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    One-step facile fabrication of sustainable cellulose membrane with superhydrophobicity via a sol-gel strategy for efficient oil/water separation

    Year: 2019

    Journal: Surf. Coat. Technol., Volume 361, Nov-15, page 19–26

    Authors: Xie, Atian; Cui, Jiuyun; Chen, Yangyang; Lang, Jihui; Li, Chunxiang; Yan, Yongsheng; Dai, Jiangdong

    Organizations: National Natural Science Foundation of China [21776110, 51608226]; Natural Science Foundation of Jiangsu Province [BK20170532, BK20160501]

    Keywords: Sol-gel method; Superhydrophobic; Cellulose membrane; Hierarchical structures; Oil/water separation

    With the rapid development of petrochemical industry, oily wastewater pose a serious threat to environment and human safety. Recently, superhydrophobic and superoleophilic materials have received considerable interest due to their high selective oil/water separation. Nevertheless, facile fabrication, stability, ecofriendly, sustainable and low cost materials are still a great challenge. Here, a sustainable superhydrophobic cellulose membrane (SOCM) is prepared via one-step facile sol-gel strategy for efficient oil/water separation. The superhydrophobicity is endowed with cellulose membrane (CM) by one-step micro/nano hierarchical structures construction and low-surface-energy chemical modification from tetraethyl orthosilicate (TEOS) and hexadecyltrimethoxysilane (HDTMS) hydrolysis and polycondensation. The SOCM shows high separation efficiencies (above 98%) for various oil/water mixtures. Importantly, the SOCM displays well environmental (acid, alkali and salt-resistance) and mechanical durability (tape peeling and scratch-resistance) and remarkable reusability (at least 10 times). The merits of facile fabrication, stability, ecofriendly, sustainable and low cost make SOCM a promising candidate material for large-scale application in oil/water separation.
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