National Institute of French Agricultural and Environmental Research, INRAE, Nantes 44300, France.
Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
J Colloid Interface Sci. 2021 Oct 15;600:882-886. doi: 10.1016/j.jcis.2021.05.076. Epub 2021 May 18.
Aqueous foams are encountered in many commercial products used in our everyday lives and are widely studied. However, the formation and stabilization of foams using high alcohol content (>75%) solvents such as ethanol is still a scientific challenge. Herein, we report for the first-time foams based on high ethanol content showing long-term stability by using natural fatty acid crystals. The platelet-shape crystals are adsorbed at the air-water surface protecting the bubbles against coalescence. The melting of crystals triggers the foam destabilization leading to thermostimulable high ethanol content foams. These foams can be used as a new formulation strategy for alcohol-based hand sanitizers to better clean hands, protect the skin by the presence of fatty acids, and limit the transmission of virus and other pathogens.
水基泡沫在我们日常生活中使用的许多商业产品中都有遇到，并且得到了广泛的研究。然而，使用高酒精含量（>75%）溶剂（如乙醇）形成和稳定泡沫仍然是一个科学挑战。在此，我们首次报道了使用天然脂肪酸晶体形成基于高乙醇含量的泡沫，这些泡沫具有长期稳定性。板状晶体吸附在气-水表面，防止气泡聚结。晶体的熔化触发泡沫失稳，导致热刺激高乙醇含量泡沫。这些泡沫可用作基于酒精的洗手液的新配方策略，以更好地清洁双手，通过脂肪酸的存在保护皮肤，并限制病毒和其他病原体的传播。
