离子对水性表面活性剂溶液中同时存在的伪相的影响:冷TEM,类风湿测量和量化
Sapir Lifshiz-Simon1, Werner Kunz2, Thomas Zemb3
1Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute (RBNI), Technion - Israel Institute of Technology, Haifa 3200003, Israel.
Journal of colloid and interface science
|January 19, 2024
概括
特定的酸盐通过改变菌体结构来影响表面活性剂的包装和粘度. 这项研究使用冷TEM可视化这些变化,证实了伪相分布的模型及其对粘度的影响.
科学领域:
- 表面活性剂科学 表面活性剂科学
- 物理化学 物理化学
- 材料科学是一种材料科学.
背景情况:
- 酸盐对酸硫酸盐的影响影响表面活性剂的包装,并导致共存的伪相.
- 这些伪相,包括和双层,表现出复杂的形态,如端盖和分支点.
- 一个模型提出,这些结构的相对丰富性决定了粘度,特别是对盐敏感的粘度峰值,但缺乏显微镜验证.
研究的目的:
- 通过显微镜验证一个模型,解释酸盐对表面活性剂伪相分布和粘度的影响.
- 研究特定离子效应,表面活性剂纳米结构和宏观粘度之间的关系.
- 使用低温传导电子显微镜 (cryo-TEM) 进行表面活性剂伪相的定量分析.
主要方法:
- 采用冷传导电子显微镜 (cryo-TEM) 来绘制硫酸 (SLES) /盐/水溶液中的各种形态.
- 研究了不同酸盐 (Li+,Na+,K+,Cs+) 作为添加盐的作用.
- 与冷-TEM成像并行测量宏观溶液粘度.
主要成果:
- 化TEM揭示了多种类型的伪相,包括带有端盖的圆柱状菌根,盘,带有分支点的线程状菌根和双层.
- 观察到的形态学的相对比例在数量上接近了它们的化学潜力,与Benedek扩展的"梯子模型"保持一致.
- 该模型成功地解释和量化了不同阳离子的"盐曲线"中的粘度峰值,在微观水平上实验证实了该模型.
结论:
- 证实了先前提出的模型,将伪相分布与使用cryo-TEM的粘度联系起来.
- 证明了冷-TEM成像和美苏镜建模可以量化解释宏观性质,如粘度和特定离子效应.
- 展示了通过变化的离子预测和识别新型伪相 (盘,囊) 的能力,为盐敏感粘度现象提供了微观洞察力.
关键词:
无离子表面活性剂是一种非离子表面活性剂.这些反离子是反离子.脂质体是一种脂质体.微粒菌 (Micelles) 是一种微粒菌.类风病学 类风病学 类风病学这就是所谓的SLES.结冷-TEM可以使用.更多相关视频
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