Journal
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
Volume 52, Issue 10, Pages 3061-3070Publisher
SCIENCE PRESS
DOI: 10.1007/s11431-009-0280-4
Keywords
EAP; IPMC; perfluorosulfonate acid; silica oxide; sol-gel reaction
Funding
- National Natural Key Science Foundation of China [60535020]
- National Natural Science Foundation of China [50705043, 50805076]
- Natural Science Foundation of Jiangsu Province [2007202]
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This paper reports a new technique to fabricate an ion-exchange polymer-metal composite (IPMC) actuator. This technique is based on a hybrid organic-inorganic composite membrane. In the fabrication course, silica oxide particles, prepared from hydrolysis of tetraethyl orthosilicate in situ with sol-gel reaction, co-crystallize with perfluorosulfonate acid (PFSA) ionomer. Attenuated total reflectance fourier transform infrared spectroscopy (ATR-FTIR) analyses demonstrate that a highly water-saving hybrid membrane is formed. Measurements of mechanical properties reveal that elastic modulus and hardness of the hybrid membrane are about 2 times compared to a commercial PFSA membrane. Scanning electron microscopy (SEM) results show that the hybrid membrane has a high porosity. Inside the membrane pores, there exists a great quantity of micro scale channels in the range of 100-300 nm. After fabrication of IPMC actuator, an electric current sensor, a force sensor, and a high speed camera are assembled and used to evaluate IPMC performance. It is shown that, compared to an IPMC actuator made from a commercial membrane, the electromechanical performance of the new actuator increases 6-8 times; when it is actuated in air, its stable non-water working time is prolonged for 6-7 times.
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