30results about How to "Easy to copolymerize" patented technology

Disclosed are an acrylate emulsion modified by one or more acryloxyalkoxysilanes with a controllable latex particle shape, and a preparation method and application thereof. The emulsion of the present invention is obtained by the emulsion copolymerization of (meth)acryloyloxyalkoxysilane and acrylic acid hydrocarbyl ester, and it is not necessary to use methacrylate monomers with high volatility and toxicity, styrene and unsaturated acids. other types of unsaturated monomers. Using the relationship of the reactivity ratio in the reaction kinetics, by controlling the entry of the reaction raw materials, copolymers with different latex particle morphological structures can be obtained through emulsion polymerization. The copolymerization method is simple in operation, low in cost and environmentally friendly. The polymer product thus obtained has significantly improved certain mechanical properties. The emulsions can be used in buffer coatings, adhesives, sealants, gaskets, inks, and cleaning agents. The sealant made with this emulsion has good stability and can be placed stably for more than one year at room temperature. It can be widely used in sealing, coating and bonding of automobiles, building materials, daily products, etc.

The invention discloses a polycarboxylate superplasticizer with high water retention and a preparation method thereof. The polycarboxylate superplasticizer with high water retention is prepared from, by weight, 100 parts of TPEG, 8.3-12.5 parts of MPEG-MA, 10.1-11.2 parts of unsaturated carboxylic acid, 0.8-1.4 parts of organosilicone monomer, 0.7-1.1 parts of an oxidizing agent, 0.2-0.3 part of a reducing agent, 0.3-0.4 part of a chain transfer agent, 163-172 parts of deionized water and liquid alkali for making pH to 5.5-6. The polycarboxylate superplasticizer with high water retention has high slump under the condition of low dosage, workability of concrete can be improved, and water-retention and tackifying effects are achieved. Meanwhile, reaction condition is suitable, the reaction is normal-temperature reaction without heat source, and the technology is concise, environmentally friendly and highly efficient and is suitable for a large-scale industrial production method.

The invention discloses a surface-active two-tailed hydrophobic associated polymer and a preparation method thereof; the surface-active two-tailed hydrophobic associated polymer is prepared via micellar free radical copolymerization: adding a surfactant, sodium lauryl sulfate, and a hydrophobic monomer, N-phenethyl-N-alkyl (methyl) acrylamide or N-benzyl-N-alkyl (methyl) acrylamide into the aqueous solution of acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, and surface-active macromonomer polyoxyethylene lauryl ether (methyl) acrylate, using the surfactant to solubilize the hydrophobic monomer in the formed micelle, using sodium hydroxide to adjust pH to 6-8, and copolymerizing the hydrophobic monomer and a water-soluble monomer by means of photo-initiation. The properties, such as tackifying performance, temperature resistance, salt resistance and hydrolysis resistance, of the polymer can be effectively improved, the preparation method and principle of the polymer are reliable, and the preparation method is simple to perform and has a promising application prospect.

The invention discloses a sulfonate lycine type hydrophobic associated polymer and a preparation method thereof. A preparation process of the sulfonate lycine type hydrophobic associated polymer comprises the following steps that firstly, acrylamide and acrylic acid are mixed in an aqueous solution, and the pH of a system is regulated to be around 6 to 8; secondly, 3-(dimethylamino propyl methacrylamide)propanesulfonate, N-aryl-N-alkyl(methyl)acrylamide and lauryl sodium sulfate are added and stirred until the solution is clear; and thirdly, after nitrogen is led in for deoxidization, a photoinitiator azobis(isobutylamidine hydrochloride) is added for polymerization under photoinitiation conditions. Since advantages of a double-tail hydrophobic associated polymer and advantages of a lycine type polymer are combined, the viscosifying capability, the temperature endurance, the salt resistance and the hydrolysis resistance of the sulfonate lycine type hydrophobic associated polymer are remarkably improved, the sulfonate lycine type hydrophobic associated polymer can be used for an oil-displacing agent or an acidizing and fracturing thickener used for increasing a crude oil recovery rate in oilfield development, and the preparation method of the sulfonate lycine type hydrophobic associated polymer has the advantages of reliable principle, easiness in operation and wide market prospect.

The invention discloses a synthetic method of a graphene reverse osmosis composite membrane, and belongs to the technical field of materials. The method comprises the following steps: firstly preparing amido graphene , then mixing the amido graphene with a solvent, carrying out ultrasonic dispersion, adding unsaturated acyl chloride and triethylamine in sequence, stirring and heating to react; filtering, and washing to obtain an intermediate; adding monomers into a mixture of the intermediate and the solvent, stirring uniformly, then adding an initiator, heating and stirring to form the membrane. According to the reverse osmosis composite membrane prepared by the method, polymers are dispersed among layers, the polymers maintain the dispersion of the layers while the mechanical strength of the membrane is improved, and the reverse osmosis performance of graphene is also retained. The reverse osmosis composite membrane is good in performance, and fundamentally overcomes the defect such as small graphene specific surface area caused by excessive stacking of the layers in the graphene synthesis process. The synthetic graphene reverse osmosis composite membrane can be used for water treatment in the fields of electrons, information, energy resources, materials, biological medicine and the like.

The invention provides a photothermal conversion component which includes at least one of an aniline oligomer and derivatives of the aniline oligomer and is used for convert sunlight into thermal energy. Herein, the derivatives of the aniline oligomer have an aniline oligomer group. The invention also provides applications of the aniline oligomer or the derivatives thereof.

The invention belongs to the field of nanofiber membranes, and particularly relates to a preparation method of a composite nanofiber membrane, the composite nanofiber membrane, application of the composite nanofiber membrane to enzyme immobilization and an immobilized enzyme. An electrostatic spinning solution containing chitosan is adopted for preparing the nanofiber membrane, and the membrane has a good film-forming property and an enzyme-immobilizing function; meanwhile, polypeptide nanofibers are adopted and loaded onto the membrane, in this way, the property of the membrane is further improved, and the enzyme-immobilizing property of the membrane is improved.

The invention discloses a high adhesive force dipping-adhesive manufacturing process which comprises the steps of: synthesizing products with different indexes according to different amine values, viscosities and proportions of materials with different solid contents; controlling reaction time and temperature; determining the chemical infrastructure of materials to be fully reacted; carrying out the curing process so as to obtain a mixture with balanced viscosity and solids after the reactant is reacted; repeatedly stirring and putting the mixture into a vacuum tank; and obtaining finished products after reducing air gaps in a poured product and bubbles. The dipping-adhesive resin has high cross-linking density and big internal stress; as network structures contain a large quantity of hydroxide groups absorbing water easily, the dipping-adhesive resin has the defects of high moisture absorption, bad size stability and dielectric performances, low toughness and bad moist head stability and the like, and phenomena such as adhesive failure, air holes, water waves and the like of products appear in the processing process. By improving the formulation, performances such as heat resistance, moisture absorption, dielectric properties, impact toughness, consolidation and the like are improved. Phenomena such as adhesive failure, air holes, water waves and the like of the produced products are avoided.

The invention relates to a preparation method of chitosan oligosaccharide grafted cellulose fiber. The preparation method comprises following steps: A, preparation of sodium methallyl sulfonate-chitosan, wherein chitosan oligosaccharide is added into hot water to prepare a chitosan oligosaccharide aqueous solution, the chitosan oligosaccharide aqueous solution is cooled to room temperature, sodiummethallyl sulfonate is added into the chitosan oligosaccharide aqueous solution, an obtained mixture is subjected to stirring and heating, and potassium persulfate is added so as to obtain the sodiummethallyl sulfonate-chitosan oligosaccharide solution; B, cellulose fiber pretreatment, wherein cellulose fiber and soft water are introduced into a pretreatment tank, heating, stirring, water discharging, dehydration, and drying are carried out so as to obtain pretreated cellulose fiber; and C, preparation of chitosan oligosaccharide grafted cellulose fiber, wherein the cellulose fiber obtainedin step B is introduced into a reaction vessel, the sodium methallyl sulfonate-chitosan oligosaccharide solution obtained in step A is added, water is added, and stirring, heating, and centrifugal dewatering are carried out so as to obtain the chitosan oligosaccharide grafted cellulose fiber.

The invention discloses a method for preparing polycarbonate by copolymerizing carbon dioxide and alpha-pinene derivatives, and belongs to the field of high molecular materials. The polycarbonate material with an alternate structure is prepared by copolymerizing two alpha-pinene derivatives and the carbon dioxide under a catalytic system and under the condition that the carbon dioxide pressure is 2.0 to 5.0 MPa, wherein the catalytic system consists of tetradentate schiff base metal complexes SalenMX as a main catalyst and bi(triphenylphosphine) ammonium chloride or 4-dimethylamino-pyridine or the like as a cocatalyst. By adoption of the method, the process is simple, and the raw material alpha-pinene is cheap, easily available and renewable. The method has the advantages of high catalytic efficiency, large molecular weight of copolymers, narrow distribution and the like. The polycarbonate obtained by polymerization has the characteristics of excellent biodegradability, excellent biocompatibility and the like, and can be applied to industries such as agriculture, biomedicine and the like.

The invention discloses an application method of single body entry type ceramic wood. During ceramic wood preparing, sodium phenylacetate and chloropropene prepared through the reaction of phenylacetic acid and sodium hydroxide enters wood, allyl phenylacetate is generated, then, a high-molecular polymer is generated, and a net-shaped structure is formed by the high-molecular polymer and wood fiber. The interior-exterior structure, rigidity and strength of the ceramic wood can be consistent, and the interior and exterior waterproof performance, corrosion resisting performance, mothproof performance, anti-mold performance, safety performance and size stability of the ceramic wood are guaranteed, and therefore the ceramic wood can be directly used on the premise that coating of a coat is notconducted; and when the surface of the ceramic wood is old-fashioned, the performance of the ceramic wood is not influenced after grinding.