7results about How to "Reduce water absorption rate" patented technology

The invention discloses a preparation method of hydrophobic modified lithium titanium aluminum phosphate powder for diaphragm coating. The preparation method comprises the following steps: proportionally adding a sanding solvent, a polymeric dispersant and LATP coarse powder into a high-speed dispersion tank, and stirring; carrying out nano sanding treatment on the mixed solution through a sand mill, and sanding to obtain a nano dispersion liquid with uniform particle size distribution; reducing the grinding rotating speed of the sand mill, adding silicon resin for low-speed sanding treatment, and coating the surface of the LATP with the silicon resin to obtain hydrophobic modified LATP dispersion liquid; and carrying out spray drying on the hydrophobically modified LATP dispersion liquid to obtain the hydrophobically modified LATP powder after drying. The method is suitable for preparing the LATP nano-powder for coating the diaphragm; on one hand, the silicon resin is adopted for coating the surface of the LATP nano-powder, so that the water content and the water absorption rate of the powder can be obviously reduced; on the other hand, the processing process of the LATP nano powder is shortened, energy consumption and labor are saved, the manufacturing cost of the hydrophobic modified LATP is powerfully reduced, and the method is suitable for large-scale batch production.

The invention belongs to the technical field of functional polymers, and particularly relates to a high-water-absorption konjac hydrogel polymer and a preparation method thereof. The konjac hydrogel polymer is prepared from the following raw materials in parts by weight: 30 to 40 parts of acetylated konjac glucomannan, 10 to 15 parts of modified chitosan, 5 to 8 parts of calcium chloride solution, 1 to 3 parts of acetic acid solution, 3 to 5 parts of nano cellulose, 2 to 5 parts of beewax, 10 to 15 parts of MCT medium chain triglyceride and 1 to 3 parts of emulsifier. According to the invention, through acetylation modified konjac glucomannan, hydrophilicity is reduced, water absorption is delayed, and stability of an acidic environment is improved; the mechanical strength is enhanced through crosslinking, the hydrophobicity is improved through chitosan modification, and the mechanical strength and toughness are improved through nanocellulose; the surface is coated with a beeswax and MCT mixture to adjust the surface property and delay water absorption; an interface induction method is combined with a freeze-drying technology to generate a porous structure, so that the water absorption efficiency and the structural integrity are improved.

The present invention belongs to the technical field of lithium ion batteries, and particularly relates to a positive electrode slurry auxiliary agent, a positive electrode slurry and a preparation method thereof, the positive electrode slurry auxiliary agent comprises: a component A, which is a functional monomer capable of reducing the water absorption rate of a pole piece, and is a non-polymer organic acid containing an acidic group; the component B is a functional monomer with a dispersion effect; the component C is a synergistic agent; and, an organic solvent; the component A and the component B form the positive electrode slurry auxiliary agent under the action of the synergist component C. A positive plate prepared from the positive electrode slurry auxiliary agent and the positive electrode slurry has good anti-cracking performance and relatively low water absorption rate.

The invention is applicable to the technical field of solid waste resource utilization and novel building material preparation, and provides solid waste based lightweight fine-grained ceramsite as well as a preparation method and application thereof, and the ceramsite is prepared from titanium gypsum, iron tailing powder, a solid waste based cementing material, a chelating agent, a nanocrystalline nucleus early strength agent and mixing water according to a specific proportion. The preparation method comprises the following steps: dry mixing of raw materials, preparation of an additive solution, wet mixing, rolling granulation, normal-temperature curing, 60-95 DEG C low-temperature steam curing and drying. According to the invention, the titanium gypsum, the iron tailing powder and other low-value solid wastes are used as main raw materials, and the lightweight fine-grained ceramsite with small particle size, stable structure, low water absorption and low dry density is successfully prepared through an optimized ratio and a unique low-temperature steam curing process. The product can be used as a fine aggregate to be applied to plastering mortar, completely or partially replaces natural gravel, and the mechanical property and construction stability of the mortar are improved while the mortar capacity is reduced.

The application discloses an anti-impact and anti-scratching automobile hub cover and a preparation method thereof, and relates to the technical field of high polymer materials.The automobile hub cover comprises at least: 100 parts of nylon 6 resin; 5-15 parts of bismaleimide resin prepolymer; 10-15 parts of hydrogenated styrene-butadiene block copolymer grafted maleic anhydride; 10-20 parts of modified basalt fiber; 5-15 parts of modified polyarylate fiber; 0.2-0.5 parts of antioxidant; 0.3-0.8 parts of light stabilizer; 2-4 parts of color master batch; 0.3-0.8 parts of lubricant; the bismaleimide resin prepolymer is prepared by mixing 4,4'-diphenylmethane bismaleimide and 2,2'-diallyl bisphenol A; the modified basalt fiber is co-precipitated and modified by polydopamine, polyethyleneimine and octaamino cage-shaped polyhedral oligomeric silsesquioxane functionalized graphene oxide; and the modified polyarylate fiber is co-precipitated and modified by polydopamine and polyethyleneimine.The automobile hub cover prepared by the application has low moisture absorption, high impact resistance and excellent scratch resistance.

The invention relates to a trans-solar cell module based on a 1-allyl-3-methylimidazolium hexafluorophosphate perovskite additive and a preparation method of the trans-solar cell module, and relates to the field of solar cells. The perovskite solar module structure sequentially comprises transparent conductive glass, a hole transport layer, a perovskite layer, an electron transport layer and a back electrode layer from bottom to top. An additive with a certain concentration is added into the perovskite layer, the additive is 1-allyl-3-methylimidazolium hexafluorophosphate, and the concentration of the additive is 0.2 mg / ml to 2.0 mg / ml. The crystallization process of the large-area perovskite thin film is optimized through the 1-allyl-3-methylimidazolium hexafluorophosphate additive, the defect concentration of the thin film is reduced, and the performance of the perovskite photovoltaic module is improved.

The application discloses a self-degradation temporary plugging agent and a preparation method and application thereof. The raw materials of the self-degradation temporary plugging agent are composed of the following components in parts by weight and the total mass is 100 parts: 19.4-20 parts of hydrophilic polymer monomer, 10.5-1 parts of modified nano-particle NP-1, 0.1-0.5 parts of hydrophobic monomer, 0.12-0.2 parts of crosslinking agent, 0.8-1 parts of initiator, and the balance of water; the hydrophilic polymer monomer is acrylamide and / or acrylic acid; the hydrophobic monomer is selected from one or more of cetyl dimethyl allyl ammonium chloride, dimethyl diallyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride; the crosslinking agent is polyethylene glycol diacrylate; and the modified nano-particle NP-1 is nano-SiO2 which is hydrophobically modified by a silane coupling agent. The temporary plugging agent has a certain plugging strength under high pressure difference conditions and can be self-degraded into a low-viscosity solution in a wide temperature range (40-120 DEG C).