食品科学 ›› 2007, Vol. 28 ›› Issue (7): 88-91.

• 工艺技术 • 上一篇    下一篇

新型淀粉基全生物降解薄膜的研究

 卢金珍, 熊汉国, 艾义   

  1. 华中农业大学食品科学技术学院; 华中农业大学食品科学技术学院 湖北武汉430070武汉生物工程学院生物工程一系; 湖北武汉430415; 湖北武汉430070;
  • 出版日期:2007-07-15 发布日期:2011-10-24

Study on New Starch-based Full-biodegradable Films

 LU  Jin-Zhen, XIONG  Han-Guo, AI  Yi   

  1. 1.College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; 2.The 1st Department of Bioengineering, Wuhan Bioengineering College, Wuhan 430415, China
  • Online:2007-07-15 Published:2011-10-24

摘要: 以玉米淀粉为主要原料,研究了纳米SiO2改性淀粉薄膜的最佳分散处理工艺,并通过红外光谱、X-射线衍射和扫描电镜对该膜的结构进行了分析。结果表明:纳米SiO2的最佳分散工艺为2%纳米SiO2(占淀粉和聚乙烯醇干重)分散液中加入1.5%聚丙烯酰胺(PA)(指占纳米SiO2干重),先用机械力研磨分散1h,然后置入淀粉-聚乙烯醇(ST-PVA)共混液中;所制备的薄膜的各项性能均得到大幅度提高,其中拉伸强度可达34.82MPa,断裂伸长率为331%,达到国标GB4456-84所规定的标准;纳米SiO2在淀粉和聚乙烯醇分子间形成了均一致密的交联网状结构。该研究结果为纳米SiO2改性玉米淀粉制备一次性全生物降解薄膜,消除“白色污染”提供了一定的理论依据和实际应用参考。

关键词: 玉米淀粉, 纳米SiO2, 全生物降解, 薄膜, 分散剂

Abstract: With corn starch as raw material, the optimal dispersing method of starch film modified by nano-silica was studied. And the structure of the films was analyzed by infrared spectroscopy (IR), X-ray diffraction and scanning electron micrography (SEM). The results showed that the dispersion liquor, with nano-silica 2% (of starch and PVA) and PA dispersant 1.5% (of nano- silica), is obtained by mechanical grinding dispersion for 1 h. Then the dispersion liquor is put in the blend solution of ST-PVA. Properties of starch films are improved remarkably by adding a little amount of nano-silica. The tensile strength and breaking elongation of the film are 34.82 MPa and 331% respectively, which meet the national standard GB4456-84. A dense and homogeneous network is generated. The conclusion in the research will provide theoretical base and practical references for making full-biodegradable film with corn starch and nano-silica to eliminate “white pollution” problem.

Key words: corn starch, nano-silica, full-biodegradation, film, dispersant