Study of SiO2 coating and carboxylic surface-modification on Mg-based inorganic fiber by one-step reflux reaction

Minsol Park, Areum Choi, Seiki Kim, Wooyoung Shim, Yoo Jin Kim

Research output: Contribution to journalArticlepeer-review


Magnesium hydroxide sulfate hydrate (5 Mg(OH)2·MgSO4·3H2O abbreviated 513MHSH) whiskers using for fiber reinforcements and fillers are synthesized via a reflux reaction by using MgO and H2SO4 as reactants. In general, the 513MHSH whiskers have hydrophilic surface and heat resistant property with crystal water molecules. In this work, surface modification and SiO2 coating technique were employed for various application by coating with organic and silica layer on 513MHSH whisker surface. Also, SiO2 coating system is important for preventing aggregation and enhancing thermal stability [J Kor Ceram Soc 55:618, 2018; J Nanosci Nanotechnol 10:380, 2010]. Controlling pH value acts as important factor for establish one-step process that synthesis and surface modification/SiO2 coating process simultaneously to improve the efficiency in terms of the time and process. The morphology and phase of synthesized 513MHSH whiskers are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Surface modified whiskers were characterized by Fourier transform infrared spectroscopy (FTIR) and the thermal stability of SiO2 coated whiskers were evaluated by thermogravimetric analysis (TGA).

Original languageEnglish
Pages (from-to)869-875
Number of pages7
JournalJournal of the Korean Ceramic Society
Issue number6
Publication statusPublished - 2022 Nov

Bibliographical note

Funding Information:
This work was supported by a grant from “A pilot project for domestic production of magnesium based ceramic raw material” (20016812) funded by the Ministry of Trade, Industry and Energy (MOTIE), Republic of Korea.

Publisher Copyright:
© 2022, The Korean Ceramic Society.

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites


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