The pyridine functionalized polyamide (PA-PY) membrane was prepared by interfacial polymerization using 2,6-diaminopyridine as aqueous monomers and trimesoyl chloride as organic phase monomers.Next,the carboxyl group and the pyridine nitrogen atom on the surface of the PA-PY membrane were used to coordinate with the zinc ion.ZIF-8 was grown in-situ on the surface of the membrane to prepare a ZIF-8/PY double-layer composite nanofiltration membrane.The results of SEM showed ZIF-8 layer with complete crystal structure could be generated by in-situ growth method on the surface of PA-PY membrane,and the ZIF-8 layer gradually thickened with the increase of in-situ growth time.ZIF-8/PA-PY double-layer membrane had higher rejection rate for negatively charged dyes.When the in-situ growth time was 12h,the membrane had a methyl blue rejection rate of 97.9% and congo red of 99.6%,respectively.
Zhang Shuo, Li Minghui, Wang Jinyun, Dong Liangliang, Bai Yunxiang, Zhang Chunfang
. In-situ growth of ZIF-8 in PY nanofiltration membrane with enhanced dye separation performance[J]. New Chemical Materials, 2021
, 49(2)
: 91
-95
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.02.021
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