23 Jul Preparation method of industrial hemp stalk core cellulose based temperature-sensitive composite hydrogel
Abstract
The invention discloses a preparation method of an industrial hemp stalk core cellulose based temperature-sensitive composite hydrogel. The preparation method comprises the steps of: preparing the raw material by cutting the hemp stalk core part which is air-dried previously, performing cellulose extraction and pulping pretreatment on the stalk core, and then carrying out selective oxidization of the cellulose which is subjected to the pulping pretreatment previously by the method of a piperidine oxynitride free radical/cooxidation system to obtain nano oxidized cellulose; simultaneously, carrying out a grafting copolymerization reaction of the pretreated stalk core cellulose by an aqueous solution polymerization method to obtain a dimethyl diallyl ammonium chloride cellulose network body; next, dipping the dimethyl diallyl ammonium chloride cellulose network body into the aqueous solution of the nano oxidized cellulose to obtain the industrial hemp stalk core cellulose based temperature-sensitive composite hydrogel. The obtained industrial hemp stalk core cellulose based temperature-sensitive composite hydrogel has UCST (Upper Critical Solution Temperature) characteristic; the volume phase transition temperature of the industrial hemp stalk core cellulose based temperature-sensitive composite hydrogel is controlled within the range from 35 to 50 DEG C; the industrial hemp stalk core cellulose based temperature-sensitive composite hydrogel has bright application prospect in a plurality aspects such as drug controlled-release carriers, tissue engineering, active enzyme immobilization and chemical conversion elements.
Year: 2014
Country: CN
Doc No: 103554372