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Basic magnesium sulfate whisker with high length-diameter ratio and preparation method thereof

A magnesium sulfate whisker, high aspect ratio technology, applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve problems such as difficult to obtain highly dispersed one-dimensional whiskers at the same time

Active Publication Date: 2022-03-04
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that it is difficult to simultaneously obtain one-dimensional whiskers with high dispersion, high aspect ratio and uniform size in existing methods, the present invention provides a high aspect ratio Basic magnesium sulfate whisker and preparation method thereof

Method used

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  • Basic magnesium sulfate whisker with high length-diameter ratio and preparation method thereof
  • Basic magnesium sulfate whisker with high length-diameter ratio and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] This example discloses a high long diameter alkali sulfate sulfate whisker and its preparation method, including the following steps:

[0039]Step A: Weigh 30.495 g of magnesium chloride with magnesium chloride into 150 ml of concentration of 1 mol / L; 12G sodium hydroxide is weighed with a solution of a sodium hydroxide solution having a concentration of 2 mol / L; 0.0396 g of sodium ethylenediamine is dissolved in 300 ml of ethanol-aqueous solution, the concentration of magnesium sulfate is 5% by 5%.

[0040] Step B: The magnesium chloride solution was raised to 60 ° C, stirring the hydroxide solution with a 5 ml / min drop rate of 5 ml / min, and then held for 2 h, and a white magnesium hydroxide solution was formed.

[0041] Step C: Add a newly prepared magnesium hydroxide solution to a magnesium sulfate solution of ethylenediamine tetracetate, stir mixed and mixed and mixed into 1L high-pressure reactor, 190 ° C, heat, heat, then naturally cooling To room temperature....

Embodiment 2

[0044] This example discloses a high long diameter alkali sulfate sulfate whisker and its preparation method, including the following steps:

[0045] Step A: Weigh 30.495 g of magnesium chloride with magnesium chloride into 150 ml of concentration of 1 mol / L; 12G sodium hydroxide is weighed with a solution of a sodium hydroxide solution having a concentration of 2 mol / L; 0.0396 g of ethylenediamine tetracetate is dissolved in 300 mL of ethanol-aqueous solution, the concentration of magnesium sulfate is 0.5 mol / L, and the volume fraction of ethanol is 10%.

[0046] Step B: The magnesium chloride solution was raised to 60 ° C, stirring the hydroxide solution with a 5 ml / min drop rate of 5 ml / min, and then held for 2 h, and a white magnesium hydroxide solution was formed.

[0047] Step C: Add a newly prepared magnesium hydroxide solution to a magnesium sulfate solution of ethylenediamine tetracetate, stir mixed and mixed and mixed into 1L high-pressure reactor, 190 ° C, hea...

Embodiment 3

[0050] This example discloses a high long diameter alkali sulfate sulfate whisker and its preparation method, including the following steps:

[0051] Step A: Weigh 30.495 g of magnesium chloride with magnesium chloride into 150 ml of concentration of 1 mol / L; 12G sodium hydroxide is weighed with a solution of a sodium hydroxide solution having a concentration of 2 mol / L; , 0.0396 g of sodium ethylenediamine is dissolved in 300 mL of ethanol-aqueous solution, the concentration of magnesium sulfate is 0.5 mol / L, and the volume fraction of ethanol is 20%.

[0052] Step B: The magnesium chloride solution was raised to 60 ° C, stirring the hydroxide solution with a 5 ml / min drop rate of 5 ml / min, and then held for 2 h, and a white magnesium hydroxide solution was formed.

[0053] Step C: Add a newly prepared magnesium hydroxide solution to a magnesium sulfate solution of ethylenediamine tetracetate, stir mixed and mixed and mixed into 1L high-pressure reactor, 190 ° C, heat, ...

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Abstract

The invention belongs to the technical field of inorganic functional materials, and particularly discloses a high-length-diameter-ratio basic magnesium sulfate whisker and a preparation method thereof.The preparation method comprises the following steps that a sodium hydroxide solution is slowly dropwise added into a magnesium chloride solution, a sol-gel reaction is conducted at the constant temperature, and magnesium hydroxide sol is obtained; dissolving magnesium sulfate in an ethanol-water solution to prepare a magnesium sulfate alcohol-water solution; adding sodium ethylene diamine tetracetate into a magnesium sulfate alcohol-water solution, and stirring for dissolving; mixing the obtained magnesium hydroxide sol with a magnesium sulfate alcohol-water solution, and uniformly stirring to obtain a basic magnesium sulfate whisker precursor; and quickly transferring into a high-pressure reaction kettle, carrying out hydrothermal crystallization reaction, then cooling to room temperature, and carrying out suction filtration, washing and drying to obtain a basic magnesium sulfate whisker product. The basic magnesium sulfate whisker prepared by the method has the advantages of good crystallinity, high length-diameter ratio, good dispersity and the like, the yield of the whisker can reach 90%, the length can reach 500-1000 microns, the length-diameter ratio reaches 150-300 or above, and the basic magnesium sulfate whisker can be applied to various flame-retardant high polymer materials.

Description

Technical field [0001] The present invention belongs to the technical field of inorganic functional materials, and more particularly to a high long diameter ratio of basic sulfate sulfate sulfate whiskers and preparation methods thereof. Background technique [0002] Magnesium salt crystals are used as a new type of fiber material, which has excellent high temperature resistance, corrosion resistance, and good mechanical strength. It is often used in high molecular composite materials to increase their toughening and flame retardation, which can significantly improve its tensile strength and resistance. Bend strength, impact strength and flame retardant performance. The basic sulfate sulfate crystal must have a higher thermal decomposition temperature (260 ° C ~ 1150 ° C), which is better than flame retardant properties. However, when the hydrothermium is directly prepared by the magnesium sulfate crystal, there is more sector whiskers, and the long diameter is relatively low, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46C30B29/62C30B7/10C30B7/14C08K7/08
CPCC30B29/46C30B29/62C30B7/10C30B7/14C08K7/08C08K2201/004C08K2201/016Y02E60/10
Inventor 方莉张少博程文婷程芳琴
Owner SHANXI UNIV
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