• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Molecules >Tailoring the Properties of Thermo-Compressed Polylactide Films for Food Packaging Applications by Individual and Combined Additions of Lactic Acid Oligomer and Halloysite Nanotubes
【2h】

Tailoring the Properties of Thermo-Compressed Polylactide Films for Food Packaging Applications by Individual and Combined Additions of Lactic Acid Oligomer and Halloysite Nanotubes

机译：通过单独和组合添加乳酸低聚物和埃洛石纳米管来调整食品包装用热压聚乳酸薄膜的性能

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work, films of polylactide (PLA) prepared by extrusion and thermo-compression were plasticized with oligomer of lactic acid (OLA) at contents of 5, 10, and 20 wt%. The PLA sample containing 20 wt% of OLA was also reinforced with 3, 6, and 9 parts per hundred resin ( ) of halloysite nanotubes (HNTs) to increase the mechanical strength and thermal stability of the films. Prior to melt mixing, ultrasound-assisted dispersion of the nanoclays in OLA was carried out at 100 °C to promote the HNTs dispersion in PLA and the resultant films were characterized with the aim to ascertain their potential in food packaging. It was observed that either the individual addition of OLA or combined with 3 of HNTs did not significantly affect the optical properties of the PLA films, whereas higher nanoclay contents reduced lightness and induced certain green and blue tonalities. The addition of 20 wt% of OLA increased ductility of the PLA film by nearly 75% and also decreased the glass transition temperature ( ) by over 18 °C. The incorporation of 3 of HNTs into the OLA-containing PLA films delayed thermal degradation by 7 °C and additionally reduced the permeabilities to water and limonene vapors by approximately 8% and 47%, respectively. Interestingly, the highest barrier performance was attained for the unfilled PLA film plasticized with 10 wt% of OLA, which was attributed to a crystallinity increase and an effect of “antiplasticization”. However, loadings of 6 and 9 of HNTs resulted in the formation of small aggregates that impaired the performance of the blend films. The here-attained results demonstrates that the properties of ternary systems of PLA/OLA/HNTs can be tuned when the plasticizer and nanofiller contents are carefully chosen and the resultant nanocomposite films can be proposed as a bio-sourced alternative for compostable packaging applications.
机译：在这项工作中，通过挤出和热压制备的聚丙交酯（PLA）薄膜用乳酸（OLA）的低聚物以5、10和20 wt％的含量增塑。相对于每百份树脂（）埃洛石纳米管（HNT），每3份，6份和9份也可增强含有20 wt％OLA的PLA样品，以提高薄膜的机械强度和热稳定性。在熔融混合之前，先在100°C的超声辅助下将纳米粘土分散在OLA中，以促进HNT在PLA中的分散，然后对所得膜进行表征，以确认其在食品包装中的潜力。观察到单独添加OLA或与3种HNT结合均不会显着影响PLA膜的光学性能，而较高的纳米粘土含量会降低亮度并引起某些绿色和蓝色色调。添加20 wt％的OLA可将PLA薄膜的延展性提高近75％，并使玻璃化转变温度（）降低18°C以上。将3种HNT掺入含OLA的PLA膜中可使热降解延迟7°C，并且另外使水和柠檬烯蒸气的渗透率分别降低约8％和47％。有趣的是，用10 wt％的OLA增塑的未填充PLA膜获得了最高的阻隔性能，这归因于结晶度的提高和“抗塑化”的作用。但是，加载6和9的HNT会导致形成小的聚集体，从而损害混合膜的性能。此处获得的结果表明，当精心选择增塑剂和纳米填料的含量时，可以调节PLA / OLA / HNTs三元体系的性能，并且可以将所得的纳米复合薄膜作为可堆肥包装应用的生物来源替代品。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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