Molecular structure influence of porous intrinsic polyimide nanofiber for high temperature flue gas filtration: Bisphenol AF, sulfone, ether bonds and hydroxyl groups
Good atmospheric environment is the prerequisite for green development of technology. Industrial waste gas emission is one of the major causes of air pollution. To investigate the influence of Polyimide (PI) molecular structure on properties (especially thermal performance) and macroscopic porosity,...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Materials Today Advances |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590049825000098 |
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| Summary: | Good atmospheric environment is the prerequisite for green development of technology. Industrial waste gas emission is one of the major causes of air pollution. To investigate the influence of Polyimide (PI) molecular structure on properties (especially thermal performance) and macroscopic porosity, 6FAP, HFBAPP, and BAPS were used to aggregate with 6FDA, respectively. The obtained Polyamide acid (PAA) solution was used to prepare PAA nanofiber (NFs) membranes by electrospinning technology, and PI nanofiber membranes were obtained by high-temperature dehydration condensation. ODPA copolymerization is the intrinsic modification method in this work. The differences in thermal properties, mechanical properties, surface morphology, and air filtration performance of PI nanofiber membranes were examined with six different formulations. The results showed that the PI-ODPA copolymerization nanofibers had high pore structure, and the particle filtration performance increased accordingly. The particle filtration performances of 6FAP-6FDA, HFBAPP-6FDA, and BAPS-6FDA were all exceed 81 %. After ODPA copolymerized modification, HFBAPP-6FDA-ODPA nanofiber membranes can reach a maximum of 95.42 %. In addition, the Tg and Td5 of all NFs reached 250 °C and 455 °C, indicating good thermal performance. Based on the above studies, the performance of PI NFs membrane can be improved by molecular structure designed and copolymerization, with a broader application prospect in the field of high-temperature filtration. |
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| ISSN: | 2590-0498 |