Preparation and swelling characteristics of hydrogel from microbial poly(γ-glutamic acid) by γ-irradiation
| Autor: | Min Ho Yoon, Jong-Soo Park, Seong Hyun Choi, Kyung Sook Whang, Woo-Young Choi |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering Sodium Organic Chemistry technology industry and agriculture chemistry.chemical_element Calcium engineering.material complex mixtures Compressive strength chemistry Ionic strength Self-healing hydrogels Polymer chemistry Materials Chemistry medicine engineering Biopolymer Swelling medicine.symptom Water content Nuclear chemistry |
| Zdroj: | Macromolecular Research. 13:339-343 |
| ISSN: | 2092-7673 1598-5032 |
| Popis: | Microbial hydrogel was prepared by γ-irradiation of poly(γ-glutamic acid) (PGA) which was produced fromBacillus subtilis BS 62 and it’s physico-chemical characteristic was examined. The hydrogel, prepared from 10% PGA with the dose of 48 kGy, was swollen up to 1,370 times of specific water content as dry weight basis. The hydrogels obtained above the dose of 48 kGy appeared to have higher compressive strength but lower specific water content. The period to reach a swelling equilibrium for the hydrogel in deionized water at the temperature range of 4 to 45 °C was about 10 h. The swollen hydrogel was shrunk in ionic solutions with the increase of ionic strength, and the rate of shrinkage was greater in calcium chloride solution than in sodium chloride. Specific water content of the hydrogel was quickly decreased at 80 °C, showing a thermally hydrodegradable property. |
| Databáze: | OpenAIRE |
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