Gamma-polyglutamic acid (γ-PGA) hydrogel is a kind of material with three-dimensional network structure formed by the crosslinking of γ-polyglutamic acid. Because the molecule contains a large number of carboxyl groups, it has good absorptive capacity. Since γ-PGA is derived from microorganisms, its hydrogel is a biocompatible, environmentally friendly, and multi-functional material that can be applied to the biomedicine, daily chemical, environmental and textile fields. In this paper, three crosslinking methods for preparing γ-PGA hydrogels in recent years:physical crosslinking, chemical crosslinking and enzymatic crosslinking are reviewed. Then the application of γ-PGA hydrogels in tissue engineering, supercapacitor and textile is summarized, and the future prospective tendency is presented.
Contents
1 Introduction
2 Methods to prepare γ-polyglutamic acid hydrogel
2.1 Physical crosslinking
2.2 Chemical crosslinking
2.3 Enzymatic crosslinking
3 Application of γ-polyglutamic acid hydrogel
3.1 Tissue Engineering
3.2 Super capacitor
3.3 Textile
3.4 Others
4 Conclusion