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Royal Society of Chemistry, Soft Matter, 32(11), p. 6386-6392

DOI: 10.1039/c5sm01305d

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Heat-set gels formed from easily accessible gelators of a succinamic acid derivative (SAD) and a primary alkyl amine (R-NH2)

Journal article published in 2015 by Di-Chang Zhong ORCID, Lie-Qiang Liao, Ke-Jun Wang, Hui-Jin Liu, Xu-Zhong Luo
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Currently, design and construction of an intelligent stimuli-responsive gel system is still a significant challenge. We present here a new gel system from which the formation of heat-set gel, conventional gel and irreversible heat-set gel can be achieved in aromatic solvents. This gel system is based on two-component gelators containing a succinamic acid derivative (SAD) and a primary alkyl amine (R-NH2). Increase of temperature to 85 oC, a rarely reported reversible heat-set gel (gel formation with the increase of temperature) is afforded. Addition of fatty acid to the two-component gelators, a conventional gel (gel formation with the decrease of temperature) is formed. When the fatty acid is replaced with dicarboxylic acid, a new heat-set gel is generated, which is irreversible and thermally super-stable. X-ray diffraction analysis reveals that the formation of reversible heat-set gel relies on electrostatic interactions, hydrogen bonds, and hydrophobic interactions. This two-component gelators shows a perfect gel system for formation of diverse gels including heat-set gel, conventional gel and irreversible heat-set gel. The tunable strategy demonstrated in this letter may provide a new way for creation of more functional gels in gel science.