A preparation method of nano-magnesia and a nano-magnesia-nanofiber composite felt as well as its preparation method and application

A nano-magnesium oxide and nano-fiber technology is applied in the field of decontamination, which can solve the problems of easy aggregation and inconvenience in use, and achieve the effects of solving inconvenient use, convenient use and avoiding easy agglomeration.

Active Publication Date: 2020-09-22
INST OF MEDICAL SUPPORT TECH OF ACAD OF SYST ENG OF ACAD OF MILITARY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the smaller the nano-magnesium oxide particles, the easier it is to aggregate, and there are certain inconveniences in use.

Method used

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  • A preparation method of nano-magnesia and a nano-magnesia-nanofiber composite felt as well as its preparation method and application
  • A preparation method of nano-magnesia and a nano-magnesia-nanofiber composite felt as well as its preparation method and application
  • A preparation method of nano-magnesia and a nano-magnesia-nanofiber composite felt as well as its preparation method and application

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preparation example Construction

[0023] The invention provides a kind of preparation method of nano magnesium oxide, comprises the following steps:

[0024] (1) adding the sodium carbonate aqueous solution dropwise to the magnesium nitrate alcohol solution to obtain the sol;

[0025] (2) The sol obtained in the step (1) is subjected to standing aging, filtering, washing and drying in sequence to obtain a xerogel;

[0026] (3) Sintering the dry gel obtained in the step (2) to obtain nano magnesium oxide.

[0027] In the present invention, the sodium carbonate aqueous solution is added dropwise to the magnesium nitrate alcohol solution to obtain the sol.

[0028] In the present invention, the dropping temperature is preferably -10°C to 4°C, more preferably -8°C to 2°C, more preferably -6°C to 0°C, even more preferably -4°C to -2°C ℃. In the present invention, the sodium carbonate aqueous solution is preferably added dropwise to the magnesium nitrate alcohol solution at the above temperature, which is conduci...

Embodiment 1

[0078] 6.3g Mg(NO 3 ) 2 ·6H 2 O dissolved in 25 mL ethylene glycol, 1.3 g Na 2 CO 3 Dissolved in 12.5mL of water, after complete dissolution, the Na 2 CO 3 The solution was added dropwise to Mg(NO 3 ) 2 Ultrasound was carried out in the solution at the same time, and ultrasonication was continued for 10 minutes after the addition was completed. After the ultrasonication was completed, it was left to stand at room temperature for 5 hours, filtered and washed with water two to three times, and the obtained precipitate was vacuum-dried overnight, and then calcined in a mini box furnace: calcining temperature 310 ℃, the calcination time is 3 hours, and the sample is taken out after cooling down to obtain nano-magnesia.

[0079] Nylon-6 electrospun fiber membrane, dopamine, polyethyleneimine and trimethylolaminomethane are mixed to obtain a mixed material liquid, wherein nylon-6 electrospun fiber membrane, dopamine, polyethyleneimine and trimethylol The ratio of aminomethan...

Embodiment 2

[0082] 12.3g Mg(NO 3 ) 2 ·6H2 O dissolved in 25 mL ethylene glycol, 2.3 g Na 2 CO 3 Dissolved in 12.5mL of water, after complete dissolution, the Na 2 CO 3 The solution was added dropwise to Mg(NO 3 ) 2 Ultrasound was carried out in the solution at the same time, and ultrasonication was continued for 20 minutes after the addition was completed. After the ultrasonication was completed, it was left to stand at room temperature for 8 hours, filtered and washed with water two to three times, and the obtained precipitate was vacuum-dried overnight, and then calcined in a mini box furnace: calcination temperature 410 ℃, the calcination time is 2 hours, and the sample is taken out after cooling down to obtain nano-magnesia.

[0083] Nylon-6 electrospun fiber membrane, dopamine, polyethyleneimine and trimethylolaminomethane are mixed to obtain a mixed material liquid, wherein nylon-6 electrospun fiber membrane, dopamine, polyethyleneimine and trimethylol The ratio of aminometha...

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Abstract

The invention belongs to the field of decontamination and provides a preparation method of nanometer magnesium oxide, a nanometer magnesium oxide-nanofiber composite felt and a preparation method andapplication thereof. The preparation method provided by the invention can prepare nanometer magnesium oxide with small and uniform particle sizes and improves the nanometer magnesium oxide effect of degradation of paraoxon. The nanometer magnesium oxide-nanofiber composite felt comprises nanometer magnesium oxide and a nano-fiber film. The nanometer magnesium oxide is dispersed on the surface of the nano-fiber film and inside the nano-fiber film. The nano-fiber film is used as a base so that the nanometer magnesium oxide is fully dispersed on the base and is not agglomerated, the degradation performances of the nanometer magnesium oxide are retained and the nanometer magnesium oxide is easy to use.

Description

technical field [0001] The invention relates to the field of decontamination, in particular to a preparation method of nano-magnesia, a nano-magnesia-nanofiber composite felt, a preparation method and application thereof. Background technique [0002] Decontamination is a measure to disinfect and eliminate contamination of personnel, equipment, materials, fortifications, roads, etc. contaminated with toxic agents, biological warfare agents, and radioactive substances. Due to the ultra-fine particle size, large specific surface area, and special surface defect state, nano-magnesia still has a good oxidative degradation effect under non-illumination conditions, which in turn makes nano-magnesia have certain applications in the field of decontamination. prospect. The smaller the particles of nano-magnesia, the more unsaturated bonds, edges, angles, junction defects and ionized groups on the surface, and the stronger the degradation force with organic poisons. However, the sma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/02B82Y30/00C02F1/72D06M11/44D06M101/34C02F101/34C02F101/38C02F101/30
CPCB82Y30/00C01F5/02C01P2004/04C01P2004/64C02F1/72C02F2101/30C02F2101/34C02F2101/345C02F2101/38D06M11/44D06M2101/34
Inventor 林松魏晓慧
Owner INST OF MEDICAL SUPPORT TECH OF ACAD OF SYST ENG OF ACAD OF MILITARY SCI
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