1280 results about "Tert butyl" patented technology

The invention relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention belongs to the technical field of insulator materials, and particularly relates to an insulating busbar and a preparation method thereof. The preparation method of the insulating busbar comprises the following steps: coating glue on the surface of a busbar base material, and drying to obtain a busbar with a bonding layer; the preparation method comprises the following steps: mixing 40 to 60 parts of silicon resin, 20 to 40 parts of grafted silicon dioxide, 10 to 20 parts of aluminum oxide and 2 to 4 parts of 2, 5-dimethyl-2, 5-bis-(tert-butylperoxy) hexane, so as to obtain a sizing material; placing the busbar with the bonding layer in a mold, then adding a sizing material, and pressing to obtain an insulating busbar; the preparation method of the grafted silicon dioxide comprises the following steps: stirring m-aminobenzoic acid and 3-aminopropyltriethoxysilane for reaction to obtain a grafting solution, and adding silicon dioxide into the grafting solution for grafting reaction to obtain the grafted silicon dioxide.

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention discloses a preparation method and application of a photo-thermal dual-response membrane material, and relates to the field of membrane materials. When the photo-thermal double-response membrane material is prepared, a photo-thermal material firstly reacts with 4-(triethoxysilyl) aniline and then reacts with 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde and p-phenylenediamine, and a modified photo-thermal material is prepared; the preparation method comprises the following steps: sequentially reacting benzaldehyde with 2-hydroxyacetophenone and 3-N, N-dimethylamino methacryloyl chloride to prepare a photo-initiation monomer; the preparation method comprises the following steps: mixing N-isopropylacrylamide, a photo-initiation monomer, N, N '-methylene bisacrylamide and a modified photo-thermal material, combining with a hydrophobic substrate membrane, preparing a membrane, and finishing the surface by using 2-bromo-1-[3, 5-di (tert-butyl)-4-hydroxyphenyl] ethanone, thereby obtaining the photo-thermal dual-response membrane material. The photo-thermal dual-response membrane material prepared by the invention has the characteristics of pollution resistance, easiness in cleaning, durability, antibacterial property, metal ion recovery and low energy consumption.

The invention relates to an insulating material, in particular to a voltage-breakdown-resistant high-insulation EPDM material and application thereof, and the voltage-breakdown-resistant high-insulation EPDM material comprises the following components: modified silicone rubber, 4, 4 '-thiobis (6-tert-butyl o-cresol), a composite filler, a cross-linking agent, 4-isopropoxybenzoic acid and an EPDM matrix; according to the voltage-breakdown-resistant high-insulation EPDM material disclosed by the invention, the comprehensive performance of the material is greatly improved and the application field of the EPDM material is widened through the matching of all the components and the specific dosage ratio of the components. The modified silicone rubber is introduced, the modified silicone rubber is obtained by modifying vinyl-containing perfluoropolyether-b-polysiloxane, in the vinyl-containing perfluoropolyether-b-polysiloxane, a perfluoropolyether chain segment has extremely low surface energy and good chemical stability, and a polysiloxane chain segment endows the vinyl-containing perfluoropolyether-b-polysiloxane with excellent flexibility and electrical insulating property.

The invention relates to the field of polyester fibers, and discloses a composite enhanced polyester fiber for bags and suitcases and a preparation method thereof.The composite enhanced polyester fiber is prepared from polyethylene glycol terephthalate slices, polyethylene glycol, tris (2, 4-di-tert-butylbenzene) phosphite, tetra [beta-(3, 4-ditert-butylbenzene)] tetrakis [beta]-(2, 4-ditert-butylbenzene)] tetrakis [beta-(3, 4-ditert The composite material is prepared from 1, 3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, modified nano-zinc oxide, tetrabutyl titanate, a chitosan aqueous solution and acetic acid. The modified nano zinc oxide is prepared from gamma-aminopropyltriethoxysilane, an ethanol water solution, acetic acid and nano zinc oxide. The composite enhanced polyester fiber disclosed by the invention has relatively good antibacterial property, hygroscopicity and mechanical property.

The invention relates to the field of cables, and discloses a fire-resistant light cable for a safety harbor-returning system for a ship and a processing method thereof.The cable comprises a guide core, a fire-resistant layer, an insulating layer, a cabling layer, an inner sheath layer, an armor layer and an outer sheath layer which are sequentially arranged from inside to outside, and the inner sheath layer and the outer sheath layer are prepared by extruding sheath layer materials; the sheath layer is made of low-density polyethylene, nitrile rubber, ethylene-tetrafluoroethylene copolymer, functional additives, composite filler and auxiliaries; the functional additive is prepared by the following steps: reacting 3, 5-di-tert-butyl-4-hydroxybenzoyl chloride with 2-chloro-4, 6-diamino-1, 3, 5-triazine to obtain a modified hindered phenol component, and then reacting 1, 4-p-xylylene dichloride with 10-(2, 5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide to obtain a product, and continuously reacting the product with the modified hindered phenol component; the composite filler is prepared by modifying vermiculite with titanium dioxide and zinc oxide pillared. The cable prepared by the invention has excellent mechanical properties, flame retardance and aging resistance.

The invention belongs to the technical field of crosslinked polyethylene, and particularly relates to crosslinked polyethylene for a high-voltage cable and a preparation method of the crosslinked polyethylene. The cross-linked polyethylene for the high-voltage cable is prepared from the following raw materials in parts by weight: 100 parts of low-density polyethylene, 3.5 to 4.5 parts of nano filler master batch, 0.30 to 0.35 part of tetra [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, 0.7 to 0.8 part of 2, 2, 6, 6-tetramethylpiperidine oxide, 0.7 to 0.8 part of 4-allyloxy-2-hydroxybenzophenone, 0.7 to 0.8 part of 2, 5-dimethyl-2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 1.0 to 1.2 parts of 2, 5-di-tert-butylperoxy-3-hexyne; and 0.8 to 1.0 part of tert-butyl peroxyisononanoate. The crosslinked polyethylene for the high-voltage cable has excellent tensile strength and breakdown strength.

A skin care active substance and a skin care product. The skin care active substance comprises, in parts by weight, 0.1-15 parts of a moisturizing agent and 0.1-12 parts of a soothing agent, wherein the moisturizing agent comprises at least one of four-molecular-weight hyaluronic acid and D-panthenol, and the soothing agent comprises at least one of a Portulaca oleracea extract, dipotassium glycyrrhizinate, a Piper methysticum extract, and trans-4-tert-butylcyclohexanol. By designing the components and the ratio thereof, the synergistically formed active substance can mildly and effectively provide moisturizing, soothing, and repairing effects, thereby effectively protecting the skin barrier, maintaining skin health, and demonstrating high safety.

The present invention therefore relates to aqueous polymer latices of copolymers obtainable by aqueous emulsion polymerisation of ethylenically unsaturated monomers M, which comprise i. 5 to 90% by weight, in particular 10 to 70% by weight, especially 10 to 50% by weight, based on the total amount of monomers M, of a monomer M1, which is 1-hexyl acrylate; ii. 0 to 70% by weight, based on the total amount of monomers M, of at least one monomer M2, which is selected from C2-C5-alkyl esters of acrylic acid, except for tert-butyl acrylate, C7-C20-alkyl esters of acrylic acid and C5-C20-alkyl esters of methacrylic acid and mixtures thereof; iii. 5 to 70% by weight, based on the total amount of monomers M, of at least one monomer M3, which is selected from tert-butyl acrylate, C1-C4-alkyl esters of methacrylic acid, C5-C20-cycloalkyl esters of acrylic acid, C5-C20-cycloalkyl esters of methacrylic acid, C5-C20-cycloalkylmethyl esters of acrylic acid, C5-C20-cycloalkylmethyl esters of methacrylic acid, where cycloalkyl in the aforementioned monomers is mono-, bi- or tricyclic and where 1 or 2 nonadjacent CH2 moieties of cycloalkyl may be replaced by oxygen atoms and where cycloalkyl may be unsubstituted or carry 1, 2, 3 or 4 methyl groups, and monovinyl aromatic monomers, methylene-gamma-butyrolactone and mixtures thereof; where the total amount of monomers M1 and M2 is in the range from 10 to 90% by weight, based on the total amount of ethylenically unsaturated monomers M, and where the total amount of monomers M1, M2 and M3 is at least 90% by weight, based on the total amount of ethylenically unsaturated monomers M. The present invention also relates to a process for producing the aqueous polymer latices of the present invention. The present invention also relates to the use of these polymer latices as binders in waterborne coating compositions and waterborne adhesive compositions, in particular as binders in waterborne coating compositions.

The invention relates to the technical field of building materials, in particular to a high-elasticity polyurethane-asphalt composite road crack repair material and a preparation method thereof, and the high-elasticity polyurethane-asphalt composite road crack repair material comprises the following raw materials: an asphalt-based material, functional modified polyurethane, a polyether-polyolefin block copolymer, functional rubber, 2, 6-di-tert-butyl-4-methylphenol and sodium polyacrylate. According to the invention, a lipophilic functional group is introduced into a molecular chain of the functionalized modified polyurethane, so that the functionalized modified polyurethane can interact with alkyl in asphalt to form a more stable synergistic network structure, and the phase separation phenomenon of the polyurethane and the asphalt is effectively reduced; the modified polyurethane not only improves the elasticity, flexibility, temperature resistance and crack resistance of the composite material, but also optimizes the processability of the material, enhances the interface bonding force, and further improves the repair effect and the road durability.

The invention provides a flexible switching production method and equipment for low cis-polybutadiene rubber (LCBR), solution polymerized styrene-butadiene rubber (SSBR) and hydroxyl-terminated liquid polybutadiene rubber (HTPB), the flexible switching production equipment comprises an initiator production device and a polymerization unit, and the flexible switching production method comprises the following steps: mixing cyclohexane and n-hexane according to a volume ratio of 6.5: 3.5-7: 3, adding an initiator, and stirring to obtain a mixture; forming a mixed solvent; the method comprises the following steps: adding a monomer, an active agent, an initiator and a mixed solvent into a polymerization kettle 31 of a polymerization unit, and carrying out polymerization reaction to obtain a low-cis-polybutadiene, solution polymerized styrene-butadiene or hydroxyl-terminated liquid polybutadiene rubber solution; a novel protection initiator tert-butyl dimethyl siloxy propyl sodium is designed, and hydroxyl-terminated liquid polybutadiene rubber with a controllable structure is prepared through anionic living polymerization. According to the process, shutdown for kettle cleaning is not needed, the low cis-polybutadiene, the solution polymerized styrene-butadiene and the hydroxyl-terminated liquid polybutadiene rubber can be produced on the same polymerization device in a flexible switching manner, and the overall production efficiency is improved.

The invention relates to the technical field of high polymer materials, in particular to an EVA / nano-zinc oxide anti-ultraviolet car cover and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and the ultraviolet resistance of the existing car cover are difficult to consider at the same time. Ethylene-vinyl acetate resin is used as a matrix, a silane coupling agent and hydroxyethyl methylacrylate surface modified and grafted composite nano-zinc oxide, maleic anhydride grafted EVA and a polyurethane modifier are subjected to melt blending, a TMPTA cross-linking agent is added, and the vehicle cover film is prepared through extrusion casting and ultraviolet curing. Wherein the polyurethane modifier is obtained by reacting polycaprolactone polyol with isophorone diisocyanate and adopting hydroxyethyl methylacrylate and 2, 2 '-methylenebis (6-tert-butyl-4-methylphenol) for end capping. The uvioresistant car cover prepared by the invention has excellent tensile strength, elongation at break, uvioresistant performance and adhesive force at the same time.

The invention relates to the field of cables, and discloses a flame-retardant impact-resistant cable and a preparation process thereof.The cable sheath layer is prepared from low-density polyethylene, nitrile rubber, ethylene-vinyl acetate copolymer, modified halloysite nanotubes and a flame-retardant additive, the preparation method comprises the following steps: carrying out acylating chlorination on 2, 4-dihydroxyphenyl)-2H-benzotriazole, reacting with 3, 5-di-tert-butyl-4-hydroxybenzylamine to prepare a modified acylating chlorination ultraviolet absorbent, and grafting the modified acylating chlorination ultraviolet absorbent with aminated halloysite nanotubes to prepare the ultraviolet absorbent. The aminated halloysite nanotube is prepared by using gamma-aminopropyl triethoxy silane to modify the aminated halloysite nanotube; the flame-retardant additive is prepared from a flame-retardant intermediate obtained by reaction of diphenyl silanediol and phosphorus oxychloride and phosphonitrilic chloride trimer through a precipitation polymerization method. The added modified halloysite nanotube and flame-retardant additive can endow the cable with excellent mechanical properties, aging resistance, flame retardance and heat resistance.

The invention relates to the field of electric wires and cables, and discloses a high-temperature-oxidation-resistant flame-retardant electric wire and cable and a preparation method thereof.The sheath layer of the electric wire and cable comprises low-density polyethylene, nitrile rubber, natural rubber, ethylene-tetrafluoroethylene copolymer, modified multi-walled carbon nanotubes, modified nano titanium dioxide and auxiliaries; the modified multi-walled carbon nanotube is prepared by reacting an acylating chlorination multi-walled carbon nanotube with a polycyclotriphosphazene derivative; the polycyclotriphosphazene derivative is prepared by reacting hexachlorocyclotriphosphazene with p-aminodiphenylamine and then taking diphenyl dihydroxysilane as a linker; the modified nano titanium dioxide is prepared by the following steps: substituting phenylphosphoryl dichloride with phloroglucinol, then sequentially substituting with 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 3-aminopropyltriethoxysilane, and grafting an obtained antioxidant phosphorus-containing coupling agent with nano titanium dioxide. The sheath layer material prepared by the invention has excellent high-temperature oxidation resistance, flame retardance, wear resistance and heat resistance.

The invention belongs to the technical field of rubber sealing rings, and particularly discloses a wading rubber sealing ring and a preparation method thereof, the wading rubber sealing ring comprises the following components by weight: 60-70 parts of modified ethylene propylene diene monomer, 35-50 parts of modified white carbon black, 20-30 parts of hydrogenated nitrile rubber, 0-10 parts of fluororubber, 2-5 parts of polyester fiber, 0.5-3 parts of an anti-hydrolysis agent, and 1-3 parts of a hydrophobic agent. 2-4 parts of an antimicrobial agent, 3-5 parts of an anti-aging agent and 1-7 parts of sulfur; the anti-hydrolysis agent is a mixture of tetrakis [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester and a carbodiimide anti-hydrolysis agent; the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane, and the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane. The wading rubber sealing rubber ring and the preparation method thereof are suitable for fresh water and warm water scenes, and have wide application prospects in ship sealing and sewage treatment equipment in seawater and industrial wastewater scenes.

The invention discloses self-repairing waterborne polyurethane based on double dynamic bond synergy and a preparation method thereof.The method comprises the following steps that 1, in the nitrogen atmosphere, after isophorone diisocyanate, polytetrahydrofuran diol and dimethylolpropionic acid react for a period of time, a catalyst is added for continuous reaction, and a prepolymer is synthesized; (2) adding N, N-di-tert-butyl ethylenediamine into the prepolymer, and carrying out chain extension reaction; (3) adding dithiothreitol into the solution after the reaction in the step (2) to carry out cross-linking reaction; and (4) adding triethylamine into the solution obtained after the reaction in the step (3), and carrying out a salt forming reaction to obtain the self-repairing waterborne polyurethane emulsion based on double dynamic bond synergy. High self-healing efficiency and mechanical performance are achieved by introducing dynamic covalent bonds with double thermal responses, and reprocessing and recycling are achieved at the same time.

The utility model relates to an energy-saving production device for preparing methyl tert-butyl ether by an isobutane dehydrogenation method. A raw material gasifier is arranged between the catalytic distillation tower feeding and discharging heat exchanger and the catalytic distillation tower, a temperature sensor is arranged on a feeding pipeline from the raw material gasifier to the catalytic distillation tower, a gas phase at the top of the catalytic distillation tower is divided into two pipelines, a compressor is additionally arranged on one pipeline, and an automatic flow regulating valve is additionally arranged on the other pipeline; a cold-side material outlet of the distillation tower feeding and discharging heat exchanger is connected with a cold-side material inlet of the raw material gasifier, a cold-side material outlet of the raw material gasifier is connected with a feeding hole in the middle lower part of the catalytic distillation tower, and a tower top discharging pipeline of the catalytic distillation tower is respectively connected with an inlet of the compressor and a hot-side material inlet of the condenser; an outlet pipeline of the compressor is connected with a hot measuring material inlet of the raw material gasifier, and a hot measuring material outlet of the raw material gasifier is connected with a liquid inlet of the return tank. According to the utility model, a heat pump technology is adopted, so that the heating power of the tower kettle reboiler is reduced, and the steam consumption is reduced; and the method is more economical.

The present invention relates to a crosslinkable polyethylene composition comprising an additive composition consisting of a mixture of polyethylene glycol and a mixture of 4, 4 '-thiobis (2-tert-butyl-5-methylphenol) plus thio-diethylene bis [3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate], and a method for producing the crosslinkable polyethylene composition.

The invention discloses a special gradient flame-retardant explosion suppressant for a high-energy-density ternary lithium battery, and relates to the technical field of safety protection of new energy batteries, the gradient flame-retardant explosion suppressant comprises the following components by mass: 30% of trimethyl phosphate, 16% of dimethyl methylphosphonate, 13% of triphenyl phosphate, 32% of a solvent, and 9% of a composite stabilizer; the compound stabilizer is prepared from 2, 6-di-tert-butyl-4-methylphenol, diisooctyl adipate and dibutyl sebacate according to the mass ratio of 2 to 1 to 1. The invention also provides a preparation method of the gradient flame-retardant explosion suppressant. Through formula optimization, especially adjustment of the composite stabilizer and reinforcement of a raw material pretreatment process, the explosion suppressant can be stably stored and operated within the range of-40 DEG C to 50 DEG C, the application limitation in extremely cold and high-temperature areas is solved, and the explosion suppressant is suitable for most of extreme temperature environments in the world.

The invention relates to the technical field of adhesives, and discloses an imidazolium ionic liquid and a preparation method and application thereof, the preparation method comprises the following steps: reacting omega-bromoalcohol with 1-(methoxymethyl) imidazole in acetonitrile, and washing with methyl tert-butyl ether to obtain a target ionic liquid precursor; and dissolving the product in acetonitrile, adding 4-trifluoromethyl phenyl isocyanate, and washing with methyl tert-butyl ether after the reaction is finished, thereby obtaining the target imidazolium ionic liquid. The imidazolium ionic liquid disclosed by the invention is applied to a PVB (Polyvinyl Butyral) adhesive, and the PVB adhesive shows excellent adhesion strength in a macroscopic adhesion performance test on the basis of multiple interactions, and particularly has excellent adhesion strength on aluminum. The obtained adhesive can be universally adapted to various substrates such as metal substrates and macromolecule substrates, and finally high-strength and high-durability intelligent adhesion performance is achieved.

The invention discloses an SBS modified asphalt regenerant, regenerated asphalt and a preparation method, and belongs to the technical field of road engineering. The invention solves the problems that the regeneration effect is poor and the high-value utilization of the aged asphalt and the asphalt mixture is difficult to realize when the regenerated asphalt is prepared only by doping the base oil at present. The styrene-butadiene-styrene block copolymer composition comprises the following components in parts by weight: 80-100 parts of styrene-butadiene-styrene block copolymer; 35 to 50 parts of epoxidized soybean oil; 5 to 8 parts of bis (2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane; and 14 to 20 parts of low density polyethylene. The purpose of recovering the high-temperature performance and the low-temperature performance of the SBS modified asphalt can be achieved.

The invention relates to the field of pipeline materials, and discloses a halogen-free flame-retardant MPP power pipeline material and a preparation method thereof.The pipeline material comprises polypropylene, modified multi-walled carbon nanotubes, a coating filler, a compatilizer and a lubricant; the modified multi-walled carbon nanotube is prepared by carrying out acylating chlorination on an oxidized multi-walled carbon nanotube by using thionyl chloride and then reacting with an aminated cyclotriphosphazene derivative; according to the aminated cyclotriphosphazene derivative, phosphonitrilic chloride trimer and 3, 5-di-tert-butyl-4-hydroxybenzylamine react to prepare a cyclotriphosphazene intermediate, the cyclotriphosphazene intermediate and N, N '-bis-(2, 2, 6, 6-tetramethyl-4-piperidyl)-1, 6-hexamethylenediamine are subjected to substitution to prepare a cyclotriphosphazene derivative, and then the cyclotriphosphazene derivative and 1, 6-hexamethylenediamine are subjected to substitution to obtain the aminated cyclotriphosphazene derivative. The coating filler is prepared by preparing modified lignin by combining 2, 2, 6, 6-tetramethyl-4-piperidinol and lignin and then preparing silicon dioxide-coated modified lignin by adopting a sol-gel method, and the pipe prepared by the invention has excellent mechanical properties, flame retardance, thermo-oxidative aging resistance and ultraviolet aging resistance.

The invention belongs to the technical field of fiber felts, and particularly relates to a preparation method of a bamboo / wood / PP fiber felt for automotive interiors and a composite material of the bamboo / wood / PP fiber felt.The bamboo / wood / PP fiber felt is formed by opening, scattering, fully mixing and carding mixed fibers composed of wood fibers and modified bamboo fibers and PP fibers to form a fiber net, and then the fiber net is needled to form a dense felt material; wherein the modified bamboo fiber is prepared by the following steps: mixing 3, 5-di-tert-butyl-4-hydroxybenzaldehyde, methyl undecyl ketone, a sodium hydroxide solution and ethanol for reaction to obtain a hindered phenol material; mixing and reacting the hindered phenol material, chloroplatinic acid and tetrahydrofuran to obtain a long-chain alkyl hindered phenol grafted material; bamboo fibers, an ethanol solution and the long-chain alkyl hindered phenol grafting material are mixed and react, and modified bamboo fibers are obtained; the ultraviolet light stability of the bamboo / wood / PP fiber felt for the automotive trim is improved, and the tensile property of the bamboo / wood / PP fiber felt for the automotive trim can be greatly enhanced.

The invention relates to the technical field of preparation of polyurethane plastic materials, in particular to an environment-friendly high-elasticity foaming material as well as a preparation method and application thereof. The preparation method of the foaming material comprises the following steps: perfluorooctyl sulfonyl fluoride and diaminopropyl polydimethylsiloxane are subjected to a reaction, and fluorine-containing polydimethylsiloxane is obtained; the preparation method comprises the following steps: reacting 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propanohydrazide with terephthalic diisothiocyanate to obtain isothiocyanate modified hindered phenol; the isothiocyanate modified hindered phenol reacts with primary amine at the terminal position of a fluorine-containing polydimethylsiloxane molecule through an isothiocyanate group to obtain an intermediate, and the intermediate is subjected to a desulfurization reaction to obtain a modifier; the preparation method comprises the following steps: reacting diisocyanate with polyether polyol, polyester polyol and natural polyol to obtain a component A, and stirring and mixing polyether polyol, a bio-based chain extender, a modifier, a catalyst and a foaming agent to obtain a component B; stirring and mixing the component A and the component B, and foaming to obtain the environment-friendly high-elasticity foaming material.

The present application relates to the field of environmental protection additives, specifically disclosing a natural gas low-temperature combustion-supporting environmental protection additive and its preparation method. The natural gas low-temperature combustion-supporting environmental protection additive comprises the following substances in parts by weight: 10 to 50 parts of dimethyl carbonate, 0 to 10 parts of methyl tert-butyl ether, 10 to 20 parts of methanol, and 15 to 20 parts of dispersed catalytic particles; the dispersed catalytic particles are carbon aerogels adsorbed with nano-Pt particles. The natural gas low-temperature combustion-supporting environmental protection additive of the present application uses dimethyl carbonate, methyl tert-butyl ether, and methanol as liquid matrices, and a carbon aerogel material adsorbed with the precious metal Pt as a catalytic material. The environmental protection additive material is effectively coated and loaded in the boiling gas phase. A uniform bonding form is formed between the gas-phase environmental protection additive and the natural gas, so that the methane in the natural gas opens the gas-hydrogen-oxygen bond under the action of the environmental protection additive at 80 to 100°C, effectively catalyzing the combustion of natural gas in an oxygen-rich state, further improving the activity of natural gas in a low-temperature environment.

The invention relates to the technical field of cables, in particular to a multi-layer co-extrusion cable based on a low-smoke halogen-free flame-retardant composite layer and a preparation method of the multi-layer co-extrusion cable based on the low-smoke halogen-free flame-retardant composite layer, and the multi-layer co-extrusion cable structurally comprises a conductor layer, a double-layer insulating layer, a reinforced buffer layer and a composite sheath layer from inside to outside in sequence; wherein the double-layer insulating layer comprises an inner layer and an outer layer; the inner layer takes an ethylene-octylene copolymer as a core layer and takes a norbornene dianhydride grafted polyether ester elastomer as a shell layer, so that the material is endowed with high elasticity and impact resistance, and the cracking of the insulating layer is inhibited; the modified nano montmorillonite is dispersed into a nano lamellar barrier, so that heat diffusion is delayed, and low smoke and zero halogen are realized; the outer layer is composed of an ethylene-methyl acrylate matrix and di-tert-butyl phosphinic acid aluminum salt, the di-tert-butyl phosphinic acid aluminum salt is decomposed at high temperature to generate aluminum phosphate, a carbon layer is formed to isolate oxygen heat, and phosphorus-containing free radicals capture active free radicals to interrupt flame propagation.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

The invention discloses mongolian mongolian yeast and an application thereof. Relates to the technical field of fermentation. The invention provides a specific strain and application thereof in tobacco leaves. According to the tobacco leaf extracting solution fermented by the bacterial strain, the content of esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased, and the content of the esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased; three novel ester substances with fruit fragrance, rosin and other characteristic fragrances are newly generated, and the overall fragrance style is remarkably enhanced. It is shown that the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution has good aroma-producing capacity, and through the combined effect of enzymolysis and fermentation, the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution is expected to play an important application value in the field of quality improvement and aroma enhancement of tobacco leaf raw materials.

The invention relates to the technical field of electrochemical analysis and detection, in particular to a sensitive detection tert-butylhydroquinone modified glassy carbon electrode, a preparation method and application, the sensitive detection tert-butylhydroquinone modified glassy carbon electrode has high specific surface area and catalytic activity and good conductivity, sensitive detection of tert-butylhydroquinone can be achieved, and the application range is wide. The modified glassy carbon electrode comprises a glassy carbon electrode and a compound coating, the compound coating wraps the surface of the glassy carbon electrode, and the compound coating is composed of graphene oxide and a Ti-based MOF derivative; the preparation method comprises the following steps: (1) preparing MIL-125 (Ti); (2) preparation of TiO2 / NC; (3) preparation of 15% GO (at) TiO2 / NC; (4) preparing a dispersion liquid of the prepared 15% GO-coated TiO2 / NC composite material; (5) manufacturing a modified electrode; the application comprises the following steps: S1, establishing a concentration-electrochemical response signal relationship; and S2, measuring the concentration of the to-be-measured substance.