pH-Responsive Liquid Marbles Based on Dihydroxystearic Acid

Abstract

Herein, we report pH-responsive liquid marbles stabilized by 9,10-dihydroxystearic acid (DHSA). The particle morphology and the pH-responsive behavior of the liquid marbles were investigated. The rolling time during the preparation of liquid marbles has a great influence on the thickness of powder adsorption and the stability of the marbles. Compared with the liquid marbles stabilized by other fatty acids (e.g., stearic acid and docosoic acid), the liquid marbles prepared by DHSA have a much higher mechanical robustness. The increase in the number of hydroxyl groups on the carbon chain of fatty acids improves the mechanical robustness of the liquid marbles. Such liquid marbles immediately disintegrated on the surface of an alkaline solution or after exposure to NH 3 gas, which extends their applications in the NH 3 sensor and chemical reactions.

Liquid marble – a high-yield micro-photobioreactor platform

“…29,30 The diversity in the choice of coating particles provides attractive properties such as robustness, transparency, or stimuli-responsiveness. 31,32 The liquid marble shell is porous and facilitates gas exchange, thus providing a conducive environment for microalgal culture. This study investigates the use of transparent liquid marbles coated with fumed silica nanoparticles.…”