12results about How to "Increase surface polarity" patented technology

This invention pertains to compositions of polymeric compounds, specifically a recycled rubber powder modified asphalt based on a renewable composite activator, its preparation method, and its application. The recycled rubber powder modified asphalt comprises a base asphalt and activated rubber powder in a mass ratio of 1:(0.2~0.3). The activated rubber powder comprises waste tire rubber powder and a composite activator in a mass ratio of 10:(0.8~1.5). The composite activator comprises an organic phase and an inorganic phase in a mass ratio of (1.5~3):1. The organic phase is a chitosan-amino acid derivative, and the inorganic phase is a layered bimetallic hydroxide. Compared with existing technologies, the rubber powder modified asphalt prepared by this invention exhibits good high-temperature storage stability and interfacial structural integrity, demonstrating excellent anti-aging properties and high-temperature rutting resistance during long-term service.

The invention provides a carbon fiber reinforced polyether-ether-ketone self-lubricating composite material and a preparation method and application thereof.The preparation method comprises the steps that carbon fiber serves as an anode, voltage is applied to an electrolyte solution, electrochemical oxidation treatment is conducted, hydroxylated carbon fiber is obtained, the hydroxylated carbon fiber and 2-amino-5-nitrobenzothiazole are mixed, and the carbon fiber reinforced polyether-ether-ketone self-lubricating composite material is obtained. Adding an anhydrous modified reaction solvent, and reacting at 25-40 DEG C for 4-10 hours to obtain modified carbon fibers; and melting and granulating the self-lubricating composite material: mixing the modified carbon fiber, polyether-ether-ketone, a lubricant and an auxiliary agent in a high-speed mixer for 10-20 minutes, extruding by using a double-screw extruder, cooling, and granulating to obtain the carbon fiber reinforced polyether-ether-ketone self-lubricating composite material. The carbon fiber reinforced polyether-ether-ketone self-lubricating composite material is applied to self-lubricating mechanical parts. According to the self-lubricating composite material, the self-lubricating performance is improved, the interface bonding energy between the carbon fibers and the polyether-ether-ketone is enhanced, and the self-lubricating composite material has good mechanical performance.

This invention relates to a volatile organic compound (VOC) adsorbent material and its preparation method. The method involves first modifying a 5A molecular sieve with lithium, followed by vanadium modification to obtain a Li-V-5A adsorbent material. Based on the total mass of the adsorbent material, the Li content is 0.8%–4.5%, and the V content is 0.2%–1%. The adsorbent material obtained by this invention, using a 5A molecular sieve as a matrix and modified to obtain the Li-V-5A adsorbent material, has advantages such as good adsorption effect on low-carbon hydrocarbons and strong resistance to sulfur poisoning, especially high adsorption and removal rate of ethane.

The application discloses an enhanced polytetrafluoroethylene composite framework structure composite material and a preparation method thereof. The material is composed of polysulfone modified polytetrafluoroethylene resin, carbon fiber, molybdenum disulfide, a reactive silicone resin precursor and a platinum catalyst, a continuous three-dimensional siloxane network is constructed in situ at the interface through a silicon hydrogen addition cross-linking, and a multi-scale reinforced framework structure is formed in cooperation with the carbon fiber. The material has excellent mechanical properties, creep resistance and wear resistance, and is suitable for high-performance sealing and wear-resistant fields.

The present application relates to the technical field of paint, in particular to an alkali-resistant waterproof exterior wall paint and a preparation method thereof. In order to further improve the water resistance and alkali resistance of the stone-like paint, the stone-like paint is improved, a texture protective paint is added to the structure of the traditional stone-like paint, and colored sand is added to the components, so that a concave-convex texture can be provided for the surface of the stone-like paint after the stone-like paint is finally formed. In addition, boron nitride nanosheets are added to the texture protective paint and modified, and fluorine and silicon elements are introduced into the boron nitride nanosheets, so as to improve the chemical corrosion resistance of the resin, prevent the infiltration and invasion of external corrosive media, and effectively improve the acid and alkali resistance of the resin paint.

The application provides a kind of fabric reinforced polymer composite material and preparation method, the method is first by hydroentanglement process thermoplastic fiber web is fixed on the two sides of fabric, and hydroentanglement makes thermoplastic fiber in thermoplastic fiber web and fabric interpenetration and hold together, and combine firmly;After drying, the polymer surface film is covered on the two sides of base cloth layer, and the polymer surface film is combined with base cloth layer by heating, because the surface of base cloth layer is the same material as the composition of polymer surface film, the material remains consistent, it is convenient for hot forming fusion, thereby increasing the peel strength, and improving the adhesion strength of composite material coating.Moreover, when the hydroentanglement medium is polymer solution, the polymer solution will remain in the pores of fabric and thermoplastic fiber web during the hydroentanglement process, and when subsequent drying and heating, the polymer in the pores will be integrated with the thermoplastic fiber web, thereby further enhancing the peel strength.

The extra-black color paste for coloring the gum fiber stock solution comprises the following raw materials in parts by weight: 35-40 parts of modified carbon black, 10-15 parts of a dispersing agent, 2-4 parts of a pH regulator and 30-35 parts of water. According to the invention, the surface polarity of the carbon black can be improved, agglomeration can be reduced, ball milling coating is carried out through an additive solution (containing a basalt fiber modifier, boron nitride, chitosan and yttrium nitrate), the dispersion uniformity of carbon black particles is further improved, the light absorption capability can be enhanced through the uniform dispersion of the carbon black particles, the blackness of the color paste is greatly improved, and the coloring requirement of special black is met.

This invention relates to the field of textile fabric technology, specifically to a high-elasticity fiber fabric and its molding process. The fabric comprises a knitted base fabric woven from nylon-coated modified polyurethane elastic fiber-coated yarn. The modified polyurethane elastic fiber comprises a core elastic polyurethane phase and a surface hard-segment enriched phase. The surface phase is formed by a composite of polycarbonate diol-type high-hardness polyurethane prepolymer, hydrophilic fumed silica, hydrophobic fumed silica, and hydroxyalkyl-terminated polydimethylsiloxane. This invention significantly improves the interfacial stability between the core yarn and nylon without increasing fiber usage or fabric tightness, giving the fabric high elastic recovery rate, low dimensional change after washing, and excellent sweat and heat resistance, thus solving the problem of easy loosening and deformation in traditional high-elasticity fabrics.

The application discloses a preparation method of a high-fluorine-containing crosslinked polyimide nanofiber membrane, and comprises the following steps: synthesizing a polyamide acid precursor solution by mixing hexafluoro aromatic diamine and aromatic dianhydride in a solvent, preparing the polyamide acid precursor solution into a spinning solution, preparing a polyamide acid nanofiber membrane by a high-pressure electrospinning method, drying the polyamide acid nanofiber membrane in a vacuum environment at 100-200 DEG C for 0.5-1 h, then increasing the temperature to 200-300 DEG C and heating for 2-4 h, and finally increasing the temperature to 300-350 DEG C under nitrogen to perform thermal amidation and thermal crosslinking, and the holding time is 1-2 h. The application further discloses a lithium ion battery separator, which is the high-fluorine-containing crosslinked polyimide nanofiber membrane prepared by the above method. The introduction of dihydroxy and chemical crosslinking solve the problem that too high fluorine group content makes the solubilization ability of the polyimide membrane to the electrolyte too strong, and realize the application of the high-fluorine-containing nanofiber membrane as a high-performance lithium ion battery separator.

The application discloses a perovskite flexible solar cell and lithium-sulfur battery integrated self-charging system and a preparation method thereof. The system comprises a perovskite flexible solar cell and a lithium-sulfur battery. The perovskite flexible solar cell comprises a flexible substrate, a transparent conductive layer and a plurality of perovskite cell units arranged in sequence. The perovskite cell unit comprises an electron transport layer, a perovskite layer and a hole transport layer arranged in sequence. Each perovskite cell unit is in a series connection relationship. The positive electrode of the last perovskite cell unit serves as the positive electrode of the perovskite flexible solar cell. The negative electrode of the first perovskite cell unit serves as the negative electrode of the perovskite flexible solar cell. The lithium-sulfur battery comprises a positive electrode, a negative electrode and a solid electrolyte. The positive electrode is electrically connected with the positive electrode, and the negative electrode is electrically connected with the negative electrode, so as to form a loop. The application can improve the integration, overall efficiency and stability of the self-charging system.

This invention discloses a high thermal conductivity and electromagnetic shielding polyimide coating and its preparation method, belonging to the field of polyimide coating technology. The coating comprises the following raw materials in parts by weight: 32 parts of diamine monomer, 33 parts of dianhydride monomer, 582 parts of organic solvent, and 3.4-11.5 parts of nitrogen-doped helical carbon nanotube-supported carbon nanofibers. The preparation method includes the following steps: ultrasonically dispersing nitrogen-doped helical carbon nanotube-supported carbon nanofibers in an organic solvent; then, under nitrogen protection and an ice-water bath condition, dissolving the diamine monomer in the dispersion; and then adding the dianhydride monomer to carry out a polycondensation reaction to obtain a high thermal conductivity and electromagnetic shielding polyimide coating. This invention, through an integrated design of "composition-structure-interface," constructs an efficient and stable three-dimensional multifunctional network within the polyimide matrix, achieving a synergistic improvement in the coating's electromagnetic shielding and thermal conductivity performance, providing an ideal material solution for the field of high-end electronic packaging and protection.

This invention relates to a VOCs adsorbent material and its preparation method. The method involves first modifying a 5A molecular sieve with lithium, and then modifying it with titanium to obtain a Li-Ti-5A adsorbent material. Based on the total mass of the adsorbent material, the Li content is 0.65%–4.2%, and the Ti content is 0.15%–0.85%. The adsorbent material obtained by this invention is a Li-Ti-5A adsorbent material obtained by modification using a 5A molecular sieve as the matrix. This material has advantages such as good adsorption effect on low-carbon hydrocarbons and good thermal stability, especially with better adsorption effect on propane.