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首页> 外文期刊>Journal of Applied Polymer Science >Halloysite nanotubes grafted polylactic acid and its composites with enhanced interfacial compatibility
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Halloysite nanotubes grafted polylactic acid and its composites with enhanced interfacial compatibility

机译：Halloysite Nanitubes接枝聚乳酸及其复合材料，具有增强的界面相容性

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摘要

Polylactic acid (PLA) polymers are promising substitutes for polluting fossil fuel-derived polymers in the field of food safety due to their environmental friendliness, good biocompatibility, and degradability. However, their poor mechanical property limits their practical utilization. In this study, abundant natural halloysite nanotubes (HNTs) were incorporated into PLA to address these issues. To overcome interfacial incompatibility between the matrix (PLA) and nanofillers (HNTs), 3-Aminopropyltrimethoxysilane (APS) were firstly grafted onto HNTs to form end-up amino groups which were served as binding sites for the polycondensation of lactic acid precursors. This formed PLA modified HNTs (pHNTs) precursor was further mixed with bulk PLA polymers to prepare the composite films by the solvent casting method. Compared with the pristine composite, the PLA/pHNTs composites show better thermal stability and mechanical properties, and the composite with 2 wt% pHNTs exhibits the best performance.
机译：聚乳酸（PLA）聚合物具有良好的环境友好性、生物相容性和可降解性，在食品安全领域是污染化石燃料衍生聚合物的有前途的替代品。然而，它们较差的力学性能限制了它们的实际应用。在这项研究中，大量的天然埃洛石纳米管（HNTs）被纳入PLA以解决这些问题。为了克服基质（PLA）和纳米填料（HNTs）之间的界面不相容性，首先将3-氨基丙基三甲氧基硅烷（APS）接枝到HNTs上，形成末端氨基，作为乳酸前体缩聚的结合位点。将所形成的PLA改性HNTs（pHNTs）前驱体进一步与本体PLA聚合物混合，通过溶剂浇铸法制备复合膜。与原始复合材料相比，PLA/pHNTs复合材料表现出更好的热稳定性和力学性能，并且含有2 wt%pHNTs的复合材料表现出最好的性能。

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