Effect of different healing temperature on self-healing hydrogel

Abstract

In this study, hydrogels of poly(2-hydroxyethyl methacrylate) with different healing temperature were studied on healing efficacy of self-healing hydrogel. To identify the optimum healing temperature of healable hydrogel which give the highest healing efficacy, the sample were tested from 45 °C-65 °C for 5 hours. The gel being cut will merge together through intermolecular diffusion of dangling chain and/or chain slippage. The results showed that 60oC was the optimum healing temperature which provides the highest ultimate tensile strength of healing efficacy. The pictures of durability poly(HEMA) hydrogel were taken and supported the self-healing behavior of hydrogel.