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Support membrane pore blockage (SMPB): An important phenomenon during the fabrication of thin film composite membrane via interfacial polymerization
- Source :
- Separation and Purification Technology. 215:670-680
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Interfacial polymerization (IP) has become a dominant technique for preparing thin film composite (TFC) membranes. Deep insight into the IP process is crucial for the design of TFC membranes with optimal performance. According to the conventional mechanism, a PA layer would be formed upon a support membrane during the IP reaction. In order to replenish this mechanism, a phenomenon denoted as “support membrane pore blockage (SMPB)” is explored in this study. Different experiments were designed to show how SMPB affected the membrane performance by regulating the monomer concentration, the pore size of the support membrane, the lag time after aqueous phase coating, and using different IP techniques. Various conceptual models were proposed to expound SMPB. The results indicated that the penetration of polyamide polymer into the support membrane may lead to a dual effect: (i) excessive penetration can cause support membrane pore blockage, and therefore increase the flow resistance and decrease the water permeability; (ii) it can produce a “mechanical interlocking effect”, which can enhance the adhesion between the PA layer and the support membrane, thus improving the TFC membrane stability. The SMPB mechanism can be adopted to elucidate phenomena related to membrane synthesis and to understand the structure-property-performance relationship.
- Subjects :
- chemistry.chemical_classification
Materials science
Filtration and Separation
02 engineering and technology
Penetration (firestop)
Polymer
engineering.material
021001 nanoscience & nanotechnology
Interfacial polymerization
Analytical Chemistry
chemistry.chemical_compound
Monomer
Membrane
020401 chemical engineering
Coating
Chemical engineering
chemistry
Thin-film composite membrane
Polyamide
engineering
0204 chemical engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 13835866
- Volume :
- 215
- Database :
- OpenAIRE
- Journal :
- Separation and Purification Technology
- Accession number :
- edsair.doi...........cc816d95840994c5021f7a5600036290