PIM-1 mixed matrix membranes for gas separations using cost-effective hypercrosslinked nanoparticle fillers
PIM-1 mixed matrix membranes for gas separations using cost-effective hypercrosslinked nanoparticle fillers
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DOI：
10.1039/c6cc00261g
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发表时间：
2016-01-01
影响因子：
4.9
通讯作者：
Cooper, Andrew I.
中科院分区：
文献类型：
--
作者：
Mitra, Tamoghna;Bhavsar, Rupesh S.;Cooper, Andrew I.
高自由体积的玻璃态聚合物，如固有微孔聚合物（PIM）和聚（三甲基甲硅烷基丙炔），由于其高渗透性而作为膜材料引起了人们的注意。然而，自由体积随时间的损失或老化限制了它们的适用性。第二填料相的引入可以减少这种老化，但是成本或不稳定性排除了许多填料的放大。在这里，我们报告了一种廉价，耐酸，纳米颗粒超高交联聚合物“海绵”作为替代填料。在加入填料时，渗透性增强，并且强烈地延缓老化。这伴随着CO2/N-2选择性随时间增加，超过了Robeson上限。
High-free-volume glassy polymers, such as polymers of intrinsic microporosity (PIMs) and poly(trimethylsilylpropyne), have attracted attention as membrane materials due to their high permeability. However, loss of free volume over time, or aging, limits their applicability. Introduction of a secondary filler phase can reduce this aging but either cost or instability rules out scale up for many fillers. Here, we report a cheap, acid-tolerant, nanoparticulate hypercrosslinked polymer 'sponge' as an alternative filler. On adding the filler, permeability is enhanced and aging is strongly retarded. This is accompanied by a CO2/N-2 selectivity that increases over time, surpassing the Robeson upper bound.