Environmentally-friendly conductive cotton fabric as flexible strain sensor based on hot press reduced graphene oxide
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Ren, J., Wang, C., Zhang, X., Carey, T., Chen, K., Yin, Y., & Torrisi, F. (2017). Environmentally-friendly conductive cotton fabric as flexible strain sensor based on hot press reduced graphene oxide. Carbon, 111 622-630. https://doi.org/10.1016/j.carbon.2016.10.045
A flexible conductive cotton fabric was demonstrated by formulation and deposition of a graphene oxide (GO) dispersion onto a cotton fabric by vacuum filtration. The deposited GO amount was controlled by the concentration and volume of the GO dispersion. The GO was reduced by a hot press method at 180 °C for 60 min, and no chemical reductant was needed in both the deposition and reduction processes. The carbon-oxygen ratio increased from 1.77 to 3.72 after the hot press reduction. The as-prepared flexible conductive cotton fabric showed a sheet resistance as low as 0.9 kΩ/sq. The sheet resistance of the conductive cotton fabric only increased from ∼0.9 kΩ/sq to ∼1.2 kΩ/sq after 10 washing cycles, exhibiting good washability. The conductive cotton fabric showed viability as a strain sensor even after 400 bending cycles, in which the stable change in the electrical resistance went from ∼3500 kΩ under tensile strain to ∼10 kΩ under compressive strain. This cost-effective and environmentally-friendly method can be easily extended to scalable production of reduced GO based flexible conductive cotton fabrics.
The authors are grateful for the financial support of the National Natural Science Foundation of China (21174055) and Research Innovation Program for College Graduates of Jiangsu Province (SJZZ15_0147). TC and FT acknowledge funding from the European Commission through the Graphene Flagship and the ERC grant Hetero2D.
External DOI: https://doi.org/10.1016/j.carbon.2016.10.045
This record's URL: https://www.repository.cam.ac.uk/handle/1810/261869