Vacuum-assisted tailoring of pore structures of phenolic resin derived carbon membranes

Abd Jalil, Siti Nurehan, Wang, David K., Yacou, Christelle, Motuzas, Julius, Smart, Simon and Diniz da Costa, João C. (2017) Vacuum-assisted tailoring of pore structures of phenolic resin derived carbon membranes. Journal of Membrane Science, 525 240-248. doi:10.1016/j.memsci.2016.11.002

Author Abd Jalil, Siti Nurehan
Wang, David K.
Yacou, Christelle
Motuzas, Julius
Smart, Simon
Diniz da Costa, João C.
Title Vacuum-assisted tailoring of pore structures of phenolic resin derived carbon membranes
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
Publication date 2017-03-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.memsci.2016.11.002
Open Access Status Not yet assessed
Volume 525
Start page 240
End page 248
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
This work shows the preparation and separation performance assessment of carbon membranes derived from phenolic resin by a vacuum-assisted method and carbonisation in an inert atmosphere. The vacuum time played an important role in tailoring the structure of the membranes. For instance, pore volumes and surface areas increased from 0.81 and 834 to 2.2 cm3 g−1 and 1910 m2 g−1, respectively, as the vacuum time exposure increased from 0 to 1200 s. The significant structural changes correlated very well with water permeation, as fluxes increased by 91% as the vacuum time increased from 0 to 1200 s reaching up to 169 L m−2 h−1 at 5 bar. Molecular weight cut-off tests showed no rejection for the smaller glucose and sucrose molecules, though this increased to ~ 80% and full rejection for 36 kDa and 400 kDa polyvinyl pyrrolidine. Interestingly, FTIR spectra showed that the peaks of C–H stretching vibration (2800–3200 cm−1) and C–O stretching (1030 cm−1) became more pronounced as a function of increasing vacuum time, strongly suggesting that the use of vacuum further assisted in the polycondensation of phenolic oligomers. Based on these outcomes, a cluster to cluster model is proposed, whereby vacuum application promoted crosslinking reactions of the phenolic resin, creating microporous regions within the clusters, and mesoporous regions between the clusters.
Keyword Carbon membranes
Molecular weight cut-off
Vacuum-assisted method
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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