Green Fabrication of Regenerated Cellulose/Graphene Films with Simultaneous Improvement of Strength and Toughness by Tailoring the Nanofiber Diameter,ACS Sustainable Chemistry & Engineering

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Green Fabrication of Regenerated Cellulose/Graphene Films with Simultaneous Improvement of Strength and Toughness by Tailoring the Nanofiber Diameter
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-11-29 00:00:00 , DOI: 10.1021/acssuschemeng.7b03608
Tongping Zhang ₁ , Xiaofang Zhang ₁ , Yuwei Chen ₁ , Yongxin Duan ₁ , Jianming Zhang ₁

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The development of green and facile synthesis techniques for flexible, transparent, and conductive films (FTCFs) is in great demand with the rapid consumption of electronics. Herein, we report the environmentally friendly and one-pot fabrication of regenerated cellulose nanofibers (CNFs)/graphene FTCFs directly from raw materials of cellulose and graphite based on ionic liquid. Prepared FTCFs exhibit simultaneous and extraordinary improvement of tensile strength (135.4%) and toughness (459.1%) with graphene loading of only 0.1 wt %. In addition to the contribution of graphene sheets as reinforced filler, the morphology analysis reveals that the diameter size of regenerated CNF plays the key role in tailoring the mechanical properties of regenerated CNF/graphene film. Meanwhile, our results show that the diameter of regenerated CNF is dependent on the dispersion state of graphene sheets. The disruptive self-assembly of cellulose molecules in the regeneration process induced by the hydrophobic interaction between graphene sheets and cellulose chains is proposed to explain the reduction of diameter size of regenerated CNF in the presence of graphene. The high performance FTCFs fabricated by such a simple and green strategy have potential in large-scale industrial applications.

中文翻译：

通过定制纳米纤维直径，绿色制备再生纤维素/石墨烯薄膜，同时提高强度和韧性

随着电子产品的快速消费，对柔性，透明和导电膜（FTCF）的绿色环保的合成技术的发展提出了很高的要求。在此，我们报告了一种直接从纤维素和石墨的原料基于离子液体的环保，一锅法制备再生纤维素纳米纤维（CNF）/石墨烯FTCF的方法。制备的FTCF表现出同时且非凡的拉伸强度（135.4％）和韧性（459.1％）的改善，而石墨烯的负载量仅为0.1 wt％。形态分析表明，除了石墨烯片作为增强填料外，再生CNF的直径尺寸在调整再生CNF /石墨烯薄膜的机械性能中起着关键作用。同时，我们的结果表明，再生CNF的直径取决于石墨烯片的分散状态。提出了由石墨烯片和纤维素链之间的疏水相互作用引起的纤维素分子在再生过程中的破坏性自组装，以解释在石墨烯存在下再生CNF的直径尺寸的减小。通过这种简单而绿色的策略制造的高性能FTCF在大规模工业应用中具有潜力。

更新日期：2017-11-29

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