Membrane color and gas permeability of 6FDA-TeMPD polyimide membranes prepared with various membrane preparation protocols

2011 ◽  
Vol 51 (12) ◽  
pp. 2360-2369 ◽  
Author(s):  
Shinji Kanehashi ◽  
Shuichi Sato ◽  
Kazukiyo Nagai
Keyword(s):  
Gas Permeability ◽  
Membrane Preparation ◽  
Polyimide Membranes

The effect of nanoparticles on gas permeability with polyimide membranes and network hybrid membranes: a review

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Chengyun Gao ◽  
Jiayou Liao ◽  
Jingqiong Lu ◽  
Jiwei Ma ◽  
Ehsan Kianfar
Keyword(s):  
Volume Fraction ◽  
Gas Permeability ◽  
Polymer Network ◽  
Molecular Size ◽  
Hybrid Membranes ◽  
High Permeability ◽  
Nanoparticle Distribution ◽  
Mixture Separation ◽  
Composite Lattice ◽  
Polyimide Membranes

AbstractPolyimide membranes and network hybrid membranes exhibit high permeability despite good thermal and chemical stability, and high selectivity in gas mixture separation. In this study, the effect of nanoparticle distribution on the network polymer network, and changes in permeability, selectivity, and structure of the composite lattice membrane are investigated. According to the obtained permeability results, this increase in permeability was due to the increase of polymer network free volume and the formation of cavities in the nanoparticle-polymer interface. The significant results were that the permeability growth of gases with larger molecular size such as methane and nitrogen was higher than other gases. A comparison of the permeability growth of gases with the increasing volume fraction of nanoparticles confirms the dominance of the molecular sieve mechanism and the type of membrane transport mechanism change over polyimide and network Hybrid.

Microstructural parameters controlling gas permeability and permselectivity in polyimide membranes

2010 ◽  
Vol 349 (1-2) ◽  
pp. 25-34 ◽  
Author(s):  
Corine Bas ◽  
Régis Mercier ◽  
Charles Dauwe ◽  
N. Dominique Albérola
Keyword(s):  
Gas Permeability ◽  
Microstructural Parameters ◽  
Polyimide Membranes

Physical aging of 6FDA-based polyimide membranes monitored by gas permeability

Polymer ◽  
2011 ◽  
Vol 52 (15) ◽  
pp. 3374-3380 ◽  
Author(s):  
Lili Cui ◽  
Wulin Qiu ◽  
D.R. Paul ◽  
W.J. Koros
Keyword(s):  
Physical Aging ◽  
Gas Permeability ◽  
Polyimide Membranes

Effects of 60Co-Irradiation on Gas Permeation Properties of Polyimide Membranes

2014 ◽  
Vol 912-914 ◽  
pp. 123-126
Author(s):  
Yu Hua Qiao ◽  
Huai Min Miao ◽  
Yong Biao Xu ◽  
Wei Jiang ◽  
Yan Hong Zheng ◽  
...  
Keyword(s):  
Gas Separation ◽  
Radiation Effects ◽  
Gas Permeability ◽  
Gas Permeation ◽  
Ideal Selectivity ◽  
Tetracarboxylic Dianhydride ◽  
Permeation Properties ◽  
The Ideal ◽  
Polyimide Membranes

Radiation effects on polyimide (PI) membranes were studied with different irradiation doses by60Co. The PI membrane were synthesized from 2,2-bis (3-amino-4-hydroxyphenyl) hexafluoropropane (Bis-AP-AF) with 3,3',4,4'-Benzophenone tetracarboxylic dianhydride (BTDA). The single gas permeability of He, H2, CO2, O2, N2and CH4were measured and compared in order to determine the effect of the the irradiation doses on the gas separation properties. The results showed that the ideal selectivity of He/CH4, H2/CH4, CO2/CH4and H2/N2of the irradiation PI membrane can be significantly improved by irradiation of60Co source. The optimum irradiation doses were 50 kGy. The highest ideal selectivity of He/CH4, H2/CH4, CO2/CH4and H2/N2is 3635.86, 2287.57, 282.00 and 205.29, respectively. In other word, the ideal selectivity of He/CH4, H2/CH4, CO2/CH4and H2/N2of the irradiation PI membrane with 50 kGy irradiation doses is 2.27, 2.11, 1.89 and 1.08 times higher than that of the PI membranes without irradiation.

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