384 results about "Poly tetra fluoro ethylene" patented technology

The invention relates to a preparation method of a full-solid-state nano composite polymer electrolyte. The preparation method comprises the following steps of: mixing surface functional graphene, dissociated lithium salt and a polymer substrate and dissolving into an organic solvent, thereby obtaining a sol-like compound through ultrasonic treatment and mechanical blending; pouring on a Teflon template; and drying in a vacuum drying tank, thereby obtaining an electrolyte membrane. According to the invention, the full-solid-state nano composite polymer electrolyte is prepared through adding chemically modified graphene, not only room temperature conductivity is high, but also the surface is smooth and even, the internal components are uniform, and the full-solid-state nano composite polymer electrolyte is high in lithium ion transference number and electrochemical stability.

This invention relates to a compound proton exchange film of a high temperature proton exchange film fuel battery, characterizing that said film is a multiplayer proton exchange film composite by multiplayer multi-hole polymer intensified compound proton exchange films. The multi-hole polymer is a buck Teflon micro-hole film, which makes up of the multi-hole polymer enhanced compound proton exchange film together with the inorganic nm particles and solid poly-electrolyte fillers. The preparation method of the exchange film is: a micro- pore film is pre-processed and fastened filled by inorganic nm particles and solid poly electrolytes to be rolled to single layer multi-hole polymer intensified proton exchange film to be laminated and hot-pressed to form a multiplayer proton exchange film.

An upcoated optical fiber includes an optical fiber having a ultra-violet (UV) curable upcoating and a slip layer disposed between the optical fiber and the upcoating. The upcoating is mechanically strippable from the optical fiber and may be colored for identification of the optical fiber. In one embodiment, the slip layer and upcoating both have predetermined glass transition temperatures that are within about 15° C. of each other for improving mechanical characteristics. The slip layer may be essentially the same color as the upcoating for identification of the optical fiber after the upcoating is removed or it may be uncolored. In suitable embodiments, the slip layer may include a micronized poly-tetra-fluoro-ethylene (PTFE), a silicone, and/or a dispersing agent for enhancing the strip performance of the upcoating over a range of temperatures.

The invention relates to a photocatalytic material, and particularly relates to a preparation method of an indium sulfide/carbon nitride composite nano material. The preparation method of the indium sulfide/carbon nitride composite nano material comprises the following steps: weighing g-C3N3 powder, dissolving into purified water, carrying out ultrasonic dispersion uniformly, then adding In(NO3)3.4.5H2O, carrying out magnetic stirring until dissolving completely, dropwise adding the prepared C2H5NS solution, carrying out magnetic stirring, transferring into a reaction kettle with an inner liner made of Teflon, putting into a baking oven, and carrying out hydrothermal reaction; and cleaning and drying to obtain the indium sulfide/carbon nitride composite nano material. The method protects the environment, is efficient, simple, convenient and feasible, and the prepared In2S3/g-C3N4 composite material has a favorable application prospect in the fields of photocatalysis and the like.

The invention discloses a preparation method of a teflon hollow fiber membrane for membrane distillation, which comprises the following steps of: mixing teflon dispersion powder and a extruding-aid agent, pressing a blank, extruding the blank into a teflon hollow tube through a pushing and pressing machine with a cone mould and a mouth mould, and performing longitudinal stretch, sintering and heat setting on the teflon hollow tube in a drying oven to obtain the teflon hollow fiber membrane. The processed teflon hollow fiber membrane is in an asymmetric structure, the mean pore size of an outer layer is 0.10-1.0 micrometer, the mean pore size of an inner layer is 5.0-20 micrometers, the wall thickness is 0.1-0.5 millimeter, the bubble point pressure is 0.5-2.0 kgf/square centimeter, and the water resistance pressure is 1.5-6kgf/square micrometer. The invention is mainly used for the membrane distillation separation process, and can be applied to the fields of sea water desalination, industrial wastewater treatment, cryoconcentration of food and biological products, and the like.

The invention discloses a process for manufacturing printed circuit boards having high-frequency and low-frequency mixed board structures, which includes steps of A) cutting high-frequency boards and low-frequency boards, manufacturing inner patterns, performing brownification, pressing, removing liquid adhesives and drilling holes; B) removing adhesives by plasmas, plating copper outside the high-frequency and low-frequency pressed board with drilled holes and electroplating the integral pressed board; C) forming outer patterns; D) printing solder mask and texts after solder mask of plug holes in a screen manner; E) printing characters after plating the integral board with nickel and gold and forming a circuit board in a screen manner; and F) testing and detecting electric performance and appearance of a finished board and manufacturing the finished product. By the design of the high-frequency and low-frequency mixed press structure, a necessary layer can be made of high-frequency boards with PTFE (poly tetra fluoro ethylene) structures so as to guarantee high speed and undistorted transmission of signals and the requirement of impedance matching, and other signal layers can be made of common boards with epoxy resin substrates on the condition of meeting the requirements of the integral performance, and cost is saved for clients by optimized combination.

The invention discloses a microbial fuel cell air cathode which is composed of a diffusion layer thin film, a stainless steel net and an active layer thin film in an overlapped mode from an air side to an electrolyte side. The preparation method comprises the following steps of: mixing a carbon powder material which has good electrical conductivity and is hydrophilic and PTFE (Poly tetra fluoro ethylene) emulsion which is hydrophobic and is air conductive in ethanol; clustering through ultrasound and water bath; and finally rolling into a thin-film-shaped diffusion layer and an active layer; with the stainless steel net as an electrical conductive framework, overlapping and rolling so as to form the air cathode. The microbial fuel cell air cathode and the preparation method thereof have the following advantages: according to the preparation method, since electrical conductive carbon black is added into the air diffusion layer, the resistance of an air diffusion electrode is reduced; since the ultrasound stirring is carried out after the PTFE emulsion is dropped in, uniform and fine air holes can be formed in the electrode and the three-phase interface reduction site in the active layer is increased; and heating and curing are carried out twice in a muffle furnace, thus PTFE forms an air conveying pore canal of a three-dimensional network structure, the three-phase interface in the active layer is increased, and the microbial fuel cell air cathode is applicable to normalized mass production.

The invention relates to polyether ether-ketone wear-resisting compound material which is strengthened by titanium base crystal as well as preparative method. The mentioned titanium base crystal has a diameter of 0.5-3.0 mum, length-diameter ratio of 5-50 and its surface reshaped. The ingredient of the compound material includes titanium base crystal, polytef and PEEK, it's shaped by hot mould pressing or pouring so it has very good strength, and abradability. Compared to the carbon fiber strengthened polyether ether-ketone of the same content, the abradability of the invention has been increased by 10 times, the frictional coefficient has been decreased by 30% and the temperature of the friction surface has been lowered by half. The invention has very good alkali resistance, so it is adaptable to be the ware and wear-resisting material in lye; it's also applicable to special conditions such as high temperature, vacuum, radiation and causticity; it can be widely used as piston link, filling, sliding piece and valve piece, the service life of the material in the invention has been greatly prolonged.

During the preparation of composite aramid fiber/polyimide material, aramid fiber is first surface modified via gamma-ray irradiation of dosage 300-500 kGy in nitrogen atmosphere to raise surface activity; the surface modified aramid fiber, additive polyimide powder, PTEF and graphite are then airflow crushed and mixed in an air flow crusher of air pressure 4-6 MPa; the mixture powder is hot pressing molded at 200-240 deg.c and 16-23 MPa for 0.5-1 hr. Thus prepared composite aramid fiber/polymide material has excellent mechanical performance and friction performance and may be used in the structural part and friction part in aeronautic and astronautic fields.

A lithiated molybdenum trioxide nanometer belt electrode material and its the lithiation modification method, its characteristic is that: put molybdenum trioxide nanometer belt in deionized water to conduct supersonic dispersing, then add lithium salt powder to make the mole ratio of molybdenum element and lithium element be 1: 3 to 1: 10; stir; move the obtained suspension liquid into the stainless reaction pot with poly-tetre-fluro-ethylene substrate to conduct hydrothermo reaction; cool and filter the hydrothermo product and wash the product by deionized water to obtain the molybdenum trioxide nanometer belt.

The invention discloses a polyurethane resin prepolymer solution which is prepared from the following raw materials in parts by weight: 5-10 parts of hydroxyl-terminated fluoropolysiloxane, 20-30 parts of toluene diisocynate (TDI), 20-30 parts of polyester polyol, 1-5 parts of ethylene glycol (EG), 20-30 parts of dimethylformamide (DMF), 20-25 parts of toluene, 3-5 parts of acetone and 1-2 parts of organic tin catalyst. The invention also discloses an artificial leather fog washing bright finishing agent prepared by using the polyurethane resin prepolymer solution. The finishing agent is prepared from the following raw materials in parts by weight: 20-60 parts of the fluoropolysiloxane modified polyurethane resin prepolymer solution, 2-10 parts of Teflon wax powder, 2-10 parts of precipitated silica or fumed silica, 10-30 parts of dimethylformamide and 20-30 parts of toluene.

The invention provides a preparation method of a compact and composite proton exchange membrane, comprising the following steps of: dissolving perfluorinated sulfonic acid resin in alcohol aqueous solution of low boiling point; preparing to form perfluorinated sulfonic acid resin solution; then, adding solvent of high boiling point to replace solvent of low boiling point; adding water-retaining substance, such as SiO2, heteropolyacid and the like; impregnating mixed solution of alcohol of low boiling point and solvent of high boiling point in advance by a processed PTFE (Poly Tetra Fluoro Ethylene) porous basement membrane firstly; then, evenly dipping resin solution added with water retention substance onto the surface of the PTFE porous basement membrane; heating evaporating solvent andcarrying out heat treatment to obtain the composite proton exchange membrane; and rolling in to obtain the compact and composite proton exchange membrane. The preparation method is simple to operate,the composite membrane has the advantages of controllable thickness, good mechanical strength and water-retaining property, good size stability and compactness, is easy to realize large-scale production and can be used for improving the stability, the service life and the specific power of the battery if being applied to a fuel battery proton exchange membrane.

The reformable soft gasket consists of chloroprene rubber 2-10 wt%, teflon emulsion 50-84 wt%, silk floss or polymer fiber 3-20 wt%, reinforcing stuffing 0.5-5 wt%, lubricating oil 10-20 wt%, plasticizer 0.5-3 wt% and graphite 0-24 w. The gasket of the present invention has the features of excellent sealing performance, high durability, low friction coefficient, no need of water cooling, good self-lubricating performance, no wear of shaft and muff, power saving, corrosion resistance, capacity of being reused, etc.

The invention relates to structural elements represented by constitutional formula (I) and (II), which is linear macromolecular luminescent material in linear random arrangement by the mol ration of 1 : 0.5 - 1:200 and molecular weight 20000-100000 containing 8-hydroxyquinoline metallic complex, the preparation comprises copolymerizing polyalkene monomer of 8hydroxyquinoline metallic complex containing a polymerisable functional group with polyalkenes monomers through initiating agent at 20-200 deg. C.

The invention relates to a method of making carbon electrode of fluid electric-absorption desalter. It mainly mixes high specific surface area electrode carbon, nano carbon tube absorption material, carbon fiber, and nano carbon tube conductive material as well as adhesive polytetrafluoroethylene in a certain proportion and in a certain mode to make cold press molding and makes them into a double-faced electrode with a collector interlaid; the carbon electrode has good electric conductivity, small resistance, large electric capacity and low energy consumption; in addition, the modified carbon electrode has larger specific surface area and mesoporous porosity, therefore able to increase the absorption quantity of electrode to salt ions. The carbon electrode is especially applied to the fluid electric-absorption desalter and has higher desalting efficiency.

The invention relates to a method for preparing copper oxide based on an acidic etching liquid as a raw material. The method comprises the following steps: (1) regulating the pH of the acidic etching liquid to 10-13 with sodium hydroxide or potassium hydroxide; (2) transferring the etching liquid obtained in the step (1) into a stainless steel reaction kettle with a teflon lining, adding pure water to 70%-80% of total kettle volume, and carrying out hydrothermal synthesis for 2-10 hours at the temperature of 120-200 DEG C; and (3) after the reaction is finished, naturally cooling to room temperature, collecting materials at the kettle bottom, and successively washing with deionized water and alcohol, and then drying so as to obtain copper oxide. According to the invention, copper oxide isprepared from the acidic etching liquid by using the hydrothermal synthesis method, and obtained copper oxide has the advantages of high purity, high activity and uniform particle diameter. In addition, the method has no secondary pollution and low production cost.

The process of modifying surface hydrophilicity of separating fluoric polymer film includes the first pre-irradiating separating fluoric polymer film with high energy ray to make the surface macromolecular main chain generate active free radical, and the subsequent grafting the surface fluoric polymer film with high ionized hydrophilic sulfonic group in the grafting polymerization reaction system with double monomer of acrylic cid and sodium styrene sulfonate and water as dispersing medium in controlled reactant concentration, molar ratio, temperature and pH value. The process can improve the hydrophilicity of separating fluoric polymer film obviously, and the modified separating membrane has obviously decreased contact angle and lasting hydrophilicity.

Some variations provide a low-adhesion coating comprising a continuous matrix containing a first component, a plurality of inclusions containing a second component, and a solid-state lubricant distributed within the coating, wherein one of the first component or the second component is a low-surface-energy polymer, and the other of the first component or the second component is a hygroscopic material. The solid-state lubricant may be selected from graphite, graphene, molybdenum disulfide, tungsten disulfide, hexagonal boron nitride, or poly(tetrafluoroethylene) or other fluoropolymers. The solid-state lubricant particles may be coated with a metal selected from cadmium, lead, tin, zinc, copper, nickel, or alloys containing one or more of these metals. The solid-state lubricant is typically characterized by an average particle size from about 0.1 μm to about 500 μm. The solid-state lubricant is preferably distributed throughout the coating.

The invention belongs to the technical field of nano-material synthesis, relates to a method for preparing microspheres having uniform morphology by a solvothermal method, and especially relates to a method for preparing multi-tunnel cobaltosic oxide flower-like microspheres by a solvothermal method. The method comprises the following steps of uniformly mixing cobalt nitrate, copper nitrate, ethylene glycol and ammonia water, transferring the mixture to a reactor with a Teflon lining, carrying out a high-temperature solvothermal reaction process, carrying out centrifugal separation, washing and vacuum drying of solvothermal reaction products, and carrying out calcination in a tubular furnace. The method utilizes ethylene glycol as a solvent and utilizes a solvothermal method to prepare a cobaltosic oxide material having a high yield and uniform morphology. The multi-tunnel cobaltosic oxide flower-like microspheres prepared by the method have good chemical stability and can be used for preparing an electrode material and a hydrogen production material of a storage battery. The method has simple processes and good reappearance and utilizes a cobalt inorganic compound as a cobalt source, wherein the cobalt inorganic compound has a low cost, can be acquired easily and satisfies environmental requirements. The method avoids pre-treatment processes such as aging, allows a low synthesis temperature, reduces energy consumption and a reaction cost, and is convenient for volume production.

The invention relates to a dustproof plastic capable of being used for manufacturing appearance parts and a preparation method thereof. The dustproof plastic comprises the following components in parts by weight: 100 parts of matrix resin, 2-10 parts of PTFE (Poly Tetra Fluoro Ethylene) micro-powder, 0.01-0.3 part of an amide smoothing agent, 0.1-2.0 parts of a lubricant, and 0.1-1.0 part of an antioxidant. The preparation method comprises the following steps: stirring and mixing the raw materials in a high-speed mixer, feeding the obtained mixture into a twin-screw extruder, and under the conditions that the obtained mixture is conveyed, sheared and mixed by screws, melting and compositing an obtained material, and then extruding, bracing, cooling, cutting and pelletizing the obtained product so as to obtain a spray-free aesthetic resin for improving appearances. Compared with the prior art, the dustproof plastic disclosed by the invention can effectively overcome a defect that dust is easily deposited on the surface of a plastic, so that plastic products can be widely applied to appearance parts of various home appliances and automobile products. The dustproof plastic capable of being used for manufacturing appearance parts and preparation method thereof disclosed by the invention provide a technical support for the production of engineering plastic products which have relatively high performances and can be used for manufacturing appearance parts.