Spraying-induced in situ growth of CaCO 3 for the modification of membranes for oil/water separation

Here, a simple spraying-induced in situ growth of inorganic particles strategy was adopted to fabricate composite membranes. Sodium alginate was first sprayed on a polyvinylidene fluoride membrane to provide active sites, and subsequently, alternate spraying of Ca 2+ and CO 3 2− induced in situ grow...

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Bibliographic Details
Published in:New journal of chemistry 2024-02, Vol.48 (9), p.3785-3788
Main Authors: Cui, Jiuyun, Rui, Jiangping, Meng, Jiawei, Wang, Fan, Feng, Huiqing, Ge, Zhijun, Xie, Atian, Pan, Jianming
Format: Article
Language:English
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Summary:Here, a simple spraying-induced in situ growth of inorganic particles strategy was adopted to fabricate composite membranes. Sodium alginate was first sprayed on a polyvinylidene fluoride membrane to provide active sites, and subsequently, alternate spraying of Ca 2+ and CO 3 2− induced in situ growth of CaCO 3 particles to construct hierarchical structures. The optimal membrane exhibited superhydrophilicity/underwater superoleophobicity. The membrane has good oil–water separation efficiency (>99%) and high flux (>2238 L m −2 h −1 ) for several oil–water emulsions. Importantly, the membrane retained acceptable separation performance even after 10 cycles, proving its good mechanical stability and anti-fouling features. The current work may open up a new avenue for the large-scale fabrication of super-wetting membranes for oily wastewater remediation.
ISSN:1144-0546
1369-9261
DOI:10.1039/D4NJ00008K