Promoted water transport across graphene oxide-poly(amide) thin film composite membranes and their antibacterial activity
By L. He, L. Dumée, Chunfang Feng, L. Velleman, Rackel Reis, Fenghua She, Weimin Gao, L. Kong. 2015
175 citations recorded by the source corpus.
Abstract Hybrid composite membranes have great potential for desalination applications since water transport can be favorably promoted by selective diffusion at the interface between matrix and reinforcement materials. In this paper, graphene oxide nano-sheets were successfully incorporated across 200 nm thick poly(amide) films by interfacial polymerization to form novel thin-film composite membranes. The impact of the graphene oxide on the morphology, chemistry, and surface charge of the ultra-thin poly(amide) layer, and the ability to desalinate seawater was investigated. The graphene oxide nano-sheets were found to be well dispersed across the composite membranes, leading to a lower membrane surface energy and an enhanced hydrophilicity. The iso-electric point of the samples, key to surface charge repulsion during desalination, was found to be consistently shifted to higher pH values with an increasing graphene oxide content. Compared to a pristine poly(amide) membrane, the pure water flux across the composite membranes with 0.12 wt.% of graphene oxide was also found to increase by up to 80% from 0.122 to 0.219 L·μm·m− 2·h− 1·bar− 1 without significantly affecting salt selectivity. Furthermore, the inhibitory effects of the composite membrane on microbial growth were evaluated and the novel composite membranes exhibited superior anti-microbial activity and may act as a potential anti-fouling membrane material.
Subfields: Biomedical Engineering, Materials Chemistry, Water Science and Technology
View Paper: https://www.semanticscholar.org/paper/da69c34dce186e88aac500dacd4a6e1ab252836f
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In Biomedical Engineering
In Materials Chemistry
In Water Science and Technology
Citations in the corpus
- A review of reverse osmosis membrane fouling and control strategies. (2017, methodology): “He et al (He et al., 2015) synthesized novel TFC membranes by incorporating graphene oxide nano-sheets into polyamide films through method of interfacial polymerization, which demonstrated excellent”
- Cutting edge development on graphene derivatives modified by liquid crystal and CdS/TiO2 hybrid matrix: optoelectronics and biotechnological aspects (2020, methodology): “The used polymers were chitosan,([456]) PVA,([457]) polyamide,([458]) polyethersulfone,([459]) polyester,([460]) and polypropylene([461]) which fixed by different methods”