Thirty-minute preparation of microporous polyimides with large surface areas for ammonia adsorption

Toxic solvents and catalysts, tedious monomer synthesis, and long reaction time significantly limit the sustainable and large-scale preparation and practical application of microporous polyimides (MPIs). In this work, three kinds of MPIs were successfully prepared through thermal polycondensation in...

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Bibliographic Details
Published in:Green chemistry : an international journal and green chemistry resource : GC 2020-10, Vol.22 (2), p.73-79
Main Authors: Zhu, Tingting, Pei, Baoyou, Di, Tuo, Xia, Yunxia, Li, Tiesheng, Li, Lei
Format: Article
Language:English
Subjects:
Adsorption
Ammonia
Catalysts
Chemical synthesis
Dianhydrides
Green chemistry
Polyimide resins
Reaction time
Regeneration
Solvents
Surface chemistry
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Summary:Toxic solvents and catalysts, tedious monomer synthesis, and long reaction time significantly limit the sustainable and large-scale preparation and practical application of microporous polyimides (MPIs). In this work, three kinds of MPIs were successfully prepared through thermal polycondensation in the diphenyl sulfone (DPS) solvent using 1,4,5,8-naphthalenetetracarboxylic dianhydride and triamines as building blocks. The polymerization can be completed in 30 min, and the resultant MPIs exhibit large surface areas up to 1825 m 2 g −1 . Owing to their abundant microporous structures and plenty of imide rings, MPIs demonstrate excellent ammonia adsorption performance (21.10 wt%, at 303 K and 1.0 bar) and favorable regeneration ability. DPS as a non-volatile solvent can be recovered and recycled three times. In comparison with previous reports, this strategy is more time efficient, environmentally friendly and potentially scalable. The preparation of microporous polyimides with large surface areas was completed in 30 minutes.
ISSN:1463-9262
1463-9270
DOI:10.1039/d0gc02794d