Widely adaptable oil-in-water gel emulsions stabilized by an amphiphilic hydrogelator derived from dehydroabietic acid

Yan, Tingting; Song, Binglei; Pei, Xiaomei; Cui, Zhenggang; Binks, Bernard P.; Yang, Hengquan

doi:10.1002/anie.201907774

Authors

Tingting Yan

Binglei Song

Xiaomei Pei

Zhenggang Cui

Professor Bernard P Binks B.P.Binks@hull.ac.uk
Professor of Physical Chemistry

Hengquan Yang

Abstract

A surfactant, R-6-AO, derived from dehydroabietic acid has been synthesized. It behaves as a highly efficient low-molecular-weight hydrogelator with an extremely low critical gelation concentration (CGC) of 0.18 wt % (4 mm). R-6-AO not only stabilizes oil-in-water (O/W) emulsions at concentrations above its critical micelle concentration (cmc) of 0.6 mm, but also forms gel emulsions at concentrations beyond the CGC with the oil volume fraction freely adjustable between 2 % and 95 %. Cryo-TEM images reveal that R-6-AO molecules self-assemble into left-handed helical fibers with cross-sectional diameters of about 10 nm in pure water, which can be turned to very stable hydrogels at concentrations above the CGC. The gel emulsions stabilized by R-6-AO can be prepared with different oils (n-dodecane, n-decane, n-octane, soybean oil, olive oil, tricaprylin) owing to the tricyclic diterpene hydrophobic structure in their molecules that enables them to adopt a unique arrangement in the fibers.

Citation

Yan, T., Song, B., Pei, X., Cui, Z., Binks, B. P., & Yang, H. (2020). Widely adaptable oil-in-water gel emulsions stabilized by an amphiphilic hydrogelator derived from dehydroabietic acid. Angewandte Chemie, 59(2), 637-641. https://doi.org/10.1002/anie.201907774

Journal Article Type	Article
Acceptance Date	Oct 26, 2019
Online Publication Date	Oct 31, 2019
Publication Date	Jan 7, 2020
Deposit Date	Nov 4, 2019
Publicly Available Date	Nov 1, 2020
Journal	Angewandte Chemie - International Edition
Print ISSN	1433-7851
Electronic ISSN	1521-3773
Publisher	Wiley
Peer Reviewed	Peer Reviewed
Volume	59
Issue	2
Pages	637-641
DOI	https://doi.org/10.1002/anie.201907774
Keywords	Gel emulsions; Low molecular weight hydrogelator; Self-assemble fibers; Dehydroabietic acid; Amine oxide
Public URL	https://hull-repository.worktribe.com/output/3082925