Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 112, Issue 37, Pages 11537-11541Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp803774r
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Funding
- Ministry of Education, Science, Sports, and Culture, Japan [18068004]
- New Energy and Industrial Technology Development Organization [05A2571 Oa]
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The hydrogel consisting of an oligomeric electrolyte, poly[pyridinium-1,4-diyi-iminocarbonyl-1,4-phenylenemethylene chloride] (1-Cl) underwent self-healing at temperatures lower than its gelation temperature after destruction of the gel network in a shear flow. The self-healing mechanism was investigated by theological measurements on three different kinds of gels including a low-molecular weight organogelator and a polymeric hydrogelator. Although all of the three gels exhibited thermo-reversible hysteresis loops in the shear moduli, only 1-Cl hydrogel recovered its mechanical properties after vigorous agitation. It is conjectured that the self-healing is due to formation of network structure via a chlorine ion mediated hydrogen bond for which the activation energy is on the order of 10 kJ/mol.
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