Premium
Preparation, characterization, and applicability of novel calix[4]arene‐based cellulose acetate membranes in gas permeation
Author(s) -
Farrukh Sarah,
Minhas Fozia T.,
Hussain Arshad,
Memon Shahabuddin,
Bhanger M. I.,
Mujahid M.
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39985
Subject(s) - membrane , permeation , cellulose acetate , fourier transform infrared spectroscopy , polymer , scanning electron microscope , materials science , gas separation , polymer chemistry , chemical engineering , phase inversion , analytical chemistry (journal) , chemistry , nuclear chemistry , chromatography , composite material , biochemistry , engineering
Cellulose acetate (CA) is well known glassy polymer used in the fabrication of gas‐separation membranes. In this study, 5,11,17,23‐tetrakis( N ‐morpholinomethyl)‐25,26,27,28‐tetrahydroxycalix[4]arene (CL) was blended with CA to study the gas‐permeation behavior for CO 2 , N 2 , and CH 4 gases. We prepared the pure CA and CA/CL blended membranes by following a diffusion‐induced phase‐separation method. Three different concentrations of CL (3, 10, and 30 wt %) were selected for membrane preparation. The CA/CL blended membranes were then characterized via Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), and X‐ray diffraction analysis. The homogeneous blending of CL and CA was confirmed in the CA/CL blended membranes by both SEM and AFM analysis. In addition to this, the surface roughness of the CA/CL blended membranes also increased with increasing CL concentration. FTIR analysis described the structural modification in the CA polymer after it was blended with CL too. Furthermore, CL improved the tensile strength of the CA membrane appreciably from 0.160 to 1.28 MPa, but this trend was not linear with the increase in the CL concentration. CO 2 , CH 4 , and N 2 gases were used for gas‐permeation experiments at 4 bars. With the permeation experiments, we concluded that permeability of N 2 was higher in comparison to those of CO 2 and CH 4 through the CA/CL blended membranes. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014 , 131 , 39985.