Using a Solvent-Induced Self-Assembly Approach to Fabricate and Tune the Organogels and Hydrogels

Author:

Wang Ruicong1,Hao Xiaoting1,Yang Haikuan2

Affiliation:

1. Upgrading Office of Modern College of Humanities and Sciences of Shanxi Normal University

2. North University of China

Abstract

Abstract In the present work, stable organogels and hydrogels could be formed by dimeric-dehydrocholic acid derivative (DDAD) in different solvents. Compared with the organogels, the hydrogels formed by DDAD were found to be thermal reversible and had higher gel-to-solution transition temperature. The supramolecular structures in the organogels and hydrogels were further studied by using transmission electron microscopy (TEM) and atomic force microscopy (AFM). TEM and AFM images of the supramolecular gels showed that the solvent effects played a crucial role in morphological structures. Specifically, the organogel had a three-dimensional porous network structure. While, the hydrogel had a supramolecular structure made up of long fibers. Fourier transformation infrared spectroscopy (FT-IR) showed that multiple hydrogen bonds among the gelator molecules were the main driving forces in gel formation. On this base, the solvent effects on the gelation abilities and thermal stability were discussed. Thus, the present study provides a solvent-induced self-assembly approach and contributes substantially to the development of the supramolecular gels as soft materials.

Publisher

Research Square Platform LLC

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