7 results about "Propanethiol" patented technology

The invention discloses a thermal antistatic fabric based on polyamide fibers and a preparation method thereof, and relates to the technical field of textile fibers. When the thermal antistatic fabric based on the polyamide fiber is prepared, caprolactam, a flame retardant and hexamethylenediamine react to prepare pre-modified polyamide; the pre-modified chinlon and 3-chloro-1-propanethiol are subjected to a reaction, and modified chinlon is prepared; the preparation method comprises the following steps: sequentially reacting graphene oxide with mercaptopropyltrimethoxysilane and 2-(2H-benzotriazole-2-yl)-4-methyl-6-(2-propenyl) phenol, so as to obtain modified graphene oxide; the modified chinlon and the modified graphene oxide are mixed and then subjected to melt spinning, and modified chinlon fibers are obtained; and twisting the modified polyamide fiber, spinning, and post-processing to obtain the thermal antibacterial fabric based on the polyamide fiber. The warm-keeping antistatic fabric based on the polyamide fiber has good warm-keeping, antistatic, flame-retardant, anti-aging and mechanical properties.

This invention relates to a method for preparing electronic-grade hydrofluoric acid. The invention utilizes a microchannel reactor for the fluorine oxidation reaction, significantly reducing fluorine consumption and safety hazards during production. Furthermore, the microchannel reactor enhances the gas-liquid two-phase mass transfer during the oxidation reaction, further improving impurity removal and product quality. The addition of multi-effect distillation to the distillation process not only enables secondary heat utilization but also saves on the use of high-temperature heating media at the bottom of the column, effectively reducing energy consumption. In the modified liquid, DMF serves as the solvent, cobalt nitrate provides cobalt ions, and vinylguanidine provides guanidine functional groups and amino groups. Ammonia and propanethiol are used as plasma gases to introduce amino and thiol groups onto the membrane surface. These groups help improve membrane selectivity, effectively separating metal and non-metal ions, as well as acidic impurities in the raw materials.

The invention discloses high-thermal-stability bisphenol A and a preparation method thereof. The high-thermal-stability bisphenol A comprises isopropenyl phenol with the mass concentration smaller than or equal to 10 ppm, preferably 3-8 ppm. The relationship between the content of isopropenyl phenol in the product and the ultraviolet light absorptivity of a melt in a special wave band is determined. The residual amount of isopropenyl phenol in the product is adjusted by adjusting the addition amount of n-propanethiol in the reaction process, so that the thermal stability of the bisphenol A product is automatically adjusted, and the high thermal stability of the product is ensured. The bisphenol A has the advantages of high thermal stability and low melting color number, and ensures the optical properties of downstream products.

This invention provides a fluorine-free silicone-containing waterproofing agent, its preparation method, and its application, belonging to the technical field of textile functional finishing agents. The fluorine-free silicone-containing waterproofing agent provided by this invention comprises, by mass percentage: 10-15% modified silicone resin, 10-15% modified polysiloxane, 1-5% surfactant, 5-10% organic solvent, and the balance being water. This invention modifies the silicone resin using 2-(trimethylsilane)ethanethiol and 3-chloro-1-propanethiol, introducing shorter-chain hydrophobic groups and polar groups with stronger hydrophobicity. Simultaneously, the modified silicone resin is dissolved using polysiloxane modified with shorter-chain hydrophobic groups, thereby improving the waterproofing and wash resistance of the fluorine-free silicone-containing waterproofing agent.

The invention discloses a high-temperature-resistant anti-aging electronic component coating and a preparation method thereof, and relates to the technical field of coatings. The high-temperature-resistant anti-aging electronic component coating prepared by the invention is prepared from the following raw materials in parts by weight: epoxy resin, modified soybean oil, a silane fluorenyl epoxy monomer, a curing agent, modified mica powder and acetone. The preparation method comprises the following steps: enabling soybean oil to react with 3-(dimethylamino)-1-propanethiol and epoxy chloropropane in sequence, and introducing quaternary ammonium salt and an epoxy group to the soybean oil; the preparation method comprises the following steps: reacting bisphenol fluorene with dichlorodiphenyl silane and epoxy chloropropane in sequence to obtain an epoxy monomer containing a siloxane structure and fluorenyl, and participating in curing of the coating; mica powder with excellent thermal stability is subjected to surface modification with kh550 and then reacts with protocatechuic acid, and the protocatechuic acid is loaded on the mica powder. Through the improvement, the coating is endowed with excellent high-temperature resistance and antibacterial ability.

The invention provides a fluoride-free silicon-containing waterproof agent and a preparation method and application thereof, and belongs to the technical field of textile functional finishing agents. The fluoride-free silicon-containing waterproof agent provided by the invention comprises the following components in percentage by mass: 10-15% of modified silicon resin, 10-15% of modified polysiloxane, 1-5% of a surfactant, 5-10% of an organic solvent and the balance of water. Silicon resin is modified through 2-(trimethylsilane) ethanethiol and 3-chloro-1-propanethiol, a short-chain hydrophobic group and a polar group which are higher in hydrophobicity are introduced, meanwhile, polysiloxane modified by the short-chain hydrophobic group is adopted for dissolving the modified silicon resin, and the waterproofness and the washability of the fluorine-free silicon-containing waterproof agent are improved.

The invention discloses a method for strengthening accumulation of extracellular elemental sulfur by pseudomonas putida during degradation of propanethiol through gene knockout. The method comprises the following steps: by taking a propanethiol degrading bacterium Pseudomonas putida S-1 as an original strain, in a basic salt culture medium taking propanethiol as a unique carbon source, the S-1 can degrade propanethiol and generate separable extracellular elemental sulfur (sulfur balls) at the same time; extracellular sulfur ball accumulation can be enhanced by knocking out the persulfide dioxygenase coding gene in the S-1 strain, the yield of the extracellular elemental sulfur is increased by 69.2% compared with that of a wild type, and the yield of the elemental sulfur is increased while propanethiol is degraded by microorganisms.