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CO2-Switchable Pickering Emulsion Using Functionalized Silica Nanoparticles Decorated by Amine Oxide-Based Surfactants
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2018-01-11 00:00:00 , DOI: 10.1021/acssuschemeng.7b04162 Yongmin Zhang 1 , Xiaofei Ren 1 , Shuang Guo 1 , Xuefeng Liu 1 , Yun Fang 1
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2018-01-11 00:00:00 , DOI: 10.1021/acssuschemeng.7b04162 Yongmin Zhang 1 , Xiaofei Ren 1 , Shuang Guo 1 , Xuefeng Liu 1 , Yun Fang 1
Affiliation
Herein, we describe a novel CO2-switchable oil-in-water Pickering emulsion stabilized by functionalized silica nanoparticles with a trace amount of myristylamidopropyl amine oxide (C14PAO), which is commercially available, and readily biodegradable. C14PAO in the current system has been demonstrated to be CO2-responsive. Upon alternately bubbling CO2 and N2 under mild conditions (30 °C, 40 mL min–1), C14PAO is reversibly switched between cationic and nonionic forms, and is thereby adsorbed on or desorbed from the surface of the particles. In this way, interfacially active particles are formed and adsorbed on the surface of oil droplets, stabilizing the emulsion (CO2), or disrupted and desorbed from the surface of oil droplets, breaking the emulsion (N2). As compared to the traditional acid/base cycle, switching the current system with CO2/N2 multiple times does not lead to any evident changes in either macroscopic appearance or microscopic size. Moreover, this CO2-responsive Pickering emulsifier can be recycled when fresh oil was added after removing the original oil, and theoretically the cycling can be maintained, conforming to the principle of green and energy-saving processing. It offers a green, efficient, and recyclable container for oil product transportation, especially in high temperature area. Such a strategy is also suitable for other amine oxide-based surfactants, and does not require complicated organic synthesis.
中文翻译:
使用基于胺氧化物的表面活性剂修饰的功能化二氧化硅纳米粒子,用于CO 2可转换的Pickering乳液
在本文中,我们描述了一种新型的CO 2可转换的水包油Pickering乳液,该乳液由功能化的二氧化硅纳米颗粒与痕量的肉豆蔻酰氨基丙基丙基氧化胺(C 14 PAO)稳定化,可商购并易于生物降解。当前系统中的C 14 PAO已被证明对CO 2敏感。在温和条件下(30°C,40 mL min –1)交替鼓泡CO 2和N 2时,C 14PAO可逆地在阳离子和非离子形式之间转换,从而被吸附在颗粒表面或从颗粒表面解吸。以这种方式,形成界面活性颗粒并吸附在油滴的表面上,稳定了乳液(CO 2),或从油滴的表面破坏并解吸,破坏了乳液(N 2)。与传统的酸/碱循环相比,用CO 2 / N 2多次切换当前系统不会导致宏观外观或微观尺寸的任何明显变化。此外,该CO 2响应性Pickering乳化剂可以在去除原始油脂后添加新鲜油脂后进行回收利用,并且在理论上可以保持循环,符合绿色节能工艺的原理。它提供了绿色,高效且可回收的容器,用于石油产品运输,特别是在高温地区。这种策略也适用于其他基于氧化胺的表面活性剂,并且不需要复杂的有机合成。
更新日期:2018-01-11
中文翻译:
使用基于胺氧化物的表面活性剂修饰的功能化二氧化硅纳米粒子,用于CO 2可转换的Pickering乳液
在本文中,我们描述了一种新型的CO 2可转换的水包油Pickering乳液,该乳液由功能化的二氧化硅纳米颗粒与痕量的肉豆蔻酰氨基丙基丙基氧化胺(C 14 PAO)稳定化,可商购并易于生物降解。当前系统中的C 14 PAO已被证明对CO 2敏感。在温和条件下(30°C,40 mL min –1)交替鼓泡CO 2和N 2时,C 14PAO可逆地在阳离子和非离子形式之间转换,从而被吸附在颗粒表面或从颗粒表面解吸。以这种方式,形成界面活性颗粒并吸附在油滴的表面上,稳定了乳液(CO 2),或从油滴的表面破坏并解吸,破坏了乳液(N 2)。与传统的酸/碱循环相比,用CO 2 / N 2多次切换当前系统不会导致宏观外观或微观尺寸的任何明显变化。此外,该CO 2响应性Pickering乳化剂可以在去除原始油脂后添加新鲜油脂后进行回收利用,并且在理论上可以保持循环,符合绿色节能工艺的原理。它提供了绿色,高效且可回收的容器,用于石油产品运输,特别是在高温地区。这种策略也适用于其他基于氧化胺的表面活性剂,并且不需要复杂的有机合成。