898 results about "Ethylene glycol monomethyl ether" patented technology

The invention relates to a preparation method of a slow-setting polycarboxylic acid water reducing agent, which is implemented by carrying out free radical copolymerization reaction on allylsulfonate monomers, acrylic monomers, polyethylene glycol nono-methyl ether methacrylate macromonomers and maleic anhydride grafted beta-cyclodextrin macromonomers. The invention is characterized in that a beta-cyclodextrin side chain is introduced into a polycarboxylic acid main chain, so that the polycarboxylate water reducing agent has favorable slow setting property, micro air-entraining property and better fluidity. The obtained polycarboxylic acid water reducing agent has the advantages of stable product performance, strong adaptability to cement and favorable compatibility; and the cement paste fluidity is up to higher than 290mm (W / C=0.29), the water reducing rate of concrete is up to 30-40%, and the slump protection time is 3-5 hours. The preparation method provided by the invention has the characteristics of unique technique, excellent product performance and the like.

The present invention relates to a method of producing an electroconductive cellulose-based film having high uniformity and transparency and excellent in optical properties while preventing a bleaching phenomenon at the time of forming an electroconductive layer. The method of producing an electroconductive cellulose-based film according to the present invention is a method of producing an electroconductive cellulose-based film by coating a cellulose-based film with a coating solution containing a binder, superfine particles and a solvent to form an electroconductive layer thereon, wherein the coating solution comprises at least one kind of glycol monoalkyl ether-based solvent selected from the group consisting of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether in an amount of 20 to 40% by weight based on the total solvent, and a ketone-based solvent in an amount of 20 to 50% by weight based on the total solvent.

The invention discloses a making method of Li-La-Ti oxide in the lithium ion battery domain, which comprises the following steps: adopting lithium nitrate, lanthanum nitrate and butyl titanate as raw material with molecular formula as Li3xLa2 / 3-xTiO3 (0<x<0.16); setting the molar rate of Li, La and Ti at 1: 1: 2; adopting alcohol or ethylene glycol monomethyl ether as solvent; or adjusting pH value under 1 through water and acetate; drying solution; sintering under 800-900 deg.c for 2h; obtaining pure LLTO. the invention shortens experimental period and synthesizing temperature with grain size about 200nm, which possesses excellent compact and electric property.

The invention relates to an ultrahigh-sensitivity fluorescent probe for detecting nitrogen monoxide. The ultrahigh-sensitivity fluorescent probe has the structural general formula in the original text. During preparation, firstly, 4-bromine-1, 8-anhydride naphthalene and o-nitro p-phenylenediamine with equal molar weights are used as raw materials, dissolved in ethylene glycol monomethyl ether and heated for reaction to obtain light yellow solid. Secondly, the light yellow solid is dissolved in anhydrous DMSO, primary amine is added into the anhydrous DMSO, the anhydrous DMSO is heated and refluxed, and reaction liquid is filtered in a sucking manner, depressurized and dried to obtain yellow solid. The yellow solid is dissolved in mixed liquid of tetrahydrofuran and methanol, and a yellow probe is obtained under catalysis of hydrogen and catalysts. Probe molecules have fine chemical and optical stability, good solubility and biological compatibility and high nitric oxide selectivity, and are free of interference of other active oxygen, active nitrogen and the like. Laser confocal imaging experiments indicate that the probe has fine cellular permeability, has no toxic and side effects on cells and organisms, and can be used for detecting protogenetic nitrogen monoxide in a high-sensitivity manner.

The invention relates to a compound photocatalysis material with bismuth-sulfide nano particles / bismuth oxychloride and a preparation method thereof. The preparation method comprises the following steps of: firstly, dissolving bismuth nitrate and chlorinated 1-dodecyl-3-methyl glyoxaline into ethylene glycol monomethyl ether respectively, afterwards carrying out a thermal reaction by a solvent soas to prepare bismuth-oxychloride micron balls, then adding the bismuth-oxychloride micron balls into a water solution containing a sulfur source and exchanging parts of ions so as to prepare a compound photocatalysis material containing bismuth-sulfide nano particles and bismuth oxychloride. The method disclosed by the invention can be executed at room temperature and normal pressure, the cost is low, and equipment is simple and is easy to operate; and moreover, the compound photocatalysis material with the bismuth-sulfide nano particles / bismuth oxychloride can be produced at a large scale and has important potential application in the aspect of industrial production. The prepared compound photocatalysis material with the bismuth sulfide / bismuth oxychloride has favorable absorption of visible light, the separation of a photon-generated carrier is obviously improved, and the photocatalysis performance of the material is greatly enhanced.

The invention relates to a preparation method of a mud-resistant type polycarboxylate superplasticizer. First, polyethylene glycol monomethyl ether and acrylic acid are used as raw materials and synthetized into polyethylene glycol monomethyl ether methyl acrylate. Then, the prepared polyethylene glycol monomethyl ether methyl acrylate is copolymerized with mixed liquid which is made from the acrylic acid and diacrylamide sodium dimethallyl sulphonate and mixed liquid which is made from ammonium persulfate and mercaptoethanol, alkaline compounds are added to regulate a pH value to 7-8 after reaction, and the mud-resistant type polycarboxylate superplasticizer is obtained. In the preparation method, technical parameters and conditions, such as raw material ratio, the used amount of chain transfer agents and initiators, copolymerization temperature, time and the like are determined. The reaction conditions are mild, the adopted equipment is simple, the equipment investment is small, the technology is reasonable, and the operation is simple and favorable for industrial production.

The invention relates to the field of medicinal chemistry, in particular to an Uloric crystal and a preparation method thereof. The Uloric crystal is characterized in that x-ray powder diffraction feature absorption peak (2theta) values have feature peaks at the parts of 6.70 degrees, 7.26 degrees, 9.40 degrees, 12.86 degrees, 13.42 degrees, 16.48 degrees, 19.70 degrees, 22.10 degrees, 23.16 degrees, 23.86 degrees, 25.02 degrees, 25.92 degrees, 26.74 degrees, 28.34 degrees and 40.48 degrees. An Uloric alpha crystal form of the invention has simple process operation and low cost. Only Uloric needs to be dissolved in a single solvent of ethylene glycol monomethyl ether so as to avoid solvation crystal habit, and the crystal form is stable and has good reproducibility. Moreover, the Uloric alpha crystal form has good solubility and better dissolution rate than A crystals in a solid preparation.

The invention belongs to the technical field of preparation of semiconductor thin films, and particularly relates to a low-temperature treatment method for producing an indium gallium zinc oxide (IGZO) semiconductor thin film by using a sol-gel method. The method comprises the following steps of: dissolving In(NO3)3.4*5H2O, Ga(NO3)3.4*5H2O and Zn(C2H3O2)2*5H2O into ethylene glycol monomethyl ether serving as a solvent and monoethanolamine serving as a stabilization agent to form a clear stable precursor solution; and coating the precursor solution on a glass substrate in a rotatable manner, and irradiating by using an infrared heating lamp to obtain the flat and transparent IGZO semiconductor thin film. Compared with the conventional method for preparing the IGZO thin film through annealing of a heat plate by using the sol-gel method, the method has the advantages that the IGZO thin film irradiated by the infrared heating lamp is relatively high in semiconductor and optical properties, and the process temperature is relatively low and lower than 250 DEG C; the IGZO thin film is used as a thin film transistor with a trench layer material; the switch current ratio is more than 5*10<6>; the saturated migration rate is more than 1.8 cm<2> / Vs; and the subthreshold amplitude is less than 2.2 V / dec.

The cleaning agent for fuel oil system includes: 5-20% of macromolecular cleaning dispersing agent which can be one of polyisobutyramide, polyether amine, polyalkylphenol, alkylpolyuerthane and polyisobutylene succimide, 10-30% of breakout oil which can be one of alkylpolypropylene glycol ether, alkalpolybutaglycol ether, engine oil, base oil, liquid paraffin and vegetable oil, 5-20% of water-removing agent which can be one or two kinds of main group phenol polyethenoxy ether, octadecyl polyethenoxy ether, Peregral, dodecyl alcohol amide, Tween-80 and Span-80, 15-35% of polar solvent which can be one or several kinds of isopropanol, isobutanol, ethylene glycol monomethyl ether and ethylene glycol monobutyl ether and 30-65% of diluting agent.

The invention belongs to the field of medical technology, relates to a high-stability polyethylene glycol-polyester polymer and an application thereof, and particularly relates to an amphiphilic block copolymer having a hydrophilic block and a hydrophobic block with terminal hydroxyl, wherein the terminal hydroxyl of the hydrophobic block is replaced by a cholic acid group. The hydrophilic A block is any one of ethylene glycol monomethyl ether, polyethylene glycol, polyvinyl alcohol and polyvinylpyrrolidone; the hydrophobic B block is any one of polylactide, polylactide-co-glycolide, polyglycollide, polycaprolactone, polylactide-co-caprolactone, polyglycollide-co-caprolactone and polylactide-co-glycolide-cocaprolactone. The polymer provided by the invention can spontaneously form high-stability micelle in a waterborne medium, and can be used as a carrier of various water-insoluble drugs.

The invention discloses an ink for inkjet printing and a preparation method as well as a zirconia film printed by the ink for the inkjet printing. The preparation method for the ink for the inkjet printing comprises the steps: (1) dissolving zirconium oxychloride in a mixed solvent to obtain a mixed solution, wherein the mixed solvent is prepared from ethylene glycol monomethyl ether and ethylene glycol in a volume ratio of (0.5 to 2) to (2 to 1)1; (2) adding PVP to the mixed solution obtained in the step (1), dissolving and standing to aging, and obtaining the ink for the inkjet printing. According to the ink for inkjet printing and the preparation method as well as the zirconia film printed by the ink for the inkjet printing, the polymer PVP is introduced in the process of preparing the ink for the inkjet printing, the viscosity and the dispersion of the solution are adjusted by due to the existence of the polymer, the system is more likely to generate gelatinization, and the flow of the liquid phase is restricted and the coffee-ring effect is weakened, so that the flatness of the surface of the zirconia film printed by the ink is improved.

A water-basedsoft printing ink comprises the following compositions: 30 to 35 percent of pigment, 25 to 32 percent of acrylic resin, 0.2 to 0.5 percent of antifoaming agent, 2 to 5 percent of ethylene glycol monomethyl ether, 1.0 to 2.5 percent of wax slurry, 0.9 to 1.5 percent of leveling agent, and 23 to 30 percent of water. A preparation method comprises the three working procedures of colored slurry grinding, aquosity treatment and printing ink preparation in turn. The water-basedsoft printing ink has novel compositions, scientific blending, simple preparation, lower cost, fine ink quality, mellow brightness, high color saturation, brilliant color, high drying speed, grid point superimposition and overprinting, good water solubility, easy cleaning, corrosiveness free on printing rollers, low viscosity, high color content, good penetrability and printing adaptability, suitability for multicolor machine high-speed printing, high abrasion resistance, difficult decolorization, wide color range, closeness to a normal color sample, and consistency to the requirements on top-grade printing; and the printing ink also meets EU ROHS standards, and facilitates safe production and environmental protection with low air pollution and without any noxious solvent residual.

The invention relates to a dual sensitive amphiphilic triblock copolymer containing disulfide bond and acylhydrazone bond and a preparation method and an application of the dual sensitive amphiphilic triblock copolymer. A BAB type amphiphilic triblock copolymer consists of a hydrophobic polyester block A and a hydrophilia polyethylene glycol block B, wherein the block A is polyether containing active terminal amino group and disulfide bond; the block B is benzaldehyde ester of an ethylene glycol monomethyl ether or single terminated polyoxyethylene polypropylene oxide copolymer; the block A and the block B are connected through acid sensitive acylhydrazone bond generated from reaction of active terminal amino group and aldehyde group. The dual sensitive amphiphilic triblock copolymer is good in biocompatibility and biodegradability, can be formed into nanoparticles with oxidation reduction sensitivity and acid sensitivity in a water medium in a self-assembling manner, can wrap hydrophobic medicines to form nano medicine preparations, and can promote rapid release of medicines in tumor cells due to fracture of disulfide bond and acylhydrazone bond which are sensitive to oxidation reduction in a high concentration glutathione and acid micro environment in the tumor cells.

The invention discloses a preparation method of carbasalate calcium, comprising the following steps of: according to parts by weight, adding 4 to 6 parts of methanol or ethanol solvent in a dissolution kettle, heating up to 30 DEG C to 40 DEG C, adding 1 part of aspirin, 1.1 parts of urea and 1.05 parts of calcium nitrate in sequence, heating and stirring for fully dissolution, then filtering to a reaction kettle; after the filtrate is cooled to 0 DEG C to 5 DEG C, introducing an ammonia solution of the methanol or ethanol and stirring, keeping the temperature below 10 DEG C till the pH value of the reaction system reaches neutral; keeping stirring, heating up to 40 DEG C to 45 DEG C, conducting crystallization and centrifugation, drying and packaging, and then obtaining the finished product. The preparation method uses the methanol or ethanol as single solvent, solves the problems of poor safety performance, high production cost, difficult recycling of solvent and the like caused by the adoption of the mixed solvent of ethylene glycol monomethyl ether and ethanol in the prior art; the preparation method has the advantages of concise production process, low production cost and good safety performance; and the yield can reach 95 to 96 percent.

The invention relates to a preparation method for an amphiphilic segmented copolymer with pH value and temperature sensitivities. The preparation method comprises the following steps: by adopting a reversible addition-fragmentation chain transfer polymerization process, synthesizing a macromolecular chain transfer agent namely tert-butyl polyacrylate, and subjecting the tert-butyl polyacrylate with dimethylaminoethyl methacrylate and ethylene glycol monomethyl ether methacrylate to the reversible addition-fragmentation chain transfer (RAFT) polymerization process again so as to synthesize the amphiphilic segmented copolymer P(tBA)-b-P(DMAEMA-co-PEGMA. The segmented copolymer provided by the invention can self-assemble to form micelles in an aqueous solution, and has pH value and temperature sensitivities, wherein the micelles have a critical pH value of 7 and a critical temperature of 37.5 DEG C. The preparation method provided by the invention has the advantages of high yield, relatively wide applicable monomer range, low requirements on reaction conditions, simple and convenient operation, greenness and environmental friendliness; and the amphiphilic segmented copolymer prepared by using the method provided by the invention has double pH value and temperature sensitivities and broad application prospects, and can be applied to the chemical production fields like dye adsorption, the environment protection fields like heavy metal pollution treatment, and the biomedical fields like controllable release of insoluble drugs.

The invention discloses a method of preparing ethylene glycol monomethyl ether through a continuous etherification method. In the method, the ethylene glycol monomethyl ether is prepared with ethylene glycol and methanol as raw materials in a fixed bed reaction apparatus under the effect of a multiphase etherification catalyst in a continuous etherification manner. The method can increase the selectivity on the main product and inhibit generation of too many side products. Cyclic utilization on the reaction material can be achieved. The method is carried out with the multiphase etherification catalyst so that corrosion on devices due to usage of liquid acid and the like catalysts is avoided. The product is high in quality and can be applied in large scale.

The invention discloses a multifunctional automobile protective wax, which comprises the following components: 19.6-30% of original wax formed by microcrystalline wax and paraffin, 10-13% of emulsifier formed by stearic acid and triethanolamine, 4.1-6.3% of assistant formed by diatomite, ethylene glycol monomethyl ether and methylsiliconeoil, and the balance water. In the invention, the multifunction automobile wax can be prepared by compounding the rigid microcrystalline wax and the soft paraffin and organically integrating the characteristics of high melting point, good radiance and strong adhesion of the rigid wax with the characteristics of low melting point, good toughness and favorable rust protection of the soft wax through adopting a dispersing emulsion method and controlling the fixed acid value in the emulsion process, and the multifunctional automobile protective wax has the functions of corrosion and rust resistance as well as polishing and beautifying.

The invention discloses a resin composition. The resin composition is prepared from the following components in parts by weight: 10-30 parts of epoxy soybean oil modified epoxy resin, 70-90 parts of phosphorus modified phenolic epoxy resin, 15-20 parts of biphenyl type phenolic resin, 5-20 parts of nonyl phenol modified benzoxazine, 70-103 parts of silicon dioxide, 20-50 parts of boehmite, 0.08-0.85 part of diphenyl imidazole, 30-80 parts of acetone and 30-80 parts of ethylene glycol monomethyl ether. The resin composition is used for preparing a copper-clad plate. According to the resin composition, the problems that a copper-clad plate is poor in dimensional stability and heat resistance after being solidified by an existing adhesive resin system are solved; the heat resistance and dimensional stability of CEM-3 are improved; and the coefficient of thermal expansion of the plate is also improved, so that the production technology of the CEM-3 reaches the advanced level at home.

The invention provides a method for preparing an Nd / Co-codoped BiFeO3 film on an FTO (fluorine-doped tin oxide) / glass substrate surface, which comprises the following steps: after cleaning an FTO substrate, carrying out ultraviolet irradiation, and dissolving bismuth nitrate (8% excessive), ferric nitrate, neodymium nitrate and cobalt nitrate which serve as raw materials in mixed ethylene glycol monomethyl ether and acetic anhydride in a mol ratio of 0.98:(1-x):0.1:x (x=0.01-0.05), thereby obtaining a stable BiFeO3 precursor solution of which the metallic ion concentration is 0.1-0.5mol / L; and after spin coating, drying to obtain a dry film, preannealing, naturally cooling, repeating the process above to obtain the film with expected thickness, and finally, annealing to obtain the crystalline BiFeO3 film. In the invention, the facility requests are simple, the experiment conditions can be easily achieved, the prepared film has good uniformity, the doping amount is easy to control, andthe dielectric properties of the film can be greatly enhanced by doping.

The invention discloses an anticorrosive environment-friendly spray paint formula, and relates to the field of chemical industries. The anticorrosive environment-friendly spray paint formula comprises the following components in parts by weight: 28 to 35 parts of glacial acetic acid, 3 to 7 parts of organic fluorine epoxy resin, 7 to 12 parts of epoxy modified organic silicon resin, 2 to 6 parts of glycol monomethyl ether, 6 to 9 parts of dimethyl sulfoxide, 8 to 13 parts of zinc phosphate, 8 to 13 parts of barium chromate, 1 to 4 parts of ethanol, 2 to 7 parts of polyacrylate, 1 to 4 parts of alcohol soluble resin, 7 to 13 parts of diacetone alcohol, 6 to 9 parts of zinc oxide, 8 to 13 parts of toluene diisocynate, 3 to 7 parts of n-butyl acetate, 12 to 16 parts of benzophenone, 9 to 13 parts of triethanolamine and 3 to 7 parts of diphenyl polysiloxane. The paint is bright in color and good in air-curing resisting effect, can substitute medium chrome yellow in inorganic pigment, is applicable to the outer wall paint, and has no harm of heavy metals, no harmful substances, good environment protection effect, little odor, no peculiar smell after being smeared on the wall, good mechanical performance, excellent electric insulation performance, dampness and water resistance, rust and cold resistance and ozone aging resistance.

The invention relates to a nitrated carbon fiber loaded bismuth oxyhalide nanoflower and a preparation method of the nanoflower. The preparation method of the nanoflower comprises the following steps: respectively dissolving a halogenous ionic solution and bismuth nitrate in ethylene glycol monomethyl ether, slowly adding the halogenous ionic solution into a bismuth nitrate solution after the halogenous ionic solution and the bismuth nitrate are fully dissolved in the ethylene glycol monomethyl ether, evenly stirring and mixing the mixed solution, pouring the mixed solution to a high-pressure reaction kettle with a polytetrafluoroethylene liner, then placing nitrated carbon fiber in the kettle, reacting for 0.5-6 hours in a drying oven at the temperature of 150-160 DEG C, naturally cooling and then washing and drying to obtain a product. Through the nitrated carbon fiber loaded bismuth oxyhalide nanoflower, the BiOX is reused and the problem of secondary pollution is solved; ACF (Active Carbon Fiber) is excellent in adsorption property and capable of absorbing organic pollutants and facilitating the photo-catalysis.

The invention discloses lead-free silver and aluminum slurry for a solar photocell. The slurry is prepared from raw materials in percent by mass as follows: 75-80% of silver powder, aluminum powder and copper powder, 15-20% of organic bond, 1-5% of inorganic glass powder, and 1-5% of additive; the purities of the silver powder, the aluminum powder and the copper powder are more than or equal to 99.9%; the organic bond is prepared from the following materials in percent by mass of: 0.5-2% of butyl carbitol, 1-2.5% of resin, 1-4% of rosin, 11-13% of ethylene glycol monomethyl ether, 5-9% of diethylene glycol monobutyl ether, 65-75% of cyclohexanone and 10-20% of n-butyl alcohol; the inorganic glass powder is prepared from the following materials in percent by mass of: 1-3% of titanium dioxide, 55-75% of boric acid, 3-5% of aluminium sesquioxide, 15-25% of antimony oxide and 2-5% of zirconium oxide; and the additive is prepared from the following materials in percent by mass of: 35-45% of span and 55-65% of pump oil. The lead-free silver and aluminum slurry prepared by the raw material has the advantages of good weldability and strong adhesion and meets the lead-free environmental friendless requirement.

The invention provides a preparation method for bismaleimide resin modified cyanate prepreg, Imide-thioether with end capped by maleic anhydrided and cyanate dissolve in one or the mixture of dioxane, ethylene glycol monomethyl ether and glycol dimethyl ether to be heated and stirred to obtain a resin solution used for impregnating fibers. The preparation method has the advantages that bismaleimide resin and cyanate copolymer with good forming processes are adopted, and low boiling point solvents are adopted to be propitious to the preparation of high performance composites; the tensile strength of the composites which are enhanced by glass fibers is more than 300MPa, and the elongation at break is more than 10 percent. Compared with the ordinary bismaleimide resin modified cyanate, the composite of the invention which is prepared by the bismaleimide resin modified cyanate has higher toughness.

The invention relates to a preparation method of a BiFeO3 material, a BiFeO3 / TiO2 composite film and an application thereof. The preparation method of the BiFeO3 material comprises the steps: firstly, dissolving bismuth nitrate and ferric nitrate into ethylene glycol monomethyl ether to obtain a solution I; then, dissolving citric acid into the solution I to obtain a solution II; and next, regulating the PH value of the solution II to 3-5 by using acetic acid to obtain a BiFeO3 sol. The BiFeO3 / TiO2 composite film comprises a substrate, wherein the substrate is coated with double layers of films which are respectively a BiFeO3 film layer and a TiO2 film layer. The absorptivity of the BiFeO3 / TiO2 composite film on a visible light wave band is greatly improved through the absorption spectrum test and theoretical analysis on the double layers of films. The BiFeO3 / TiO2 composite film is applied to the preparation of photovoltaic materials, solar cells, orientation controlled photoelectric functional device materials and visible light catalysis sterilization materials.

The invention discloses a method for preparing manganese, nickel codoped bismuth ferrite film by a sol-gel process. The method comprises the steps of weighing material ferric nitrate, bismuth nitrate, manganese acetate and nickel acetate according to a general formula BiFe(1-2x)MnxNixO3 (x is smaller than or equal to 0.05 and greater than or equal to 0.0125); adding glacial acetic acid to agitate for 30 minutes at 80 DEG C; and adding ethylene glycol monomethyl ether to agitate for 180 minutes at room temperature to prepare into a liquid precursor of which the concentration is 0.1-0.2mol / L. The final sample is obtained by preparing a wet film on indium tin oxide / glass or a platinum substrate by a spin-coating method, pre-annealing, finally annealing the film, and repeating the pre-annealing and film annealing processes for 10-20 times. The method has the characteristics that the impurity phase in bismuth ferrite can be effectively restrained; the grain size and the root-mean-square roughness of the film surface are reduced; the insulating property, ferroelectric properties, the ferromagnetic property and the optical property of the sample are improved; and the method is simple in production technology, good in reproducibility, and low in cost.

The invention provides a method for preparing a Tb / Cr-codoped high-remanent-polarization BiFeO3 film by a sol-gel process, which comprises the following steps: dissolving bismuth nitrate, ferric nitrate, terbium nitrate and chromic nitrate in a mol ratio of 0.94:(1-x):0.11:x in a mixed solution of ethylene glycol monomethyl ether and acetic anhydride, and adding ethanolamine to obtain a stable BiFeO3 precursor solution, wherein the total metal ion concentration in the BiFeO3 precursor solution is 0.3 mol / L, and x=0.01-0.03; and carrying out spin coating and layer-by-layer annealing to obtain the Tb / Cr-codoped crystalline BiFeO3 film. The facility requests are simple, the experimental conditions are each to achieve, the film has favorable uniformity, the doping amounts of Tb and Cr can be accurately controlled, and the crystal structure can be adjusted by codoping to greatly enhance the ferroelectric properties of the film, so that the saturated remanent polarization of the film can reach 80.8 mu C / cm<2>.

The invention discloses a method for improving the hydrophilia and flexibility of a polypeptide membrane through polydioxanone and polyethylene glycol. The method includes the following steps that firstly, carboxyl-terminated polydioxanone monododecyl ether, a solution, a condensing agent and a polypeptide homopolymer are added in a drying reactor for reaction for 3-4 days, and a polypeptide-polydioxanone segmented copolymer is obtained; secondly, carboxyl-terminated polydioxanone monododecyl ether carboxyl, a solution, a condensing agent and amidogen-terminated ethylene glycol monomethyl ether are added in the drying reactor for reaction for 2-3 days, and a polyethylene glycol-polydioxanone segmented copolymer is obtained; thirdly, the polypeptide-polydioxanone segmented copolymer, the polyethylene glycol-polydioxanone segmented copolymer and a solvent are added in the drying reactor to be mixed for 40-50 minutes, then tape casting is used for forming the membrane, drying is conducted, and the target object of the method is obtained. The method is simple in preparation technology, and the hydrophilia and flexibility of the obtained modified membrane are greatly improved.

The invention discloses an early strength type ether polycarboxylate superplasticizer and a preparation method thereof, and relates to the technical field of building materials. The superplasticizer is prepared from the following raw materials in parts by weight: 20-30 parts of an isopentenol polyethylene glycol monomethyl ether macromonomer with a polymerization degree of 27, 50-60 parts of an isopentenol polyethylene glycol monomethyl ether macromonomer with a polymerization degree of 113, 6.5-8.6 parts of acrylic acid or a derivative monomer thereof, 0.3-1.5 parts of a chain transfer agent, 0.4-0.6 part of an initiator, 2.5-3.5 parts of 2-acrylamido-2-methyl-1-propane sulfonic acid and 125-135 parts of deionized water. The early strength type ether polycarboxylate superplasticizer disclosed by the invention has the beneficial effects of small doping amount, remarkable early strength effect, high water reduction rate, small slump loss, environmental protection, smaller molecular weight distribution and higher free radical polymerization conversion rate, and the early strength of concrete prepared by a synthetic sample of the early strength type ether polycarboxylate superplasticizer disclosed by the invention is better than that of the concrete using a common superplasticizer.

The invention discloses organic phosphates containing an ethyoxyl (CH2CH20) unit, a preparation method and application thereof. The organic phosphates have the following structural general formula: in the formula, n is 1 or 2; R can be CH3 or C2H5 or CF3CH2; and radicals of two R are the same. The preparation method is to heat ethylene glycol monomethyl ether containing chloromethyl or diethylene glycol monomethyl ether containing the chloromethyl and phosphite ester containing an R radical as raw materials by taking absolute nickelous chloride as a catalyst for a sufficient reaction, and distill at reduced pressure so as to obtain the organic phosphate. The organic phosphate prepared by the method has excellent flame retardance, thermal stability and excellent electrochemistry performance, can be used as secondary lithium ion battery high-safety electrolysing solution, and has wide industrial application prospect. The method has the advantages of simple steps, short time, completion in a common laboratory and easy popularization.