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POEM-PAcAm梳状共聚物膜的合成、表征及CO/N分离性能

Synthesis, Characterization, and CO/N Separation Performance of POEM--PAcAm Comb Copolymer Membranes.

作者信息

Park Byeong Ju, Kim Na Un, Lee Chang Soo, Kim Jong Hak

机构信息

Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.

出版信息

Polymers (Basel). 2021 Jan 6;13(2):177. doi: 10.3390/polym13020177.

DOI:10.3390/polym13020177
PMID:33419151
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7825499/
Abstract

Alcohol-soluble comb copolymers were synthesized from rubbery poly(oxyethylene methacrylate) (POEM) and glassy polyacrylamide (PAcAm) via economical and facile free-radical polymerization. The synthesis of comb copolymers was confirmed by Fourier-transform infrared and proton nuclear magnetic resonance spectroscopic studies. The bicontinuous microphase-separated morphology and amorphous structure of comb copolymers were confirmed by wide-angle X-ray scattering, differential scanning calorimetry, and transmission electron microscopy. With increasing POEM content in the comb copolymer, both CO permeability and CO/N selectivity gradually increased. A mechanically strong free-standing membrane was obtained at a POEM:PAcAm ratio of 70:30 wt%, in which the CO permeability and CO/N selectivity reached 261.7 Barrer (1 Barrer = 10 cm (STP) cm cm s cmHg) and 44, respectively. These values are greater than those of commercially available Pebax and among the highest separation performances reported previously for alcohol-soluble, all-polymeric membranes without porous additives. The high performances were attributed to an effective CO-philic pathway for the ethylene oxide group in the rubbery POEM segments and prevention of the N permeability by glassy PAcAm chains.

摘要

通过经济简便的自由基聚合反应，由橡胶状的聚（甲基丙烯酸氧乙烯酯）（POEM）和玻璃状的聚丙烯酰胺（PAcAm）合成了醇溶性梳状共聚物。通过傅里叶变换红外光谱和质子核磁共振光谱研究证实了梳状共聚物的合成。通过广角X射线散射、差示扫描量热法和透射电子显微镜证实了梳状共聚物的双连续微相分离形态和无定形结构。随着梳状共聚物中POEM含量的增加，CO渗透率和CO/N选择性均逐渐增加。在POEM:PAcAm重量比为70:30时获得了机械强度高的独立膜，其中CO渗透率和CO/N选择性分别达到261.7 Barrer（1 Barrer = 10 cm(STP) cm cm s cmHg）和44。这些值大于市售的Pebax的值，并且是先前报道的不含多孔添加剂的醇溶性全聚合物膜的最高分离性能之一。高性能归因于橡胶状POEM链段中环氧乙烷基团的有效亲CO途径以及玻璃状PAcAm链对N渗透率的抑制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/55cf98634bdc/polymers-13-00177-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/a6179eebf1ad/polymers-13-00177-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/59c6af47476b/polymers-13-00177-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/c9450934ac5d/polymers-13-00177-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/74b8e7ff5477/polymers-13-00177-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/ed6fc5b982f6/polymers-13-00177-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/e21ae2aa1832/polymers-13-00177-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/4e3cd99c8c54/polymers-13-00177-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/e6261f31970a/polymers-13-00177-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/55cf98634bdc/polymers-13-00177-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/a6179eebf1ad/polymers-13-00177-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/59c6af47476b/polymers-13-00177-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/c9450934ac5d/polymers-13-00177-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/74b8e7ff5477/polymers-13-00177-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/ed6fc5b982f6/polymers-13-00177-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/e21ae2aa1832/polymers-13-00177-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/4e3cd99c8c54/polymers-13-00177-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/e6261f31970a/polymers-13-00177-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf6/7825499/55cf98634bdc/polymers-13-00177-g008.jpg

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