Abstract In this work, the Pickering emulsion template method was used to introduce lignin nanoparticles into poly(lactic acid) (PLA) with improved dispersion. The effect of lignin as the stabilizer of Pickering emulsions was studied in this paper, including the thermal, rheological and mechanical properties of the blends. The PLA/lignin films had reduced light transmission in the UV light region, and Young’s modulus of PLA/lignin blends increased, while their tensile strength and elongation-at-break decreased as compared to neat PLA film. The introduction of lignin improved crystallinity of PLA from 7.5% to over 15%, and increased its decomposition temperature by about 10 °C. The lignin in the blends prepared using the Pickering emulsion template approach had much larger load bearing capacity than the dispersed lignin particles in the usual melt blended material. All the results indicated that the Pickering emulsion template method improves the dispersion of lignin (over 5.0 wt%) in PLA and improves UV protection, crystallinity, decomposition temperature and Young’s modulus of PLA.

中文翻译：

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用 Pickering 乳液模板方法制备的聚（乳酸）/木质素混合物

摘要 在这项工作中，采用 Pickering 乳液模板法将木质素纳米粒子引入聚乳酸 (PLA) 中，并改善了分散性。本文研究了木质素作为Pickering乳液稳定剂的作用，包括共混物的热性能、流变性能和机械性能。PLA/木质素薄膜在紫外光区域的透光率降低，PLA/木质素共混物的杨氏模量增加，而与纯 PLA 薄膜相比，它们的拉伸强度和断裂伸长率降低。木质素的引入将 PLA 的结晶度从 7.5% 提高到 15% 以上，并将其分解温度提高了约 10 °C。使用 Pickering 乳液模板方法制备的共混物中的木质素比通常熔融共混材料中分散的木质素颗粒具有更大的承载能力。所有结果表明，Pickering 乳液模板法改善了木质素（超过 5.0 wt%）在 PLA 中的分散，并提高了 PLA 的紫外线防护、结晶度、分解温度和杨氏模量。