Novel thermally stable and soluble triarylamine functionalized polyimides for gas separation

Yen, Hung‐Ju; Wu, Jiahao; Huang, Yun-Hsuan; Wang, Wenchang; Lee, Kueir‐Rarn; Liou, Guey‐Sheng

doi:10.1039/c4py00449c

Cited by 43 publications

(24 citation statements)

References 34 publications

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“…Polyimide 3 has a glass transition temperature of 310 °C, which is similar to the T g of polyimide 2 . Polyimide 4 is synthesized from the monomers 6F‐DA and 2,2‐bis(4‐aminophenyl)hexafluoropropane in benzoic acid. The achieved inherent viscosity is 0.52 dL g −1 .…”

Section: Resultsmentioning

confidence: 99%

Fluorinated Aromatic Polyimides as High-Performance Electret Materials

Erhard

Richter

Bartz

et al. 2015

Macromol. Rapid Commun.

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In view of the increasing significance of technology-driven devices such as microelectromechanical systems, energy-harvesting devices, and organic field effect transistors, polymer electret materials with durable electret performance at elevated temperatures become more and more important. However, typical polymer electret materials lose their performance at elevated temperatures. To provide polymer materials with improved electret performance over a broad temperature range, a series of aromatic polyimides with different degree of fluorosubstitution is presented. Isothermal surface potential decay measurements at elevated temperatures reveal that minor differences in the chemical structure have a major influence on the electret behavior. The best performance is found for the polyimide containing a hexafluoroisopropylidene moiety in both the bisanhydride- and the diamine-based unit. Excellent long-term charge storage stability at 120 °C is observed. From the initial surface charge 94% remains after 24 h. This polyimide even tolerates short-term exposure of 30 s at 300 °C with almost no loss of performance. These findings demonstrate that this particular polyimide is suitable for device applications at elevated temperatures during fabrication and use.

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Section: Resultsmentioning

confidence: 99%

Fluorinated Aromatic Polyimides as High-Performance Electret Materials

Erhard

Richter

Bartz

et al. 2015

Macromol. Rapid Commun.

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“…Another PI with twisted Me 3 TPA by Yen et al . showed a high CO 2 permeability and CO 2 /CH 4 permselectivity . Recently, Bisoi et al .…”

Section: Introductionmentioning

confidence: 96%

“…So far, several polymers with rigid three‐dimensional propeller‐shaped triphenylamine (TPA) have been developed to investigate gas permeability . The rigid kink structure of TPA increases the stiffness of the polymer which leads to increase of interchain distance and helps to improve both permeability and selectivity .…”

Section: Introductionmentioning

confidence: 99%

Soluble polyimides with propeller shape triphenyl core for membrane based gas separation

Dutta

Bisoi

Mukherjee

et al. 2018

J of Applied Polymer Sci

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This article reports the synthesis and characterization of a series of new aromatic polyimides (PIs) having bulky tert butyl group containing propeller shaped triphenylamine unit in its structure. The PIs were prepared by the reaction of 4,4′‐diamino‐4″‐(2,4,6‐tri‐tert‐butylphenoxy) triphenylamine with different commercially available aromatic dianhydrides through the formation of corresponding poly(amic acid)s and subsequent thermal cycloimidization. The PIs showed high glass transition temperature (Tg up to 270 °C) and thermal stability (Td10 up to 475 °C). The PI membranes showed good mechanical properties with tensile strength up to 70 MPa, excellent separation performance [P(CO2) = 100.8, P(O2) = 40.4 barrer], and good permselectivity [P(CO2)/P(CH4) = 50.9, P(O2)/P(N2) = 7.6]. The membranes exhibited extremely high solubility selectivity for the CO2/CH4 gas pair due to the strong affinity between CO2 and nitrogen atoms of tertiary amine in triphenylamine. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46658.

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“…In addition, fluorinecontaining polymers are known for their low dielectric constant and low water absorption rates. The incorporation of bulky and propeller-shaped triphenylamine (TPA) in the polyimide backbone improves gas separation performance [25]. The bis(phenyl)fluorene based cardo polymers contain a structure of bulky fluorene moiety projects vertically from the polymer main chain [4].…”

Section: Introductionmentioning

confidence: 99%