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Properties and Potential Applications of Carboxymethyl-kappa-carrageenan Hydrogels Crosslinked by Gamma Radiation
https://repo.qst.go.jp/records/80417
https://repo.qst.go.jp/records/804179e53bb41-3a54-4496-970d-120a0233556e
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-09-07 | |||||
| タイトル | ||||||
| タイトル | Properties and Potential Applications of Carboxymethyl-kappa-carrageenan Hydrogels Crosslinked by Gamma Radiation | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
T. Aranilla, Charito
× T. Aranilla, Charito× Jeremiah D. Barba, Bin× S. Relleve, Lorna× Nagasawa, Naotsugu× Nagasawa, Naotsugu |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Carboxymethyl derivatives of k-carrageenan(CMkC), with different degrees of substitution, were gamma-irradiated in viscous or paste solutions. Successfully obtained chemically crosslinked hydrogels showed dependence on the degree of substitution(DS), concentration, and radiation dose. The highest gel fraction was 76% exhibited by CMkC-3s hydrogel with a DS of 1.58. The hydrogels showed different swelling degrees in water and saline. Swelling behavior versus time, in both solvents, corresponded to 2nd order kinetics. The CMkC-3s at 20% concentration irradiated at 15 kGy had the highest water absorption of 324 g water/g dry gel. Selected hydrogels were evaluated for applications as wound dressing, as water retainer in sandy soil, and as metal adsorbent. As a wound dressing, CMkC-2s and CMkC-3s hydrogels exhibited considerable tensile strengths, abilities to absorb pseudo extracellular fluid and extractables with pH/conductivity conducive for healing promotion. In addition, the CMkC-3s hydrogel had no cytotoxic potential based on the MTT test. As water retainer in sandy soil, test samples with 0.1, 0.3 and 0.5% CMkC-3s granules retained 25.1%, 32.2%, and 42.6% water, respectively, at day 0 compared to 19.2% of the sandy soil alone. On day 7, the three sandy soil-CMkC groups still had 13.7%, 19.4%, and 29.3% water while the control had only 3.85%. In the batch adsorption studies, the hydrogels adsorbed heavy metals (Cu2+, Zn2+, Cd2+ and Pb2+) in the solution at different capacities, with Cd2+ as the highly adsorbed and Pb2+ as the least. The CMkC-3s hydrogel showed the highest metal uptake and adsorption efficiency, followed by CMkC-2s, then CMkC-1s. The CMkC-3s hydrogel, further tested on pH effect, had optimum metal uptake at neutral pH. | |||||
| 書誌情報 |
The Philippine Journal of Science 巻 150, 号 1, p. 85-97, 発行日 2020-10 |
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| 出版者 | ||||||
| 出版者 | National Institute of Science and Technology | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0031-7683 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://philjournalsci.dost.gov.ph/102-vol-150-no-1-february-2021/1277 | |||||
