表面张力
氟碳化合物
润湿
吸附
临界胶束浓度
动态光散射
化学工程
水溶液
肺表面活性物质
吉布斯等温线
接触角
碳氢化合物
胶束
化学
阳离子聚合
溴化物
羧酸盐
材料科学
无机化学
有机化学
纳米颗粒
热力学
工程类
物理
作者
Guoyong Wang,Qiwen Yin,Jixian Shen,Yanyun Bai,Xiaoyuan Ma,Zhongjie Du,Wanxu Wang
标识
DOI:10.1016/j.molliq.2017.03.059
摘要
In mixtures of sodium perfluoropolyether carboxylate (PFPE-Na) and cetyltrimethylammonium bromide (CTAB) in dilute solutions, the surface activities and aggregation behaviors have been investigated by the surface tension, dynamic surface tension, contact angle methodologies, dynamic light scattering (DLS), transmission electron microscopy (TEM) and dye encapsulation experiments. The surface tension measurements provided the critical micelle concentration (CMC) and the surface tension at the CMC (γCMC) at different molar ratios. In addition, surface activity parameters of the maximum surface excess concentration (Γmax) and the minimum surface area/molecule (Amin) at the air/water interface were evaluated. The adsorption and wetting abilities of FC-poor mixed systems were studied. Mixed systems of fluorocarbon - hydrocarbon surfactants show better ability to reduce the surface tension and more efficiency to reduce the surface tension. Adding tiny amount of PFPE-Na to CTAB solution (1:20–1:50) has little effect to adsorption, but it enhances the surface activity and wetting ability of mixed system distinctly. Meanwhile, the mixed system can form stable vesicle spontaneously near the PFPE-Na/CTAB ratio of 2:1 in aqueous solution, it may be used as drug delivery vehicles and cold be used as micro/nanotemplates for material synthesis [1–4].
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