Experimental Verification of the Balance between Elastic Pressure and Ionic Osmotic Pressure of Highly Swollen Charged Gels
| Autor: | Jian Ping Gong, Honglei Guo, Takayuki Kurokawa, Tasuku Nakajima, Ken Ichi Hoshino |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Ionic bonding Thermodynamics Donnan potential Bioengineering tetra-PEG gel 02 engineering and technology molecular stent method 010402 general chemistry Osmosis 01 natural sciences Article lcsh:Chemistry Biomaterials symbols.namesake swelling lcsh:General. Including alchemy lcsh:Inorganic chemistry medicine Osmotic pressure Elasticity (economics) lcsh:Science Organic Chemistry Charge density 021001 nanoscience & nanotechnology lcsh:QD146-197 0104 chemical sciences lcsh:QD1-999 osmotic pressure symbols lcsh:Q elasticity Electric potential Swelling medicine.symptom 0210 nano-technology lcsh:QD1-65 |
| Zdroj: | Gels Volume 7 Issue 2 Gels, Vol 7, Iss 39, p 39 (2021) |
| ISSN: | 2310-2861 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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