrode of a silicon solar cell by using the copper electrode material, the copper electrode material comprises the following components: a copper wire, a tin-bismuth alloy and modified rosin, and the preparation method of the modified rosin comprises the following steps: firstly, taking polyethylene glycol and aniline phenylacetic acid as raw materials; carrying out esterification reaction to obtain aniline modified polyethylene glycol; then, rosin and acrylic acid are used as raw materials, and acrylic acid modified rosin is obtained through a D-A addition reaction; and finally, by taking aniline modified polyethylene glycol and acrylic acid modified rosin as raw materials, carrying out esterification reaction. The invention also provides a method for preparing a silicon solar cell copper electrode by using the copper electrode material. The surface of a copper wire is sequentially coated with a modified rosin layer, a tin-bismuth alloy layer and a modified rosin layer. The copper electrode provided by the invention has relatively low bulk resistance and relatively good oxidation stability, and also has excellent adhesive force and relatively low interface contact resistance when the copper electrode is fused and welded on the surface of a substrate.

The invention belongs to the technical field of new materials, and discloses a copper-manganese bimetallic fiber catalyst and a preparation method and application thereof.The preparation method specifically comprises the steps that copper ions and manganese ions are loaded on polymer fibers, and copper-manganese-loaded polymer fibers are obtained; s2, roasting the copper-manganese-loaded polymer fiber prepared in the step S1 in an inert gas atmosphere to obtain a copper-manganese bimetallic fiber catalytic material precursor; and S2, carrying out ozone in-situ activation treatment on the copper-manganese bimetallic fiber catalytic material precursor prepared in the step S2 by adopting ozone airflow to obtain the copper-manganese-based fiber catalyst. The prepared catalyst is high in catalytic activity, good in water vapor resistance and high in thermal oxidation stability, in addition, the selection of forms is not limited, the catalyst can be applied in any forms such as disordered fibers, woolen yarns, needle-punched fabrics and knitted fabrics, filling is convenient, and the use depth and range of catalytic materials are greatly widened.

The invention discloses a formula of a motorcycle inner tube with high temperature resistance and low VOCs (volatile organic compounds). The motorcycle inner tube comprises the following components in parts by weight: 60-90 parts of natural rubber, 64-100 parts of reclaimed rubber, 4-6 parts of zinc oxide, 1.5-2.5 parts of stearic acid, 3-5 parts of an anti-aging agent, 0.8-1.5 parts of microcrystalline wax, 3-5 parts of bonding resin, 0.8-1.5 parts of magnesium aluminum silicate, 0.8-1.5 parts of modified sepiolite, 20-32 parts of carbon black, 40-65 parts of light calcium carbonate, 7-12 parts of aromatic oil, 1.3-2.2 parts of sulfur, 3.5-6 parts of an accelerant CZ / NS and 0.5-1 part of a scorch retarder CTP. According to the motorcycle inner tube rubber material, magnesium aluminum silicate and modified sepiolite are added to achieve a synergistic effect, volatilization and release of low-boiling-point organic matter in the raw materials can be effectively adsorbed and inhibited, a rubber matrix can be reinforced, the mechanical property of the rubber matrix is improved, the effect of isolating thermal oxygen can be achieved, and the thermo-oxidative aging resistance of the rubber material is improved.

The invention discloses a polymer, a preparation method thereof, a non-stick coating, a cooking utensil and a method for preparing the cooking utensil, a main chain of the polymer comprises a silicon-oxygen bond, and two end groups of the polymer respectively comprise an active group and a low surface energy group; the low surface energy group comprises a silane group; the active groups comprise at least one of-NH2,-SH,-Cl,-Br, an epoxy group, a glycidyl group and a glycidoxy group. The polymer has a Si-O main chain, and has outstanding thermal oxidation stability, excellent moisture resistance, water resistance, rust resistance, cold resistance, corrosion resistance and the like. One end of the polymer contains silane groups, so that the coating has excellent anti-sticking performance, the other end of the polymer has active groups, and the active groups can be combined with other structures such as a bottom layer and a surface layer in a chemical bond form, so that the problem of material evaporation loss when the coating is used is avoided, and the service life of the coating is prolonged. The lasting non-stick performance of the coating is facilitated.

The invention relates to light dehydrofluorination modified PVDF (polyvinylidene fluoride) resin as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving PVDF resin to be modified in a polar solvent to obtain a PVDF solution; the method comprises the following steps: adding weak organic alkali into a PVDF solution in a protective gas atmosphere, and then carrying out dehydrofluorination modification; and after the reaction is finished, terminating the reaction by using an acidic alcohol solution, and carrying out precipitation, washing and drying to obtain the light dehydrofluorination modified PVDF resin. Compared with the prior art, the high-temperature-resistant PVDF resin with high thermal stability and good melt processability can be obtained, and the high-temperature-resistant PVDF resin can be used for 200-DEG C-grade injection molding or extrusion molding products.

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.

This invention discloses a low-smoke halogen-free flame-retardant network cable and its preparation method, comprising a conductor, an insulation layer, a foamed filler strip, an aluminum-plastic composite film wrapping layer, a non-woven fabric wrapping layer, and a halogen-free flame-retardant outer sheath layer. The halogen-free flame-retardant sheath layer is prepared from the following components: ethylene-vinyl acetate copolymer, POE, pretreated magnesium hydroxide, ammonium polyphosphate, modified lignin, attapulgite, zinc borate, maleic anhydride-grafted ethylene-vinyl acetate copolymer, antioxidant, and calcium stearate. This low-smoke halogen-free flame-retardant network cable uses an EVA / POE blend as the sheath matrix and employs a ternary composite flame-retardant system of magnesium hydroxide, ammonium polyphosphate, and modified lignin, synergistically using zinc borate and attapulgite as functional additives. Without introducing halogens, the sheath material simultaneously possesses B1-level flame-retardant performance, low-smoke and low-toxicity characteristics, and transmission performance meeting the Category 6 network cable standard. The overall solution balances the requirements of flame-retardant safety and communication functionality.

The invention relates to the technical field of thermal interface materials, in particular to a carbon fiber reinforced heat-conducting phase-change composite material which comprises a carbon fiber felt, a phase-change material, a thermoplastic elastomer, an antioxidant and spherical aluminum oxide. The carbon fiber reinforced heat-conducting phase-change composite material prepared by the method has the advantages of high heat conductivity, high tensile stress, compressibility, high reliability and the like, has no obvious pumping-out and creep problems after being used as a thermal interface material for a long time, and can be applied to the fields of high-power integrated circuit heat dissipation, servers, communication, military industry, aerospace and the like.

The invention belongs to the technical field of new materials, and discloses a copper-manganese-based fiber catalytic material and a preparation method and application thereof.The preparation method specifically comprises the steps that copper ions are loaded on polymer fibers, and copper-loaded polymer fibers are obtained; carrying out pre-oxidation treatment on the copper-loaded polymer fiber to obtain a pre-oxidized copper-loaded polymer fiber; carrying out in-situ oxidation on the pre-oxidized copper-loaded polymer fiber by adopting a potassium permanganate in-situ oxidation method to obtain a copper-manganese-based polymer fiber catalytic material precursor; and carrying out ozone in-situ activation treatment on the copper-manganese-based polymer fiber catalytic material precursor by adopting ozone airflow to obtain the copper-manganese-based fiber catalytic material. The prepared copper-manganese-based fiber catalytic material is simple in preparation process, free of high-temperature calcination, stable in oxidation resistance, high in thermal oxidation stability, good in water vapor resistance and excellent in catalytic performance, has no limitation on form selection, can be applied in any forms such as disordered fibers, woolen yarns, needle-punched fabrics and knitted fabrics, is convenient to fill, and can be applied in any other forms such as the disordered fibers, the woolen yarns, the needle-punched fabrics and the knitted fabrics. And moreover, the use depth and breadth of the catalytic material are greatly widened.

The application belongs to the technical field of battery separator, and provides a PE material for lead-acid battery separator and a preparation method thereof.The PE material comprises the following raw materials in parts by weight: 20-24 parts of high molecular weight polyethylene, 58-76 parts of modified silicon dioxide, 10-18 parts of process oil, and 0.3-1.0 parts of antioxidant; the modified silicon dioxide is obtained by modifying the surface of silicon dioxide with diethylenetriamine and modified tannic acid.The PE material prepared by the application has high wettability, good mechanical strength and chemical stability, and meets the requirements of PE separator for lead-acid battery in practical application.

The invention discloses a preparation method of washable hot-fix rhinestone sizing powder, and relates to the field of functional surface decoration sizing powder. By optimizing the composite resin system and adding the hindered phenol antioxidant, the washing resistance and bonding strength of the adhesive layer are remarkably improved. Compared with the prior art, after the rubber powder is repeatedly washed for multiple times under the washing condition of 50 DEG C, the hot fix rhinestone can still be firmly attached to the surface of a base material, and falling off, edge warping or cracks do not occur. The rubber powder is suitable for various base materials and hot-fix rhinestone types, and can keep higher stability in industrial production. The matched application process defines the parameter ranges of hot fix rhinestone pretreatment, glue powder spreading amount, pre-curing and hot pressing, and ensures the consistency and quality stability of the product in large-scale production.

This application relates to an aging-resistant cable, comprising a conductor and an insulation layer. The insulation layer comprises the following components: polyvinyl chloride (PVC), cerium dioxide, lauric acid, 4-amino-2,2,6,6-tetramethylpiperidine, benzoylacetone, oxaloyl chloride, triethylamine, anhydrous ethanol, an antioxidant, and an ultraviolet absorber. It also relates to a processing method for the aging-resistant cable. This application has the following advantages and effects: The reaction of cerium dioxide with lauric acid allows metal ions and carboxyl groups to form coordinate bonds, achieving chemical anchoring and generating hydrophobic rare earth carboxylates, improving compatibility with PVC, inhibiting nanoparticle aggregation, promoting uniform dispersion, and providing thermal and light stabilization. Furthermore, the reaction of 4-amino-2,2,6,6-tetramethylpiperidine, benzoylacetone, and oxaloyl chloride yields a free radical scavenging ability with metal chelating capacity and hindered amines, enhancing the thermal and photo-oxidative aging resistance of the PVC cable material.

The invention discloses a high-temperature-resistant hot melt adhesive and a preparation method thereof, and relates to the technical field of hot melt adhesives. The high-temperature-resistant hot melt adhesive is prepared from the following raw materials in parts by weight: 25 to 35 parts of modified polyimide resin, 20 to 30 parts of modified benzoxazine resin, 8 to 12 parts of carboxyl-terminated nitrile rubber, 5 to 8 parts of C5 / C9 copolymerized petroleum resin, 3 to 5 parts of hydrophobic modified nano silicon dioxide, 1 to 2 parts of silicone powder, 0.5 to 1.0 part of antioxidant 1010, 0.3 to 0.8 part of zinc stearate and 0.05 to 0.1 part of tetrabutylammonium bromide. The high-temperature-resistant hot melt adhesive is scientific in raw material ratio, core resin is modified to improve heat resistance and compatibility, filler such as hydrophobic nano silicon dioxide is added to enhance performance, the preparation process is controllable, nitrogen protection is achieved in the whole process, moisture absorption is prevented through granulation and drying treatment, and a finished product is excellent in high-temperature resistance, good in comprehensive performance and good in storage stability.

The invention relates to the technical field of high-pressure piston compressor oil, and in particular to an environmentally friendly high-pressure piston compressor oil and a preparation method thereof. The compressor oil comprises, by weight, 45-65 parts of trimethylolpropane stearate, 30-45 parts of alkylnaphthalene base oil, 1.5-5 parts of antioxidant, 0.1-3 parts of antiwear agent, 0.02-0.1 parts of non-ferrous metal corrosion inhibitor, 1.0-2.0 parts of oil mist inhibitor, 0.01-0.03 parts of defoamer, and 0.01-0.02 parts of demulsifier. The weight ratio of the trimethylolpropane stearate to the alkylnaphthalene base oil is (1-2.5):1. The compressor oil has the characteristics of high flash point, high autoignition temperature, good detergency, high safety, strong lubrication ability, long oil change cycle, user-friendly and environmentally friendly, and can maintain excellent high temperature performance even under high pressure conditions.

The invention discloses pentaerythritol tetra (6-naphthyl hexanoic acid) ester and a preparation method and application thereof, the preparation method adopts two-step reaction of alkylation and esterification, the first step is that naphthalene and 5-hexenoic acid are subjected to alkylation reaction to generate 6-(1-naphthyl) hexanoic acid; and 2, carrying out a reaction on the 6-(1-naphthyl) hexanoic acid and thionyl chloride, and carrying out an esterification reaction with pentaerythritol to finally obtain the oily pentaerythritol tetra (6-naphthyl hexanoic acid) ester. The prepared pentaerythritol tetra (6-naphthyl hexanoate) ester has a structure with a symmetric four-arm core, a flexible alkyl chain and a rigid naphthalene end group, is shown as a formula (I), is used for lubrication and sealing of various equipment, and has the advantages of oxidation resistance, high and low temperature resistance, extreme pressure resistance, good lubrication and sealing performance and the like.

The invention discloses polyester filament yarn POY spinning oil containing low-acid-value and high-flash-point alkyl-terminated polyether and a preparation method of the polyester filament yarn POY spinning oil, and relates to the technical field of spinning. According to the technical scheme, the anti-static agent comprises the following components in percentage by mass: 50-70% of polyether, 20-40% of an emulsifier, 1-3% of an anti-static agent, 5-21% of a bundling agent and 4-15% of an additive, wherein the acid value of the polyether is less than 0.03 mgKOH / g, and the flash point is more than 245 DEG C. Compared with the traditional end-capped polyether spinning oil, the polyester filament yarn POY spinning oil prepared by the invention has the advantages of good thermal oxidation stability, less fuming amount and difficulty in coking.