Membranes with both good permeation and selectivity are highly desired for gas separations. In this study, we synthesized a new 6FDA-type polyimide copolymer 6FDA-BDTA-ODA, and then an organic polymer of poly (N-vinylimidazole) was doped into the polyimide to prepare mixed matrix membranes (MMMs). We also studied the effect of poly (N-vinylimidazole) contents on the separation performance of MMMs. The results showed that the ideal selectivity for CO2/CH4 was improved by adding the poly (N-vinylimidazole) filler. The ideal selectivity reached 63.5 with 6 wt% poly (N-vinylimidazole) loading with the permeability of 29.2 Barrer. The highly permeable MMMs showed a considerably enhanced performance for CO2/CH4 that close to the 2008 Robeson upper-bound. The gas separation performance of the prepared MMMs for CO2/CH4 was improved compared to that of the pure polymer membrane, indicating that the copolyimide/poly (N-vinylimidazole) MMMs have promising applications in CO2/CH4 gas separation.
SiagianUWRRaksajatiAHimmaNF, et al.Membrane-based carbon capture technologies: membrane gas separation vs. membrane contactor. J Nat Gas Sci Eng2019; 67: 172–195.
2.
ChenXLiuGJinW. Natural gas purification by asymmetric membranes: an overview. Green Energy Environ2021; 6: 176–192.
3.
BakerRWLowBT. Gas separation membrane materials: a perspective. Macromolecules2014; 47: 6999–7013.
4.
BernardoPDrioliEGolemmeG. Membrane gas separation: a review/state of the art. Ind Eng Chem Res2009; 48: 4638–4663.
5.
RangnekarNMittalNElyassiB, et al.Zeolite membranes-a review and comparison with MOFs. Chem Soc Rev2015; 44: 7128–7154.
6.
KorosWJMahajanR. Pushing the limits on possibilities for large scale gas separation: which strategies?J Membr Sci2000; 175: 181–196.
7.
KentishSE. Polymeric membranes for natural gas processing. Advanced membrane science and technology for sustainable energy and environmental applications. Cambridge: Elsevier, 2011, pp. 339–360.
8.
AdewoleJKSultanAS. Polymeric membranes for natural gas processing: polymer synthesis and membrane gas transport properties. In: Jafar MazumderMSheardownHAl-AhmedA (eds) Functional polymers. polymers and polymeric composites: a reference series. Cham: Springer, 2019.
9.
RobesonLM. The upper bound revisited. J Membr Sci2008; 320: 390–400.
10.
DongGLiHChenV. Challenges and opportunities for mixed-matrix membranes for gas separation. J Mater Chem A2013; 1: 4610–4630.
11.
DechnikJGasconJDoonanCJ, et al.Mixed‐matrix membranes. Angew Chem Int Ed2017; 56: 9292–9310.
12.
GuoXQiaoZLiuD, et al.Mixed-matrix membranes for CO2 separation: role of the third component. J Mater Chem A2019; 7: 24738–24759.
13.
MoghadamFOmidkhahMRVasheghani-FarahaniE, et al.The effect of TiO2 nanoparticles on gas transport properties of Matrimid5218-based mixed matrix membranes. Sep Purif Technol2011; 77: 128–136.
14.
AziziNMohammadiTBehbahaniRM. Synthesis of a PEBAX-1074/ZnO nanocomposite membrane with improved CO2 separation performance. J Energy Chem2017; 26: 454–465.
15.
AziziNMohammadiTMosayebi BehbahaniR. Comparison of permeability performance of PEBAX-1074/TiO2, PEBAX-1074/SiO2 and PEBAX-1074/Al2O3 nanocomposite membranes for CO2/CH4 separation. Chem Eng Res Des2017; 117: 177–189.
16.
MolkiBAframehrWMBagheriR, et al.Mixed matrix membranes of polyurethane with nickel oxide nanoparticles for CO2 gas separation. J Membr Sci2018; 549: 588–601.
17.
FakharAMaghamiSSametiE, et al.Gas separation through polyurethane–ZnO mixed matrix membranes and mathematical modeling of the interfacial morphology. SPE Polymers2020; 1: 113–124.
18.
ZhuWLiuFGouM, et al.Mixed matrix membrane containing metal oxide nanosheets for efficient CO2 separation. Green Chem Eng2021; 2: 132–143.
19.
DaiYRuanXYanZ, et al.Imidazole functionalized graphene oxide/PEBAX mixed matrix membranes for efficient CO2 capture. Sep Purif Technol2016; 166: 171–180.
20.
ZhuWQinYWangZ, et al.Incorporating the magnetic alignment of GO composites into pebax matrix for gas separation. J Energy Chem2019; 31: 1–10.
21.
Luque-AlledJMTamaddondarMFosterAB, et al.PIM-1/Holey graphene oxide mixed matrix membranes for gas separation: unveiling the role of holes. ACS Appl Mater Interfaces2021; 13: 55517–55533.
22.
LiXMaLZhangH, et al. Synergistic effect of combining carbon nanotubes and graphene oxide in mixed matrix membranes for efficient CO2 separation. J Membr Sci2015; 479: 1–10.
ZhangQLiSWangC, et al.Carbon nanotube-based mixed-matrix membranes with supramolecularly engineered interface for enhanced gas separation performance. J Membr Sci2020; 598: 117794.
25.
SeoaneBCoronasJGasconI, et al.Metal–organic framework based mixed matrix membranes: a solution for highly efficient CO2 capture?Chem Soc Rev2015; 44: 2421–2454.
26.
GuoXHuangHBanY, et al.Mixed matrix membranes incorporated with amine-functionalized titanium-based metal-organic framework for CO2/CH4 separation. J Membr Sci2015; 478: 130–139.
27.
HuaYWangHLiQ, et al.Highly efficient CH4 purification by LaBTB PCP-based mixed matrix membranes. J Mater Chem A2018; 6: 599–606.
28.
YuanSLiXZhuJ, et al.Covalent organic frameworks for membrane separation. Chem Soc Rev2019; 48: 2665–2681.
29.
WinartaJMeshramAZhuF, et al.Metal–organic framework‐based mixed‐matrix membranes for gas separation: an overview. J Poly Sci2020; 58: 2518–2546.
30.
FanYYuHXuS, et al.Zn(II)-modified imidazole containing polyimide/ZIF-8 mixed matrix membranes for gas separations. J Membr Sci2020; 597: 117775.
31.
JainAAhmadMZLinkèsA, et al.6FDA-DAM:DABA co-polyimide mixed matrix membranes with GO and ZIF-8 mixtures for effective CO2/CH4 separation. Nanomaterials2021; 11: 668.
32.
LeeCSKangMKimKC, et al.In-situ formation of asymmetric thin-film, mixed-matrix membranes with ZIF-8 in dual-functional imidazole-based comb copolymer for high-performance CO2 capture. J Membr Sci2022; 642: 119913.
33.
SongTDengJDengL, et al.Poly(Vinylimidazole-Co-Butyl Acrylate) membranes for CO2 separation. Polymer2019; 160: 223–230.
34.
O’HarraKEDeVrieseEMTurflingerEM, et al.Design and gas separation performance of imidazolium Poly(ILs) containing multivalent imidazolium fillers and crosslinking agents. Polymers2021; 13: 1388.
35.
ColemanMRKorosWJ. The transport properties of polyimide isomers containing hexafluoroisopropylidene in the diamine residue. J Polym Sci Part B Polym Phys1994; 32: 1915–1926.
36.
CaoC. The study of 6FDA-Polyimide gas separation membranes. PhD Thesis, National University of Singapore, Singapore, 2003.
37.
LiuZLiuYQiuW, et al.Molecularly engineered 6FDA‐based polyimide membranes for sour natural gas separation. Angew Chem Int Ed2020; 59: 14877–14883.
38.
KhalighNG. Poly(N-vinylimidazole) as a halogen-free and efficient catalyst for N-Boc protection of amines under solvent-free conditions. RSC Adv2012; 2: 12364–12370.
39.
FodorCBoziJBlazsóM, et al.Unexpected thermal decomposition behavior of Poly(N-Vinylimidazole)-l-Poly(Tetrahydrofuran) amphiphilic conetworks, a class of chemically forced blends. RSC Adv2015; 5: 17413–17423.
