Fracture Behavior of Two Highly Stretchable Double Network Hydrogels |
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| Authors: | Xue-Feng Li Chu Wu Cheng Jiang Qian-Wen Chen Dan Zou |
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| Affiliation: | 1. School of Materials Science &2. Engineering, Hubei University of Technology , Wuhan , China;3. Hubei Provincial Key Laboratory of Green Materials for Light Industry , Wuhan , China li_xf@mail.hbut.edu.cn;5. Hubei Provincial Key Laboratory of Green Materials for Light Industry , Wuhan , China |
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| Abstract: | The static and dynamic mechanical behavior of two double network (DN) hydrogels, alginate/polyacrylamide (PAAm) hybrid hydrogel and sodium poly(2-acrylamido-2-methylpropanesulfonic acid) PNaAMPS/PAAm, is presented to understand the role played by different cross-linked networks on fracture and recovery properties. Although with a smaller modulus, alginate/PAAm hybrid hydrogel had a much higher stretchability, whether with or without notches, in the tensile tests. Continuous step strain measurement by using a strain-controlled parallel-plate rheometer showed that alginate/PAAm can immediately recover its mechanical properties after breakdown, while PNaAMPS/PAAm didn't show mechanical recovery at all. |
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| Keywords: | Double network Fracture Hydrogel Recovery |
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