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A kind of method for preparing magnesium hydroxide nano film by hydration of magnesium oxide

A magnesium oxide hydration and magnesium hydroxide technology, applied in the direction of magnesium hydroxide, can solve the problems of low investment, limited industrial production, long reaction time, etc., achieve broad development prospects, realize large-scale industrial production, and low cost

Active Publication Date: 2019-04-23
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the deposition method has low investment, low preparation cost, energy saving and environmental protection, but the reaction time is too long
And when the reaction time is longer, the shape of the product is easy to change from a two-dimensional compact structure to a three-dimensional flower-like structure, which greatly limits its industrial production.

Method used

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  • A kind of method for preparing magnesium hydroxide nano film by hydration of magnesium oxide
  • A kind of method for preparing magnesium hydroxide nano film by hydration of magnesium oxide
  • A kind of method for preparing magnesium hydroxide nano film by hydration of magnesium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take Δn Cl - Put 2g of 10mol / kg active magnesium oxide into a beaker, add 20ml of ethanol, put it in an ultrasonic cleaning machine with ultrasonic frequency and power set to 20kHz and 50w respectively, and carry out dispersion treatment for 10min. Magnesium suspension was added dropwise to 150ml distilled water at a rate of 3ml / min for hydration reaction for 1h, and 10ml of triethanolamine solution with a concentration of 10wt% was added at one time while the magnesium oxide suspension was started to be added dropwise, and the hydration process continued High-shear emulsification and stirring, the stirring rate is set to 2000r / min, after the hydration reaction, suction filtration, washing, filtration, and finally drying at 105 ° C for 5 hours to obtain a uniformly distributed, high-transparency single-layer nano-scale magnesium hydroxide film . The SEM photos and XRD patterns of the product are as follows figure 1 and figure 2 shown.

Embodiment 2

[0032] Take Δn Cl -Put 2 g of 15 mol / kg active magnesium oxide into a beaker, add 10 ml of ethanol, put it in an ultrasonic cleaning machine with ultrasonic frequency and power set to 28 kHz and 100 w, respectively, and carry out dispersion treatment for 15 min. Magnesium suspension was added dropwise to 200ml distilled water at a rate of 2ml / min for hydration reaction for 1.5h, and at the 5th minute of reaction, 5ml of ethylene glycol solution with a concentration of 8wt% was added at a rate of 1ml / min, and the hydration continued Ultrasonic treatment, the frequency and power of ultrasonic waves are set to 40kHz and 100w respectively. After the hydration reaction is completed, suction filtration, washing, filtration, and finally drying at 105°C for 5 hours to obtain uniformly distributed, high-transparency single-layer nano-scale magnesium hydroxide film. The SEM photos and XRD patterns of the product are as follows image 3 and Figure 4 shown.

Embodiment 3

[0034] Take Δn Cl - Put 2g of 25mol / kg active magnesium oxide into a beaker, add 10ml of isopropanol, put it in an ultrasonic cleaning machine with ultrasonic frequency and power set to 40kHz and 50w respectively, and carry out dispersion treatment for 10min. The magnesia suspension was added dropwise to 200ml distilled water at a rate of 1ml / min for hydration reaction for 2h, and at the 10th minute of reaction, 8ml of monoethanolamine solution with a concentration of 10wt% was added at a rate of 3ml / min, and the hydration was carried out High-shear emulsification and stirring, the stirring rate is set to 3000r / min, after the hydration reaction is completed, suction filtration, washing, filtration, and finally drying at 105°C for 5 hours to obtain a uniformly distributed, high-transparency single-layer nano-scale magnesium hydroxide film . The SEM photos and XRD patterns of the product are as follows Figure 5 and Figure 6 shown.

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Abstract

The invention discloses a method for preparing a magnesium hydroxide nanometer thin film by hydration of magnesium oxide and belongs to the technical field of preparation of inorganic materials. The method comprises adding an organic solvent into active magnesium oxide as a raw material to obtain a magnesium oxide organic suspension, adding the magnesium oxide organic suspension into distilled water, carrying out hydration for 0.5-3h, wherein a crystal form control agent is used in the hydration process, carrying out suction filtration, washing and drying to obtain a single-layer nanometer magnesium hydroxide thin film with distribution uniformity and high transparency. The method is carried out under mild conditions, has simple processes and is environmentally friendly. The product can beformed on surfaces of different base materials. The nanometer magnesium hydroxide thin film has distribution uniformity and high transparency and can be used in industrial fields of production of solar cells, composite films, high-performance inorganic molecular sieve films, flame retardant additives and food preservatives, processing of magnetic materials and heavy metal removers.

Description

technical field [0001] The invention relates to a method for preparing magnesium hydroxide nano film by hydration of magnesium oxide, which belongs to the technical field of inorganic material preparation. Background technique [0002] Magnesium hydroxide film has the triple performance of filling, flame retardant and smoke control, it can be used as an inorganic additive flame retardant, and it is also an important precursor for preparing nano-magnesium oxide film. It has a large specific surface area, high activity, and strong adsorption capacity. It can be used as an acid-base neutralizer, flue gas desulfurizer, and heavy metal remover to absorb and remove Ni that is harmful to the environment from different industrial waste liquids. 2+ 、Co 2+ 、Cr 3+ and other heavy metal ions. [0003] Magnesium hydroxide film not only has the above-mentioned traditional industrial uses, but also can be applied in high-tech fields. Magnesium hydroxide thin film can be used to make dy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/14
CPCC01F5/14C01P2002/72C01P2004/03
Inventor 白丽梅赵文青马玉新李萌王东
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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