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Reinforcement of aligned cellulose fibers by lignin-polyester copolymers
Materials Today Chemistry ( IF 6.7 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.mtchem.2020.100358
P.L. Chee , P.Y. Michelle Yew , D. Kai , X.J. Loh

Abstract With an ever-increasing attention on the climate change and the growing amount of plastic wastes generated, the search for an alternative to the petroleum-based plastics has never been as imperative. Inspired by the structure of natural wood, we aim to reproduce artificial equivalent using modified lignin and cellulose acetate. As natural wood are made up of an aggregation of fibers, electrospinning was used to produce the fiber component. Besides exploring the influence of various polymers on the properties of the eventual fibers, its properties were also examined in terms of its orientation – random and aligned. The addition of lignin copolymers was shown to remarkably improve the tensile strength and the Young’s modulus of cellulose acetate fibers up to 500% and 7,000% respectively. In contrast to the random fibers, the aligned fibers demonstrated better tensile strength and Young’s modulus which could be attributed to the higher crystallinity. Among the fibers, the longitudinal aligned C.A. + Lig-PHB fibers exhibited the best tensile strength and Young’s modulus which could be explored for load bearing applications.

中文翻译:

通过木质素-聚酯共聚物增强排列的纤维素纤维

摘要 随着对气候变化的日益关注和产生的塑料废物数量不断增加,寻找石油基塑料的替代品从未如此迫切。受天然木材结构的启发,我们的目标是使用改性木质素和醋酸纤维素复制人造等效物。由于天然木材由纤维聚集体组成,因此使用静电纺丝来生产纤维成分。除了探索各种聚合物对最终纤维性能的影响外,还根据其取向(随机和对齐)检查了其性能。木质素共聚物的加入显着提高了醋酸纤维素纤维的拉伸强度和杨氏模量,分别高达 500% 和 7,000%。与随机纤维相比,排列的纤维表现出更好的拉伸强度和杨氏模量,这可能归因于更高的结晶度。在纤维中,纵向排列的 CA + Lig-PHB 纤维表现出最好的拉伸强度和杨氏模量,可用于承载应用。
更新日期:2020-12-01
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