Circular poly(ethylene terephthalate) with lignin-based toughening additives

文献类型： 外文期刊

第一作者： Wan, Xue

作者： Wan, Xue;Shen, Fei;Wan, Xue;Liu, Li-Yang;Karaaslan, Muzaffer A.;Hua, Qi;Renneckar, Scott;Liu, Li-Yang;Liu, Li-Yang;Liu, Li-Yang;Sipponen, Mika;Sipponen, Mika;Wan, Xue

作者机构：

关键词： Poly (ethylene terephthalate); Lignin; Modification; Circularity; Toughening additives

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 504 卷

页码：

收录情况： SCI

摘要： Creating sustainable plastics demands an efficient strategy to reduce the carbon footprint and enhance the circularity of widely used materials. Inspired by the structure of plant cell walls, renewable lignin macromolecules are modified with benzoate ethyl functional groups and combined with semi-crystalline poly(ethylene terephthalate) (PET) at a 10 % weight ratio. This process significantly improves the toughness (+97 %) and strength (+ 56 %) of PET while also reducing greenhouse gas emissions (-17 %) and promoting circularity, outperforming traditional toughening agents. Our in-depth analysis indicates that benzoate ethyl lignin derivatives exhibit improved thermal stability and controllable physical structure. The newly added benzoate ethyl groups are similar to the fundamental units in PET, facilitating the formation of micro-scale particles within the PET matrix and improving their crystallinity and mechanical performance. The resulting composite can be reprocessed at least three times, representing a significant breakthrough in mechanical processing of thermoplastics. Therefore, this study presents a promising approach to utilizing lignin biopolymer and waste PET for advanced materials with positive environmental footprints.

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