Thin film composite sodium alginate membranes for dehydration of acetic acid and isobutanol

ABSTRACT Dehydration of widely used organic solvents such as acetic acid (AA) and isobutanol (IB) is challenging tasks, which form close boiling mixtures with water. Sodium alginate (SA) thin film composite membranes were prepared and crosslinked with 2,4‐toluene diisocyanate (TDI) and glutaraldehyd...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied polymer science 2014-03, Vol.131 (6), p.np-n/a
Main Authors: Badiger, Hemalata, Shukla, Sushumna, Kalyani, Swayampakula, Sridhar, Sundergopal
Format: Article
Language:English
Subjects:
Acetic acid
Applied sciences
composites
Crosslinking
Dehydration
Exact sciences and technology
Exchange resins and membranes
Forms of application and semi-finished materials
Fourier transforms
hydrophilic polymers
Isobutanol
Materials science
Membranes
Polymer industry, paints, wood
Polymers
separation techniques
Sodium alginate
Solvents
Technology of polymers
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ABSTRACT Dehydration of widely used organic solvents such as acetic acid (AA) and isobutanol (IB) is challenging tasks, which form close boiling mixtures with water. Sodium alginate (SA) thin film composite membranes were prepared and crosslinked with 2,4‐toluene diisocyanate (TDI) and glutaraldehyde for dehydration of IB and AA/water mixtures through pervaporation (PV). The crosslinked and uncrosslinked SA composite membranes were characterized by Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction, thermogravimetric analysis, scanning electron microscopy, and universal testing machine for intermolecular interactions, crystalline nature, thermal stability, surface morphology, and tensile strength, respectively. At a feed composition of 98 wt % IB and 95 wt % AA aqueous solutions, the TDI crosslinked SA composite membrane exhibited separation factors of 3229 and 708 with reasonable fluxes of 0.021 and 0.012 kg m−2 h−1, respectively. The results obtained in the study for IB and AA systems were compared with other SA membranes reported in the literature. The membranes appeared to have potential for commercial PV ability to dehydrate the solvents up to desirable purity levels (>99%) and feasibility of preparing them in a composite form which would enable scale‐up into modular configurations. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014, 131, 40018.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.40018