粒子表面电荷和形状对形微粒溶液的风质和微观结构的影响
Meghana Mekala1, Jan Vermant2, Madivala G Basavaraj1
1Polymer Engineering and Colloid Science (PECS) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India.
Langmuir : the ACS journal of surfaces and colloids
|February 18, 2025
概括
充电的纳米粒子显著改变了类似虫的状溶液. 带正电荷的粒子增强粘度和放松性,而带负电荷的粒子降低了它们,影响了材料的性能.
科学领域:
- 合体和表面科学科学
- 材料科学 材料科学 材料科学
- 类风病学 类风病学 类风病学
背景情况:
- 从CTAB (乙三甲化物) 等表面活性剂形成的类似虫的状溶液 (WLM) 具有独特的粘弹性特性.
- 这些溶液的微观结构和质对外部因素敏感,包括纳米颗粒的添加.
研究的目的:
- 研究纳米颗粒的尺寸,形状和表面电荷如何影响基于CTAB的WLM解决方案的风学和微观结构.
- 了解WLM系统中带电纳米粒子和表面活性剂分子之间的相互作用机制.
主要方法:
- 在具有不同纳米粒子特性的WLM溶液上进行了风湿学测量 (粘度,放松时间).
- 使用动态光散射 (DLS) 和小角度X射线散射 (SAXS) 来探测微观结构和粒子-表面活性物相互作用.
- 血纳米球被用来研究WLM溶液从类似液体的转变为类似凝的行为.
主要成果:
- 负电荷的纳米粒子降低了WLM溶液的粘弹性特性 (零剪切粘度,放松时间).
- 带正电荷的纳米粒子增加了零剪切粘度,放松时间和细胞纠.
- 高度的血酸盐纳米球诱导了从粘弹性流体过渡到类似凝的行为.
结论:
- 纳米颗粒的表面电荷,形状和化学成分决定了它们对WLM溶液形学和微观结构的影响.
- 纳米粒子-WLM相互作用可以调整以修改溶液特性,为先进的材料设计提供潜力.
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