| 초록 |
A hydrogel is a hydrophilic polymer having a three-dimensional network and containing a large amount of water therein. Such hydrogels have properties such as biocompatibility, irritation reactivity, impact absorbability, high water content, and low frictional force that are different from metals, ceramics and plastics. However, conventional hydrogels have limitation for their application because they possess weak and brittle mechanical properties due to intrinsic structure inhomogeneity. Recently, some physical hydrogels with robust self-healing through dynamic ionic bonding have been developed. Polyampholyte (PA) hydrogels were prepared by radical polymerization of opposite ionic monomers. In order to solve the problem of deformation of PA hydrogel due to evaporation of water, the solvent was replaced by a hydrophilic solvent. The mechanical behavior of PA hydrogel was studied according to the exchange ratio of the solution. |
