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

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 a salt-resistant and calcium-resistant filtrate reducer applied to a drilling fluid and a preparation method of the filtrate reducer. The filtrate reducer is prepared from raw materials and water, wherein the raw materials comprise 2-acrylamide-2-methyl propane sulfonic acid, acrylic acid, acrylamide and dimethyl diallyl ammonium chloride; the ratio of m(2-acrylamide-2-methyl propane sulfonic acid) to m(acrylic acid) to m(acrylamide) to m(dimethyl diallyl ammonium chloride) to m(initiator) to m(molecular weight control agent) is (40-60) to (6-10) to (30-40) to (5-9) to (1-2) to (0.1-0.5). The molecular weight of the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid and prepared by the preparation method is greatly improved; the coating property, the inhibition property, the heat stability and the salt-resistant and calcium-resistant pollution capacity of the filtrate reducer are greatly improved; by virtue of the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid, the rheological property of the drilling fluid can be greatly improved; the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid also has a high temperature-resistant effect at 150-180 DEG C.

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.

The invention discloses a preparation method for nano-polymer of hydroxyl acid aniline and pyrrole, which is characterized in that hydroxyl sulfonic aniline and pyrrole dissolve in acid solution are added with oxidizers to totally react and then the nano-polymer of hydroxyl sulfonic aniline and pyrrole is obtained. The preparation method has the advantages that the sulfonic aniline monomer and the pyrrole are adopted to carry out the simple chemical oxidation copolymerization, and the electrostatic repulsion effect of the sulfonic groups is utilized to obtain conductive pyrrole copolymer nano-particles; the method does not additionally need stabilizing agents, so the post treatment process is very simple, and the obtained nano-particles have clean surfaces and good self stability; at the same time, the functional groups are introduced into the copolymer molecules.

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 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 discloses a novel glass oil stain cleaning hairbrush. The hairbrush is of a three-layer structure, wherein the three layers are mutually nested; the inner layer is a corrosion-resistinghigh-tenacity rubber strip; the middle layer is soluble soft wax; and the outer layer is a sponge. The hairbrush has the beneficial effects that the inner layer, which is the corrosion-resisting high-tenacity rubber strip, can be bent forth and back due to the addition of toughened polyvinyl chloride, so that service life in practical use is prolonged; through acrylate polymer double bonds, self-polymerization and co-polymerization are promoted, agglomeration is accelerated, and tenacity is enhanced; the middle layer, which is soluble soft wax, takes micro-crystalline wax as a main body, and the middle layer is defined in cooperation with the micro-crystalline wax and vegetable oil; the outer layer is covered by wax which is prepared from an oil gel, and the wax can get thinned as being dissolved together with oil stains which are adsorbed, so that the oil stains can be effectively cleaned; the oil stains are adsorbed by virtue of the sponge of the outer layer; and the oil stains can penetrate to the surface of the wax via the sponge, get dissolved together with the wax and remain on the sponge, so that secondary pollution to glass is prevented.

This application relates to a preparation method of silicone-modified polyacrylate pressure-sensitive adhesive. The mixture of butyl ester, acrylic acid functional monomer and a part of the initiator is continuously added dropwise for reaction. After the drop is completed, methyl methacrylate as acrylic acid hard monomer is added to the reactor at one time, and then the remaining part of the initiator is added to the reactor at one time. , continue the reaction. Since the present invention adopts SPS, and adopts the process of adding dropwise reaction first and then adding methyl methacrylate and the remaining initiator to react, the prepared silicone modified polyacrylate pressure-sensitive adhesive can guarantee a certain degree of peeling Strength while reducing the growth of peel strength, and has high temperature resistance.

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 provides a multi-layer oil stain adsorption cleaning tool. A brush is of three-layer structure, the three layers are in nesting, wherein an inner layer is an anti-corrosion and high-tenacity rubber bar, a middle layer is soluble soft wax, and an outer layer is sponge. The multi-layer oil stain adsorption cleaning tool has the beneficial effects that the inner layer is the anti-corrosion and high-tenacity rubber bar, due to adding of toughening polyvinyl chloride resin, to-and-fro bending can be realized, the service life is long, acrylic polymers adopt double bonds, auto-agglutination can be realized easily, copolymerization also can be realized easily, aggregation is realized rapidly, the tenacity is increased, the middle layer is soluble soft wax, microcrystalline wax is adopted as the main body, vegetable oil is matched for forming the inner layer, the outer layer is coated with wax prepared by adopting oil gel, after adsorbing oil stains, the wax is dissolved and diluted with the oil stains, so that the oil stains are effectively cleaned, the sponge on the outer layer adsorbs the oil stains, the oil stains permeate to the surface of wax through the sponge, are dissolved with the wax, and are left on the sponge, so that no secondary pollution is caused to glass.

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.