中国塑料 ›› 2014, Vol. 28 ›› Issue (10): 36-39 .DOI: 10.19491/j.issn.1001-9278.2014.10.008

• 材料与性能 • 上一篇    下一篇

生物降解复合膜的制备及其性能研究

刘昌宁,郝艳玲,刘瑾瑾   

  1. 兰州交通大学化学与生物工程学院
  • 收稿日期:2014-03-28 修回日期:2014-07-02 出版日期:2014-10-26 发布日期:2014-10-26

Preparation and Properties of Biodegradable Composite Films

  • Received:2014-03-28 Revised:2014-07-02 Online:2014-10-26 Published:2014-10-26

摘要: 在氧化醋酸酯淀粉(PMS)和聚乙烯醇(PVA)的共混物中加入羧甲基纤维素(CMC)、海藻酸钠(SA)及AG(AG),采用流延工艺制备了降解复合薄膜,研究了CMC与SA的配比及AG的加入量对薄膜力学性能和耐水性能的影响,并用红外光谱和扫描电子显微镜对复合膜的结构和形貌进行了表征。结果表明,CMC和SA可有效地改善复合膜的力学性能和耐水性能,当CMC与SA质量比为1∶1时膜的拉伸强度达20.84 MPa,吸水率124.00 %,AG的加入能进一步提高膜的耐水性,吸水率降至83.35 %。

关键词: 氧化醋酸酯淀粉, 羧甲基纤维素, 海藻酸钠, AG, 生物降解, 薄膜

Abstract: Into a blend of oxidation acetate starch (PMS) and poly(vinyl alcohol) (PVA) carboxyl methyl cellulose (CMC), sodium alginate (SA), and agar (AG) were introduced, based on which a biodegradable composite film was prepared by casting method. The morphology of the composite membrane were characterized using infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). CMC and SA could effectively improve the mechanical properties and water resistance of the composite film. When the mass ratio of CMC and SA was 1∶1, the tensile strength reached 20.84 MPa and water absorption was 124.00 %. The water resistance of the film could be further improved by adding AG and the water absorption decreased to 83.35 %.

Key words: oxidized starch acetate, carboxymethyl cellulose, alginate, agar, biodegradable, film