Abstract A combination of solution casting and melt extrusion technique was used to fabricate Boron nitride (BN)-filled Polylactic acid (PLA)/polybutylene adipate terephthalate (PBAT) blend composites. The BN particles were surface treated with a silane coupling agent and functionalization was confirmed via spectroscopic analysis. Field emission scanning electron microscopy confirmed that the BN surface treatment improved the particle adhesion with the polymer matrices and acted as a compatibilizer for the polymers. Moreover, changes in the particle orientation in the blend composite yielded improved thermal conductivity in different directions. The inclusion of the treated BN particles enhanced the in-plane (~1.1 W m−1K−1) and through-plane (~0.8 W m−1K−1) thermal conductivity of the composites as compared to the neat PLA. In addition, the storage modulus of the composite become more than 3 GPa that is twice that of the PLA/PBAT blend with a reasonable tensile property. In general, compared with the PLA/PBAT blend, the blend composites exhibited superior thermal and mechanical properties.

中文翻译：

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取向和表面处理氮化硼填充聚乳酸/聚己二酸对苯二甲酸丁二醇酯三元复合材料的定向导热性增强

摘要 采用溶液浇铸和熔体挤出技术相结合的方法制备了氮化硼 (BN) 填充的聚乳酸 (PLA)/聚己二酸对苯二甲酸丁二醇酯 (PBAT) 共混复合材料。用硅烷偶联剂对 BN 颗粒进行表面处理，并通过光谱分析确认功能化。场发射扫描电子显微镜证实，BN 表面处理提高了颗粒与聚合物基质的粘附力，并作为聚合物的增容剂。此外，共混复合物中颗粒取向的变化在不同方向上产生了改进的热导率。与纯 PLA 相比，包含处理过的 BN 颗粒提高了复合材料的面内（~1.1 W m-1K-1）和面内（~0.8 W m-1K-1）热导率。此外，复合材料的储能模量超过 3 GPa，是 PLA/PBAT 共混物的两倍，具有合理的拉伸性能。一般而言，与 PLA/PBAT 共混物相比，共混复合材料表现出优异的热性能和机械性能。