用于 CO₂/N₂ 分离的超薄复合聚合物膜，具有最小厚度和高 CO₂ 渗透率。
Ultrathin Composite Polymeric Membranes for CO /N Separation with Minimum Thickness and High CO Permeance.
作者信息
Benito Javier, Sánchez-Laínez Javier, Zornoza Beatriz, Martín Santiago, Carta Mariolino, Malpass-Evans Richard, Téllez Carlos, McKeown Neil B, Coronas Joaquín, Gascón Ignacio
机构信息
Instituto de Nanociencia de Aragón (INA), Departamento de Química Física, Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain.
Instituto de Nanociencia de Aragón (INA), Departamento de Ingeniería, Química y Tecnologías del Medio Ambiente, Universidad de Zaragoza, C/ Mariano Esquillor, s/n., 50018, Zaragoza, Spain.
出版信息
ChemSusChem. 2017 Oct 23;10(20):4014-4017. doi: 10.1002/cssc.201701139. Epub 2017 Oct 4.
The use of ultrathin films as selective layers in composite membranes offers significant advantages in gas separation for increasing productivity while reducing the membrane size and energy costs. In this contribution, composite membranes have been obtained by the successive deposition of approximately 1 nm thick monolayers of a polymer of intrinsic microporosity (PIM) on top of dense membranes of the ultra-permeable poly[1-(trimethylsilyl)-1-propyne] (PTMSP). The ultrathin PIM films (30 nm in thickness) demonstrate CO permeance up to seven times higher than dense PIM membranes using only 0.04 % of the mass of PIM without a significant decrease in CO /N selectivity.
在复合膜中使用超薄膜作为选择性层，在气体分离方面具有显著优势，可提高生产率，同时减小膜尺寸并降低能源成本。在本研究中，通过在超渗透聚1-(三甲基硅基)-1-丙炔致密膜顶部依次沉积约1 nm厚的固有微孔聚合物(PIM)单分子层，制备了复合膜。厚度为30 nm的超薄PIM膜表现出的CO渗透通量比致密PIM膜高7倍，而PIM的用量仅为0.04 %，且CO /N选择性没有显著降低。
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