• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Amino-Modified Halloysite Nanotubes to Reduce Polymer Degradation and Improve the Performance of Mechanically Recycled Poly(lactic acid)
【24h】

Amino-Modified Halloysite Nanotubes to Reduce Polymer Degradation and Improve the Performance of Mechanically Recycled Poly(lactic acid)

机译：氨基改性的埃洛石纳米管，可减少聚合物降解并提高机械回收的聚乳酸的性能

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

From an environmental point of view, mechanical recycling is, in general, a good end-of-life option for poly(lactic acid) (PLA), one of the most important biobased polymers. However, the degradation of PLA during the service life and, especially, during the mechanical recycling process, leads to a decrease in the properties of PLA, thus reducing the applications of the recycled plastic. The main aim of this work was to study the addition of small amounts of halloysite nanotubes, during the recycling step, as the basis of a cost-effective method for improving the properties of the recycled PLA. Raw halloysite was modified with an aminosilane, and 2% by weight of both raw and modified halloysite were melt compounded with PLA previously subjected to accelerated ageing. The addition of the nanotubes led to recycled materials with improved properties because halloysite reduces the degradation of PLA by blocking the carboxyl groups, generated during the ageing and washing steps, which catalyze the degradation during the recycling process. This effect was more intense in the silanized nanotubes, because the carboxyl groups were effectively blocked by acid-base interactions with the amino groups of the chemical modification. The properties of the recycled plastic with only 2 wt% of silanized halloysite were very close to those of the virgin plastic.
机译：从环境的角度来看，机械回收通常是最重要的生物基聚合物之一的聚乳酸（PLA）的良好使用寿命选择。然而，在使用寿命期间，尤其是在机械回收过程中，PLA的降解导致PLA的性能下降，从而减少了回收塑料的应用。这项工作的主要目的是研究在回收步骤中添加少量的埃洛石纳米管，以此作为提高回收的PLA性能的经济有效方法的基础。用氨基硅烷对未加工的埃洛石进行改性，然后将2％重量的未加工的埃洛石和改性的埃洛石与预先加速老化的PLA熔融混合。纳米管的添加导致具有改进的性能的再循环材料，因为埃洛石通过封闭老化和洗涤步骤中产生的羧基而减少了PLA的降解，而羧基在再生过程中催化了降解。这种作用在硅烷化的纳米管中更为强烈，因为羧基被酸碱与化学修饰的氨基的相互作用有效地封闭了。仅含2 wt％硅烷化埃洛石的再生塑料的性能与原始塑料非常接近。

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