Organogel formation rationalized by Hansen solubility parameters: influence of gelator structure

Julien Bonnet (1) , Gad Suissa (1) , Matthieu Raynal (1) , Laurent Bouteiller (1)

1 IPCM - Institut Parisien de Chimie Moléculaire

Some organic compounds form gels in liquids by forming a network of anisotropic fibres. Based on extensive solubility tests of four gelators of similar structures, and on Hansen solubility parameter formalism, we have probed the quantitative effect of a structural variation of the gelator structure on its gel formation ability. Increasing the length of an alkyl group of the gelator obviously reduces its polarity, which leads to a gradual shift of its solubility sphere towards lower δp and δh values. At the same time, its gelation sphere is shifted – to a much stronger extent – towards larger δp and δh values.

Mots clés: organogel; solubility; Hansen

Domaines: Chimie

Julien Bonnet, Gad Suissa, Matthieu Raynal, Laurent Bouteiller. Organogel formation rationalized by Hansen solubility parameters: influence of gelator structure. Soft Matter, 2015, 11 (11), pp.2308 - 2308. ⟨10.1039/c5sm00017c⟩. ⟨hal-01671934⟩