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2716 results about "Methacrylate methyl" patented technology

Method for transferring graphene on metal foil substrate

The invention discloses a method for transferring graphene on a metal foil substrate. The method is characterized by comprising the following steps of: rotatably coating a protective colloid on the surface of the graphene to form a protective colloid layer on the surface of the graphene, wherein the protective colloid is a mixed solution of a photoresist and a polymethyl methacrylate solution; placing the graphene with the protective colloid layer on the surface into a metal foil etching solution, and forming a composite layer of a graphene/protective colloid layer after the metal foil is completely etched; taking out the composite layer of the graphene/protective colloid layer, placing the composite layer into deionized water to be soaked and cleaned, then, transferring the composite layer on a target substrate, next, centrifuging the target substrate on centrifuging equipment, immersing the target substrate into an acetone solvent after the centrifuging operation is ended, and etching the protective colloid layer. The protective colloid used in the method is simple in preparation and easy to remove, so that no protective colloid is remained on the graphene; the liquid remained on the surface of the graphene and between the graphene and the target substrate after being transferred on the target substrate is effectively removed in a centrifuging way.
Owner:合肥微晶材料科技有限公司

Amphiphilic triblock copolymer, preparation method thereof, and polyethersulfone hollow fiber membrane blend-modified by using amphiphilic triblock copolymer

The invention discloses an amphiphilic triblock copolymer with a structural general formula represented as the following. In the formula, when M1 is vinylpyrrolidone and M2 is acrylic acid, M3 is styrene or acrylonitrile or methyl methacrylate; or when M1 is vinylpyrrolidone and M2 is a chemical bond, M3 is styrene or acrylonitrile. m, n, p, q, are all lager than 1. A number-average molecular weight of the copolymer is 30000 to 100000, a glass-transition temperature of the copolymer is 90-180 DEG C, and a decomposition temperature of the copolymer is 180-430 DEG C. The invention also discloses a preparation method of the copolymer, and a polyethersulfone hollow fiber membrane blend-modified by using the amphiphilic triblock copolymer. The amphiphilic triblock copolymer provided by the invention is insoluble in water. When the amphiphilic triblock copolymer is blended with polyethersulfone and is prepared into a polyethersulfone hollow fiber membrane, the amphiphilic triblock copolymeris hard to precipitate. Therefore, the polyethersulfone hollow fiber membrane is provided with permanent hydrophilicity, protein pollution resistance and excellent blood compatibility. The polyethersulfone hollow fiber membrane can be used in the field of blood purification. The preparation method provided by the invention is simple, and is easy to operate. With the method, industrialization is easy to realize.
Owner:SICHUAN UNIV

Silver-gold porous nanorod array, preparation method and purpose of silver-gold porous nanorod array

The invention discloses a silver-gold porous nanorod array, a preparation method and a purpose of the silver-gold porous nanorod array. The array comprises porous gold nanorods coated with 3-15nm silver films and arranged on a methyl methacrylate substrate coated with a gold film, wherein the nanorods are 150-250nm in length, and 50-70nm in diameter; and holes are 5-20nm in diameter. The method comprises the steps of placing an aluminum oxide template coated with a gold film in a mixed electrolytic solution for electro-deposition, obtaining an aluminum oxide template coated with the gold film and provided with a gold-silver alloy nanorod array deposited in holes, placing the aluminum oxide template in a nitric acid solution for reaction to obtain an aluminum oxide template coated with the gold film and provided with a porous gold nanorod array in holes, coating the other side of the gold film with liquid methyl methacrylate, solidifying, then sequentially placing the aluminum oxide template in a silver nitrate electrolytic solution for the electro-deposition and aqueous alkali for removing the aluminum oxide template, or sequentially placing the aluminum oxide template in aqueous alkali for removing the aluminum oxide template, coating a silver film by an ion sputtering method, and obtaining the objective product. The array can serve as an SERS (Surface Enhanced Raman Scattering) activity substrate for detecting trace organic matters.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI

Porous V2O5/C composite microspheres of lithium secondary battery positive electrode material and preparation method of porous V2O5/C composite microspheres

The invention discloses porous V2O5/C composite microspheres of a lithium secondary battery positive electrode material and a preparation method of the porous V2O5/C composite microspheres. The porous V2O5/C composite microspheres are formed by clustering carbon coated V2O5 nano composite particles with the particle sizes of 5-30 mirons, and the porous V2O5/C composite microspheres are internally provided with porous structures. The preparation method comprises the following steps of synthesizing crosslinked polymethyl methacrylate PMMA microgel spheres, hydrolyzing partially so as to act as a mold plate for synthesizing the porous V2O5/C composite microspheres; adsorbing VO<2+> to three-dimensional meshes of the PMMA mold plate, changing the pH value of an adsorption solution, hydrolyzing the VO<2+> to generate V2O5 nano particles, and filling the three-dimensional meshes in situ with the V2O5 nano particles so as to obtain a V2O5/PMMA precursor; and forging the precursor so as to obtain the porous V2O5/C composite microspheres. The composite microsphere has the beneficial effects of improving the multiplying performance and the cycle performance and the like; the preparation method is simple in technology, and is suitable for being used in large-scale industrial production.
Owner:XIANGTAN UNIV

Method for preparing high-solid-content graphene oxide grafted polyacrylate composite emulsion by using in-situ method

The invention relates to a method for preparing a high-solid-content graphene oxide grafted polyacrylate composite emulsion by using an in-situ method. The method comprises the following steps: carrying out ultrasonic treatment on mixed graphene oxide, sulfoxide chloride and N,N-dimethyl formamide; refluxing, raising temperature, carrying out heat preservation and cooling; adding N,N-dimethyl formamide to perform rotary evaporation; adding triethylamine and hydroxyethyl acrylate, and dissolving black powder which is obtained by suction filtration and washing into distilled water; adding sodium lauryl sulfate to carry out ultrasonic treatment, thereby obtaining double-bonded graphene oxide; mixing the double-bonded graphene oxide with sodium lauryl sulfate and distilled water to perform ultrasonic treatment; raising temperature and adding ammonium persulfate and distilled water; and dropwise adding acrylic acid, methyl methacrylate, butyl acrylate and an initiator solution, carrying out heat preservation and discharging. By introducing the double-bonded graphene oxide into the preparation process of the polyacrylate emulsion, the obtained composite emulsion is high in solid content, high in film breaking strength, basically invariable in elongation at break, and high in water absorption rate.
Owner:SHAANXI UNIV OF SCI & TECH
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