Synthesis, Characterization and Gas Transport Properties of Polynaphthalimides Membranes

doi:10.11944/j.issn.1000-0518.2017.11.170042

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (11): 1265-1272.DOI: 10.11944/j.issn.1000-0518.2017.11.170042

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Synthesis, Characterization and Gas Transport Properties of Polynaphthalimides Membranes

BI Weihui^a^b,MAO Hongchao^a,ZHANG Suobo^a^c^*()

^aKey Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^bUniversity of Chinese Academy of Sciences,Beijing 100049,China
^cJiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing 211816,China

Received:2017-02-22 Accepted:2017-04-27 Published:2017-11-08 Online:2017-11-08
Contact: ZHANG Suobo
Supported by:
Supported by the National Natural Science Foundation of China(No.51473163, No.51503199)

Abstract

Abstract:

A series of novel polynaphthalimides(PNIs) was synthesized from 1,4,5,8-naphthalenetracarboxylic dianhydride and several diamines containing alkyl substituents in the o-position. Almost all the PNIs with alkyl substituents in the o-position are readily soluble in polar solvents and can be solution-cast to transparent and tough films. The films have tensile strengths, elongations at break, and tensile module in the range of 54~77 MPa, 6.4%~8.1%, and 1.3~2.2 GPa, respectively. The PNIs exhibit excellent thermal stabilities with the onset decomposition temperature ranging from 448 to 501 ℃. The glass transition temperatures of the PNIs are in the range of 382 to 391 ℃. The CO₂ permeability coefficients and permeability selectivities of CO₂ to CH₄ of the PNIs are in the range of 37.2~151 barrer and 20.9~31.7, respectively, making these novel polynaphthalimides potentially useful candidate materials for membranes in natural gas purification.

Key words: naphthalene dianhydride, polynaphthalimides, gas separation, membrane material

BI Weihui, MAO Hongchao, ZHANG Suobo. Synthesis, Characterization and Gas Transport Properties of Polynaphthalimides Membranes[J]. Chinese Journal of Applied Chemistry, 2017, 34(11): 1265-1272.

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Synthesis, Characterization and Gas Transport Properties of Polynaphthalimides Membranes

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