Robust, fluorine-free and superhydrophobic composite melamine sponge modified with dual silanized SiO2 microspheres for oil-water separation

doi:10.1016/j.cjche.2020.06.006

Chinese Journal of Chemical Engineering ›› 2021, Vol. 33 ›› Issue (5): 50-60.DOI: 10.1016/j.cjche.2020.06.006

• Separation Science and Engineering • Previous Articles Next Articles

Robust, fluorine-free and superhydrophobic composite melamine sponge modified with dual silanized SiO₂ microspheres for oil-water separation

Ruilong Zhang¹, Zhiping Zhou¹, Wenna Ge^2,3, Yi Lu⁴, Tianshu Liu⁴, Wenming Yang¹, Jiangdong Dai²

1 School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2 Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China;
3 School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China;
4 Entry-Exit Inspection Quarantine Bureau, Zhenjiang 212008, China

Received:2020-04-09 Revised:2020-05-26 Online:2021-08-19 Published:2021-05-28
Contact: Zhiping Zhou, Jiangdong Dai
Supported by:
This work was supported by the National Natural Science Foundation of China (No. 21676127), Natural Science Foundation of Jiangsu Province (BK20170532), China Postdoctoral Science Foundation (2017M620194), Jiangsu Planned Projects for Postdoctoral Research Funds (1701023A), Natural Science Foundation Jiangsu Higher Education Institutions (17KJB430011), Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX19_1592), Zhenjiang Natural Science Foundation of China (Grant Nos. SH₂017046, SH₂017055).

Robust, fluorine-free and superhydrophobic composite melamine sponge modified with dual silanized SiO₂ microspheres for oil-water separation

Ruilong Zhang¹, Zhiping Zhou¹, Wenna Ge^2,3, Yi Lu⁴, Tianshu Liu⁴, Wenming Yang¹, Jiangdong Dai²

1 School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2 Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China;
3 School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China;
4 Entry-Exit Inspection Quarantine Bureau, Zhenjiang 212008, China

通讯作者: Zhiping Zhou, Jiangdong Dai
基金资助:
This work was supported by the National Natural Science Foundation of China (No. 21676127), Natural Science Foundation of Jiangsu Province (BK20170532), China Postdoctoral Science Foundation (2017M620194), Jiangsu Planned Projects for Postdoctoral Research Funds (1701023A), Natural Science Foundation Jiangsu Higher Education Institutions (17KJB430011), Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX19_1592), Zhenjiang Natural Science Foundation of China (Grant Nos. SH₂017046, SH₂017055).

Abstract

Abstract: Massive oily wastewater discharged from industrial production and human daily life have been an urgent environmental and ecological challenge. Superhydrophobic materials have attracted tremendous attention due to their unique properties and potential applications in the treatment of wastewater. In this study, a novel superhydrophobic/superoleophilic composite melamine sponge modified with dual silanized SiO₂ microspheres was fabricated simply by a two-step sol-gel method using vinyltriethoxysilane and hexadecyltrimethoxysilane as functional agent, which exhibited a water contact angle of 153.2° and a water sliding contact angle of 4.8°. Furthermore, the composite sponge showed the excellent oil adsorption performance and the compressive elasticity reaching up to 130 g·g^-1 of dichloromethane and 33.1 kPa of compressive stress. It was worth noting that the composite sponge presented the excellent separation efficiency (up to 99.5%) in the processes of continuous oil/water separation. The robust superhydrophobic composite melamine sponge provided the possibility with the practical application for oil-water separation.

Key words: Superhydrophobic sponge, Two-step sol-gel method, Oil-water separation, Dual silanized SiO₂ microspheres

摘要： Massive oily wastewater discharged from industrial production and human daily life have been an urgent environmental and ecological challenge. Superhydrophobic materials have attracted tremendous attention due to their unique properties and potential applications in the treatment of wastewater. In this study, a novel superhydrophobic/superoleophilic composite melamine sponge modified with dual silanized SiO₂ microspheres was fabricated simply by a two-step sol-gel method using vinyltriethoxysilane and hexadecyltrimethoxysilane as functional agent, which exhibited a water contact angle of 153.2° and a water sliding contact angle of 4.8°. Furthermore, the composite sponge showed the excellent oil adsorption performance and the compressive elasticity reaching up to 130 g·g^-1 of dichloromethane and 33.1 kPa of compressive stress. It was worth noting that the composite sponge presented the excellent separation efficiency (up to 99.5%) in the processes of continuous oil/water separation. The robust superhydrophobic composite melamine sponge provided the possibility with the practical application for oil-water separation.

关键词: Superhydrophobic sponge, Two-step sol-gel method, Oil-water separation, Dual silanized SiO₂ microspheres

Ruilong Zhang, Zhiping Zhou, Wenna Ge, Yi Lu, Tianshu Liu, Wenming Yang, Jiangdong Dai. Robust, fluorine-free and superhydrophobic composite melamine sponge modified with dual silanized SiO₂ microspheres for oil-water separation[J]. Chinese Journal of Chemical Engineering, 2021, 33(5): 50-60.

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Robust, fluorine-free and superhydrophobic composite melamine sponge modified with dual silanized SiO₂ microspheres for oil-water separation

Robust, fluorine-free and superhydrophobic composite melamine sponge modified with dual silanized SiO₂ microspheres for oil-water separation

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