Cellulose fibres with carbon nanotube networks for water sensing
Cellulose fibres with carbon nanotube networks for water sensing
复制标题
DOI：
10.1039/c3ta14820c
复制
发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Maeder, Edith
中科院分区：
文献类型：
--
作者：
Qi, Haisong;Liu, Jianwen;Maeder, Edith
导电纤维素基纤维是通过使用简单且可扩展的浸涂在表面上沉积多壁碳纳米管（MWNTs）来制造的。通过扫描电镜、拉伸测试和电阻测量等方法对纤维的形貌、力学性能和导电性能进行了研究。通过改变浸涂条件，单根MWNT-纤维素纤维的电阻（R-L）可控制在50-200 000 k Ω·cm（-1）的宽范围内。详细研究了这些光纤对液态水的传感行为。结果表明，它们对水具有快速响应、高灵敏度和良好的重现性，其相对电阻变化约为100-8000%，取决于初始电阻。有人提出，由纤维素纤维的溶胀效应引起的MWNT网络的断开是主导机制。此外，还研究了MWNT-纤维素纤维对电解质溶液的敏感性。
Electroconductive cellulose-based fibres were fabricated by depositing multi-walled carbon nanotubes (MWNTs) on the surface using a simple and scalable dip coating. The morphology, mechanical properties and conductive properties of the resultant MWNT-cellulose fibres were investigated by scanning electron microscopy, tensile testing and electrical resistance measurement, respectively. The resistance (R-L) of the single MWNT-cellulose fibre can be controlled in a wide range of 50-200 000 k Omega cm(-1) by varying the conditions of dip coating. The sensing behaviour of these fibres to liquid water was investigated in detail. The results showed that they exhibit rapid response, high sensitivity and good reproducibility to water, with a relative electrical resistance change of about 100-8000% depending on the initial resistance. It was proposed that the disconnection of MWNT networks caused by swelling effects of the cellulose fibres is the dominant mechanism. Moreover, the sensitivity of the MWNT-cellulose fibres to an electrolyte solution was also investigated.