The validity of the time-lag method for the characterization of mixed-matrix membranes

In the present work, ZIF-8/6FDA-durene mixed matrix membranes (MMMs) were synthesized and characterized. ZIF-8 nanocrystals, which were used as the inorganic filler, were synthesized using rapid room-temperature synthesis method whereas 6FDA-durene polyimide was synthesized by polycondensation method followed by chemical imidization. Pure and 6FDA-durene membranes loaded with 5 wt%, 10 wt% and 15 wt% of ZIF-8 were fabricated. The structural properties and morphology of the resultant membranes were characterized by using X-ray Diffraction (XRD) and Field emission scanning electron microscope (FESEM) . The EDX images showed that ZIF-8 particles agglomerated in the polymer matrix. However, no phase separation was observed for all resultant MMMs.

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Preparation and characterization of SAPO-34 – Matrimid® 5218 mixed matrix membranes for CO2/CH4 separation

Chemical Engineering Research and Design ◽

10.1016/j.cherd.2013.01.022 ◽

2013 ◽

Vol 91 (7) ◽

pp. 1335-1342 ◽

Cited By ~ 42

Author(s):

Mohammad Peydayesh ◽

Shirin Asarehpour ◽

Toraj Mohammadi ◽

Omid Bakhtiari

Keyword(s):

Mixed Matrix Membranes ◽

Mixed Matrix ◽

Matrix Membranes

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CO2 Selective, Zeolitic Imidazolate Framework-7 Based Polymer Composite Mixed-Matrix Membranes

Journal of Materials Science Research ◽

10.5539/jmsr.v7n3p1 ◽

2018 ◽

Vol 7 (3) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Tina Chakrabarty ◽

Pradeep Neelakanda ◽

Klaus-Viktor Peinemann

Keyword(s):

Metal Organic Framework ◽

Time Lag ◽

Morphological Characterization ◽

Mixed Matrix Membranes ◽

Co2 Removal ◽

Hybrid Membranes ◽

Mixed Matrix ◽

Zeolitic Imidazolate Framework ◽

Custom Made ◽

Matrix Membranes

CO2 removal is necessary to mitigate the effects of global warming but it is a challenging process to separate CO2 from natural gas, biogas, and other gas streams. Development of hybrid membranes by use of polymers and metal-organic framework (MOF) particles is a viable option to overcome this challenge. A ZIF-7 nano-filler that was synthesized in our lab was embedded into a designed polymer matrix at various loadings and the performance of the mixed matrix membranes was evaluated in terms of gas permeance and selectivity. Hybrid membranes with various loadings (20, 30 and 40 wt%) were developed and tested at room temperature by a custom made time lag equipment and a jump in selectivity was observed when compared with the pristine polymer. A commercially attractive region for the selectivity CO2 over CH4 was achieved with a selectivity of 39 for 40 wt% particle loading. An increase in selectivity was observed with the increase of ZIF-7 loadings. Best performance was seen at 40% ZIF-7 loaded membrane with an ideal selectivity of 39 for CO2 over CH4. The obtained selectivity was 105% higher for CO2 over CH4 than the selectivity of the pristine polymer with a slight decrease in permeance. Morphological characterization of such developed membranes showed an excellent compatibility between the polymer and particle adhesion.

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