Journal
POLYMER
Volume 55, Issue 6, Pages 1384-1396Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2013.11.046
Keywords
2D(planar) surface modifier; Highly selective photocyclic; aromatization(SCAT); Oxygen permselectivity
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Funding
- Japan Society for the Promotion of Science [19350054, 25810068, 25390002]
- National Natural Science Foundation of China [21204014, U1162123, 51103076]
- Fundamental Research Funds for the Central Universities, China [HEUCFR1227, HEUCFT1009]
- Grants-in-Aid for Scientific Research [26620096, 25810068] Funding Source: KAKEN
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A facile synthesis of novel five 2D (planar) surface modifiers having a triphenylbenzene derivatives as a 2D structure has been achieved by the highly selective photocyclic aromatization reaction. Efficient enhancement of oxygen permselectivities through the three polymer membranes has been achieved by adding a small amount (< 5.0 wt%) of the 20 surface modifiers. Among the five 2D surface modifiers, a modifier compound having oligoethylene oxide groups showed the best performance for the enhancement. These improvements were thought to be caused mainly by improvement of the solution selectivity on the membrane surface where the 2D surface modifiers were accumulated. In some of the surface-modified blend membranes, their plots in the P-O2(-alpha) graph were over or close to the upper boundary line by Robeson in 1991. Since all the membranes containing the 2D surface modifiers showed better permselectivities than the corresponding substrate membranes, it is very promising for the future. (C) 2013 Elsevier Ltd. All rights reserved.
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