15results about How to "Improve grafting efficiency" patented technology

The application relates to the field of graphene oxide, and discloses modified graphene oxide, which comprises graphene oxide and grafted polyoxyethylene chains, the chemical formula of the polyoxyethylene chains being -CH2CH(OH)CH2O(CH2CH2O) n CH2CH2OH, wherein n is any integer of 3-20; the grafting rate of the polyoxyethylene chains in the modified graphene oxide is 30-50%. The modified graphene oxide has good salt resistance, can resist acid / alkali aqueous solutions, and effectively inhibits the accumulation and agglomeration of graphene oxide.

The present application relates to a kind of preparation methods of smoke-suppression type emulsion explosive composite wax resin, including using the C5 olefin rich component of 50~75 ℃ of cracking C5 rectification interception as raw material, first by the cationic polymerization of anhydrous aluminium chloride catalysis to obtain refined resin liquid D, then copolymerization with p-divinylbenzene and allyl phosphoric acid diester.The emulsion explosive composite wax prepared by the present application has good environmental protection and comprehensive physicochemical properties, and has important significance for the preparation and application of environmental protection type emulsion explosive.

The invention relates to a high-strength antibacterial spandex fabric and a preparation method thereof, and belongs to the technical field of functional textile materials. The spandex fiber comprises a spandex fiber matrix and a functional polymer layer grafted on the surface of the matrix through a covalent bond, and the functional polymer layer is a polymer of an unsaturated derivative of natural phenolic acid and is prepared by introducing carbon-carbon unsaturated bond groups such as acryloyloxy and the like into the natural phenolic acid through esterification or etherification. During preparation, the spandex fiber is subjected to plasma pretreatment, and then the spandex fiber and the natural phenolic acid-containing unsaturated derivative monomer are subjected to thermal initiation or photo-initiation graft polymerization to form the functional layer. The lasting and stable antibacterial function is achieved through covalent bond grafting, the natural phenolic acid derivative endows the fiber with the environment-friendly and non-dissolution type antibacterial property, the functional layer can improve the modulus and breaking strength of the fiber, the intrinsic elasticity of spandex is considered, the comfortable fitting characteristic of the composite fabric is reserved, and the composite fabric is endowed with the high strength and the antibacterial function.