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溶剂对聚甲基烯胺气凝的性能和结构的影响

Zhaohui Bai¹, Liang Xu¹, Yupei Zhao¹

¹Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu Province 213164, China.

Langmuir : the ACS journal of surfaces and colloids

|October 24, 2024

概括

溶剂的选择极大地影响了聚合甲利胺 (PMI) 的气凝特性. 使用二甲基硫氧化物 (DMSO) 导致收缩率最低,压力强度最高,突出其对材料性能的重要性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
纳米技术纳米技术

背景情况:

溶剂效应在溶液聚合过程中至关重要,影响单体-溶剂相互作用和聚合物结构.
自由基聚合特别敏感于溶剂选择,影响材料性能.
聚合甲利胺 (PMI) 气凝是具有可调节性质的先进材料.

研究的目的:

研究不同溶剂对PMI气凝的合成和性能的影响.
分析溶剂-单体相互作用如何影响气凝微结构和机械性能.
为了确定生产高性能PMI气凝的最佳溶剂.

主要方法:

通过冷干燥使用二甲基形式胺 (DMF),二甲基胺 (DMAc) 和二甲基硫氧化物 (DMSO) 合成PMI气凝.
气凝性质的表征,包括收缩,散装密度,孔隙大小和压力强度.
对单体反应率,单体分布和溶剂-单体相互作用的分析.

主要成果:

溶剂的选择显著影响了聚合过程和气凝的特性.
在最极性溶剂二甲基硫氧化物 (DMSO) 中合成的气凝显示出最小的收缩率 (33.98%).
从DMSO衍生出的气凝具有最高的密度 (0.1582g·cm−3) 和压力 (1695.48kPa在70%应变下).

结论:

溶剂选择是控制PMI气凝微结构的一个关键参数.
硫酸二甲基 (DMSO) 是一种有效的溶剂,用于生产具有增强机械性能的PMI气凝.
这项研究提供了通过战略性溶剂选择来定制气凝性能的见解.

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