Poly (Vinylidene Fluride) Membrane Preparation and Characterization: Effects of Mixed Solvents and PEG Molecular Weight
<span style="font-size: medium;"><span style="font-family: Calibri;">In this study, polyvinylidene fluoride (PVDF) ultrafiltration membranes were prepared via immersion precipitation method using a mixture of two solvents triethyl phosphate (TEP) and dimethylacetamide...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Reaserch Institute of Petroleum Industry
2016-10-01
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| Series: | Journal of Petroleum Science and Technology |
| Subjects: | |
| Online Access: | https://jpst.ripi.ir/article_659_fae2e9ad67b2ff5a946b8af572ca9171.pdf |
| Summary: | <span style="font-size: medium;"><span style="font-family: Calibri;">In this study, polyvinylidene fluoride (PVDF) ultrafiltration membranes were prepared via immersion precipitation method using a mixture of two solvents triethyl phosphate (TEP) and dimethylacetamide (DMAc), which had different affinities with the nonsolvent (water). Properties of the prepared membranes were characterized using scanning electron microscope (SEM) and contact angle and membrane porosity measurements. The prepared membranes were further investigated in terms of pure water flux and BSA rejection in cross flow filtration experiments. The results showed that by using a mixture of DMAc and TEP as solvent and changing the mixed solvent composition, membranes with different morphologies from sponge-like to macrovoid containing were obtained. </span></span><br /><span style="font-family: Calibri;"><span style="font-size: medium;">Maximum flux of the prepared membranes with different solvent mixing ratios was obtained for the one with 60%wt TEP in the casting solution of PVDF/TEP-DMAc/ PEG which equals to 76.8 lm<sup>-2</sup></span><span style="font-size: medium;">h</span><sup><span style="font-size: medium;">-1</span></sup><span style="font-size: medium;">. The effect of addition of </span><span style="font-size: medium;">polyethylene glycol with different molecular weight on morphology and performance of the membranes has also been discussed. </span></span> |
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| ISSN: | 2251-659X 2645-3312 |