Performance evaluation of nanofiltration polyamide membranes based from 3,3′-diaminobenzidine
| Autor: | Hui-An Tsai, Yan-Li Ji, Kueir-Rarn Lee, Manuel Reyes De Guzman, Chien-Chieh Hu, Juin-Yih Lai, Micah Belle Marie Yap Ang, Sheng-Ju Tsai, Jing-Yan Lu, Shu-Hsien Huang |
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| Rok vydání: | 2019 |
| Předmět: |
Scanning electron microscope
Filtration and Separation 02 engineering and technology 021001 nanoscience & nanotechnology Chloride Interfacial polymerization Analytical Chemistry chemistry.chemical_compound Membrane 020401 chemical engineering chemistry Polymerization Polyamide medicine Polysulfone Nanofiltration 0204 chemical engineering 0210 nano-technology medicine.drug Nuclear chemistry |
| Zdroj: | Separation and Purification Technology. 211:170-178 |
| ISSN: | 1383-5866 |
| Popis: | Our present study used 3,3′-diaminobenzidine (DAB) to prepare nanofiltration polyamide membranes. A polyamide layer was formed on a polysulfone (PSf) support through interfacial polymerization; DAB was reacted with different polyacyl chlorides: isophthaloyl chloride, succinyl chloride, and trimesoyl chloride (TMC). Attenuated total reflectance-Fourier transform infrared confirmed the polyamide layer formation. Scanning electron microscopy illustrated that only the reaction between DAB and TMC yielded a defect-free polyamide layer. The membrane preparation conditions comprised the following parameters: DAB and TMC concentrations, immersion time (PSf support in DAB solution), and polymerization reaction time. The optimized membrane delivered an average permeability of 12.5 L m−2 h−1 MPa−1. Its salt rejection followed this order: Na2SO4 (84.2%) > MgSO4 (48.8%) > MgCl2 (14.5%) or NaCl (15.3%). Moreover, the membrane was stable at feed pH of 5–10, at operating temperatures of 25–70 °C, and within a long-term nanofiltration period of 148 h. |
| Databáze: | OpenAIRE |
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