Issue 54, 2018, Issue in Progress
From the journal:

RSC Advances

Effects of temperature on the fracture and fatigue damage of temperature sensitive hydrogels

Ni Zhang,a   Zhouzhou Pan,a   Jincheng Leia  and  Zishun Liu ORCID logo *a  

* Corresponding authors

a International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structure, Xi'an Jiaotong University, Xi'an 710049, China
E-mail: zishunliu@mail.xjtu.edu.cn

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.

Graphical abstract: Effects of temperature on the fracture and fatigue damage of temperature sensitive hydrogels

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Article information

DOI
https://doi.org/10.1039/C8RA06518G
Article type
Paper
Submitted
02 Aug 2018
Accepted
20 Aug 2018
First published
03 Sep 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 31048-31054

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Effects of temperature on the fracture and fatigue damage of temperature sensitive hydrogels

N. Zhang, Z. Pan, J. Lei and Z. Liu, RSC Adv., 2018, 8, 31048 DOI: 10.1039/C8RA06518G

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