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RISS 인기검색어
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- 저자 : Hamidreza Sanaeepur (검색결과 2 건)
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Hamidreza Sanaeepur,Samaneh Mashhadikhan,Ghassem Mardassi,Abtin Ebadi Amooghin,Bart Van der Bruggen,Abdolreza Moghadassi 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.8
Commercial poly (ether-block-amide) (Pebax®) copolymers are thermoplastic elastomers that have attracted attention as membrane materials due to their high performance in CO2 separation. In this study, a cross-linking reaction is reported as a viable strategy to improve the gas separation performance of a highly permeable but low selective Pebax 2533 membrane. To this end, a new bi-functional aminosilane cross-linker (3-aminopropyl(diethoxy)methylsilane (APDEMS)) was applied. Cross-linked Pebax 2533 membranes were prepared via solution-casting with different amounts of APDEMS ranging from 0.5 to 4 wt%, to investigate the effect of the aminosilane concentration on the membrane performance. Gas separation with prepared membranes was studied for CO2/N2 at the feed pressure ranges of 2-10 bar. Instrumental analyses were applied to investigate the effect of the cross-linking reaction on the structure and properties of the membranes. The results showed that a 2 wt% APDEMS cross-linked Pebax 2533 membrane has the best gas separation performance. The CO2/N2 ideal selectivity of the cross-linked Pebax 2533 increased twice compared to the neat Pebax 2533 membrane at the feed pressure of 2 bar, while the CO2 permeability experienced a slight decrease by cross-linking, but still remains higher than the permeability of other Pebax grades.
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Samaneh Mashhadikhan,Abtin Ebadi Amooghin,Abdolreza Moghadassi,Hamidreza Sanaeepur 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.93 No.-
Modifying the polymer-filler interface is an efficient strategy to enhance the gas separation performanceof zeolite-filled mixed matrix membranes (MMMs) by overcoming the interfacial defects. In this study,zeolite 13X particles were modified with 3-aminopropyl(diethoxy)methylsilane (APDEMS) andsubsequently embedded into the synthesized 6FDA-Durene polyimide (PI) to prepare MMMs. Thecharacteristic properties of modified zeolite particles and fabricated MMMs were investigated via FTIR,XRD, BET, DLS and SEM analyses. Moreover, the separation performance of resultant membranes wasstudied for CO2/N2 separation consideringfiller content (0–20 wt.%) at different feed pressure in therange of 0.2 to 1 MPa. The best separation performance was obtained by embedding 15 wt.% ofaminosilanized zeolite 13X (ASZX) into the PI membrane that exhibits the excellent CO2 permeability of887 Barrer and CO2/N2 selectivity of 25.3 at the feed pressure of 0.2 MPa. These values increased by about95% and 81%, respectively compared to those for pure PI membrane. In addition, the thermomechanicalproperties of MMMs were improved after aminosilane modification of zeolite particles. Surfacemodification of the zeolite particles via the aminosilane coupling agents can be considered as a suitablestrategy to improvefiller/polymer interfacial adhesion which consequently increases the CO2 adsorptionthrough the CO2-amine interactions.
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