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Surface Properties, Free Volume, and Performance for Thin-Film Composite Pervaporation Membranes Fabricated through Interfacial Polymerization Involving Different Organic Solvents
- Source :
- Polymers, Vol 12, Iss 2326, p 2326 (2020), Polymers, Volume 12, Issue 10
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- The type of organic solvents used in interfacial polymerization affects the surface property, free volume, and separation performance of the thin-film composite (TFC) polyamide membrane. In this study, TFC polyamide membrane was fabricated through interfacial polymerization between diethylenetriamine (DETA) and trimesoyl chloride (TMC). Four types of organic solvent were explored in the preparation of pervaporation membrane. These are tetralin, toluene, hexane, and isopentane. The solubility parameter distance between organic solvents and DETA follows in increasing order: tetralin (17.07 MPa1/2) &lt<br />toluene (17.31 MPa1/2) &lt<br />hexane (19.86 MPa1/2) &lt<br />isopentane (20.43 MPa1/2). Same trend was also observed between the organic solvents and DETA. The larger the solubility parameter distance, the denser and thicker the polyamide. Consequently, field emission scanning electron microscope (FESEM) and positron annihilation spectroscopy (PAS) analysis revealed that TFCisopentane had the thickest polyamide layer. It also delivered the highest pervaporation efficiency (permeation flux = 860 &plusmn<br />71 g m&minus<br />2 h&minus<br />1<br />water concentration in permeate = 99.2 &plusmn<br />0.8 wt%<br />pervaporation separation index = 959,760) at dehydration of 90 wt% aqueous ethanol solution. Furthermore, TFCisopentane also exhibited a high separation efficiency in isopropanol and tert-butanol. Therefore, a suitable organic solvent in preparation of TFC membrane through interfacial polymerization enables high pervaporation efficiency.
- Subjects :
- Materials science
Polymers and Plastics
02 engineering and technology
010402 general chemistry
01 natural sciences
Article
lcsh:QD241-441
chemistry.chemical_compound
lcsh:Organic chemistry
thin-film composite membranes
Thin-film composite membrane
pervaporation
polyamide
General Chemistry
021001 nanoscience & nanotechnology
Interfacial polymerization
0104 chemical sciences
Hildebrand solubility parameter
Isopentane
Membrane
interfacial polymerization
Chemical engineering
chemistry
Polyamide
Diethylenetriamine
organic solvent
Pervaporation
0210 nano-technology
Subjects
Details
- ISSN :
- 20734360
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....cf2bf34905655c79f92ce85b53182797