Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 17, Pages 7732-7737Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta10395b
Keywords
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Funding
- National Natural Science Foundation of China [21376225]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [16HASTIT004]
- Excellent Youth Development Foundation of Zhengzhou University [1421324066]
- China Scholarship Council [201208410135]
- Australia Awards Scholarship
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Graphene oxide (GO) has been considered as a promising candidate for molecular separation because of its capability to form highly efficient gas flow intergalleries. However, a major challenge is the lack of a facile, scalable, low-costmembrane fabrication approach, especially for the hollow fiber composite membrane with a thin selective layer. By using a facile dip-coating technique, we prepared a shear-aligned GO/Pebax composite hollow fiber membrane on a porous polymeric support. The incorporation of the aligned GO laminates significantly improved the original Pebax (polyethylene oxide-polyamide block copolymer) membrane permeancewithout compromising the CO2/N-2 selectivity, and the composite membrane had good operational stability and enhanced mechanical strength. We further investigated the formation mechanism of the shear-aligned GO structure and discovered that the control of the withdrawal speed and liquid film thickness was a key factor. This dip-coating technique offers significant opportunities to exploit the GO-based membrane for industrial CO2 capture.
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