A composite of poly(ethylene oxide) (PEO) and lignin (Lg) was prepared and characterized for its utility as an ultraviolet (UV) absorbing material. Due to the extensive UV absorption and excellent oxidation‐resistance of Lg, the formation of hydrogen bonds between the Lg particles and the PEO molecular segments renders the Lg particles well‐dispersed in the PEO matrix. PEO/Lg composites with different Lg contents show that high levels of Lg could cause defects at the PEO/Lg composite interface. The viscosities of all composites were higher than that of pure PEO. Composite foams were further prepared under supercritical carbon dioxide conditions, all of which exhibited excellent UV‐absorption properties. This work provides a means toward convenient preparation of PEO composites with UV‐absorption ability and forms a theoretical basis for the dispersion of Lg in polymer matrices. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48593.

中文翻译：

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用于紫外线吸收的聚环氧乙烷/木质素复合材料的制备，结构和性能

制备了聚环氧乙烷（PEO）和木质素（Lg）的复合材料，并对其用作紫外线（UV）吸收材料的特性进行了表征。由于Lg具有广泛的紫外线吸收能力和出色的抗氧化性，因此Lg颗粒与PEO分子链段之间形成氢键，使Lg颗粒在PEO基体中分散良好。Lg含量不同的PEO / Lg复合材料表明，高含量的Lg可能会在PEO / Lg复合材料界面处引起缺陷。所有复合材料的粘度均高于纯PEO。在超临界二氧化碳条件下进一步制备了复合泡沫材料，所有这些泡沫材料均具有出色的紫外线吸收性能。这项工作为方便地制备具有紫外线吸收能力的PEO复合材料提供了一种手段，并为Lg在聚合物基质中的分散提供了理论基础。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学2020，137，48593。