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Abstract:
As an excellent model material for fundamental studies on temperature-sensitive hydrogels, poly(N-isopropylacrylamide) (NIPA) hydrogel has been applied in drug delivery, tissue engineering, and soft robotics. However, the lack of study on fracture and fatigue hinders further development of hydrogels for applications where cyclic loading-unloading is unavoidable. In this study, the fracture and fatigue damage of the NIPA hydrogel were studied for the first time by pure shear tests at different temperatures. Fracture behaviors were investigated under monotonic load from 31 °C to 39 °C. It is found that the fracture energy increases with the increase in temperature. The fracture energy is approximately 20 J m−2 near the volume phase transition temperature. Temperature also significantly influences the fatigue life. By fitting the experimental data, the fatigue limit λf is determined. The results obtained from the experimental tests would be important for the engineering applications of the NIPA hydrogels. © The Royal Society of Chemistry.
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RSC Advances
Year: 2018
Issue: 54
Volume: 8
Page: 31048-31054
3 . 0 4 9
JCR@2018
3 . 3 6 1
JCR@2020
ESI Discipline: CHEMISTRY;
ESI HC Threshold:135
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count: 10
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 6
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