Preparation and swelling characteristics of hydrogel from microbial poly(γ-glutamic acid) by γ-irradiation

Comparison of the Stability of Poly-��-Glutamate Hydrogels Prepared by UV and ��-Ray Irradiation

“…Each buffer was chosen to mimic physiological conditions (pH, salt concentration, and salt composition). The γ-ray-irradiated hydrogel swelled in a way that was consistent with previous reporting [15,16] and completely dissolved within one to two weeks, but the UV-irradiated hydrogel remained in the solutions (except for 1× PBS and 0.9% NaCl) for more than nine weeks. As a result, the UV-irradiated hydrogel showed a stable state in the solutions, especially in KPB (Fig.…”

“…γ-PGAs can be linked to each other through a cross-link between a α-amino group and an γ-carboxyl group to form a hydrogel. Numerous studies on γ-PGA hydrogels have already been conducted [8,15,16]. However, these previously developed γ-PGA hydrogels exhibited unstable form [15,16] in solutions.…”

Preparation and Swelling Characteristics of Hydrogel from Microbial Low Molecular Weight Poly(γ-Glutamic Acid)

“…However, the specific water content was increased with the increase of temperature from 70 to 90 ℃. This may be due to the destory of some crosslink inside the PGA hydrogel and the strength was became low with the increase of temperature and the hydrogel was unstable high than 80 ℃ [4]. Fig.…”

Hydrophilic Finishing of Polyester Fiber with Finishing Agents Based on Poly(γ-glutamic acid)

“…It is water-soluble, biodegradable, edible and nontoxic towards human [22]. Therefore, γ-PGA and its derivatives have been broadly used in many industrial fields such as medicine, cosmetic and agriculture [23].They offer a wide range of applications including being used as highly water absorbable hydrogels [24,25].…”