Enhanced crystallinity of micrometer-sized magnesium hydroxide by alkali metal hydroxide treatment

Wonseok Hur; Yongju Lee; Yoo Jin Kim; Duk Young Jung

doi:10.1007/s43207-024-00467-w

Enhanced crystallinity of micrometer-sized magnesium hydroxide by alkali metal hydroxide treatment

Wonseok Hur, Yongju Lee, Yoo Jin Kim, Duk Young Jung

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Mg(OH)₂ with high chemical purity, enhanced crystallinity and anisotropic morphology is an important precursor in many application, especially in flame retardants. The platelet-shaped Mg(OH)₂ with a (001) surface is important for fire resistance applications of Mg(OH)₂-polymer composites. Mg(OH)₂ was separated from sea bittern and micrometer-scale Mg(OH)₂ polycrystals were successfully synthesized by a hydrothermal method at 180 °C. Surface treatment in aqueous solutions of alkali metal hydroxide before the hydrothermal step strongly influenced the crystal growth of Mg(OH)₂. The synthesized Mg(OH)₂ was characterized by X-ray diffraction, electron microscopy (SEM and TEM), particle size, and thermal analyses. The prepared Mg(OH)₂ particles showed a mean diameter of 1000 nm and thickness of 80 nm. The growth conditions of the micrometer-sized Mg(OH)₂ with high crystallinity were an alkali hydroxide solution of the concentration lower than 1.5 M for NaOH and lower than 0.5 M for LiOH, KOH and CsOH.

Original language	English
Article number	100810
Pages (from-to)	297-304
Number of pages	8
Journal	Journal of the Korean Ceramic Society
Volume	62
Issue number	2
DOIs	https://doi.org/10.1007/s43207-024-00467-w
State	Published - Mar 2025

Keywords

Alkaline hydroxide
Crystal growth
Hydrothermal
Magnesium hydroxide
Supersaturation

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title = "Enhanced crystallinity of micrometer-sized magnesium hydroxide by alkali metal hydroxide treatment",

abstract = "Mg(OH)2 with high chemical purity, enhanced crystallinity and anisotropic morphology is an important precursor in many application, especially in flame retardants. The platelet-shaped Mg(OH)2 with a (001) surface is important for fire resistance applications of Mg(OH)2-polymer composites. Mg(OH)2 was separated from sea bittern and micrometer-scale Mg(OH)2 polycrystals were successfully synthesized by a hydrothermal method at 180 °C. Surface treatment in aqueous solutions of alkali metal hydroxide before the hydrothermal step strongly influenced the crystal growth of Mg(OH)2. The synthesized Mg(OH)2 was characterized by X-ray diffraction, electron microscopy (SEM and TEM), particle size, and thermal analyses. The prepared Mg(OH)2 particles showed a mean diameter of 1000 nm and thickness of 80 nm. The growth conditions of the micrometer-sized Mg(OH)2 with high crystallinity were an alkali hydroxide solution of the concentration lower than 1.5 M for NaOH and lower than 0.5 M for LiOH, KOH and CsOH.",

keywords = "Alkaline hydroxide, Crystal growth, Hydrothermal, Magnesium hydroxide, Supersaturation",

author = "Wonseok Hur and Yongju Lee and Kim, \{Yoo Jin\} and Jung, \{Duk Young\}",

note = "Publisher Copyright: {\textcopyright} The Korean Ceramic Society 2024.",

year = "2025",

month = mar,

doi = "10.1007/s43207-024-00467-w",

language = "English",

volume = "62",

pages = "297--304",

journal = "Journal of the Korean Ceramic Society",

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TY - JOUR

T1 - Enhanced crystallinity of micrometer-sized magnesium hydroxide by alkali metal hydroxide treatment

AU - Hur, Wonseok

AU - Lee, Yongju

AU - Kim, Yoo Jin

AU - Jung, Duk Young

N1 - Publisher Copyright: © The Korean Ceramic Society 2024.

PY - 2025/3

Y1 - 2025/3

N2 - Mg(OH)2 with high chemical purity, enhanced crystallinity and anisotropic morphology is an important precursor in many application, especially in flame retardants. The platelet-shaped Mg(OH)2 with a (001) surface is important for fire resistance applications of Mg(OH)2-polymer composites. Mg(OH)2 was separated from sea bittern and micrometer-scale Mg(OH)2 polycrystals were successfully synthesized by a hydrothermal method at 180 °C. Surface treatment in aqueous solutions of alkali metal hydroxide before the hydrothermal step strongly influenced the crystal growth of Mg(OH)2. The synthesized Mg(OH)2 was characterized by X-ray diffraction, electron microscopy (SEM and TEM), particle size, and thermal analyses. The prepared Mg(OH)2 particles showed a mean diameter of 1000 nm and thickness of 80 nm. The growth conditions of the micrometer-sized Mg(OH)2 with high crystallinity were an alkali hydroxide solution of the concentration lower than 1.5 M for NaOH and lower than 0.5 M for LiOH, KOH and CsOH.

AB - Mg(OH)2 with high chemical purity, enhanced crystallinity and anisotropic morphology is an important precursor in many application, especially in flame retardants. The platelet-shaped Mg(OH)2 with a (001) surface is important for fire resistance applications of Mg(OH)2-polymer composites. Mg(OH)2 was separated from sea bittern and micrometer-scale Mg(OH)2 polycrystals were successfully synthesized by a hydrothermal method at 180 °C. Surface treatment in aqueous solutions of alkali metal hydroxide before the hydrothermal step strongly influenced the crystal growth of Mg(OH)2. The synthesized Mg(OH)2 was characterized by X-ray diffraction, electron microscopy (SEM and TEM), particle size, and thermal analyses. The prepared Mg(OH)2 particles showed a mean diameter of 1000 nm and thickness of 80 nm. The growth conditions of the micrometer-sized Mg(OH)2 with high crystallinity were an alkali hydroxide solution of the concentration lower than 1.5 M for NaOH and lower than 0.5 M for LiOH, KOH and CsOH.

KW - Alkaline hydroxide

KW - Crystal growth

KW - Hydrothermal

KW - Magnesium hydroxide

KW - Supersaturation

UR - https://www.scopus.com/pages/publications/105001075401

U2 - 10.1007/s43207-024-00467-w

DO - 10.1007/s43207-024-00467-w

M3 - Article

AN - SCOPUS:105001075401

SN - 1229-7801

VL - 62

SP - 297

EP - 304

JO - Journal of the Korean Ceramic Society

JF - Journal of the Korean Ceramic Society

IS - 2

M1 - 100810

ER -

Enhanced crystallinity of micrometer-sized magnesium hydroxide by alkali metal hydroxide treatment

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Keywords

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