分子动力学模拟超临界二氧化碳与辅助溶剂辅助的涂层树脂之间的兼容性
Nan Wang1, Chenxiao Pei1, Yuhang Zhong1
1Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Institute of Environmental Science, Fudan University, Shanghai 200433, China.
Materials (Basel, Switzerland)
|January 8, 2025
概括
超临界二氧化碳 (ScCO2) 可以溶解聚乙烯化物 (PVDF) 用于环保涂料. 最佳条件和乙醇等辅溶剂提高了PVDF在ScCO2中的溶解度,减少了污染.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 涂料中的挥发性有机溶剂有助于空气污染.
- 超临界二氧化碳 (ScCO2) 提供了一个更绿色的替代方案.
- 聚乙烯化物 (PVDF) 是涂料中常见的聚合物.
研究的目的:
- 研究PVDF在ScCO2.2中的溶解行为.
- 评估温度,压力和辅溶剂对PVDF溶解度的影响.
- 了解控制PVDF-ScCO2兼容性的微观相互作用.
主要方法:
- 分子动力学模拟.分子动力学模拟.
- 分析可溶性参数,结合能量和辐射分布函数.
- 对相互作用的微观水平的研究.
主要成果:
- 低温和高压 (在308.15K,16MPa的最佳状态) 有利于PVDF在ScCO2.2中溶解.
- 可溶性增强剂对温度比压力更敏感.
- 弱的PVDF-ScCO2吸引力需要辅溶剂来改善混合.
- 像乙醇这样的极地辅溶剂通过结增强了可溶性.
结论:
- ScCO2显示了作为PVDF涂层的环保溶剂的潜力.
- 优化温度和压力对于有效的PVDF溶解至关重要.
- 辅溶剂,特别是形成键的辅溶剂,显著提高了PVDF与ScCO2的兼容性.
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