Phosphate starch biodegradable film and preparation method thereof

• Main Authors: LIU BOYE, CHEN FUSHENG, LIU KUNLUN, WANG HONGJIE, GAO YANXIU, LIU LING, XU WEIHE, LI YANLEI, GUO DONGQUAN, HE LE, WANG HONGJUAN, ZHANG PENGLONG, YANG YINGYING, BU GUANHAO
• Format: Patent
• Language: Chinese; English
• Published: 20.06.2012
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AGRICULTURE; ANIMAL HUSBANDRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED; FISHING; FORESTRY; GENERAL PROCESSES OF COMPOUNDING; HANDLING THIN OR FILAMENTARY MATERIAL; HORTICULTURE; HUMAN NECESSITIES; HUNTING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TRAPPING; WATERING; WORKING-UP

The invention discloses a phosphate starch biodegradable film and a preparation method of the phosphate starch biodegradable film, and is characterized in that the phosphate starch biodegradable film contains starch, polyvinyl alcohol, glyoxal, urea, phosphoric acid and glycerol; and phosphate starch is a mixture of starch, glyoxal, phosphoric acid, urea and polyvinyl alcohol. The invention has the advantages as follows: starch is treated with an appropriate amount of modification cross-linking agent, so as to greatly improve the water resistance of plastics; pure starch has high brittleness,and an appropriate amount of plasticizer is adopted to enhance ductility of the film, which is more suitable for industrial mass production; the material is endowed with different mechanical properties by adjusting the contents of phosphoric acid and urea and the consumption of plasticizer, with high technological content and novelty; the preparation process adopts conventional plastic process equipment and method, has a