期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 114, 期 4, 页码 1541-1547出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp906312f
关键词
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资金
- Ministry of Education, Science, Sports and Culture. Japan [18068004]
- NEDO [05A257 10a]
- Grants-in-Aid for Scientific Research [18068004] Funding Source: KAKEN
Dynamic light scattering and oscillatory rheology experiments were performed to study the effects of various salts on the hydrogel consisting of an oligomeric electrolyte gelator, poly(pyridinium-1,4-diyliminocarbonyl-1,4-phenylenemethylene chloride) (1-Cl). Sol-gel transition temperature increased with increasing salt concentration that Suggested the salt-in behavior. The concentration dependence of the dynamic shear moduli showed power-law scaling behavior and was compared with the predictions made by the fractal gel model. The brittleness was increased by increasing salt concentration, indicating that 1-Cl hydrogel became better packed into stronger networks in ionic solutions. After certain salt concentrations, 1-Cl hydrogel started precipitation that might be due to the excessive network formation resulting in collapse of the network structure. The recovery of the mechanical properties of 1-Cl hydrogel was completely reduced in the presence of salts.
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