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提高硅橡胶的黏附性制备多层复合膜

作者：张旭，孟令鹏，李培

单位：北京化工大学，材料科学与工程学院，北京 100029

关键词： PDMS；Pebax；多层复合膜；CO2分离

DOI号：

分类号： TQ31

出版年,卷(期):页码： 2020,40(6):37-43

摘要：

气体分离膜通常以多层复合膜的形式为主。在最外层皮层和多孔支撑层之间的中间层聚合物需要有高气体传质性能和优异的涂覆性能。硅橡胶（PDMS）是理想的中间层材料，然而其低表面能难以黏附第二层涂覆材料。本文以商业化的硅橡胶和添加剂为原料。通过优化添加剂配比，有效地提高了PDMS层的黏附力，并制备了Pebax/PDMS/PAN三层中空纤维复合膜。当硅橡胶与添加剂配比为1：3，Pebax涂覆液的质量浓度为3 wt%时，复合膜的CO2通量为115.6 GPU，CO2/N2选择性为29.3。证明经过调控的硅橡胶层表面更容易黏附连续的无缺陷Pebax层。

Gas separation membranes typically have multi-layer structures with a gutter layer. The gutter layer shall have high gas permeability and good coating property. Polydimethylsiloxane(PDMS) is an ideal gutter layer material. Its low surface energy is good for coating on to other materials. However, other materials are difficult to be coated on PDMS. In this study, we used commercially available PDMS and CRA additives. We studied the functionality of CRA on the increments of adhesive property of PDMS. When the composition of PDMS to CRA was 1:3 (w:w), a three layer hollow fiber composite membrane Pebax/PDMS/PAN was successfully prepared. The CO2 permeance and CO2/N2 selectivity of the composite membrane were 115.6 GPU, and 29.3, respectively. This result demonstrated that the Pebax layer was successfully coated onto the PDMS surface.

基金项目：

国家自然科学基金（51773011）

作者简介：

张旭（1995-），男，山东菏泽人，硕士，从事气体分离膜研究。E-mail：zx18765039316@163.com

参考文献：

[1]王保国, 文湘华, 陈翠仙. 膜分离技术在石油化工中应用研究现状 [J]. 化工进展, 2002,32(12): 8-12.
[2]Baker R W, Low B T. Gas Separation Membrane Materials: A Perspective [J]. Macromolecules, 2014, 47(20): 6999-7013.
[3]Ibrahim, M .H., El-Naas M Het al., Zhang Z, et al. CO2 Capture Using Hollow Fiber Membranes: A Review of Membrane Wetting [J]. Energy & Fuels, 2018,. 32(2): p. 963-978.
[4]季鹏飞, 曹义鸣，介兴明，等et al., CO_2分离中空纤维复合膜的制备及其气体渗透性能的研究[J]. 石油化工, 2010,(09): p. 63-67.
[5]Chen, H .Z., Tong Z, Li P, et al., High performance composite hollow fiber membranes for CO2/H2 and CO2/N2 separation [J]. International Journal of Hydrogengen Energyy, 2014,. 39(10): p. 5043-5053.
R.W. Baker R W, K. Lokhandwala K., Natural gas processing with membranes: an overview [J]w.,
[6] Ind. Eng. Chem. Res,. 47 (2008, 47:) 2109–2121.
[7]Pei Li P, HangZheng Chen H Z, Tai-Shung Chung T S., The effects of substrate characteristics and pre-wetting agents on PAN–PDMS composite hollow fiber membranes for CO2/N2 and O2/N2 separation [J]., Journal of Membrane Science,4 34(2013, 34: )18–25.
[8]Henis JJ .M .S. Henis, M.K. Tripodi M K., Composite hollow fiber membranes for gas separation: the resistance model approach [J]., J. Membr. Sci., 8 (1981 34:) 233–246.
[9]Esposito, E., Clarizia G, Bernardo P, et al., Pebax®/PAN hollow fiber membranes for CO2/CH4 separation [J]. Chemical Engineering and Processing - Process Intensification, 2015,. 94: p. 53-61.
[10]Rahman, M .M., Filiz V, Shishatskiy S, et al., PEBAX®; with PEG functionalized POSS as nanocomposite membranes for CO2 separation [J]. Journal of Membrane Science, 2013,. 437: p. 286-297.
[11]陈星妤，李燕，许振良，等魏永明，杨虎. DMAc-GCTA混合溶剂对PVDF/P(AA-co-MMA)中空纤维膜的影响[J]. 膜科学与技术，2016,36(5): 36-39.
[12]L Deng, L, J. Yan J, Y. Xue Y, et al.B Cao, Pei. Li*, Oxidative crosslinking of copolyimides at sub-Tg temperatures to enhance resistance against CO2-induced plasticization [J]., Journal of Membrane Science, 583(2019), 583: 40-48.
[13]伍勇东，赵丹，任吉中，等李晖，姜冬，季洁梅，邓麦村. P，Pebax/TPP共混膜的制备及CO2分离性能研究[J].膜科学与技术，2020，第40卷(，第1)期:，37-44页.

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