Effect of Polyaniline/manganese Dioxide Composite on the Thermoelectric Effect of Cement-based Materials
Tao Ji , Xiao Liao , Yan He , Shiping Zhang , Xiaoying Zhang , Xiong Zhang , Weihua Li
Journal of Wuhan University of Technology Materials Science Edition ›› 2023, Vol. 38 ›› Issue (1) : 109 -116.
Effect of Polyaniline/manganese Dioxide Composite on the Thermoelectric Effect of Cement-based Materials
To enhance the thermoelectric effect of cement-based materials, conductive polyaniline (PANI) modified MnO2 powder was synthesized and used as a thermoelectric component in the cement composites. The nanostructured PANI was deposited on the surface of the nanorod-shaped α-MnO2 particle and the weight ratio of PANI to MnO2 was 22.3:77.7 in the composite. The synthesized PANI/MnO2 composite was nanostructured according to the SEM image. The test results of the thermoelectric properties proved that the PANI/MnO2 composite was effective as the Seebeck coefficient and electrical conductivity values of the cement composites with PANI/MnO2 inside were 3–4 orders of magnitude higher than those of pure cement paste and the thermal conductivity values of these cement samples were similar. The obtained maximum figure of merit (ZT) value (2.75×10−3) was much larger than that of conductive materials reinforced cement-based composites. The thermoelectric effect of cement composites is mainly enhanced by the increased Seebeck coefficient and electrical conductivity in this work.
PANI/MnO2 composite / cement composites / thermoelectric effect / Seebeck coefficient / electrical conductivity
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