Controlling the network type in self-assembled dipeptide hydrogels

Colquhoun, Catherine, Draper, Emily R, Schweins, Ralf, Marcello, Marco, Vadukul, Devkee, Serpell, Louise C and Adams, Dave J (2017) Controlling the network type in self-assembled dipeptide hydrogels. Soft Matter, 13 (9). pp. 1914-1919. ISSN 1744-683X

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We show that the same low molecular weight gelator can form gels using three different methods. Gels were formed from a high pH solution either by adding a salt or by adding an acid; gels were also formed by adding water to a solution of the gelator in an organic solvent. The mechanical properties for the gels formed by the different methods are different from one another. We link this to the network type that is formed, as well as the fibrous structures that are formed. The salt-triggered gels show a significant number of fibres that tend to align. The acid-triggered gels contain many thin fibres, which form an entangled network. The solvent-triggered gels show the presence of spherulitic domains. We show that it is tractable to vary the trigger mechanism for an established, robust gelator to prepare gels with targeted properties as opposed to synthesising new gelators.

Item Type: Article
Schools and Departments: School of Life Sciences > Biochemistry
Research Centres and Groups: Dementia Research Group
Depositing User: Louise Serpell
Date Deposited: 04 Apr 2017 10:28
Last Modified: 08 Sep 2017 09:22

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