20results about How to "Lower contact angle" patented technology

The application relates to the technical field of lithium battery diaphragm, in particular to a high-stability lithium battery diaphragm and a preparation method thereof. The high-stability lithium battery diaphragm is prepared by the following steps: after a polypropylene film is irradiated by ozone and ultraviolet light in sequence, pre-deposition and pre-grafting are carried out on the surface of the polypropylene film, and then ultraviolet radiation treatment is carried out. The application realizes synergistic effect of nano-enhancement and self-repairing, solves the stability problem of traditional PP diaphragms in long-term cycles, and provides a reliable diaphragm solution for high-energy-density lithium batteries.

The invention discloses a low-temperature-resistant negative electrode zinc paste and a low-temperature alkaline zinc-manganese battery containing the zinc paste. The negative electrode zinc paste comprises the following components in parts by weight: 60-65 parts of zinc powder, 1-2 parts of a composite conductive agent, 0.1-0.3 part of a composite corrosion inhibitor and 35-38 parts of a low-temperature electrolyte; the low-temperature electrolyte comprises a multi-element nonionic surfactant system, a multi-element nano anti-freezing agent system and a mixed solution A, the 3.9 ohm discharge capacity of the battery under the condition of-40 DEG C is larger than or equal to 60% compared with the capacity retention rate at normal temperature, the interface impedance amplification is smaller than or equal to 15%, the hydrogen evolution amount is reduced by 80% on year-on-year basis, the process is compatible with an existing production line, and the battery is suitable for polar scientific investigation and electronic equipment in plateau and cold regions.

The application discloses a method for super-hydrophilic modification of polyamide fiber based on DES combined with multiple enzymes, and belongs to the technical field of functionalized textiles.The method for super-hydrophilic modification specifically comprises the following steps: immersing the polyamide fabric after refining treatment into DES for pretreatment, taking out and drying; then immersing into a protease modification solution for reaction; after the reaction is completed, washing, drying and balancing; then immersing into a mixed solution formed by laccase, TEMPO, trehalose and a buffer solution for reaction; after the reaction is completed, washing, drying, balancing and hydrophilic modification of the polyamide fabric are obtained; the super-hydrophilic modified polyamide fabric can reach a surface static contact angle of 9 degrees within 60 seconds, and the contact angle is reduced by 90.2 percent; the method has low energy consumption, is safe and environmentally friendly, and has good durability of hydrophilic modification.

The invention discloses a light-weight lithium battery diaphragm with high heat resistance and high wettability and a preparation method thereof.The light-weight lithium battery diaphragm with high heat resistance and high wettability comprises a base membrane and a coating on the base membrane, and the coating comprises porous aluminum oxide, carboxymethylated nanocellulose, acetylated nanocellulose, polyurethane, sodium hexametaphosphate and ammonium polyacrylate; the porous aluminum oxide, the carboxymethylated nanocellulose, the acetylated nanocellulose, the polyurethane, the sodium hexametaphosphate and the ammonium polyacrylate cooperate to improve the liquid absorption rate, the liquid retention rate, the peel strength, the ionic conductivity, the heat resistance and the wettability of the diaphragm, and meanwhile, the water content of the diaphragm is reduced. The density of the porous aluminum oxide, the carboxymethylated nanocellulose and the acetylated nanocellulose is relatively low, so that the diaphragm is light in weight.

The invention relates to the field of refining and application of wood fiber biomass, and discloses a lignin-based formaldehyde-free adhesive, a lignin-based plywood and a preparation method and application of the lignin-based formaldehyde-free adhesive and the lignin-based plywood. The lignin-based formaldehyde-free adhesive disclosed by the invention comprises the following components: L-cysteine lignin, and the solid content of the lignin-based formaldehyde-free adhesive is 10-45wt%. The method comprises the following steps: mixing an aqueous solution of L-cysteine hydrochloride and lactic acid with raw materials for pretreatment; performing extraction and vacuum filtration on the obtained suspension to obtain dissolved lignin and hemicellulose filtrate, and performing extraction and purification on the filtrate to obtain L-cysteine lignin; the lignin-based formaldehyde-free adhesive is prepared by uniformly dispersing the L-cysteine lignin in water. According to the invention, the used solvent is green and nontoxic in source, the hydrated lignin-based adhesive with good fluidity is prepared with low solid content, and the prepared plywood shows excellent dry and wet bonding strength, solvent resistance and weather resistance, and meets the preparation requirements of national I-class plywood.

The application relates to the field of welding technology, and particularly discloses a water-soluble flux and a preparation method thereof. The water-soluble flux comprises the following raw materials in parts by weight: 6-12 parts of a borate ester covalent activator; 3-8 parts of cucurbituril hydrate; 0.01-2 parts of an inhibitor; 1-3 parts of a modified graphene quantum dot solution; 1-5 parts of a cyclic ether solvent; 0.5-2 parts of a metal-organic framework material containing mercapto groups; and 68-88.5 parts of deionized water. The modified graphene quantum dot solution is obtained by modifying graphene quantum dots with dioctadecyldimethylammonium chloride. The flux of the application can effectively solve the problem of water residue in the later stage after the activator is decomposed and volatilized in the early stage of welding by combining the water-soluble flux with the cyclic ether solvent, thereby reducing the problems of virtual welding, bubble defects and the like of the welding points, and effectively improving the strength and reliability of the welding points.

The invention discloses an electrolyte, a battery and a preparation method thereof, and relates to the technical field of batteries, the electrolyte comprises a basic solvent, an electrolyte salt, vinylene carbonate and an amphiphilic molecular additive; the structural formula of the amphiphilic molecular additive is R1-(CH2) n-R2. By adding the amphiphilic molecular additive into the electrolyte, the interfacial tension between the electrolyte and an electrode is remarkably reduced, the structural formula of the additive is R1-(CH2) n-R2, R1 is alkyl or aryl, the additive is endowed with hydrophobicity, and stable dispersion of the additive in the electrolyte is facilitated; r2 is carboxylate or sulfonate, hydrophilicity is provided, interaction between the electrolyte and the electrode is enhanced, due to the design, the electrolyte can permeate into a micropore structure of the electrode more easily, the solid-liquid interfacial tension is remarkably reduced, the contact angle of the electrolyte to the electrode is gradually reduced along with increase of the proportion of the additive, and the solid-liquid interfacial tension is remarkably reduced. Therefore, the wettability of the electrolyte on the electrode is obviously improved.

This invention belongs to the field of liquid metal field emission electric propulsion technology, specifically relating to a method for wetting porous metal materials with liquid metal. Addressing the problem of insufficient wetting affecting the overall performance of the liquid metal field emission electric propulsion system due to issues such as interface oxidation, pore degassing, and enhanced wetting drive during the fabrication of the emitter from porous metal materials through liquid metal wetting, this invention first removes impurities from the surfaces of the porous metal and liquid metal through multiple steps including ultrasonic cleaning, dilute acid immersion, and organic solvent cleaning, reducing the contact angle and improving wettability. Then, a tube furnace is used to achieve the required oxygen-free and high-temperature environment for wetting through gas washing, vacuuming, and heating. The wetting temperature is set to 800-1000℃, which further converts and sublimates oxides and reduces the surface tension of the liquid metal, thereby improving wettability. This invention's wetting method is low-cost, simple in process, and provides good wetting results.

The application discloses a phase change energy storage hot water circulation storage system, which comprises a heat storage box body with a heat preservation structure, a composite phase change heat storage module arranged in the heat storage box body, the composite phase change heat storage module comprising a phase change material base body and a three-dimensional heat conduction network reinforcing structure embedded in the phase change material base body, an inner built-in reinforced heat exchanger immersed in the composite phase change heat storage module, the inner built-in reinforced heat exchanger comprising a heat exchange main pipe and fins fixedly connected to the outer wall of the heat exchange main pipe, a temperature sensor group comprising at least a first temperature sensor arranged on a water inlet pipe, a second temperature sensor arranged on a water outlet pipe and a module temperature sensor arranged in the composite phase change heat storage module, and an intelligent controller. Compared with the prior art, the phase change energy storage hot water circulation storage system adopts the composite phase change material of the phase change material base body, the porous heat conduction framework and the nano heat conduction additive, so that the defects of low heat conductivity and slow response speed of the phase change material in the prior art are solved.

The present application belongs to the field of precision microfabrication, and discloses a microstructure substrate film forming method combining ultrasonic oscillation and doctor blade coating, comprising the following steps: positioning and fixing the microstructure substrate; improving the wettability of the microstructure substrate; removing the excess solution on the microstructure substrate and leveling the liquid film. The microstructure substrate is immersed into the solution in the ultrasonic instrument, the solution is oscillated by the amplitude and frequency of the ultrasonic wave, the contact angle of the solution at the bottom of the microstructure is reduced by the hysteresis effect of the contact angle, and the air layer at the bottom of the microstructure is removed by the cavitation effect of the ultrasonic wave, so as to enhance the wettability of the solution to the bottom of the microstructure. The wettability of the solution to the microstructure substrate is effectively improved, the problems of poor wettability of the solution to the bottom of the microstructure, multiple repetitive operations and long process in the existing single wet coating method are overcome, and the thin film with high coverage, ideal film thickness and uniformity is prepared on the microstructure substrate.

The application discloses a three-dimensional charcoal column-shaped biofilm filler, a preparation method and a sewage treatment system, and relates to the technical field of water treatment and environmental engineering materials. The whole is a six-prism structure, comprising a first structure layer and a second structure layer; the first structure layer is an annular closed structure; the second structure layer is an annular closed structure and is located on the inner side of the first structure layer; the first structure layer and the second structure layer are divided into a plurality of grids by a connecting rib, and a plurality of short fin plates are arranged on the inner wall of the grid. The filler has a large specific surface area and good biofilm formation capacity, can effectively avoid internal blockage, and has more microporous structures and functional groups on the surface of the filler, can release some organic substances and nutrients, can not only optimize the community structure of denitrifying microorganisms, but also can improve the denitrifying enzyme activity and functional gene abundance, so that the surface microorganism's sewage treatment capacity is effectively enhanced.

The invention provides a method for improving the binding force of an inorganic thermal control coating on the surface of a carbon / carbon composite material, which comprises the following steps: placing the carbon / carbon composite material in absolute ethyl alcohol, and carrying out ultrasonic cleaning and drying to finish ultrasonic cleaning; laser is adopted to continuously scan the surface of the carbon / carbon composite material, and laser cleaning is completed; spraying a surface treating agent on the surface of the carbon / carbon composite material subjected to laser cleaning; and spraying the inorganic thermal control coating on the surface of the carbon / carbon composite material sprayed with the surface treating agent, drying in the shade, curing, and forming the inorganic thermal control coating on the surface of the carbon / carbon composite material. According to the method, the binding force of the inorganic thermal control coating on the surface of the carbon / carbon composite material is improved through ultrasonic cleaning, laser cleaning and the bridging effect of the surface treating agent.

The invention discloses a macromolecular nano villus lotus-leaf-shaped oil-water hydrophobic and oleophobic filter screen and a manufacturing method thereof, and belongs to the technical field of macromolecular filter screens, the macromolecular nano villus lotus-leaf-shaped oil-water hydrophobic and oleophobic filter screen comprises a polyurethane filter screen-shaped base material, a villus surface mastoid process structure is formed on the surface of the polyurethane filter screen-shaped base material, and wax particles cover the surface of the villus surface mastoid process structure; the pore diameter of the medium-large-pore-diameter polyurethane filter-net-shaped base material is selected, so that the initial piezoresistance is extremely low, a basic channel is provided for high air volume, the fluffy face mastoid structures on the surface of the base material support water drops, an air layer is located between the water drops and the base material, and therefore direct contact between the water drops and the surface of the base material is blocked through air, and the air permeability is improved. The adhesive force is greatly reduced, the surface roughness is expanded through the composite structure that the surface of the mastoid process structure of the fluff face is covered with the wax particles, the surface energy is reduced through the wax particles, solid-liquid contact is reduced by capturing an air layer, an extremely high contact angle and an extremely low rolling angle are achieved, and the contact angle is increased to the super-hydrophobic range through the contact angle and the rolling angle jointly.

The application belongs to the technical field of polymer materials, and particularly relates to a high-strength and high-toughness polyamide composite material and a preparation method thereof. The composite material comprises the following components in parts by weight: 80-100 parts of long-chain semi-aromatic polyamide, 20-30 parts of oxidized carbon fiber, 10-20 parts of toughening agent, 5-10 parts of ethylene-acrylic acid ionomer, 1-3 parts of pentaerythritol-based polyol, and 1-6 parts of processing aid. The application adds a certain amount of ethylene-acrylic acid ionomer and pentaerythritol-based polyol in a long-chain semi-aromatic polyamide-oxidized carbon fiber reinforced system. During the melt blending process, the two modifiers of ethylene-acrylic acid ionomer and pentaerythritol-based polyol form an active layer rich in polar functional groups on the surface of the oxidized carbon fiber, improve the interfacial interaction between the polyamide and the filler, and solve the problem that the strength and toughness of the polyamide composite material in the prior art are difficult to be considered simultaneously.

The application belongs to the technical field of battery separator, and provides a PE material for lead-acid battery separator and a preparation method thereof.The PE material comprises the following raw materials in parts by weight: 20-24 parts of high molecular weight polyethylene, 58-76 parts of modified silicon dioxide, 10-18 parts of process oil, and 0.3-1.0 parts of antioxidant; the modified silicon dioxide is obtained by modifying the surface of silicon dioxide with diethylenetriamine and modified tannic acid.The PE material prepared by the application has high wettability, good mechanical strength and chemical stability, and meets the requirements of PE separator for lead-acid battery in practical application.

This invention discloses a PVDF nanofiber membrane with an in-situ grown strong acid cation exchange layer, its preparation method, and its applications. The preparation method includes: electrospinning to prepare the PVDF nanofiber membrane; after surface activation, in-situ polymerization of a polymer containing sulfonic acid groups (such as polystyrene sulfonic acid) onto the fiber surface. This invention fixes the ion exchange layer to the fiber surface through chemical bonding, ensuring complete exposure of all sulfonic acid groups and eliminating the risk of detachment. The lipophilic segments in the grafted polymer chains significantly improve the wettability of the membrane to organic solvents (such as PGMEA and cyclohexanone), promoting rapid diffusion of metal ions to the exchange sites. When used in semiconductor photoresists or electronic-grade organic solvents, this membrane can deeply remove trace metal ions such as sodium, iron, copper, aluminum, and zinc to below 1 ppb, exhibiting advantages such as fast adsorption rate, high removal rate, and good cycle stability. It has broad application prospects in the field of ultrapure semiconductor wet electronic chemicals.

The application discloses a kind of quaternary ammonium salt cationic surfactants and its preparation method and application in defoaming glass water, it is related to surfactant technical field.The quaternary ammonium salt cationic surfactant is prepared by the following method: bis-trimethylsiloxy methyl silane is reacted with 4-vinyl phenyl glycidyl ether to generate intermediate 1;Heptaglycol monomethyl ether is reacted with intermediate 1 to generate intermediate 2;Dodecyl dimethyl tertiary amine is reacted with 3-bromo-2,2-bis(bromomethyl) propionic acid to generate quaternary ammonium salt compound;Intermediate 2 is reacted with quaternary ammonium salt compound to generate surfactant.The surfactant prepared in the application has lower surface tension and contact angle, and shows excellent low-temperature stability and detergency.

The present invention relates to the use of at least one compound of formula (I): [R-O-(AO) n] m-B (I) wherein R, A, B, n and m are as defined in the description, as surfactants in agrochemical formulations. The invention also relates to agrochemical formulations comprising said compounds of formula (I). Formula (I) [R-O-(AO) n] m-B (I).

The present application relates to anticorrosive wear-resistant coating, and in particular to polyurea reinforced epoxy resin anticorrosive wear-resistant coating for high-speed train. The epoxy resin anticorrosive wear-resistant coating contains polyurea nanofiber, which is obtained by addition polymerization with diisocyanate and diamine as raw materials. The polyurea nanofiber has continuous reinforcing interface and high dispersibility, and can significantly enhance the corrosion resistance and wear resistance of traditional epoxy resin within a certain mass ratio range.

This invention relates to the field of solar cell technology, specifically to a hole transport layer containing betaine hydrochloride additive and its inverse wide-bandgap perovskite solar cell. The hole transport layer comprises a nickel oxide layer and a self-assembled molecular layer formed on its surface. The self-assembled molecular layer contains (4-(3,6-dimethyl-9H-carbazole-9-yl)butyl)phosphonic acid and betaine hydrochloride. The introduction of betaine hydrochloride improves the conductivity of the hole transport layer through the interaction of its carboxylic acid groups with nickel oxide, and inhibits its clustering behavior through interaction with the self-assembled molecules, thereby improving film uniformity and effectively passivating buried interface defects in the perovskite light-absorbing layer. The inverse wide-bandgap perovskite solar cell fabricated based on this hole transport layer exhibits significantly improved open-circuit voltage and fill factor, ultimately achieving a photoelectric conversion efficiency exceeding 21.7%. This invention provides an effective interface engineering strategy for fabricating efficient and stable wide-bandgap perovskite solar cells and tandem devices.