Fabrication of Bacterial Cellulose-Based ATO-PPy Nanocomposites as Flexible Conductive Materials
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https://doi.org/10.1007/s11664-020-08434-x © 2020 The Minerals, Metals Materials Society
Fabrication of Bacterial Cellulose-Based ATO-PPy Nanocomposites as Flexible Conductive Materials JIANBIN YE,1 LINXUAN GUO,2 YINGJIE FENG,3 FUYAN SUN,1 TINGTING ZHANG,3 ZONGCAN YANG,3 GUOPENG SHEN,2 and ZHAN ZHANG3,4 1.—School of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People’s Republic of China. 2.—School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, People’s Republic of China. 3.—Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450001, People’s Republic of China. 4.—e-mail: [email protected]
An ideal flexible conductive material, bacterial cellulose-based antimony tin oxide-polypyrrole (BC-ATO-PPy), was fabricated in this study. The BC-ATO film was synthesized in situ along with the growth of the BC film, and then PPy was coated uniformly onto the as-prepared film. The structural characterization results showed that BC-ATO-PPy was successfully fabricated. The electrochemical properties of these as-synthesized composites (BC-ATO-PPy, BC-PPy, BC-ATO) were better than those of pure BC. A cyclic voltammetry (CV) test showed that the conductivities of BC-ATO, BC-PPy and BC-ATOPPy were increased to 10.236 S/cm, 11.636 S/cm and 16.532 S/cm, respectively. The electrochemical impedance spectra (EIS) test showed that the resistance values of BC-ATO, BC-PPy and BC-ATO-PPy decreased to 83.6 Ω, 63.2 Ω and 32.4 Ω, respectively. Additionally, the specific capacitance also increased from 7.47 F/g for BC to 681.3 F/g for BC-ATO-PPy, 563.9 F/g for BC-ATO and 302.2 F/g for BC-PPy. The bending test showed that BC-ATO-PPy has stable CV curves and conductivity, suggesting that it is an excellent flexible conductive material. These results suggested that these as-synthesized nanomaterials, especially BC-ATO-PPy, are ideal flexible conductive materials. Key words: Bacterial cellulose, flexible, antimony tin oxide (ATO), PPy, conductive
INTRODUCTION Flexible and stretchable conductive materials have attracted great attention due to their wide applications in optoelectronic devices.1,2 For example, lightweight flexible conductive materials have largely promoted the development of portable electronic devices, including wearable electronics, touch screens and liquid crystal displays.3,4 The growing demand for these products has resulted in the intense consumption of nonrenewable natural re-
(Received April 12, 2020; accepted August 20, 2020)
sources. Thus, great efforts should be made to develop renewable, biodegradable and environmentally friendly flexible conductive materials. Cellulose, a biodegradable polymer, has been widely used as a support to fabricate flexible conductive nanomaterials that have been applied onto flexible displays, flexible solar cells and portable supercapacitors.5,6 Compared to plant and animal cellulose, bacterial cellulose (BC) has gained considerable attention not only because of its excellent physicochemical pr
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