淀粉基生物降解材料的制备及其力学性能的研究

Preparation and Mechanical Properties of Starch Based Biodegradable Materials

以淀粉、PVA、水、甘油和硼砂为原料制备了淀粉基全降解材料,对其力学性能进行了研究。结果表明,以30份水做增塑剂,加入25份PVA时,材料的拉伸强度和断裂伸长率分别从纯淀粉的25.80 MPa和1.11%提高到31.78 MPa和6.24%,硼砂可以使PVA和淀粉发生交联,制得材料的拉伸强度可达43.37 MPa;甘油的加入虽可以使材料的断裂伸长率提高,但拉伸强度明显降低;同时加入硼砂和甘油,材料的拉伸强度和断裂伸长率分别提高到36.26 MPa和11.71%。

A biodegradable material was prepared by blending corn starch with poly（vinyl alcohol） （PVA）, water, and glycol. With 25 phr of PVA and 30 phr of water, the tensile strength and elongation at break increased from 25.80 MPa and 1.11% for neat corn starch to 31.78 MPa and 6.24 %. When borax and glycol were added, the tensile strength and elongation at break were further increased to 36.26 MPa and 11.71%, respectively.