| Title: | Ultra-stable fully-aromatic microporous polyamide membrane for molecular sieving of nitrogen over volatile organic compound |
| Author(s): | Zhang Z; Wu Q; Xu S; Yue Z; Zhou H; Jin W; |
| Address: | "State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China; Zhangjiagang Institute of Nanjing Tech University, Suzhou 215699, PR China. Electronic address: zhouhl@njtech.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2023.132151 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Microporous polymer membranes are promising candidates for industrial membrane-based gas separation because of their high separation performance. However, their relatively low stability due to the local rearrangement of polymer chains during usage remains a problem. Hence, we propose the construction of a fully aromatic polymer structure in a microporous polymer membrane to enhance membrane stability. Four triptycene-based microporous polyamides were synthesized via the polymerization of 2,6,14-triaminotriptycene with aromatic acyl chloride and/or aliphatic acyl chlorides. Their properties were characterized and compared by using nuclear magnetic resonance (NMR) and Brunauer-Emmett-Teller analyses. The synthesized polyamides were fabricated into composite membranes by employing a solution process; their stability was evaluated for the molecular sieving of nitrogen over volatile organic compounds such as cyclohexane. Low-field NMR and X-ray photoelectron spectroscopy were used to investigate the differences in the properties of membranes with different structures at different times. The results showed that the fully aromatic polyamide membrane made from 2,6,14-triaminotriptycene and aromatic acyl chloride displayed constant rejection (99 %) and nitrogen permeability (approximately 50 Barrer) for the molecular sieving of nitrogen over cyclohexane during 100-d experiments, indicating good stability. This approach paves the way for the industrialization of microporous polymer membranes from a theoretical perspective" |
| Keywords: | Aromatic structure Nitrogen/VOC separation Polyamide membrane Stability Triptycene; |
| Notes: | "PubMed-not-MEDLINEZhang, Zhiqiang Wu, Qiao Xu, Shilin Yue, Zhongyuan Zhou, Haoli Jin, Wanqin eng Netherlands 2023/07/29 J Hazard Mater. 2023 Oct 5; 459:132151. doi: 10.1016/j.jhazmat.2023.132151. Epub 2023 Jul 25" |
