Copolyimide mixed matrix membranes with oriented microporous titanosilicate JDF-L1 sheet particles

Abstract

JDF-L1 is a microporous titanosilicate exhibiting a layer structure with pore sizes of about 3 Å. It is consequently an attractive material to separate H 2-containing mixtures. This is the reason why JDF-L1, after disaggregation by means of hexadecyltrimethylammonium surfactant, has been combined with a carboxyl group containing copolyimide (6FDA-4MPD/6FDA-DABA 4:1) to produce mixed matrix membranes, which were applied to the separation of H 2 /CH 4 and O 2 /N 2 mixtures. Additionally, due to the sheet growth habit of JDF-L1 crystals, a preferential horizontal orientation of the JDF-L1 filler particles dispersed into the polymer was expected. This preferential orientation, which was achieved when the polymer solution concentration used during the membrane casting process was relatively low, has been studied by optical and electronic microscopy, X-ray diffraction and polarized Raman spectroscopy.

Current Status and Future Prospect of Polymer‐Layered Silicate Mixed‐Matrix Membranes for CO2/CH4 Separation

“…Besides clay minerals, AMH‐3 and MCM‐22, several other synthetically modified layered silicates have been used, such as UZAR‐S1, NU‐6, and ITQ‐2 62–64.…”

Polymeric mixed matrix membranes containing zeolites as a filler for gas separation applications: A review

“…Metal organic frameworks (MOF) [20][21][22][23][24][25][26][27][28], zeolitic imidazolate frameworks (ZIFs) [29][30][31][32][33], activated carbon [15,34], carbon nano tubes [35][36][37][38][39], titanosilicates [40,41], and ordered mesoporous silica [11,[42][43][44][45][46][47] are other types of porous materials that have been applied as the dispersed phase in mixed matrix membrane fabrication. Silica [42,[48][49][50][51][52][53], TiO 2 [42,[54][55][56][57], and fullerene (C60) [58] are the most conventional impermeable inorganic particles used for the MMMs fabrication.…”

Investigation of Cross-Linked and Additive Containing Polymer Materials for Membranes with Improved Performance in Pervaporation and Gas Separation

“…The aforementioned materials in lamellar form have been used as inorganic fillers in mixed-matrix membranes [87,88]. Such sheet-shaped or lamellar fillers have a high aspect ratio, which allows casting of thin mixed-matrix membranes.…”