PPC含量对挤压成型Zein/PPC膜性质的影响

食品科学 ›› 2012, Vol. 33 ›› Issue (19): 6-10.

PPC含量对挤压成型Zein/PPC膜性质的影响

李秀明，陈野*，王君予，于翠柳，张宁，杨叶

天津科技大学食品工程与生物技术学院

收稿日期:2011-08-25 修回日期:2012-07-28 出版日期:2012-10-15 发布日期:2012-09-17
通讯作者: 李秀明 E-mail:lxmjiang@163.com
基金资助:
国家自然科学基金资助项目

Effect of Polypropylene Carbonate Content on Properties of Extruded Zein-PPC Films

Received:2011-08-25 Revised:2012-07-28 Online:2012-10-15 Published:2012-09-17
Contact: Xiu-Ming LI E-mail:lxmjiang@163.com

摘要/Abstract

摘要： 以玉米醇溶蛋白(zein)和聚丙撑碳酸酯(PPC)为主原料，以甘油为可塑剂，利用挤压法制备Zein-PPC复合薄膜，并对复合薄膜的机械性能、形态学和结构进行研究。结果表明：PPC的引入提高了复合薄膜的拉伸强度，当PPC含量为30%时，其拉伸强度最大，为30.11MPa；应用Halsey方程，建立了拉伸强度与相对湿度关系模型；差示扫描量热仪(DSC)分析表明复合薄膜具有稳定的热特性；傅里叶变换红外光谱(FT-IR)和X射线衍射实验发现，复合薄膜中玉米醇溶蛋白的羧基与PPC中的羟基发生反应生成了酯键，保证了复合膜的稳定性。

关键词: 玉米醇溶蛋白, 聚丙撑碳酸酯, 复合薄膜, 机械特性, 扫描电子显微镜

Abstract: Glycerol was used as a plasticizer to prepare zein-PPC films from zein and polypropylene carbonate (PPC) by extrusion. The mechanical characteristics, morphology and structure of zein-PPC films were studied. The tensile strength of zein-PPC films was enhanced by adding PPC and reached maximum level (30.11 MPa) at a PPC content of 30%. A Halsey model reflecting the relationship the tensile strength of zein-PPC films and relative humidity was established. The composite films had stable thermal properties as demonstrated by differential scanning calorimetry (DSC) analysis. FT-IR and X-ray analyses indicated the formation of ester bonds from carboxyl groups in zein and hydroxyl groups in PPC, maintaining the stability of zein-PPC films.

Key words: zein, polypropylene carbonate (PPC), film, mechanical characteristics, scanning electron microscopy (SEM)

中图分类号:

TQ321.4

李秀明，陈?野*，王君予，于翠柳，张?宁，杨?叶. PPC含量对挤压成型Zein/PPC膜性质的影响[J]. 食品科学, 2012, 33(19): 6-10.

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