• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Properties of films from corn zein reacted with glutaraldehyde
【24h】

Properties of films from corn zein reacted with glutaraldehyde

机译：玉米醇溶蛋白与戊二醛反应的薄膜性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To improve the mechanical properties of zein films, a commercial white zein was reacted in glacial acetic acid (HAc) with glutaraldehyde (GDA) from 0.5 to 16% by weight based on the weight of zein. Amounts of 4% or higher GDA-modified zein, when cured in a closed system, generated a gel. That gel was insoluble in organic solvents known to solubilize zein. Zein solutions cast within a silicon rubber gasket sealed onto Teflon-coated plates, when air dried, generated 0.7-0.9-mm thick films. Those films from 8% GDA-modified zein had a water vapor permeability of 5.9 x 10(-8) g cm/Pa s m(2). Overall, results indicate that our thicker films gave higher water vapor permeability than values reported in the literature. To achieve consistent and comparable results with differential scanning calorimetry (DSC) and dynamic mechanical analyses (DMA), film samples had to be heated to remove residual HAc. An increase in the glass transition temperatures for those films from GDA-modification of zein, observed with both DSC and DMA, was attributed to the crosslinking of zein. Physical testing of tensile bars cut from GDA-modified zein films showed minor enhancement of tensile strength, percent elongation, and Young's modulus in the 0.5% GDA-modified zein films, which increased and leveled off with 4% or higher amounts of GDA for the modifications. When the 4 to 16% GDA results are averaged, the tensile strength for the modified zein films increased 1.8-fold when compared with unmodified zein control films. On the same note, percent elongation showed a 1.8-fold increase and Young's modulus showed a 1.5-fold increase. GDA reaction with zein generated films with improved tensile strength, ductility, and stiffness when compared with respective zein control films that retained their integrity when subjected to either boiling water or extensive soaking. (C) 2007 Wiley Periodicals, Inc.
机译：为了改善玉米蛋白膜的机械性能，使商品的白色玉米蛋白在冰醋酸（HAc）中与戊二醛（GDA）反应，以玉米蛋白的重量计为0.5至16重量％。当在封闭系统中固化时，4％或更高含量的GDA改性玉米醇溶蛋白会生成凝胶。该凝胶不溶于已知可溶解玉米蛋白的有机溶剂。玉米蛋白溶液浇铸在密封在聚四氟乙烯涂层板上的硅橡胶垫片中，风干后会产生0.7-0.9-mm厚的薄膜。这些由8％GDA改性玉米醇溶蛋白制成的薄膜的水蒸气透过率为5.9 x 10（-8）g cm / Pa s m（2）。总体而言，结果表明我们的较厚薄膜提供的水蒸气渗透性高于文献中报道的值。为了通过差示扫描量热法（DSC）和动态力学分析（DMA）获得一致且可比的结果，必须加热薄膜样品以去除残留的HAc。用DSC和DMA观察到的玉米醇溶蛋白的GDA-改性对那些膜的玻璃化转变温度的升高归因于玉米醇溶蛋白的交联。从GDA改性玉米醇溶蛋白薄膜切割的拉伸棒的物理测试显示，在0.5％GDA改性玉米醇溶蛋白薄膜中，拉伸强度，伸长率和杨氏模量略有提高，对于GDA改性玉米醇溶蛋白膜，GDA含量为4％或更高时，其增加和趋于稳定。修改。当平均4-16％的GDA结果时，与未改性的玉米蛋白对照膜相比，改性的玉米蛋白膜的拉伸强度增加了1.8倍。同样，伸长百分比显示出1.8倍的增加，杨氏模量显示出1.5倍的增加。与相应的玉米蛋白对照膜相比，与玉米蛋白的GDA反应生成的薄膜具有改善的拉伸强度，延展性和刚度，而玉米蛋白对照膜在经过沸水或大量浸泡后仍保持其完整性。 （C）2007 Wiley期刊公司

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号