Please use this identifier to cite or link to this item:
https://doi.org/10.1016/j.memsci.2008.11.036
Title: | β-Cyclodextrin containing Matrimid® sub-nanocomposite membranes for pervaporation application | Authors: | Jiang, L.Y. Chung, T.S. |
Keywords: | β-Cyclodextrin Asymmetry of dense membrane Matrimid® polyimide Pervaporation Sub-nanocomposite membrane |
Issue Date: | 5-Feb-2009 | Citation: | Jiang, L.Y., Chung, T.S. (2009-02-05). β-Cyclodextrin containing Matrimid® sub-nanocomposite membranes for pervaporation application. Journal of Membrane Science 327 (1-2) : 216-225. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2008.11.036 | Abstract: | Molecular-level mixed matrix membranes made of Matrimid®/β-cyclodextrin (β-CD) sub-nanocomposites for dehydrating isopropanol by pervaporation have been fabricated and studied. The separation efficiency of such membranes containing ∼2 to 10 wt.% of β-CD is superior over the neat Matrimid® membrane in terms of both flux and separation factor. However, phase separation due to β-CD agglomeration occurs with an increase in β-CD loading. Asymmetry in both morphology and surface property has also been observed. The separation properties depend upon the membrane mounting mode (i.e., using air-side or glass-side of the membrane against the feed during pervaporation tests). The flux and separation factor of both modes, nevertheless, display the same increase-and-decrease dependence on β-CD loading. The unique characteristics of β-CD such as hydrophilic exterior and interior cavity and the interactions between β-CD molecules and the polymer matrix may create additional interface channels for water diffusion and provide size discrimination and chain rigidification for water/isopropanol selection. As a result, compared to mixed matrix membranes incorporated MgO or zeolite nanoparticles, embedding a low percentage of β-CD into the Matrimid® leads to the enhanced and superior separation efficiency. On the other hand, a higher loading of β-CD deteriorates separation performance due to the formation of a non-permeable β-CD network. The proposed Matrimid®/β-CD mixed matrix materials may open new perspective for the development of mixed-matrix hollow-fiber membranes because of the sub-nano-sized β-CD and its unique molecular-level mixing characteristics. © 2008 Elsevier B.V. All rights reserved. | Source Title: | Journal of Membrane Science | URI: | http://scholarbank.nus.edu.sg/handle/10635/90510 | ISSN: | 03767388 | DOI: | 10.1016/j.memsci.2008.11.036 |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
SCOPUSTM
Citations
60
checked on Feb 3, 2023
WEB OF SCIENCETM
Citations
51
checked on Feb 3, 2023
Page view(s)
225
checked on Feb 2, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.