期刊
POLYMER
卷 50, 期 22, 页码 5236-5241出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2009.09.025
关键词
Hydrogels; Conducting polymers; Mechanical strength
资金
- National Natural Science Foundation of China [20574034, 50773030]
- Program of Higher Education of China [200802840010]
- Scientific Research Foundation of Graduate School of Nanjing University
- Testing Foundation of Nanjing University
Mechanically strong triple-network (TN) hydrogels composed of poly(acrylic acid) (PAA) and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) have been fabricated with conductive PEDOT-PSS hydrogel acting as the third network. As-prepared PAA/PEDOT-PSS TN hydrogels display a compressive fracture stress as high as 1.8 MPa and still keep the electrical functionality of the conducting component. The success of PEDOT-PSS hydrogel in strengthening the materials is ascribed to the entangled microstructure of the triple networks and the variable molecular structure of the conducting polymer. A preliminary strengthening mechanism is proposed based upon the experimental results and the DN and/or TN theories. In addition, the applicability of the TN hydrogels in electrosensors; and supercapacitors is briefly discussed. The present findings have successfully demonstrated the functionalization of mechanically strong hydrogels, and are of crucial significance in the development of DN and TN hydrogels both academically and practically. (C) 2009 Elsevier Ltd. All rights reserved.
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