• 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 >Development and evaluation of a novel pH indicator biodegradable film based on cassava starch
【24h】

Development and evaluation of a novel pH indicator biodegradable film based on cassava starch

机译：基于木薯淀粉的新型pH指示剂可生物降解膜的研制与评价

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

A pH indicator film based on cassava starch plasticized with sucrose and inverted sugar and incorporated with grape and spinach extracts as pH indicator sources (anthocyanin and chlorophyll) has been developed, and its packaging properties have been assessed. A second-order central composite design (2 2) with three central points and four star points was used to evaluate the mechanical properties (tensile strength, tensile strength at break, and elongation at break percentage), moisture barrier, and microstructure of the films, and its potential as a pH indicator packaging. The films were prepared by the casting technique and conditioned under controlled conditions (75% relative humidity and 23°C), at least 4 days before the analyses. The materials were exposed to different pH solutions (0, 2, 7, 10, and 14) and their color parameters (L*, a*, b*, and haze) were measured by transmittance. Grape and spinach extracts have affected the material characterization. Film properties (mechanical properties and moisture barrier) were strongly influenced by extract concentration presenting lower results than for the control. Films containing a higher concentration of grape extract presented a greater color change at different pH's suggesting that anthocyanins are more effective as pH indicators than chlorophyll or the mixture of both extracts.
机译：已经开发了一种基于木薯淀粉的蔗糖和倒糖增塑的pH指示剂膜，并掺入了葡萄和菠菜提取物作为pH指示剂源（花青素和叶绿素），并对其包装性能进行了评估。使用具有三个中心点和四个星形点的二阶中心复合材料设计（2 2）来评估薄膜的机械性能（拉伸强度，断裂拉伸强度和断裂伸长率），防潮层和微观结构，以及其作为pH指示剂包装的潜力。通过流延技术制备膜，并在分析之前至少4天在受控条件（75％相对湿度和23℃）下调节膜。将材料暴露于不​​同的pH溶液（0、2、7、10和14），并通过透射率测量其颜色参数（L *，a *，b *和雾度）。葡萄和菠菜提取物影响了材料的表征。膜的性能（机械性能和防潮性能）受到提取物浓度的强烈影响，呈现出比对照更低的结果。含有较高浓度葡萄提取物的薄膜在不同pH值下表现出更大的颜色变化，这表明花青素作为叶绿素或两种提取物的混合物的pH指示剂更有效。

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