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Issue
Korean Journal of Chemical Engineering,
Vol.34, No.2, 470-475, 2017
Synthesis and characterization of polypyrrole doped by cage silsesquioxane with carboxyl groups
Shi G, Che Y, Wu L, Rong Y, Ni C
Cage silsesquioxane with carboxyl groups (POSS-COOH) was successfully synthesized, after which it was added to polypyrrole (PPy) as a dopant to produce the doped PPy (PPy/POSS-COOH) solution. The PPy/POSSCOOH composites were characterized by FTIR (Fourier transformation infrared spectroscopy), SEM (Scanning electron microscopy), TGA (Thermo-gravimetric analysis), CV (Cyclic voltammetry) and RL (Reflection loss). Compared to PPy without POSS-COOH (un-PPy), the conductivity of PPy/POSS-COOH composites could be improved dramatically, reaching up to 0.850 S/cm at 25 °C. Under N2 atmosphere, the residual rate of PPy/POSS-COOH was 68% at 700 °C, 14% higher than the one of un-PPy. Meanwhile, PPy/POSS-COOH had a reflection loss below - 8 dB over 9.35 to 11.20GHz, with a minimum value of - 10.32 dB at 10.54 GHz, thus demonstrating higher microwave absorption than un-PPy. This method may provide a facile route to produce doped conducting polymers with POSS-COOH.
Keywords: Cage Silsesquioxane; Polypyrrole; Thermal Stability; Electrochemical Activity; Microwave-absorbing Ability
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