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天然纤维素纳米原纤/碳纳米管杂化气凝胶在循环压缩下的电学行为

Electrical behaviour of native cellulose nanofibril/carbon nanotube hybrid aerogels under cyclic compression.

作者信息

Wang Miao, Anoshkin Ilya V, Nasibulin Albert G, Ras Robin H A, Laine Janne, Kauppinen Esko I, Ikkala Olli

机构信息

Department of Applied Physics , School of Science , Aalto University , P. O. Box 15100 , FI-00076 Espoo , Finland . Email:

Skolkovo Insititute of Science and Technology , Nobel str. 3 , Moscow , 143026 , Russia.

出版信息

RSC Adv. 2016 Sep 19;6(92):89051-89056. doi: 10.1039/c6ra16202a. Epub 2016 Sep 5.

DOI:10.1039/c6ra16202a
PMID:28496970
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5361171/
Abstract

Hybrid aerogels consisting of cellulose nanofibers (CNF) and modified few-walled carbon nanotubes (FWCNT) are investigated under cyclic mechanical compression to explore "electrical fatigue". For this purpose the FWCNTs were hydrophilized, thus promoting their aqueous dispersibility to allow FWCNT/CNF hybrid hydrogels, followed by freeze-drying to obtain hybrid aerogels. The optimized composition consisting of FWCNT/CNF 20/80 wt/wt showed conductivity of 10 S cm as promoted due to double percolation, and showed only small changes in electrical and mechanical behaviour upon cycling 100 times. The electrical behaviour under cycled compression shows good stability and reversibility.

摘要

对由纤维素纳米纤维（CNF）和改性少壁碳纳米管（FWCNT）组成的混合气凝胶进行循环机械压缩研究，以探索“电疲劳”。为此，对FWCNT进行了亲水化处理，从而提高其在水中的分散性，以制备FWCNT/CNF混合水凝胶，然后通过冷冻干燥获得混合气凝胶。由FWCNT/CNF 20/80 wt/wt组成的优化组合物由于双重渗滤作用，显示出10 S cm的电导率，并且在循环100次后，其电学和力学性能仅发生微小变化。循环压缩下的电学行为显示出良好的稳定性和可逆性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d12/5361171/36393f9f19d5/c6ra16202a-f7.jpg
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