High-performance completely biodegraded starch material and its prepn process

The present invention is high-performance completely biodegraded starch material and its preparation, and belongs to the field of material technology. The material of the present invention consists of starch 40-70 wt%, low molecular weight plasticizer 5-30 wt%, high molecular weight plasticizer 5-30 wt%, gelificated promoter 0-10 wt% and clay 0-10 wt%. It is prepared through simple smelting and blending. The preparation process is simple, flexible and efficient; and the prepared material may be formed via different modes. The product has low cost and excellent performance and may be used as packing material; and its use to replace available plastic packing material can solve the problem of 'white pollution' to protect environment. 一种高性能化全生物降解型淀粉材料及其制备方法，属于材料领域。本发明材料包含的组成及其重量百分比为：淀粉40-70％，低分子量增塑剂5-30％，高分子量增塑剂5-30％，凝胶化促进剂0-10％，粘土0-10％。本发明方法以淀粉为原料，通过增塑剂的复配塑化、凝胶化促进、粘土层间混杂增强实现全生物降解型淀粉材料的高性能化，使用简单熔融共混方法制备出高性能化全生物降解型淀粉材料。本发明制备方法简单、灵活、有效；制得材料可使用多种方法成型，满足多种成型塑料制品的制备需要；制得产品成本低，性能优良，可满足塑料包装材料的使用要求；制得产品可替代现有塑料包装制品，有效地解决"白色污染"的严重问题，满足环保需求，造福人类。