Colorimetric Humidity Sensors Based on Electrospun Polyamide-CoCl2 Nanofibrous MembranesReportar como inadecuado

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Nanoscale Research Letters

, 12:360

First Online: 19 May 2017Received: 12 April 2017Accepted: 11 May 2017DOI: 10.1186-s11671-017-2139-0

Cite this article as: You, MH., Yan, X., Zhang, J. et al. Nanoscale Res Lett 2017 12: 360. doi:10.1186-s11671-017-2139-0


Humidity indicators based on composite polyamide 66-cobalt chloride PA66-CoCl2 nanofibrous membranes NFMs were successfully fabricated by electrospinning. A series of NFMs with various weight percentage of CoCl2 to PA66 were prepared, and their humidity sensitivity based on color changing and quartz crystal microbalance QCM were studied. Due to the color change property of cobalt chloride, the as-spun composite NFMs show obviously macroscopic color change from blue to pink as relative humidity RH increasing from 12.4 to 97.2%. Moreover, the QCM detection showed a linear dependence on the RH changing and exhibited short response-recovery time less than 65.4 s-11 s, small hysteresis less than 11%, good reproducibility, and stability. Owing to the above double sensitive mechanism on RH, the PA66-CoCl2 composite NFM may show great potential applications from meticulous to coarse.

KeywordsColorimetric humidity sensor Electrospinning PA66-CoCl2 nanofibrous membranes Electronic supplementary materialThe online version of this article doi:10.1186-s11671-017-2139-0 contains supplementary material, which is available to authorized users.

Autor: Ming-Hao You - Xu Yan - Jun Zhang - Xiao-Xiong Wang - Xiao-Xiao He - Miao Yu - Xin Ning - Yun-Ze Long


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