Poly(lactic acid) (PLA), one of the most promising biodegradable polymer products, has achieved wide applications for its relatively good mechanical properties and moderate degradability. Here we report an environment-friendly filler, the organic–inorganic composite Janus nanosheets (PLA/PBS JNs), which can jam at the interface of the PLA/PBS blend with a low threshold as the compatibilizer and can simultaneously toughen the composites and improve the gas barrier performance due to better interfacial interaction and tortuous path effect. With 0.3 wt % of PLA/PBS JNs added, the tensile strength and elongation at break of the PLA/PBS blend can be improved by 37% and 224%, respectively. After a further hot-pressing process, the barrier performance of the PLA/PBS composite membranes can be significantly enhanced since PLA, PLA/PBS JNs, and PBS are arranged in a nearly lamellar structure with oxygen permeability of 0.63 × 10^–15 cm³ cm·cm^–2 s^–1 Pa^–1 with only 0.5 wt % of PLA/PBS JNs.

中文翻译：

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由各向异性 Janus 纳米片增容剂制备的聚乳酸/聚丁二酸丁二醇酯 (PLA/PBS) 层状复合阻气膜

聚乳酸（PLA）是最有前途的可生物降解聚合物产品之一，以其相对良好的机械性能和适度的可降解性获得了广泛的应用。在这里，我们报告了一种环保填料，有机-无机复合材料 Janus 纳米片 (PLA/PBS JNs)，它可以作为增容剂以低阈值堵塞 PLA/PBS 混合物的界面，同时可以增韧复合材料并改善由于更好的界面相互作用和曲折路径效应，气体阻隔性能。添加 0.3 wt% 的 PLA/PBS JN 后，PLA/PBS 共混物的拉伸强度和断裂伸长率可分别提高 37% 和 224%。经过进一步的热压工艺，PLA/PBS 复合膜的阻隔性能可以显着提高，因为 PLA、PLA/PBS JN、^–15 cm ³ cm·cm ^–2 s ^–1 Pa ^–1只有 0.5 wt % 的 PLA/PBS JN。