使用分子动力学模拟研究的多德干从具有可变表面化学的表面脱离,使用分子动力学模拟
Binbin Jiang1, Huan Hou2, Qian Liu2
1State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, China Energy Investment Group, Beijing 102211, China.
Molecules (Basel, Switzerland)
|June 28, 2023
概括
从二氧化表面脱落的油分离取决于醇组密度和类型. 分子动力学模拟显示,Q3表面通过水扩散和H结合更容易去除油. Q2和Q4表面由于西拉诺尔组相互作用而阻碍脱落.
科学领域:
- 表面科学是一门学科.
- 计算化学计算化学
- 材料科学 材料科学 材料科学
背景情况:
- 了解石油-水-固体相互作用对于各种工业过程至关重要.
- 表面化学,特别是醇组密度和类型,影响了界面行为.
- 之前的研究已经探索了表面特性,但需要对脱落机制进行详细的分子洞察.
研究的目的:
- 为了研究n-多德干在不同化学成分的二氧化表面上的吸附和分离.
- 阐明醇组密度 (Q2,Q3,Q4环境) 和类型在油分离中的作用.
- 了解控制油-水-接触线动态的分子机制.
主要方法:
- 用分子动力学模拟来建模n-多德干的吸附和分离.
- 在有控制的醇组密度 (0~9.4 nm−2) 的氧表面上进行了模拟.
- 分析的重点是接触线的动态,水的扩散和结合相互作用.
主要成果:
- 在完美的Q3表面 (Si(OH) 群体上,由于水-醇H键的形成,油分离显著更容易,更快.
- 增加的Q2二氧化表面 (Si(OH) 2组) 减少了由于西拉诺-西拉诺H结合而导致的油分离.
- 在Q4表面上没有发生油分离 (没有醇组),因为水不能在接触线上扩散.
结论:
- 从二氧化中脱离油的效率取决于醇组的面积密度和类型.
- 表面化学,受裂面平面和湿度等因素的影响,决定了脱离行为.
- 分子动力学为表面特性和界面过程的复杂相互作用提供了宝贵的见解.
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