330 results about "Caprylic/Capric Acid" patented technology

The invention discloses a preparation method of fluorine-containing polymer. The fluorine-containing polymer is obtained through the emulsion polymerization of fluorine-containing olefins monomer in the aqueous medium of fluorine-containing surfactant under the existence of initiator, wherein the weight percentage concentration of the fluorine-containing surfactant in the aqueous medium is 0.01-1%, the weight percentage concentration of the initiator in the aqueous medium is 0.001-1%, the reaction temperature is 10-120 DEG C and the pressure is 1-6.5MPa, and the reaction time is 3-15hours. The fluorine-containing surfactant satisfies a general formula shown in the specifications, wherein a is equal to 0 or 1; b is equal to 1 or 2; c is equal to 1, 2 or 3; d is equal to 1 or 2; X is C1, F or CF3; Y is H, F or CF3; and M is carboxylate or sulphonate. According to the method, perfluoro caprylic acid and derivatives thereof are not used in the method, so the method is environment-friendly; the preparation process can be conducted under wild temperature and pressure condition without affecting the reaction ratio of the polyreaction; and polymer powder with multiple grain sizes can be obtained, and thereby fluorine-containing polymer products at various grades can be prepared.

The invention relates to a process for preparing human immunoglobulin for intravenous injection, and belongs to the field of biological pharmacy. The precipitate of components II and III in the process for preparing the human immunoglobulin for intravenous injection is treated by a caprylic acid and calcium chloride precipitation method, miscellaneous proteins are removed from the precipitate of the components II and III, and two-step chromatography is performed. Compared with the general caprylic acid precipitation method, the process has the advantages that various blood coagulation factors are effectively removed from a precipitate solution of the components II and III by adding calcium chloride, the stability of the immunoglobulin is improved, and the yield of the product is obviously improved, namely more than 7g of immunoglobulin can be prepared from each liter of blood plasma; upper column chromatographic purification is performed by two ion exchange columns and a chromatographic technology, so that the miscellaneous proteins can be effectively removed, and the purity of the product is over 99.5 percent; and in addition, caprylic acid is added, and viruses are removed and filtered by a DV20 filter element, so that a virus removing effect can be obviously improved, and the safety of clinical medication is improved.

Provided are a super amphiphilic molecule emulsifier with responsiveness and an emulsion and a preparation method thereof. The emulsifier is prepared from polyetheramine and long-chain fatty acid, and every 100 parts of the emulsion is prepared from, by weight, 49.5-80 parts of aqueous phase, 1-3 parts of the emulsifier and the balance oil phase. Polyetheramine and long-chain fatty acid are mixed to serve as the emulsifier, the emulsifier, the aqueous phase and the oil phase are mixed and stirred to be uniform, and the emulsion is formed. A demulsification method of the emulsion comprises the steps that CO2 is fed into the emulsion, or acid or n-caprylic acid or n-hexylic acid are dropwise added into the emulsion, and standing is conducted after shaking is conducted. The emulsifier has the good pH value or CO2 responsiveness; on one hand, the emulsion stabilized through the emulsifier has long-term stability; on the other hand, the pH value is adjusted by adding the acid or feeding CO2, so that rapid inactivation of the emulsifier is achieved, emulsion demulsification is achieved, the cost is low, and the adaptability is wider.

The invention relates to a weather resistant epoxy-polyurethane anti-corrosion coating and a manufacturing method thereof, which adds phenol-A epoxy resin, bisphenol-F epoxy resin, hydroxyl contained saturated polyester resin and fluorocarbon resin into the mixed solvent of dimethylbenzene, n-butyl acetate, methyl isobutyl ketone and butanone; then adds rutile type titanium pigment, saponite, sericite in powder, polyacrylate co-polymer, polymethyl alkyl siloxane, benzotriazole, gas phase silica and iso-caprylic acid znic to make the fluid A of the weather resistant epoxy-polyurethane anti-corrosion coating while adds fatty group polyisocyanate into the mixed liquor of anhydro-dimethylbenzene and the n-butyl acetate to make fluid B, and mix the two components during application. The invention can be applied to the preservation of the surfaces of outdoor steel structures, pipes and concrete requiring weather resistance, light aging resistance and acid, alkali and salt corrosion resistance.

The invention discloses a low-energy health chocolate and an industrial production method thereof. The chocolate comprises the following materials by weight percent: 5-10 percent of flavor component, 8-10 percent of cocoa butter, 20-30 percent of low-energy cocoa butter, 40-50 percent of low-energy sweetener, 0.5-1.0 percent of emulsifying agent and 3-10 percent of no-energy filling agent; the low-energy cocoa butter can be prepared by the following method: under the condition of 60-80 DEG C, adding caprylic acid or decylic acid and behenic acid into the cocoa butter, adding lipase with the mass equal to that of total substrate, under the stirring speed of 100-200r / min, reacting for 6-12 hours under the action of enzymatic and catalytic ester exchange, filtering to remove enzyme and obtain crude oil, and carrying out molecular distillation, refining and deacidification on the crude oil to obtain the low-energy cocoa butter; and the preparation method comprises the steps of mixing, accurate grinding, refining, temperature adjusting, forming and the like. The low-energy health chocolate realizes sugar free, low sweetness, high fibrosis and low energy.

The present invention relates to the use of medium chain fatty acids (MCFA), chosen from the group consisting of caproic acid (C6), caprylic acid (C8) and capric acid (C10), salts, derivatives or mixtures thereof, in a total amount by weight comprised between 0.01% and 5% for inhibiting the growth of microbial pathogens.

A pest-combating composition including sodium lauryl sulfate and one or more of C6-12 fatty acids, preferably lauric and / or capric and / or caprylic acid, soy methyl ester, and 2-undecanone, and methods of combating pests utilizing same, are disclosed. The compositions can include a carrier oil such as silicon oil, soy methyl ester, or a vegetable oil, and can be in the form of an emulsion. The composition may be constituted as a spray composition, an aerosol, a lotion, a paste, or another compositional form. Pests that may be usefully combated with such composition include flying insects, including flies, mosquitoes, and wasps, ants, including arthropods such as fire ants, ticks, fleas, cockroaches, silver fish, thrips, gnats, aphids, Japanese beetles, and agricultural and horticultural arthropods and insects including beetles (potato and bean), flea beetles, fleahoppers, squash bugs, slugs, leaf hoppers, harlequin bugs, milk weed bugs, spiders, mites, lice, rodents, and deer.

The invention discloses a totally-synthesized water-based stainless steel cutting liquid. The cutting liquid contains the following components: a stainless steel water-based extreme-pressure agent, caprylic-capric acid, boric acid triethanolamine ester, polyethylene glycol, a cation quaternary ammonium salt metal filings settling agent, a dicarboxylic compound antirusting agent, a monobutyl ether coupling agent, a hard-water-resisting agent, a defoamer and distilled water. By virtue of an environmental-friendly total-synthesis formula, the cleaning and settling properties of the cutting liquid are enhanced; an environmental-friendly special water-based extreme-pressure lubricant is used to substitute for the traditional synthetic ester, thereby ensuring the long-time stability of the cleaning and settling properties of the cutting liquid. The cutting liquid plays a very good role in protecting non-ferrous metal and ferrous metal; by virtue of the cation quaternary ammonium salt settling agent, the problem of iron filings settling during the processing of stainless steel is eliminated, and the transparency and stability of the cutting liquid in long-time use are guaranteed.

The invention relates to a method for preparing a fluorine-containing polymer by using a mixed fluorine-containing surfactant. The method comprises the following steps of: performing homopolymerization or copolymerization by using a fluorine-containing olefin monomer or performing copolymerization on the fluorine-containing olefin monomer and the fluorine-fee olefin monomer under the effect of an initiator; adding 0.01-1% of mixed fluorine-containing surfactant to the reaction system, wherein the fluorine-containing surfactant is combined by a molecular weight fluorine-containing surfactant [Rf-(O)m-Rf'-COO]nAn+ and high molecular fluorine-containing surfactant [CF2=CF-(O)p-Rf1-(O)q-Rf2-COO]nAn+ containing unsaturated bonds. Without perfluoro caprylic acid as a dispersant, the method is high in safety and easy to control polymerization conditions, so that the environmental pollution by perfluoro caprylic acid is avoided, and the product system is good in stability and uniform in grain shape.

Process for preparing a purified immunoglobulin preparation. The process comprises the steps of subjecting a crude immunoglobulin solution to caprylic acid treatment, removing protein aggregates and viruses from the immunoglobulin solution, subjecting the immunoglobulin solution to anion exchange chromatography in order to purify the immunoglobulin, filtering the immunoglobulin solution thus obtained on a virus-removal filter to produce an eluate containing immunoglobulin, and recovering the immunoglobulin. By combining caprylic acid treatment and precipitation with a protein precipitant the level of aggregated proteins and viruses is effectively reduced and a truly virus safe preparation is provided after filtration.

The invention discloses a preparation method of a pharmaceutical intermediate, i.e., sodium 8-[(2-hydroxybenzoyl) amino] octanoate. The preparation method comprises the steps of enabling salicylamide,used as a raw material, to react with N' N-carbonyl diimidazole so as to generate an intermediate, i.e., 2H-benzo[e][1,3]oxazine-2, 4 (3H)-dione; enabling the intermediate to react with 8-ethyl bromooctanoate to obtain 8-(2, 4-dicarbonyl-2H-benzo[e][1, 3]oxazine-3(4H)-yl) ethyl caprylate; hydrolyzing by using sodium hydroxide, and then acidizing to obtain 8-[(2-hydroxybenzoyl) amino] caprylic acid; then, enabling the 8-[(2-hydroxybenzoyl) amino] caprylic acid to react with sodium hydroxide to obtain the final product, i.e., the sodium 8-[(2-hydroxybenzoyl) amino] octanoate. The preparation method avoids the use of a genotoxic raw material-ethyl chloroformate, is low in reaction energy consumption, less in by-products and high in yield, greatly lowers the production cost, and is simple inprocess and suitable for industrial production.

The invention provides an aluminium wiredrawing lubricant and a preparation method thereof. The lubricant is characterized by comprising the following raw materials by weight parts: 0.3-0.4 parts of monoethanolamine, 0.6-0.8 parts of triethanolamine, 0.2-0.3 parts of mercapto benzimidazole, 1-2 parts of caprylic-capric acid blend, 1-2 parts of sodium dodecyl sulfate, 1-2 parts of dibutyltin dilaurate, 1-2 parts of zinc acetate, 1-2 parts of tung oil, 2-3 parts of methyl trimethoxy silane, 3-4 parts of a film forming auxiliary agent and 150-160 parts of water. According to the invention, the tung oil is added to promote lubricity, water base is used to play a relatively good heat dissipating effect, the triethanolamine is added to improve an anti-corrosion effect, and the methyl trimethoxy silane is combined with the mercapto benzimidazole, the caprylic-capric acid blend and the film forming agent to improve a film forming performance and prolong an anti-corrosion time of the aluminium conductor after the wiredrawing.

The invention discloses a technology for preparing hepatitis B human immunoglobulin for intravenous injection. The protein is purified through caprylic acid precipitation and chromatography, and meanwhile viruses are removed through the S / D inactivation method and DV50 nanometer films. Compared with a traditional technology, the technology for preparing hepatitis B human immunoglobulin for intravenous injection is high in yield, purity and virus removal rate, safer and more effective.

The invention discloses a preparation method of porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes and a method for using the porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes for degrading and mineralizing perfluoro caprylic acid in water, and belongs to the technical field of electrochemistry. Waste water containing perfluoro caprylic acid is subjected to electrolytic oxidation treatment by using the porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes as anodes and Ti or 304 stainless steel as cathodes. The method is characterized in that the perfluoro caprylic acid can be efficiently mineralized under the mild condition. An electrochemical oxidation method is adopted, the technical flow process is simple, the operation is convenient, the reaction condition is mild, the treatment effect is good, in addition, stability and reliability are realized, and the industrial application is easy to realize. The adopted porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes have the advantages that the oxidation capacity is high, the service life is long, the processing is easy, the cost is low, and the like.

The invention relates to an antioxidant network efficacy nanoemulsion externally used for skin and a preparation method thereof. The nanoemulsion consists of the following raw materials according to weight mixture ratio: 1.0-1.5 of vitamin E, 2.0-3.0 of glutathione, 2.0-2.5 of L-ascorbic acid-2-heteroside, 1.0-1.8 of seabuckthorn oil, 1.0-1.6 of coenzyme Q10, 0.5-0.6 of alpha-lipoic acid, 8.0-10 of isopropyl myristate, 20-25 of caprylic acid capric acid polyethylene glycol glyceride, 7.0-9.0 of polyglyceryl fatty acid ester, 0.5-1.0 of azone, 46-50 of triple distilled water, 0.05-0.25 of citric acid and 1.0-1.6 of sodium citrate. The functional ingredients in the formula can form an antioxidant network system with cooperative interaction, synergy and regeneration, and the penetrating function of a nanoemulsion carrier system greatly enhances the antioxidant function and effect of the functional ingredients. The preparation method can enhance the stability and effectiveness of antioxidant, is simple in preparation technology and easy for scale production, needs no extra energy, saves time, energy and raw materials and is beneficial to environment protection.

The invention discloses a gas-phase rust-preventing aerosol and a preparation process thereof. The formula of the gas-phase rust-preventing aerosol comprises the following components in parts by mass: 0.5-1.5 parts of caprylic acid tributylamine, 1-3 parts of benzotriazole tributylamine, 2.5-3.5 parts of oleic acid, 1-3 parts of laurinol, 0.2-0.8 part of amino silicon oil, 2.5-3.5 parts of methyl oleate, 0.2-0.8 part of sodium petroleum sulfonate, 0.2-0.8 part of barium petroleum sulfonate, 0.5-1.5 parts of capric acid tributylamine, 51.5-61.5 parts of 20# machine oil and 27-33 parts of liquefied petroleum gas. The process comprises the following steps: mixing and stirring the raw materials; filling the obtained liquid into a spray can; inserting a capillary valve; filling the liquefied petroleum gas; performing leak detection, and blowing-dry; and boxing, and warehousing. The invention has the characteristics of small aerosol particle diameter and high aerosol particle uniformity DR, and can effectively enhance the corrosion inhibition effect of a metal component.

The invention discloses a method for extracting chicken egg yolk antibodies against infectious bursal disease, which comprises the following steps of: taking an immune egg yolk, breaking the immune egg yolk, and purifying by respectively adopting acetic acid-sodium acetate buffer solution, octylic acid solution and ammonium sulfate; and filtering by using a filter membrane to obtain the egg yolk antibodies. In the method for extracting the chicken egg yolk antibodies against the infectious bursal disease, the acetic acid-sodium acetate buffer solution, the octylic acid solution and the ammonium sulfate are respectively adopted for purification, and the filter membrane is adopted for filtration finally, so the loss of the antibodies and the damage to the antibodies are reduced, and the productivity of the egg yolk antibodies is improved; and the method has the advantages of simple operation, and convenient production, promotion and application.

The invention provides a method for producing fatty acid. The method comprises the following steps of: thermally cracking and gasifying biomass to generate synthesis gas; and then providing a hollow fiber membrane as an attaching vector and in-situ gas supplying device and adopting the synthesis gas as a raw material to produce the fatty acid in an anaerobic fermentation manner. The invention also provides a device for producing the fatty acid. According to the method and device, the hollow fiber membrane is adopted and used as an attaching medium of microorganism, thus microorganism loss can be reduced; hollow fiber membrane silks are adopted and used for providing the synthesis gas in situ, thus, the mass transfer efficiency of the synthesis gas diffusing to the microorganism, as well as the utilization rate of the synthesis gas, can be improved. By adopting a reactor system and the method, enriched microorganism utilizing the synthesis gas can be gained within a shorter time, and thus the fatty acid, in particular medium-and long-chain fatty acid such as caproic acid and caprylic acid, can be produced.

The invention discloses a method for preparing a bivalent yolk antibody for preventing and treating duck virus hepatitis I and III. The bivalent yolk antibody can be used for effectively preventing and treating the duck virus hepatitis I and III single and mixed infection and solving the problems that the existing vaccines, serum antibodies and yolk antibodies are not effective to the mixed infection. In addition, the bivalent yolk antibody is extracted by adopting a caprylic acid precipitation method. The method is safe, low in cost and suitable for mass production. The prepared bivalent yolk antibody has high purity and high titer, is stable in nature and is easy for storage.

The invention discloses full-synthetic water-based high-silicon aluminum alloy cutting fluid and a preparation method and an application method thereof. The cutting fluid is made from aluminum protectant, caprylic-capric acid blend, water-based extreme-pressure lubricant, boric acid, glycerol, cationic quaternary ammonium aluminum scrape settling agent, triethanolamine, dicarboxylate-based compound rust inhibitor, monobutyl ether coupler, hard water resister, defoamer, and distilled water. By using an environment-friendly full synthesis formula, cleaning and settling performances of the cutting fluid are enhanced. The environment-friendly special water-based extreme-pressure lubricant replaces traditional synthetic esters, and accordingly lubricating performance and cleaning performance of the cutting fluid are guaranteed to be stable for a long period of time. The cutting fluid also protects well nonferrous metals and ferrous metals. The environment-friendly aluminum protectant is used, and accordingly surface corrosion of aluminum material in processing of high-silicon aluminum alloy is avoided.

The invention provides a repairing eye cream with an anti-blue-light effect and a preparation method thereof. The repairing eye cream with the anti-blue-light effect is prepared from the following functional components of glycerol, butanediol, EDTA disodium, avocado butter, cetostearyl alcohol, isopropyl myristate, bis-PEG-18 methyl ether dimethyl silane, neopentyl glycol dicaprylate, DC9040 silicon elastomers, a MONTANOV68 emulsifier, a thickening agent SEPINOVEMT10, an emulsifying agent SIMULSOL165 and deionized water, wherein the functional components comprise xanthophyll, a bifidus yeast fermentation product spore lysate, acetyl hexapeptide-8, acetyl tetrapeptide-5, palmitoyl pentapeptide-4, a cocoa seed extract, nicotinamide, a centella asiatica extract, borneol, zinc carbonate hydroxide, amber powder, pearl powder, borax, tocopheryl acetate, glucosyl hesperidin, allantoin and fullerene. The repairing eye cream with the anti-blue-light effect not only has the effect of resisting blue light invasion, but also has the repairing effect, and is high in application prospect.

The invention discloses a technology for preparing a zinc super-hydrophobic surface. The preparation method comprises the following steps: chemically etching a zinc sheet by virtue of hydrochloric acid to form a spherical rough structure on the surface of the zinc sheet; then, performing hydrothermal reaction to form a layer of uniform rod-shaped structure which is close to nanoscale on the surface of the spherical rough structure, wherein the rod-shaped structure is almost vertical to the surface of the zinc sheet; and finally, carrying out low-energy modification by using an absolute ethyl alcohol solution of perfluoro caprylic acid to obtain the super-hydrophobic surface with good lipophobicity. According to the preparation method, distilled water drops onto the chemically-modified zinc sheet surface to carry out contact angle measurement, wherein a contact angle of the zinc sheet surface and water is greater than 150 degrees, and a rolling angle is smaller than 10 degrees; and moreover, the surface has relatively good lipophobicity, and has a contact angle of 145.62 degrees with peanut oil.

The invention belongs to the technical field of food additives, in particular to anticorrosive food emulsifier glycerin fatty acid ester and a preparation method thereof. The glycerin fatty acid ester is prepared by the following method: esterifying glycerin and A, B and C three kinds of fatty acid serving as raw materials in the presence of an alkaline catalyst, wherein the fatty acid A is propionic acid, the fatty acid B is caprylic acid or capric acid or octyl and decyl acid, and the fatty acid C is lauric acid. The glycerin fatty acid ester after the fatty acid and the glycerin are esterified by certain technology has good anticorrosive effect after being, and has better anticorrosive performance than a product esterified by the single fatty acid and the glycerin. The glycerin fatty acid ester not only can prevent products from deteriorating, but also has the functions of improving quality of the products, delaying the ageing of starch, improving mouthfeel and the like and has superior anticorrosive performance when added into flour food and meat food.

The invention relates to an antibiotic-substituting medium and short chain fatty acid essential oil preparation and a preparation method and application thereof. The antibiotic-substituting medium andshort chain fatty acid essential oil preparation is mainly prepared from the following raw materials in parts by weight: 5-20 parts of formic acid, 5-20 parts of butyric acid, 1-5 parts of hexanoic acid, 1-5 parts of caprylic acid, 1-5 parts of capric acid, 5-20 parts of lauric acid, 3-10 parts of ammonia gas, 5-15 parts of glycerinum, 1-5 parts of origanum oil, and 20-40 parts of silicon dioxide. The antibiotic-substituting medium and short chain fatty acid essential oil preparation can substitute antibiotic to play good effects of sterilization and bacteriostasis so as to promote animal growing, and does not pollute the environment; and the invention further discloses the preparation method of the antibiotic-substituting medium and short chain fatty acid essential oil preparation, and the antibiotic-substituting medium and short chain fatty acid essential oil preparation is further applied as a pig feed additive and thus can be widely applied to the field of animal feed additives.

The invention relates to a preparation method of a liquid carbon dioxide thickening agent for unconventional oil and gas reservoir development, and can solve the problem of damage to an oil and gas reservoir in a conventional mining mode. The preparation method has the technical scheme that methylbenzene and water are added into a bottle; then, serinol is added; terbutyloxycarbonyl anhydride is dropwise added at 0 DEG C; reaction is performed for 4h at 25 DEG C; distillation is performed to obtain an intermediate product (1); then, perfluoro caprylic acid is added into another bottle; thionyl chloride and N,N-dimethyl formamide are added at 75 DEG C; reaction is performed for 2h; distillation is performed to obtain an intermediate product (2); next, the intermediate product (1) is added into another bottle; the temperature is raised to 75 DEG C; the intermediate product (2) is dropwise added; reaction is performed for 12h at 75 DEG C to obtain an intermediate product (3); finally, dichloromethane and trifluoroacetic acid are added into the bottle; then, the intermediate product (3) is added; reaction is performed for 2h at 25 DEG C; after extraction and vacuum drying, hexamethylene diisocyanate is added to perform reaction for 2 minutes; a final product is obtained. The thickening agent can increase the carbon dioxide viscosity, and can be used for fracturing reformation.

The invention discloses regenerating nourishing anti-wrinkle eye cream, and belongs to the technical field of daily use chemical skin care products. The regenerating nourishing anti-wrinkle eye cream is characterized in that a water-in-oil emulsifying system is matched with nourishing moisture retention components such as jojoba oil, cyclopentasiloxane, decyl silicon oil, isononyl ester, caprylic acid / capric triglyceride, glycerol, 1, 3 butanediol, xylitol glucoside, sodium hyaluronate, hydrogenated lecithin and vitamin E, components such as red maple bark extract, white rose garden eggplant flower extract and monkey bread flower extract are added, eye skins are nourished by the composition, eye skin elasticity can be obviously increased, fine wrinkles are decreased, eye skin aging can be delayed, and nourishing anti-wrinkle effects can be achieved.

The invention discloses a preparing method of a super-amphiphobic surface with scale preventing performance, relates to a preparing technology of the super-amphiphobic surface, and belongs to the field of metal material surface modification. The preparing method is a method for preparing a super-amphiphobic copper-zinc alloy layer on the surface of rolled steel. According to the preparing method, rolled steel serves as a substrate, firstly, a copper-zinc alloy layer is electrically deposited on the surface of the rolled steel, then a sample with the surface covered with the copper-zinc alloy layer is immersed in a beaker containing a mixed solution of potassium hydroxide and ammonium persulfate, and the beaker is placed in a water bath at a certain temperature to be insulated for corresponding time; and then at the room temperature, the treated steel sample is immersed in a perfluoro caprylic acid absolute ethyl alcohol solution with a certain concentration for several hours, and then the treated steel sample is taken out to be aired at the room temperature so that the super-amphiphobic surface can be obtained. The contact angle between the super-amphiphobic surface obtained through the method and water and the contact angle between the super-amphiphobic surface obtained through the method and glycerin both exceed 150 degrees, and the rolling angle between the super-amphiphobic surface obtained through the method and water and the rolling angle between the super-amphiphobic surface obtained through the method and glycerin are both smaller than 5 degrees. The scaling appearance of the super-amphiphobic sample in a mixed solution composed of CaCl2 and NaHCO3 is in a needle shape and is similar to an aragonite structure, and the super-amphiphobic sample has good scale preventing performance compared with a rhomb calcite structure on the surface of a steel base body.

The invention relates to a preparation method of a lithium ion battery ceramic composite membrane, and belongs to the technical field of battery membranes. In order to solve the problems that the binding force between a ceramic layer and a base membrane of a ceramic composite membrane prepared at present is relatively weak and the ceramic layer is easy to fall off, the preparation method of the lithium ion battery ceramic composite membrane provided by the invention comprises the following steps: preparing superfine aluminum oxide through a method for hydrolyzing aluminum isopropoxide, ball-milling the superfine aluminum oxide with sizing agent with dispersing agent polyacrylic acid, deforming agent n-caprylic acid, surfactant polyether modified silicone, binder polyvinyl alcohol solution and plasticizer polyethylene glycol, configuring into a sizing agent, coating the sizing agent on a polyethylene film, and spraying polyvinylidene fluoride onto the ceramic layer with an electrostatic spraying method so as to prepare the ceramic composite membrane of a sandwich structure. A ceramic particle layer is restricted between the polyethylene film and the polyvinylidene fluoride film, so that the falling of ceramic particles is effectively avoided.

The invention discloses a preparation method for a special fluoroether oligomer which is obtained by carrying out a photochemical polymerization reaction on a special fluorine-containing monomer mixture. The obtained fluoroether oligomer has many previously unimagined valuable applications. The fluoroether oligomer with the average molecular weight of 300-1500, the viscosity of about 1-20 cPs at 25 DEG C and the acidic value of about 70-100 is suitable for being used as a fluoroether surfactant and further can be used as a perfluoro caprylic acid substituent. The fluoroether oligomer with the average molecular weight over 1500 and the viscosity of about 20-500 cPs at 25 DEG C is further suitable for important applications of being processed as fluoroether oil and high-temperature-resistant lubricating oil and the like. The products or mixture thereof can be further used as an auxiliary for a polymerization process of special fluororubber, particularly low-temperature fluororubber. The low-temperature resistance can reach (-40) DEG C, so that the special fluoroether oligomer can be further accepted in markets of space flight and aviation and automobile industry.