期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 27, 页码 13191-13202出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta03673j
关键词
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资金
- National Natural Science Foundation of China [21621004, 21576189, 21490583]
- National Science Fund for Distinguished Young Scholars [21125627]
- National Key Research and Development Plan [2016YFB0600503, 2017YFB0603400]
The demand for fractionating organic molecules and salt ions via a membrane is increasing in various industries, but the sub-nanoscale difference in solute size makes it a critical challenge. Herein, amino-functionalized polyhedral oligomeric silsesquioxane (POSS) nanoparticles were employed as a molecular-level regulator to manipulate the nanopores of a polydopamine (PDA) membrane via a facile co-deposition process. By physical intercalation and chemical bonding of multifunctional POSS, increased nanoporosity was achieved within a narrow mean nanopore size range of 1.04-1.07 nm. The optimized POSS-PDA/PAN membrane exhibited desirable dye rejection (>90%) and salt permeation (>90%) with a high permeance of 1099 L m(-2) h(-1) MPa-1, which was 2-4 times higher than that of previously reported membranes with a similar dye rejection. Additionally, the rigid cage-like POSS nanoparticles cross-linked with the PDA membrane contributed to the reinforced alkali and compaction resistance. The synergy of mussel-inspired chemistry and multifunctional nanomaterials provided a novel strategy to engineer nanoporous membranes with a favorable physiochemical nanostructure for efficient and selective transport of both molecules and ions.
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