PREPARATION AND CHARACTERIZATION OF MODIFIED STARCH-BASED BIODEGRADABLE MATERIALS EINFORCED WITH PULP FIBER

Native com starch and hydroxypropyl starch (HPS)based plastic films were prepared using the short pulp fiber as reinforcement and the glycerol as the plasticizer. The results of tensile test showed that the tensile strength and the elongation at break increased with the pulp contents. With the glycerol contents,the elongation at break increased considerably, but the tensile strength decreased. The water uptake of the films decreased with the pulp contents and hydroxypropylation, but increased with the glycerol contents. So it is concluded that the films was reinforced by pulp fiber and hydroxypropylation.     

PREPARATION AND CHARACTERIZATION OF MODIFIED STARCH-BASED BIODEGRADABLE MATERIALS REINFORCED WITH PULP FIBER

INTRODUCTIONThe developments of environmentally friendly polymeric are classified into two categories: the degradable synthetic polymers (PCL [1- 2], PLA and PVA [3], etc.) and the renewable natural polymers (chitin, pectin, cellulose [4-7] and starch [8], etc.) Among these, starch has been considered for many years as a polymer with a high potential for packaging application because of low cost, renewability and biodegradability. It usually has two major components and appears as a mi…     

羟丙基马铃薯淀粉制备的优化研究

以马铃薯淀粉为原料 ,在碱催化条件下 ,以硫酸钠作为膨胀抑制剂 ,在水悬浮液中和环氧丙烷进行反应。应用正交试验和统计分析 ,确定了一组制备羟丙基马铃薯淀粉的优化实验条件。实验结果表明 ,在最优工艺组合条件下 ,产品的醚化度为 0 .1 45 6,落在本研究预测的变动范围内。