Merits of using cellulose triacetate as a substrate in producing thin-film composite nanofiltration polyamide membranes with ultra-high performance
| Autor: | Juin-Yih Lai, Kueir-Rarn Lee, Hui-An Tsai, Jazmine Aiya D. Marquez, Wei-Song Hung, Micah Belle Marie Yap Ang, Chien-Chieh Hu, Zheng-Yen Luo, Shu-Hsien Huang |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Interfacial polymerization 0104 chemical sciences chemistry.chemical_compound Cellulose triacetate Membrane Monomer chemistry Chemical engineering Thin-film composite membrane Polyamide Nanofiltration Polysulfone 0210 nano-technology |
| Zdroj: | Journal of the Taiwan Institute of Chemical Engineers. 112:251-258 |
| ISSN: | 1876-1070 |
| Popis: | Choosing the property of the supporting membrane is crucial in preparing high performing nanofiltration membranes through interfacial polymerization. In this study, an oxygen rich membrane – cellulose triacetate (CTA) – was used to fabricate the support membrane. Polyamide was deposited onto the CTA support using interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC). The concentration of the monomers was optimized. Furthermore, the polyamide layer prepared on CTA support exhibited higher separation efficiency for sodium sulfates and dyes compared to using traditional polysulfone (PSf) support. The oxygen groups of CTA facilitate better adsorption of amines on the surface; thus, using low concentration of PIP could still provide a defect-free polyamide layer. Utilizing the optimum condition, the polyamide/CTA membrane delivered a high pure water flux (operating at 6 bar) of 179.5 L/m2h with the following rejections: Na2SO4 = 98.4%; MgSO4 = 60.3%; MgCl2 = 15.0%; NaCl = 3.7%; Rose Bengal = 95.5%; Brilliant Blue R = 99.9%; Amido Black 10B = 90.6%; Orange G = 67.3%. Moreover, the polyamide/CTA membrane had excellent stability at a wide range operating conditions. |
| Databáze: | OpenAIRE |
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