期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 21, 页码 24806-24819出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c05075
关键词
forward osmosis; textured polyamide nanostructures; protein-polyphenol nanoaggregates; nanoporous interlayer; solvent recovery; anti-biofouling
资金
- National Natural Science Foundation of China [21777105]
- Natural Science Foundation of Guangdong Province [2022A1515011772]
- Shenzhen Science and Technology Foundation [JCYJ20210324095409026, JCYJ20180507182040308]
This research demonstrates the fabrication of a modular nanochannel-integrated polyamide network on a nanoporous interlayer membrane using Mxene-reinforced protein-polyphenol nanoaggregates. The study found that the confined growth of the polyamide matrix in the hydrophilic nanochannels stiffened the interfacial channels and formed a polyamide layer with unique 3D crumpled globule-like nanostructures. The morphology of the membrane increased the filtration area and facilitated the nanofluidic transport of water molecules, leading to enhanced water flux.
Surface modulation of polyamide structures and the development of nanochanneled membranes with excellent water transport properties are crucial for the separation performance enhancement of thin-film composite membranes. Here, we demonstrate the fabrication of a modular nanochannel-integrated polyamide network on a nanoporous interlayer membrane comprising Mxene-reinforced protein-polyphenol nanoaggregates. The research indicates that the confined growth of the polyamide matrix inside this hydrophilic sub-10 nm nanochannel nanoporous intermediate layer stiffened the interfacial channels, leading to the formation of a polyamide layer with a spatial distribution of a network of unique 3D crumpled globule-like nanostructures. The high specific surface area of such a morphology bestowed the membrane with increased filtration area while facilitating the nanofluidic transport of water molecules through the nanochanneled membrane structure, leading to enhanced water flux of up to 26.6 L m(-2) h(-1) (active layer facing the feed solution) and 41.0 L m(-2) h(-1) (active layer facing the draw solution) using 1.0 M NaCl as the draw solution. The membrane equally exhibited good treatment for organic solvent forward osmosis filtration and typical seawater desalination. Moreover, the hierarchical nanostructures induced antimicrobial activity by effectively reducing the biofilm formation of Gram-negative Escherichia coli bacteria. This work provides significant insights into the interfacial engineering and compatibility of the nanomaterials and the polymers in interlayer mixed-matrix membranes, which are environmentally sustainable and cost-effective for the fabrication of advanced forward osmosis membranes for water purification and osmotic energy applications.
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