High-performance asymmetric isoporous nanocomposite membranes with chemically-tailored amphiphilic nanochannels
| Autor: | Md. Mushfequr Rahman, Volker Abetz, Clarissa Abetz, Zhenzhen Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanocomposite Renewable Energy Sustainability and the Environment Ultrafiltration 02 engineering and technology General Chemistry Permeance Permeation 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Nanopore Membrane Chemical engineering Amphiphile General Materials Science Nanofiltration 0210 nano-technology ddc:620.11 |
| Zdroj: | Zhang, Z.; Rahman, M.; Abetz, C.; Abetz, V.: High-performance asymmetric isoporous nanocomposite membranes with chemically-tailored amphiphilic nanochannels. In: Journal of Materials Chemistry A. Vol. 8 (2020) 9554-9566 . (DOI: /10.1039/d0ta01023e) |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/d0ta01023e |
| Popis: | Tailoring the well-defined nanochannels of ultrafiltration membranes from self-assembled block copolymers (BCPs) toward the nanofiltration regime can expand their potential applications in the fractionation or separation of small molecules. One big issue is to fabricate a nanofiltration membrane with high permeance, good selectivity and excellent fouling resistance. Here such a membrane is presented using a tailor-made diblock copolymer composed of a hydrophobic major block and an amphiphilic minor block. A scalable integral asymmetric isoporous membrane is fabricated by the solvent evaporation induced co-assembly of BCP and in situ formed inorganic titanium dioxide nanoparticles combined with nonsolvent induced phase separation. The membrane nanopores are readily post-functionalized using negatively charged moieties by straightforward in situ gas–solid reactions. The potential to use the post-functionalized membrane for separation of small organic molecules having 1–2 nm lateral dimensions (having molecular weights in the range of 300–1500 g mol−1) is demonstrated. The negatively charged membrane displays high flux, excellent antifouling properties with a low permeation flux decline and nearly complete flux recovery. This type of membrane is a promising candidate for a new generation of nanofiltration membranes. |
| Databáze: | OpenAIRE |
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