Preparation method of biodegradable carboxymethyl cellulose-based film

• Main Authors: XU YUBO, CHANG CHENYA, GAO SHUYAN, LIU NUO, YANG TIANFANG, ZHU YINXIAO, LIU QIAOQIAO, GE BINGCHENG, XU JUAN
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention discloses a preparation method of a biodegradable carboxymethyl cellulose-based thin film, relates to the field of preparation of carboxymethyl cellulose-based thin films, and aims to solve the problem that the water resistance and hydrophobicity of a carboxymethyl cellulose thin film in the prior art need to be improved. A carboxymethyl cellulose solution, a polyvinyl alcohol solution and citric acid are subjected to a cross-linking reaction under catalysis of sodium hypophosphite to improve hydrophobicity, and then palm wax and tween-80 are added to form a film. In order to further improve the hydrophobicity, the product can be soaked in a zinc chloride solution, ammonia water and a stearic acid ethanol solution and then dried. The purpose of improving the water resistance of the carboxymethyl cellulose-based film can be achieved, the hydrophobicity of the carboxymethyl cellulose-based film can be remarkably improved by introducing palm wax through Tween-80 emulsification, Zn (OH) 2 is introdu