Next Article in Journal
Descriptive Analysis of LAP1 Distribution and That of Associated Proteins throughout Spermatogenesis
Previous Article in Journal
Performance of Hybrid Photocatalytic-Ceramic Membrane System for the Treatment of Secondary Effluent
Article Menu

Export Article

Open AccessArticle
Membranes 2017, 7(2), 21; doi:10.3390/membranes7020021

Effects of Phase Separation Behavior on Morphology and Performance of Polycarbonate Membranes

Department of Chemical Engineering, Universiti Teknologi Petronas, Bandar Seri Iskandar 31620, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Shiro Suetsugu
Received: 26 December 2016 / Revised: 18 January 2017 / Accepted: 20 January 2017 / Published: 5 April 2017
(This article belongs to the Section Membrane Fabrication and Characterization)
View Full-Text   |   Download PDF [5209 KB, uploaded 5 April 2017]   |  

Abstract

The phase separation behavior of bisphenol-A-polycarbonate (PC), dissolved in N-methyl-2-pyrrolidone and dichloromethane solvents in coagulant water, was studied by the cloud point method. The respective cloud point data were determined by titration against water at room temperature and the characteristic binodal curves for the ternary systems were plotted. Further, the physical properties such as viscosity, refractive index, and density of the solution were measured. The critical polymer concentrations were determined from the viscosity measurements. PC/NMP and PC/DCM membranes were fabricated by the dry-wet phase inversion technique and characterized for their morphology, structure, and thermal stability using field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis, respectively. The membranes’ performances were tested for their permeance to CO2, CH4, and N2 gases at 24 ± 0.5 °C with varying feed pressures from 2 to 10 bar. The PC/DCM membranes appeared to be asymmetric dense membrane types with appreciable thermal stability, whereas the PC/NMP membranes were observed to be asymmetric with porous structures exhibiting 4.18% and 9.17% decrease in the initial and maximum degradation temperatures, respectively. The ideal CO2/N2 and CO2/CH4 selectivities of the PC/NMP membrane decreased with the increase in feed pressures, while for the PC/DCM membrane, the average ideal CO2/N2 and CO2/CH4 selectivities were found to be 25.1 ± 0.8 and 21.1 ± 0.6, respectively. Therefore, the PC/DCM membranes with dense morphologies are appropriate for gas separation applications. View Full-Text
Keywords: binodal curve; cloud point; phase separation; membrane morphology; performance binodal curve; cloud point; phase separation; membrane morphology; performance
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Idris, A.; Man, Z.; Maulud, A.S.; Khan, M.S. Effects of Phase Separation Behavior on Morphology and Performance of Polycarbonate Membranes. Membranes 2017, 7, 21.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Membranes EISSN 2077-0375 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top