聚乳酸/苯甲酸膨润土可再生降解膜的研究  

Renewable and biodegradable films synthesized with polylactic acid and Benzoate-Ca-bentonite

作　　者：付丽华[1] 黄昊英 

机构地区：[1]广西大学化学化工学院,广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2013年第6期1320-1325,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(20110815);广西石化资源加工及过程强化技术重点实验室主任基金(2012Z06)

摘　　要：为制备有良好降解性能的聚乳酸膜,以苯甲酸膨润土(BCB)和聚乳酸(PLA)为原料,通过溶液铸膜法制备聚乳酸/苯甲酸膨润土(PLA/BCB)可再生降解膜(简称复合膜),考察了复合膜的降解性能。实验结果表明:添加BCB可使复合膜的降解速度加快,且降解速度随着BCB添加量的增加而逐渐加快。对复合膜的制备工艺进行了研究,结果显示,常温下,以体积比为15/85的丙酮/氯仿混合液为溶剂,添加2%的有机含量为40%以上的BCB在PLA基体中反应36 h,在此条件下所制得的复合膜的性能最优,其拉伸强度和断裂伸长率分别为37.8MPa和39%,比PLA膜分别提高61%和54%。In able and biod order to achieve polylactic acid （PLA） films with good biodegradability, the renew- egradable films which were abbreviated as composite films, were synthesized by solu- tion casting method with PLA and benzoate-Ca-bentonite （BCB）. The biodegradability of composite films was investigated. Test results showed that the composite films could be biodegraded faster by adding BCB. And that the more the amount of BCB, the faster the films could be biodegraded. The preparation processes were studied. The optimal preparation processes are as follows： At room tem- perature, with solution of acetone and chloroform with the volume ratio of 15/85, organic content of BCB over 40% , the BCB/PLA mass ratio 2/98, the reaction time 36 h. The properties of composite film prepared in such optimal conditions are the best. The tensile strength and elongation at break are 37.8 MPa and 39% respectively. respectively, an increase of 61% and 54% compared to the pure PLA film

关 键 词：膨润土 聚乳酸 生物降解性能 

分 类 号：TB332[一般工业技术—材料科学与工程]