期刊
JOURNAL OF MEMBRANE SCIENCE
卷 622, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2020.119045
关键词
Thin-film nanocomposite membranes; Nanofiltration; Nanosized zeolite; Spray dispersion
资金
- Thousand Talents Program for Foreign Experts [WQ20152100284]
- National Natural Science Foundation of China [U1862118, 21501198, 21601205, 21771193]
- Taishan Scholar Foundation [ts201511019]
- Fundamental Research Funds for the Central Universities [18CX02047A, 18CX07001A, 18CX05018A, 20CX05010A]
- PetroChina Innovation Foundation [2019D-5007-0411]
- Key Research and Development Projects of Shandong Province [2019JZZY010331]
This study demonstrated the improvement of dye nanofiltration membrane performance by embedding ultra-small EMT zeolite nanocrystals into thin-film composite membranes. The developed high-quality TFN membranes containing zeolite nanocrystals showed great potential for dye separation applications.
Thin-film composite (TFC) membranes show great potential in dye nanofiltration but their performance still required further improvement. In this work, ultra-small EMT zeolite nanocrystals were embedded into the interfacial polymerized polyamide (PA) layer supported on porous nylon via spray dispersion method and used in dye separation. Ultra-small nanosized EMT zeolite crystals with plate-like morphology were synthesized from organic-free precursor suspensions at ambient conditions (30 degrees C). The plate-like EMT nanocrystals were homogeneously dispersed in the thin-film nanocomposite (TFN) membranes, mitigating the formation of agglomerates during the interfacial polymerization. The TFN membrane prepared with 0.05 w/v % EMT nanocrystals had a water permeance up to 24.37 L m(-2) h(-1) bar(-1), which is nearly 6 times higher than the pristine PA TFC membrane, and maintain the dye rejection (crystal violet) of 99.98 %. A new method for preparation of high quality TFN membranes containing zeolite nanocrystals was developed. The potential use of the TFN membranes with the ultra-small zeolite crystals for dye nanofiltration was demonstrated.
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