Structural Tuning of Polymers of Intrinsic Microporosity via the Copolymerization with Macrocyclic 4-tert-butylcalix[4]arene for Enhanced Gas Separation Performance

2018 ◽  
Vol 2 (10) ◽  
pp. 1800044 ◽  
Author(s):  
Ji Wu ◽  
Jiangtao Liu ◽  
Tai-Shung Chung
Keyword(s):  
Gas Separation ◽  
Separation Performance ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity ◽  
Gas Separation Performance

scholarly journals Boosting gas separation performance and suppressing the physical aging of polymers of intrinsic microporosity (PIM-1) by nanomaterial blending

Nanoscale ◽  
2020 ◽  
Vol 12 (46) ◽  
pp. 23333-23370 ◽  
Author(s):  
Mohd Zamidi Ahmad ◽  
Roberto Castro-Muñoz ◽  
Peter M. Budd
Keyword(s):  
Gas Separation ◽  
Physical Aging ◽  
Ideal Gas ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Hybrid Fillers ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity ◽  
Gas Separation Performance ◽  
The Ideal

The development of PIM-1 mixed matrix membranes using organic, inorganic and hybrid fillers towards the ideal gas separation enhancement.

scholarly journals Thermal Cross Linking of Novel Azide Modified Polymers of Intrinsic Microporosity—Effect of Distribution and the Gas Separation Performance

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1241 ◽  
Author(s):  
Silvio Neumann ◽  
Gisela Bengtson ◽  
David Meis ◽  
Volkan Filiz
Keyword(s):  
Gas Separation ◽  
Physical Aging ◽  
Gas Permeability ◽  
Time Lag ◽  
Polymer Chains ◽  
Separation Performance ◽  
Polymer Backbone ◽  
Cross Linkage ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

The synthesis of polymers of intrinsic microporosity (PIM) modified with azide groups, the cross linkage by nitrene reaction and their performance as gas separation membranes are reported. The azide modification of the spirobisindane units in the polymer backbone was done by post functionalization of methylated spirobisindane containing polymers. These polymers differ in distribution and concentration of the azide group containing spirobisindane units by applying perfectly alternating and randomly distributed copolymers along the polymer chains. To investigate the influence of concentration of the azide groups, additionally the homopolymer of methylated spirobisindane was synthesized and subjected to identical treatments and characterizations as both copolymers. Cross linkage by nitrene reaction was examined by different temperature treatments at 150, 200, 250 and 300 °C. Characterization of the new polymers was performed by NMR, SEC and FT-IR. Furthermore, the crosslinking process was investigated by means of solid state NMR, TGA-FTIR, DSC and isoconversional kinetic analysis performed with TGA. Gas permeability of CO2, N2, CH4, H2 and O2 was determined by time lag experiments and ideal selectivities for several gas pairs were calculated. The two azide groups per repeating unit degrade during thermal treatments by release of nitrogen and form mechanically stable PIM networks, leading to an increase in gas permeability while selectivity remained nearly constant. Measured diffusivity and solubility coefficients revealed differences in the formation of free volume elements depending on distribution and concentration of the azide groups. Aging studies over about five months were performed and physical aging rates (βP) were evaluated with regard to the concentration and distribution of curable azide functionalities. Subsequently, the enhanced sieving effect during aging resulted in membrane materials that surpassed the Robeson upper bound in selected gas pairs.

Polymers of intrinsic microporosity/metal–organic framework hybrid membranes with improved interfacial interaction for high-performance CO2 separation

2017 ◽  
Vol 5 (22) ◽  
pp. 10968-10977 ◽  
Author(s):  
Zhenggong Wang ◽  
Huiting Ren ◽  
Shenxiang Zhang ◽  
Feng Zhang ◽  
Jian Jin
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
Interfacial Interaction ◽  
Co2 Separation ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Metal Organic ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity ◽  
Gas Separation Performance

An interfacial design utilizing hydrogen bonds was proposed for fabricating non-defective PIMs/MOF hybrid membranes to enhance the gas separation performance.

scholarly journals The spirobichroman-based polyimides with different side groups: from structure–property relationships to chain packing and gas transport performance

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 5086-5095
Author(s):  
Shuli Wang ◽  
Xiaohua Tong ◽  
Chunbo Wang ◽  
Xiaocui Han ◽  
Sizhuo Jin ◽  
...  
Keyword(s):  
Dihedral Angle ◽  
Gas Separation ◽  
Gas Transport ◽  
Critical Role ◽  
Polymer Membranes ◽  
Separation Performance ◽  
Structure Property ◽  
Chain Packing ◽  
Structure Property Relationships ◽  
Gas Separation Performance

Effect of substituents on the dihedral angle and chain packing plays a critical role in the enhancement in the gas separation performance of polymer membranes.

scholarly journals Gas separation performance of copolymers of perfluoro(butenyl vinyl ether) and perfluoro(2,2-dimethyl-1,3-dioxole)

2021 ◽  
pp. 119401
Author(s):  
Moataz Ali El-Okazy ◽  
Liang Liu ◽  
Christopher P. Junk ◽  
Erich Kathmann ◽  
Whitney White ◽  
...  
Keyword(s):  
Vinyl Ether ◽  
Gas Separation ◽  
Separation Performance ◽  
Gas Separation Performance
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