TY - JOUR
T1 - Enhanced conductivity of polyaniline in the presence of nonionic amphiphilic polymers and their diverse morphologies
AU - Yang, Liuqing
AU - Wu, Wenling
AU - Ohki, Yoshimichi
AU - Feng, Yang
AU - Li, Shengtao
N1 - Funding Information:
This paper is dedicated to the memory of Prof. Yanfeng Li. The work is supported by the National Natural Science Foundation of China (51407140). The authors gratefully acknowledge financial support from the China Postdoctoral Science Foundation (2014M552448).
Publisher Copyright:
© 2017 Wiley Periodicals, Inc.
PY - 2017/12/15
Y1 - 2017/12/15
N2 - Poly(ethylene oxide) (PEO) and its copolymers have excellent affinity for protons and contribute to proton transfer. In the present study, PEO and its copolymers, poly[(ethylene oxide)20-(propylene oxide)70-(ethylene oxide)20] (EO20PO70EO20, P123) and poly[(ethylene oxide)106-(propylene oxide)70-(ethylene oxide)106] (EO106PO70EO106, F127), have been found to significantly enhance the conductivity of polyaniline (PANI). After introducing these polymers, the conductivity of PANI is markedly promoted more than two orders of magnitude compared to that of PANI without additives, from 5.2 to 667 S/m. The molecular weight of PEO affects the conductivity of PANI/PEO. The mechanism by which these amphiphilic polymers are beneficial to the conductivity of PANI is studied experimentally and theoretically. The PANI/P123 prepared in the presence of PEO block copolymer shows gradually varying morphologies containing leaflike sheets, rodlike particles, and uniform chestnutlike sphere particles. This is similar to the morphology change of micelles with surfactant concentration. PEO, P123, and F127 are further found to have a positive effect on PANI as a material for sensors or supercapacitors, since high specific capacity and fast response rate are desired qualities in sensors and supercapacitors.
AB - Poly(ethylene oxide) (PEO) and its copolymers have excellent affinity for protons and contribute to proton transfer. In the present study, PEO and its copolymers, poly[(ethylene oxide)20-(propylene oxide)70-(ethylene oxide)20] (EO20PO70EO20, P123) and poly[(ethylene oxide)106-(propylene oxide)70-(ethylene oxide)106] (EO106PO70EO106, F127), have been found to significantly enhance the conductivity of polyaniline (PANI). After introducing these polymers, the conductivity of PANI is markedly promoted more than two orders of magnitude compared to that of PANI without additives, from 5.2 to 667 S/m. The molecular weight of PEO affects the conductivity of PANI/PEO. The mechanism by which these amphiphilic polymers are beneficial to the conductivity of PANI is studied experimentally and theoretically. The PANI/P123 prepared in the presence of PEO block copolymer shows gradually varying morphologies containing leaflike sheets, rodlike particles, and uniform chestnutlike sphere particles. This is similar to the morphology change of micelles with surfactant concentration. PEO, P123, and F127 are further found to have a positive effect on PANI as a material for sensors or supercapacitors, since high specific capacity and fast response rate are desired qualities in sensors and supercapacitors.
KW - batteries and fuel cells
KW - conducting polymers
KW - electrochemistry
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U2 - 10.1002/app.45547
DO - 10.1002/app.45547
M3 - Article
AN - SCOPUS:85028925681
SN - 0021-8995
VL - 134
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 47
M1 - 45547
ER -