Preparation of Superhydrophobic and Superoleophilic  Corn Straw Fibers Oil Absorbents and Application  to the Removal of Spilled Oil from Water

doi:10.11944/j.issn.1000-0518.2020.07.200030

Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (7): 793-802.DOI: 10.11944/j.issn.1000-0518.2020.07.200030

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Preparation of Superhydrophobic and Superoleophilic Corn Straw Fibers Oil Absorbents and Application to the Removal of Spilled Oil from Water

SHI Yanlong^*, FENG Xiaojuan, YANG Ruihua, WANG Jianrong

Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities,College of Chemistry and Chemical Engineering,Hexi University,Zhangye,Gansu 734000,China

Received:2020-01-23 Published:2020-07-01 Online:2020-07-07
Contact: SHI Yanlong, professor; Tel/Fax:0936-8282066; E-mail:yanlongshi726@126.com; Research Interests:functional materials
Supported by:
Supported by the National Natural Science Foundation of China(No.41761061), “Light of West China” Program of Chinese Academy of Sciences, the Scientific Research Foundation of the Higher Education Institutions of Gansu Province(No.2016B-091), the General Program of the Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities(No.XZ1603), and the Undergraduate Innovation and Entrepreneurship Training Program of Gansu Province(No.81)

Abstract

Abstract: Materials with both superhydrophobicity and superoleophilicity have attracted considerable attention due to the potential application in the removal of the spilled oil from water. In the past decades, numerous techniques have been adopted to construct superhydrophobic and superoleophilic materials, but it is still a great challenge to obtain this kind of material via a more facile, low cost and environmentally friendly method. Herein, corn straw fibers with superhydrophobicity and superoleophilicity were obtained by dip-coating TiO₂ sol and subsequent surface modification with octyltrimethoxysilane (OTS). The contact angle of water droplets and oil droplets on the as-prepared sample is 160?and 0? respectively. The results indicate that the superhydrophobicity is attributed to the joint effects of natural hierarchical structures with micro/nanometer scale of corn straw fibers and the chemical composition with low surface energy induced by the hydrophobic surface modification. With the characteristics of water repellency and selective oil adsorption, the as-prepared corn straw fibers could be chosen to remove the spilled oil from water with high separation efficiency, stable durability and recyclability. The method presented here is expected to be employed as a technique to prepare oil absorbent with superhydrophobicity and superoleophilicity, which may be used to treat the oily wastewater in practical application with the advantages of low cost, simple method and easy biodegradability as well as stable recyclability.

Key words: corn straw fibers, superhydrophobic, superoleophilic, TiO₂ sol, oil adsorption

SHI Yanlong, FENG Xiaojuan, YANG Ruihua, WANG Jianrong. Preparation of Superhydrophobic and Superoleophilic Corn Straw Fibers Oil Absorbents and Application to the Removal of Spilled Oil from Water[J]. Chinese Journal of Applied Chemistry, 2020, 37(7): 793-802.

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Preparation of Superhydrophobic and Superoleophilic Corn Straw Fibers Oil Absorbents and Application to the Removal of Spilled Oil from Water

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