Journal
CHEMICAL ENGINEERING SCIENCE
Volume 66, Issue 8, Pages 1565-1575Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2010.12.019
Keywords
PVDF; Hollow fibre membrane; Stability; Chemical resistance; Sodium hydroxide; Mechanical strength
Categories
Funding
- EPSRC in the United Kingdom [EP/D068851/1]
- Engineering and Physical Sciences Research Council [EP/D068851/1] Funding Source: researchfish
- EPSRC [EP/D068851/1] Funding Source: UKRI
Ask authors/readers for more resources
The stability of PVDF hollow fibre membranes in sodium hydroxide (NaOH) aqueous solutions were investigated in this study. PVDF hollow fibre membranes were prepared from each of the three commercial raw PVDF materials (Kynar761, Solef 1015 and Solef 6010) from two major suppliers (AtofinaChemicalsInc., USA and Solvay, Belgium) for comparison purposes. The effect of NaOH concentration, treatment time and temperature on mechanical properties, thermal properties and crystalline structure of the PVDF hollow fibre membranes were investigated through mechanical strength measurement, surface area analysis, XRD, FTIR and DSC analyses. The obtained results indicate that the reaction between PVDF and NaOH was initiated even at low concentrations of NaOH and was aggravated with the extended treatment time, resulting in the decrease in mechanical strength and crystallinity of PVDF hollow fibre membranes. The reaction was accelerated and intensified by increasing the concentration of NaOH and/or treatment temperature. At 70 degrees C, the mechanical integrity of the PVDF membranes was completely destroyed in 4 wt% NaOH solution within 24 h or in 10 wt% NaOH solution within 8 h. The deterioration of stability in NaOH solutions is considered universal for all PVDF employed in this study, irrespective of the raw materials or the corresponding hollow fibre membranes. (C) 2010 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available