Mechanically Tough, Thermally Rearranged (TR) Random/Block Poly(benzoxazole-co-imide) Gas Separation Membranes
Mechanically Tough, Thermally Rearranged (TR) Random/Block Poly(benzoxazole-co-imide) Gas Separation Membranes
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DOI：
10.1021/acs.macromol.5b00930
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发表时间：
2015-07
期刊：
影响因子：
5.5
通讯作者：
Yongbing Zhuang;J. Seong;Won Hee Lee;Yu Seong Do;Moon Joo Lee;Gang Wang;M. Guiver;Y. Lee
中科院分区：
文献类型：
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作者：
Yongbing Zhuang;J. Seong;Won Hee Lee;Yu Seong Do;Moon Joo Lee;Gang Wang;M. Guiver;Y. Lee
机械性能不足是阻碍热重排（TR）膜在大规模气体分离应用中商业化的主要障碍之一。将预先形成的苯并恶唑/苯并咪唑单元引入到邻羟基共聚酰亚胺前体中，其本身随后热重排以形成额外的苯并恶唑单元，首次制备。使用市售单体，机械坚韧膜制备的无规和嵌段TR聚（苯并恶唑-共-酰亚胺）共聚物（TR-PBOI）的气体分离进行了研究。的化学结构，共聚模式，和o-羟基共聚聚酰亚胺的分子堆积和性能，包括气体传输，所得到的TR-PBOI膜的热保持时间的影响进行了详细研究。在400 °C下处理后，坚韧TR-PBOI膜表现出71.4- 113.9MPa的拉伸强度和5.1- 16.1%的断裂伸长率。此外，他们还提出了高…
Insufficient mechanical properties are one of the major obstacles for the commercialization of ultrahigh permeability thermally rearranged (TR) membranes in large-scale gas separation applications. The incorporation of preformed benzoxazole/benzimidazole units into o-hydroxy copolyimide precursors, which themselves subsequently thermally rearrange to form additional benzoxazole units, were prepared for the first time. Using commercially available monomers, mechanically tough membranes prepared from random and block TR poly(benzoxazole-co-imide) copolymers (TR-PBOI) were investigated for gas separation. The effects of the chemical structures, copolymerization modes, and thermal holding time of o-hydroxy copolyimides on the molecular packing and properties, including gas transport, for the resulting TR-PBOI membranes have been examined in detail. After treatment at 400 °C, tough TR-PBOI membranes exhibited tensile strengths of 71.4–113.9 MPa and elongation at break of 5.1–16.1%. Moreover, they presented hig...