分子动力学研究绿色溶剂聚乙烯糖醇与水杂质的研究
Markus M Hoffmann1, Matthew D Too1, Nathaniel A Paddock1
1Department of Chemistry and Biochemistry, State University of New York Brockport, Brockport, NY 14420, USA.
Molecules (Basel, Switzerland)
|May 11, 2024
概括
分子动力学模拟表明,聚乙烯糖醇 (PEG) 中少量的水不会显著改变其特性. 水中的杂质形成有限的键,证实了PEG.
科学领域:
- 绿色化学和溶剂科学 绿色化学和溶剂科学
- 计算化学和分子建模
背景情况:
- 聚乙烯甘醇 (PEG) 是绿色化学的环保无害溶剂.
- PEG很容易吸收大气中的水分,引入水中的杂质.
研究的目的:
- 用分子动力学 (MD) 模拟来研究水杂质对PEG特性的影响.
- 为了评估水对PEG200的影响,二,四和六乙烯糖醇高达0.020重量分数.
主要方法:
- 使用各种水 (SPC/E,TIP4P/2005) 和PEG (OPLS-AA,修改后的OPLS-AA) 力场进行了MD模拟.
- 模拟分析了水聚合,键和物理属性对水含量的依赖性.
主要成果:
- 水不聚合,最多形成二次体,对模拟结果的影响最小.
- 添加的水减少了寡合体的键,但被分子内键部分补偿.
- 模拟的物理属性趋势显示浅极端,与实验单调的依赖关系形成鲜明对比.
结论:
- 模拟MD证实,PEG的物理性质在很大程度上对典型的大气水杂质不敏感.
- 观察到的趋势规模很小,与对PEG强度的实验发现一致.
关键词:
它们的密度是密度密度.乙烯基醇的寡聚物乙烯基醇.通过联结,形成联结.聚乙烯糖醇是一种聚乙烯糖醇.辐射分布函数的辐射分布函数自己扩散的自我扩散.粘度 粘度 粘度 粘度 粘度水中的污染物是水中的污染物.更多相关视频
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