具有自我组装和热力学特征的表面活性离子液体的微粒形态之间的相关性:粗粒度的MD模拟和实验
Hajar Fallah-Totkar1, Ahmad Bagheri1, Mina Maddah2
1Department of Chemistry, Semnan University, P.O. Box 35131-19111, Semnan, Iran. abagheri@semnan.ac.ir.
Physical chemistry chemical physics : PCCP
|August 22, 2023
概括
用模拟和导电性测量研究了表面活性离子液体 (SAIL) 的自组装. 微粒形状受到基链长度和头组的影响,影响绿色溶剂应用的SAIL特性和稳定性.
科学领域:
- 物理化学 物理化学
- 材料科学 是一种材料科学.
- 计算化学是一种计算化学.
背景情况:
- 表面活性离子液体 (SAIL) 是有前途的绿色溶剂,具有低挥发性和高稳定性等理想性质.
- 了解SAIL的自组装行为对于优化其在工业应用中的性能至关重要.
研究的目的:
- 为了研究小形态和SAILs的物理化学/热力学特性之间的相关性.
- 为了阐明度,基链长度和头组性质对SAIL自组装的影响.
- 量化SAIL单体离合物从小粒体中解离所需的能量.
主要方法:
- 粗粒度分子动力学 (CGMD) 模拟与实验导电性测量相结合.
- 从导电性数据中确定临界微粒度 (CMC), counterion 分离,以及微粒化的吉布斯能量.
- 模拟MD计算微粒形态 (聚合数,半径,惯性瞬间) 和抽样潜力平均力 (PMF) 计算.
主要成果:
- 基链长度的增加导致了更大,非球形的粒.
- 基于的表面活性剂形成较大,更球形的粒,与基于伊米达的表面活性剂相比.
- 来自微粒的SAIL单体的解离能量随着尾巴长度的增加而增加,而非球形微粒的解离能量则更高.
结论:
- 帆菌体形态显著影响物理化学性质和稳定性.
- 尾巴长度和头组类型是控制小形状和属性的关键因素.
- 这项研究提供了通过控制它们的自我组装和细胞行为来为各种化学过程量身定制SAIL的见解.
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