Peng Fangfang, Ke Yangchuan, Zhao Yi, Hu Xu, Zhao Xi
College of Science, China University of Petroleum Beijing 102249 China
RSC Adv. 2019 Apr 30;9(24):13378-13385. doi: 10.1039/c8ra10595b.
The properties of O/W emulsions can be improved by the addition of nanomaterials. To explore the influence of organically intercalated montmorillonites (OMts) on the properties of O/W emulsions, we introduced an OMt into a nanoemulsion as a co-stabilizer with the quaternary ammonium Gemini cationic surfactant (G16-2-16) and nonionic lauryl polyoxyethylene ether (Brij 30). The influence of the organically intercalated montmorillonite (OMt) on the properties, such as the interfacial tension, zeta potential, stability, conductivity and morphology of the droplets, of the nanoemulsions was investigated. The results indicate obvious synergistic effects of OMt with G16-2-16. At the concentration of 0.15% w/v G16-2-16, ultralow interfacial tension (IFT) of the O/W results in the formation of nanoemulsions in a much shorter time with 3.4 × 10% w/v OMt than that in the case of without OMt; however, at the concentration of 0.2% w/v G16-2-16, the interfacial tension of the O/W increased upon the addition of 3.4 × 10% w/v OMt. In addition, light transmission measurements showed that the transmission of the nanoemulsions varied with temperature, and the process was reversible. The mechanisms of these phenomena were analyzed and confirmed by TEM.
通过添加纳米材料可以改善水包油（O/W）乳液的性能。为了探究有机插层蒙脱石（OMt）对O/W乳液性能的影响，我们将一种OMt引入纳米乳液中，使其与季铵盐双子阳离子表面活性剂（G16-2-16）和非离子型月桂醇聚氧乙烯醚（Brij 30）作为共稳定剂。研究了有机插层蒙脱石（OMt）对纳米乳液性能的影响，如界面张力、zeta电位、稳定性、电导率和液滴形态。结果表明OMt与G16-2-16之间存在明显的协同效应。在G16-2-16浓度为0.15% w/v时，与不添加OMt的情况相比，添加3.4×10% w/v OMt时，O/W的超低界面张力（IFT）能在更短时间内形成纳米乳液；然而，在G16-2-16浓度为0.2% w/v时，添加3.4×10% w/v OMt后O/W的界面张力增加。此外，透光率测量表明纳米乳液的透光率随温度变化，且该过程是可逆的。通过透射电子显微镜（TEM）对这些现象的机制进行了分析和证实。
