Jiang Jianzhong, Li Huaixin, Gu Yao
The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University 1800 Lihu Road Wuxi Jiangsu P.R. China
Chem Sci. 2023 Feb 27;14(12):3370-3376. doi: 10.1039/d3sc00228d. eCollection 2023 Mar 22.
CO-responsive emulsions have attracted considerable attention in recent years because of their biocompatibility and easy removal of CO. However, most CO-responsive emulsions are only used in stabilization and demulsification processes. In this paper, we report CO-switchable oil-in-dispersion (OID) emulsions co-stabilized with silica nanoparticles and anionic NCOONa, in which the required concentrations of NCOONa and silica particles were as low as 0.01 mM and 0.0001 wt%, respectively. Besides reversible emulsification/demulsification, the aqueous phase containing the emulsifiers was recycled and reused with the CO/N trigger. More importantly, the properties of the emulsions, such as droplet sizes (40-1020 μm) and viscosities (6-2190 Pa s), were intelligently controlled by the CO/N trigger, and meanwhile reversible conversion between OID emulsions and Pickering emulsions was achieved. The present method offers a green and sustainable way to regulate the emulsion states, which enables smart control of emulsions and widens their potential applications.
近年来，一氧化碳响应性乳液因其生物相容性和易于去除一氧化碳而备受关注。然而，大多数一氧化碳响应性乳液仅用于稳定和破乳过程。在本文中，我们报道了与二氧化硅纳米颗粒和阴离子型NCOONa共同稳定的一氧化碳可切换分散油（OID）乳液，其中NCOONa和二氧化硅颗粒的所需浓度分别低至0.01 mM和0.0001 wt%。除了可逆乳化/破乳外，含有乳化剂的水相通过CO/N触发器进行循环和再利用。更重要的是，乳液的性质，如液滴尺寸（40 - 1020 μm）和粘度（6 - 2190 Pa s），由CO/N触发器智能控制，同时实现了OID乳液和皮克林乳液之间的可逆转换。本方法提供了一种绿色可持续的方式来调节乳液状态，实现对乳液的智能控制并拓宽其潜在应用。
