期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 2, 页码 1753-1762出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b03102
关键词
Superhydrophilic nanofiber membrane; Co-cross-linked networks; Structural stability; Emulsion separation
资金
- National Natural Science Foundation of China [21474066, 51421061]
The structural stability and mechanical strength of hydrophilic polymer nanofiber (NF) membranes are relatively low, because of the creep effect of polymer chain when swelling in water for a long time, which lead to a poor reusability in the fields of water treatment. In this work, we demonstrated a facile and green strategy for preparing eco-friendly hydrophilic nanofibrous membranes with excellent reusability and recyclability that could separate oil-in-water emulsion in practical conditions by using bio-based chitin nanowhiskers (ChNWs) as reinforcement and co-crosslinking hub for hydrophilic nanofiber matrix. The as-prepared membranes exhibited very good separation performance, with a separation flux of 1100-1300 L m(-2) h(-1) and a separation efficiency of > 99.5%. The reusability and recyclability of the membranes were evaluated and had proved to be robust enough to effectively separate emulsions after recycling at least 5 times. Moreover, the NF membranes were capable of effectively separating oil-in-water emulsions not only for a wide range of pH but also under hypersaline conditions. This work, as well as co-cross-linked strategies, enrich the exploration of superhydrophilic nanofibrous membranes for its significant potential in the field of oil spills and industrial oily wastewater treatments.
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