Synthesis and characterization of superhydrophobic magnesium oxysulfate whiskers--颗粒学报PARTICUOLOGY

Yao, Z., Gong, L., Zhu, C., Lian, X., He, B., Tian, S., & Yu, B. (2023). Synthesis and characterization of superhydrophobic magnesium oxysulfate whiskers. Particuology, 78, 111-121. https://doi.org/10.1016/j.partic.2022.10.001

Synthesis and characterization of superhydrophobic magnesium oxysulfate whiskers

Zhenying Yao ^a, Lu Gong ^a, Chunmei Zhu ^a, Xin Lian ^a, Bai He ^a, Shenghui Tian ^b, Bo Yu ^a

a School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
b Provincial and Ministerial Co-Constructive of Collaborative Innovation Center for MSW Comprehensive Utilization, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China

10.1016/j.partic.2022.10.001

Volume 78, July 2023, Pages 111-121

Received 31 May 2022, Revised 23 August 2022, Accepted 1 October 2022, Available online 14 October 2022, Version of Record 2 January 2023.

E-mail: tianshenghui@live.cn; yub07@126.com

Highlights

Abstract

Superhydrophobic materials have attracted much attention for their special wettability. In this study, magnesium oxysulfate (MOS) whiskers were surface modified by vinyltrimethoxysilane (VTMS) and prepared as superhydrophobic materials, which are expected to be widely used in self-cleaning, corrosion prevention, and oil-water separation. The factors of silane concentration, hydrolysis time, reaction temperature, and reaction time were investigated. The superhydrophobic MOS whiskers were synthesized. SEM and XRD turned out that there were no apparent changes in the morphology and crystallization behavior of whiskers before and after modification, while the surface was uniformly coated with a layer of non-crystal material, and the surface of the whiskers employed a chemical bond Si–O–Mg covalently connected. The thermogravimetric analysis ultimately demonstrated that surface modification was beneficial to the improvement of the thermal stability of MOS whiskers. Superhydrophobic MOS whiskers showed good compatibility with organic solvents through oil-water separation experiments, and demonstrated excellent self-cleaning performance. The methodology for the surface treatment of MOS whiskers to prepare superhydrophobic whiskers in this work may be extended for other whiskers or fillers, which may be promising for the preparation of superhydrophobic materials.

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