Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 13, Pages 12871-12879Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b01237
Keywords
in situ assembly; zeolite imidazolate framework nanocrystal; Noria-polyethyleneimine codeposition; reverse osmosis membrane; desalination
Funding
- Shandong Province Major Science and Technology Innovation Project [2018CXGC1002]
- Qingdao Science and Technology Plan Project [176319gxx]
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Zeolite imidazolate framework-8 (ZIF-8) has emerged as an excellent candidate for the preparation of thin-film nanocomposite (TFN) membranes. Nevertheless, it still remains a great challenge to make the effective incorporation of ZIF-8 into the resulting TFN membrane feasible for facile application. Herein, we propose an in situ strategy to fabricate a ZIF-8 nanocrystal hybrid reverse osmosis membrane induced by the ultrafast surface modification of Noria-polyethyleneimine codeposition. By this method, ZIF-8 nanocubes with monodispersity were first formed on a modified support through the step-by-step deposition of precursor solutions. Afterward, a TFN membrane was fabricated by interfacial polymerization (IP) on a ZIF-8 loaded support. Due to the significantly altered IP process induced by the coexistence of Noria and ZIF-8 on the support surface, the TFN membrane depicts a distinct nanostrand-nanoparticle hybrid morphology, which endows the TFN membrane with excellent antifouling ability. Moreover, the permeance of the as-fabricated TFN membrane is up to 3.64 Lin-2-h-1-bar-', nearly 2.7-fold higher than that of the nascent membrane, while it still maintains a high rejection toward NaCl. The in situ assembly strategy reported here could also pave a promising way for the fabrication of TFN membranes with other nanomaterials in future.
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