Gas separation in polyimide membranes with molecular sieve-like chemical/physical dual crosslink elements onto the top of surface
Gas separation in polyimide membranes with molecular sieve-like chemical/physical dual crosslink elements onto the top of surface
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DOI：
10.1016/j.memsci.2017.12.064
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发表时间：
2018-03
影响因子：
9.5
通讯作者：
Ryosui Iwasa;Takahiro Suizu;Haruka Yamaji;T. Yoshioka;K. Nagai
中科院分区：
文献类型：
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作者：
Ryosui Iwasa;Takahiro Suizu;Haruka Yamaji;T. Yoshioka;K. Nagai
研究了真空紫外辐照聚酰亚胺膜和表面交联聚酰亚胺膜的气体分离性能。衰减全反射傅里叶变换红外（ATR-FTIR）光谱和X-射线光电子能谱（XPS）测量的膜表明，在真空紫外照射后的羟基基团的数量增加，并从羟基形成氢键。随着气体分子尺寸的增加，表面改性聚酰亚胺膜的气体渗透性降低。经真空紫外光辐照和3-氨丙基三乙氧基硅烷（APTES）处理的聚酰亚胺膜对H2/CO2、H2/N2和H2/CH 4的选择透过率分别从0.74提高到17、13提高到230和14提高到600。因此，我们成功地建立了一个网络结构，利用真空紫外线照射形成的羟基和改善聚酰亚胺膜的氢分离性能。
The gas separation properties of vacuum ultra violet (VUV) irradiated polyimide membranes and surface-crosslinking polyimide membranes after VUV irradiation were investigated. The attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and the X-ray photoelectron spectroscopy (XPS) measurements of the membrane showed the increase in the number of hydroxyl groups after VUV irradiation and the formation of hydrogen bonds from the hydroxyl groups. The gas permeability of the surface-modified polyimide membrane decreased with increasing gas molecular size. Moreover, the permselectivity to H2/CO2, H2/N2, and H2/CH4of the polyimide membranes irradiated with VUV and treated with 3-aminopropyltriethoxysilane (APTES) increased from 0.74 to 17, 13 to 230, and 14 to 600, respectively. Therefore, we successfully established a network structure by using hydroxyl groups formed by VUV irradiation and improved the hydrogen separation performance of the polyimide membranes.