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Experimental Verification of the Balance between Elastic Pressure and Ionic Osmotic Pressure of Highly Swollen Charged Gels
| Title: | Experimental Verification of the Balance between Elastic Pressure and Ionic Osmotic Pressure of Highly Swollen Charged Gels |
| Authors: | Nakajima, Tasuku Browse this author →KAKEN DB | | Hoshino, Ken-ichi Browse this author | | Guo, Honglei Browse this author | | Kurokawa, Takayuki Browse this author →KAKEN DB | | Gong, Jian Ping Browse this author →KAKEN DB |
| Keywords: | swelling | | elasticity | | osmotic pressure | | Donnan potential | | tetra-PEG gel | | molecular stent method |
| Issue Date: | 1-Apr-2021 |
| Publisher: | MDPI |
| Journal Title: | Gels |
| Volume: | 7 |
| Issue: | 2 |
| Start Page: | 39 |
| Publisher DOI: | 10.3390/gels7020039 |
| Abstract: | The equilibrium swelling degree of a highly swollen charged gel has been thought to be determined by the balance between its elastic pressure and ionic osmotic pressure. However, the full experimental verification of this balance has not previously been conducted. In this study, we verified the balance between the elastic pressure and ionic osmotic pressure of charged gels using purely experimental methods. We used tetra-PEG gels created using the molecular stent method (St-tetra-PEG gels) as the highly swollen charged gels to precisely and separately control their network structure and charge density. The elastic pressure of the gels was measured through the indentation test, whereas the ionic osmotic pressure was determined by electric potential measurement without any strong assumptions or fittings. We confirmed that the two experimentally determined pressures of the St-tetra-PEG gels were well balanced at their swelling equilibrium, suggesting the validity of the aforementioned relationship. Furthermore, from single-strand level analysis, we investigated the structural requirements of the highly swollen charged gels in which the elasticity and ionic osmosis are balanced at their swelling equilibrium. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/82332 |
| Appears in Collections: | 国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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