中国塑料 ›› 2024, Vol. 38 ›› Issue (6): 51-59.DOI: 10.19491/j.issn.1001-9278.2024.06.008

• 材料与性能 • 上一篇    下一篇

刚性基团桥接聚硅氧烷/乙基纤维素混合膜的制备及其CO2的分离

范文轩1,2,3(), 徐双平1,2(), 贾宏葛1,2, 张明宇1,2, 蘧延庆1,2   

  1. 1.齐齐哈尔大学材料科学与工程学院,黑龙江 齐齐哈尔 161006
    2.黑龙江省聚合物基复合材料重点实验室,黑龙江 齐齐哈尔 161006
    3.齐齐哈尔大学化学与化学工程学院,黑龙江 齐齐哈尔 161006
  • 收稿日期:2023-10-30 出版日期:2024-06-26 发布日期:2024-06-20
  • 通讯作者: 徐双平,副教授,硕士生导师,研究方向为分离和吸附材料的制备及应用,02228@qqhru.edu.cn
    E-mail:18340780380@163.com;02228@qqhru.edu.cn
  • 作者简介:范文轩(1995-),男,硕士研究生,研究方向为桥接聚硅氧烷气体分离膜的制备,18340780380@163.com
  • 基金资助:
    国家自然科学基金青年基金(52203093);黑龙江省聚合物基复合材料重点实验室开放课题(CLKFKT2021B10)

Preparation of rigid⁃group⁃bridged polysiloxanes/ethylcellulose mixed membranes for CO2 separation

FAN Wenxuan1,2,3(), XU Shuangping1,2(), JIA Hongge1,2, ZHANG mingyu1,2, QU Yanqing1,2   

  1. 1.School of Materials Science and Engineering,Qiqihar University,Qiqihar 161006,China
    2.Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials,Qiqihar 161006,China
    3.School of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China
  • Received:2023-10-30 Online:2024-06-26 Published:2024-06-20
  • Contact: XU Shuangping E-mail:18340780380@163.com;02228@qqhru.edu.cn

摘要:

以3种含刚性基团(六氟酰亚胺、萘基酰亚胺和芴)桥接聚硅氧烷(6FBPMS、NTBPMS和BAFBPMS)为改性剂,乙基纤维素(EC)为基质,通过溶液共混、涂敷法制备了3类不同负载量桥接聚硅氧烷的改性EC混合膜(6FBPMS/EC、NTBPMS/EC和BAFBPMS/EC)。3类复合膜具有良好的成膜性,且显示出高的力学性能和热稳定性。测试了混合膜对体积比都为1∶1的混合气体对CO2/N2和CO2/CH4的透过选择性。结果表明,相较于纯EC膜,3类膜在保持选择性的同时,显示出更高的CO2透过性;特别是NTBPMS/EC混合膜,其对CO2透过性达到213 barrer以上,是纯EC的4.9倍。

关键词: 桥接聚硅氧烷, 乙基纤维素, 混合膜, 气体分离

Abstract:

Three types of rigid⁃group⁃bridged polysiloxanes⁃modified ethylcellulose (EC) mixed membranes were prepared by using three bridged⁃polysiloxanes with different rigid groups of hexafluoroimide, naphthalimide, and fluorene as modifiers and EC as a substrate, through solution co⁃blending and coating. The three mixed membranes exhibited a good film formation ability, high mechanical properties, and good thermal stability. Compared to pure EC membrane, the three mixed membranes gained an improvement in the permeability of CO2 without sacrificing selectivity (CO2/N2 and CO2/CH4). Especially, the naphthalimide bridged⁃polysiloxanes obtained a CO2 permeation coefficient of over 213 barrers, which is 4.9 times higher than pure EC membrane.

Key words: bridged?polysiloxanes, ethyl cellulose, mixed membrane, gas separation

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