Inorganic Chemicals Industry >

2025 , Vol. 57 >Issue 11: 52 - 58

DOI: https://doi.org/10.19964/j.issn.1006-4990.2024-0629

Research & Development

Study on preparation of nanoscale magnesium hydroxide regulated by ionic liquids in microchannels

  • LUO Peiyao ,
  • LI Xinqi ,
  • BU Zhaoshuang ,
  • GAO Xi ,
  • ZHOU Yicheng ,
  • SHEN Chunyu ,
  • LI Cuili ,
  • WANG Baoming
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  • 1. College of Ecology and Environment，Zhengzhou University，Zhengzhou 450001，China
    2. College of Chemistry，Zhengzhou University，Zhengzhou 450001，China
    3. College of Chemical Engineering，Zhengzhou University，Zhengzhou 450001，China
    4. National Calcium Magnesium Phosphate Compound Fertilizer Technology Research and Promotion Center，Zhengzhou 450001，China
    5. Henan Provincial Collaborative Engineering Technology Research Center for Pollution Reduction and Carbon Reduction，Zhengzhou 450001，China

Received date: 2024-11-25

  Online published: 2025-03-13

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Abstract

Polymer materials are widely used，but their flammability poses safety concerns.Adding magnesium hydroxide flame retardants can enhance the flame retardancy of composite materials.This study was aimed to prepare nano-magnesium hydroxide with good dispersion，fine particle size and stable performance.Nano-magnesium hydroxide was prepared by using sodium hydroxide and magnesium sulfate as raw materials，with 1-butyl-3-methylimidazolium acrylate ionic liquid as a regulator in a microchannel reactor.The effects of ionic liquid addition amount，sodium-magnesium molar ratio，reaction temperature and injection rate on the particle size of magnesium hydroxide were investigated，and the products were characterized by laser particle size analyzer and other methods.The results showed that the optimal preparation process parameters were ionic liquid addition amount of 10 g/mol，sodium-magnesium molar ratio of 2.5，reaction temperature of 50 ℃，and injection rate of 5.000 mL/min.Under these conditions，the average particle size of the product was 50 nm，and the microscopic morphology was hexagonal plate-like crystals with strong structure and thermal stability.The research confirmed that the synergy of ionic liquid and microchannel reactor could effectively control the crystal structure，morphology，particle size distribution and thermal stability of magnesium hydroxide.The nano-magnesium hydroxide prepared in this study showed better performance than traditional processes and commercial products，and had great application potential in polymer flame retardancy and other fields.

Key words： nanoscale magnesium hydroxide; microchannel reactor; ionic liquid; synergistic effect

Cite this article

LUO Peiyao , LI Xinqi , BU Zhaoshuang , GAO Xi , ZHOU Yicheng , SHEN Chunyu , LI Cuili , WANG Baoming . Study on preparation of nanoscale magnesium hydroxide regulated by ionic liquids in microchannels[J]. Inorganic Chemicals Industry, 2025 , 57(11) : 52 -58 . DOI: 10.19964/j.issn.1006-4990.2024-0629

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