Abstract
AbstractSupramolecular hydrogels can spontaneously undergo syneresis through fibre–fibre interactions and expel significant amounts of water upon aging. In this process, the hydrophobicity of fibres which regulates the 3D‐rearrangement of the self‐assembled structures during syneresis is important. Here, we show that we can control the hydrophobic microenvironment of gels by incorporating organic salts into the co‐assembled gel fibres thereby enabling control of the macroscopic gel volume phase transition.
Highlights
Supramolecular hydrogels can spontaneously undergo syneresis through fibre–fibre interactions and expel significant amounts of water upon aging
Adams School of Chemistry, University of Glasgow, Glasgow, G12 8QQ (UK) E-mail: dave.adams@glasgow.ac.uk biosensing, microfluidic devices, and water purification.[7,9]. Such gels are stable under normal conditions and only undergo syneresis when exposed to specific stimuli
For a series of Fmoc-dipeptides, while hydrophobic dipeptides form stable, self-supporting materials, gels formed by less hydrophobic compounds tend to exhibit syneresis.[11]
Summary
Supramolecular hydrogels can spontaneously undergo syneresis through fibre–fibre interactions and expel significant amounts of water upon aging. The previously reported gelator (1, Figure 1) forms gels at low pH that undergo syneresis.[13] Initially, a solution of 1 was prepared by dissolving the compound in water in the presence of NaOH (2 molar equivalents).
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