5 results about "Phenyl isocyanate" patented technology

This invention provides an ether-based electrolyte for improving the high-voltage and long-cycle stability of sodium-ion batteries, its preparation method, and its application. The ether-based electrolyte comprises a base electrolyte and additives; the additives include aromatic isocyanates and alkoxysilanes. The aromatic isocyanates are a combination of one of the following: 6-fluoro-1H-1,3-benzodioxane-8-yl isocyanate, 3,4-dihydro-1,5-benzodioxane-7-isocyanate, or 3,4-(methylenedioxy)phenyl isocyanate, and 4-trifluoromethoxyphenyl isocyanate; the alkoxysilanes are 2-cyanoethyltriethoxysilane or 3,3,3-trifluoropropyltriethoxysilane. The electrolyte of this invention achieves synergistic regulation of interfacial reactions and interfacial film evolution, is suitable for sodium-ion half-cells or full-cells, and can improve overall stability and operating efficiency under high-voltage and long-cycle operating conditions.

The application provides a self-repairing ceramic fiber composite material, a preparation method and application, and belongs to the technical field of ceramic fibers. The self-repairing ceramic fiber composite material is prepared by the carbamoylation reaction between isocyanate groups generated by the pyrolysis of phenylcarbamate and hydroxyl groups on the surface of ceramic fibers to generate polymers with urea groups of dynamic covalent bonds. Meanwhile, the urea groups also interact with imidazole-based ionic liquids through hydrogen bonds to form a dynamic hydrogen bond network. The network and the network structure of the phenyl isocyanate polymer are dynamically interpenetrated to form a double dynamic network, so that the composite material has a self-repairing function. The self-repairing ceramic fiber composite material has self-repairing performance, high tensile strength and ionic conductivity, and is suitable for preparing new energy batteries, capacitors or flexible sensors.

This invention relates to the technical field, specifically to a method for preparing high-purity n-hexane based on selective extraction of non-aromatic hydrocarbons. The method includes first suspending and polymerizing a first oil phase in a continuous aqueous phase to form cross-linked polymethacrylate core microspheres, then adding a second oil phase containing glycidyl methacrylate for further polymerization to obtain a cross-linked polymethacrylate microsphere matrix; swelling the microsphere matrix with n-heptane / ethyl acetate, then sequentially amination, followed by sequential reaction with n-butyl isocyanate and 2-(trifluoromethyl)phenyl isocyanate to obtain a selective extraction resin; activating and packing the resin into a column for the separation of non-aromatic C6 mixed hydrocarbons, collecting the fraction with a n-hexane mass fraction greater than 99.2 wt% to obtain high-purity n-hexane. This method has the advantages of high separation selectivity and good cycle stability.

This invention provides a nano-blocking agent, its preparation method, and its application. The steps include: (1) mixing a first raw material system comprising nano-zinc aluminum oxide and aromatic carboxylic acid in an alcohol solvent to carry out a first reaction, thereby obtaining a first material; (2) mixing a second raw material system comprising polyether polyol and phenyl isocyanate to carry out a second reaction, thereby obtaining a second material, and then emulsifying the second material to obtain a polyurethane dispersion; (3) mixing the polyurethane dispersion with the first material to obtain the nano-blocking agent. This nano-blocking agent utilizes the π-π adsorption principle to enhance the sealing effect of microcracks in coal and rock.

The application relates to the technical field of defoaming agent preparation, in particular to a high-content organic silicon defoaming agent composition for a high-temperature and high-shear system. The high-content organic silicon defoaming agent composition is prepared by the following steps: firstly, octamethylcyclotetrasiloxane, tetramethyltetraphenylcyclotetrasiloxane and hydrogen-containing polymethylsiloxane are copolymerized to construct a methylphenyl polysiloxane skeleton; secondly, acetyl-terminated allyl epoxy oxirane / epoxy propane copolyether and allyl glycidyl ether are introduced step by step; then, the obtained product is sequentially reacted with N,N-diethyl-1,3-propanediamine, phenyl isocyanate, diisopropylamine and maleic anhydride to obtain a urea-based / esterified modified polysiloxane; finally, the urea-based / esterified modified polysiloxane is compounded with methylphenyl silicone oil, dimethyl silicone oil, hydrophobic fumed silica and precipitated silica to obtain the high-content organic silicon defoaming agent composition. The obtained defoaming agent has the advantages of instant defoaming, excellent sustained defoaming, strong shear resistance, storage stability and no floating oil in a high-temperature circulating cleaning liquid system, a high-speed sand mill slurry system and the like.