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在PIM-1膜中创建自我半透网络结构,以增强物理衰老抵抗力

Andrew Seeger¹, Ruilan Guo¹

¹Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States.

ACS applied materials & interfaces

|October 27, 2025

概括

从PIM-1聚合物中开发自我半透网络 (ssIPN) 薄膜可以提高气体分离性能. 与线性PIM-1相比,这些ssIPN薄膜显示出更好的物理抗衰老能力,保持透性和选择性.

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
化学工程是化学工程的重要组成部分.

背景情况:

微孔聚合物膜对于气体分离至关重要.
内在微孔性聚合物 (PIMs),如PIM-1,具有高透性,但遭受物理衰老.
制定减轻身体衰老的策略对于实际应用至关重要.

研究的目的:

创建和描述基于PIM-1.1的自我半透网络 (ssIPN) 薄膜.
为了研究这些ssIPN薄膜的微观结构和气体透特性.
为了评估ssIPN薄膜用于气体分离的物理老化阻力.

主要方法:

带有可治愈末端组的远程PIM-1寡合体的合成.
通过交叉链接的寡合物和相互透的线性PIM-1链形成ssIPN膜.
使用气体透度测量和广角X射线散射 (WAXS) 的表征.
对H2/CH4和O2/N2分离的两个月的物理衰老的评估.

主要成果:

根据上限的权衡线,ssIPN薄膜保持了接近线性PIM-1的气体分离性能.
增加的网络内容导致了更紧密的链包装,正如WAXS数据所示.
与线性PIM-1相比,所有ssIPN膜都表现出优越的物理抗衰老能力.
具有10%重量%网络含量的PIM-1 ssIPN表现出最好的耐老化性能,具有最小的透性损失.

结论:

半相互透的网络提供了一种可行的策略,以提高PIM-1膜的物理抗衰老能力.
ssIPN的形成保持了气体分离效率,同时显著提高了长期稳定性.
这种宏分子方法有望开发强大的微孔聚合物膜,用于工业气体分离.

关键词:

在PIM-1中,PIM-1是PIM-1.最终的交叉链接身体的衰老身体的衰老半相互透的网络网络.电切力寡合体是什么意思

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