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

The invention discloses a sulfonate betaine type hydrophobic association polymer and a preparation method thereof. The preparation process of the sulfonate betaine type hydrophobic association polymer is as follows: first, acrylamide and acrylic acid are mixed in an aqueous solution, adjusted The pH of the system is about 6~8, add 3-(methacrylamide propyl dimethylamino) propane sulfonate, N-aryl-N-alkyl (meth)acrylamide and sodium lauryl sulfate, Stir until the solution is clear, pass nitrogen to remove oxygen, add photoinitiator azobisisobutylamidine hydrochloride, and carry out polymerization under photoinitiation conditions. The present invention combines the advantages of double-tailed hydrophobic association polymers and betaine-type polymers, significantly improves viscosity increasing, temperature resistance, salt resistance, and hydrolysis resistance, and can be used for flooding of enhanced oil recovery in oilfield development The preparation method of the oil agent or acidified fracturing thickener has reliable principle, simple operation and broad market prospect.

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 supramolecular polymer based on multiple intermolecular acting forces. The supramolecular polymer is prepared by a reaction monomer acrylamide, crylic acid, maleic anhydride modified beta-cyclodextrin and methylacryloyl chloride modified alkylphenol polyoxyethylene ether through polymerization reaction. The preparation method comprises the steps that 1, the acrylamide, the crylic acid, the maleic anhydride modified beta-cyclodextrin and the methylacryloyl chloride modified alkylphenol polyoxyethylene ether are added into deionized water, the pH value of a system is regulated to 6-8 after even stirring; 2, nitrogen is introduced to the solution obtained in the step 1 for 30 minutes to remove oxygen, a redox initiation system prepared from persulfate and sodium hydrogen sulfite is added, heating is performed to 30-50 DEG C, and reaction is performed for 4-7 hours to obtain a polymer colloid, namely the supramolecular polymer. The supramolecular polymer is used for oil field displacement, the viscosity, heat resistance and salt tolerance properties and shear restoration of the supramolecular polymer are remarkably improved, and the supramolecular polymer has a higher use value.

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 discloses a double-tailed hydrophobic association polymer with surface activity and a preparation method thereof. The double-tailed hydrophobic association polymer is prepared by free radical micellar polymerization: it contains acrylamide, acrylic acid, 2-propylene Aqueous solution of amido-2-methyl propane sulfonic acid, surface-active macromonomer lauryl polyoxyethylene ether (meth)acrylate, adding surfactant sodium lauryl sulfate and hydrophobic monomer N-phenylethyl ‑N‑Alkyl (meth)acrylamide or N‑Benzyl‑N‑Alkyl (meth)acrylamide, using surfactants to solubilize hydrophobic monomers in the micelles they form, using sodium hydroxide The pH value is adjusted to 6~8, and the hydrophobic monomer and the water-soluble monomer are copolymerized by photoinitiation. The polymer can effectively improve the properties of the hydrophobic association polymer such as thickening, temperature resistance, salt resistance, hydrolysis resistance, etc., and the preparation method has reliable principle and simple operation, and has broad market application prospects.

The invention discloses a diacetone acrylamide-acryloyloxyethyl trimethyl ammonium chloride copolymer, as well as a preparation method and application thereof, and belongs to the field of a preparation method for waste water treatment flocculant. The invention solves the problems that the flocculant in the prior art has poor waste treatment effect and high cost. According to the method, an aqueous solution free radical polymerization chain type reaction mechanism is adopted; non-toxic, odorless and green raw materials comprising diacetone acrylamide and acryloyloxyethyl trimethyl ammonium chloride serve as reaction monomers; potassium peroxodisulfate serves as an initiator; and the diacetone acrylamide-acryloyloxyethyl trimethyl ammonium chloride copolymer is obtained through reaction. The method has little side reaction. The obtained novel flocculant product is high in purity, simple in reaction steps, short in process period, easy to operate, environment-friendly and suitable for industrialized large-scale production.