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Sustained-release dust suppression microcapsule, and preparation method and application thereof

A microcapsule, slow-release technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as inability to capture coal dust and difficulty in achieving results

Active Publication Date: 2020-10-30
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) After the existing dust suppression technology is solidified into a film, it only prevents the dust covered by the solidified layer, and cannot continue to capture the new coal dust that is being produced during coal mining, storage, loading and unloading, and transportation. Difficult to achieve the desired effect
[0007] (2) At present, the slow-release microcapsules are technically blank in dust suppression

Method used

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  • Sustained-release dust suppression microcapsule, and preparation method and application thereof
  • Sustained-release dust suppression microcapsule, and preparation method and application thereof
  • Sustained-release dust suppression microcapsule, and preparation method and application thereof

Examples

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preparation example Construction

[0035]Such as figure 1 Shown, the preparation method of the sustained-release type dust-suppressing microcapsule provided by the invention comprises the following steps:

[0036] S101: After mixing sodium lignosulfonate and calcium chloride evenly, add acrylic acid and stir well. Then, a crosslinking agent was added to the above solution and protected by nitrogen gas, and reacted at 45° C. for 1 hour to obtain the first solution;

[0037] S102: raising the temperature to 60° C., continuing to add acrylamide and an initiator to the first solution, continuously stirring and reacting for 2 hours, to obtain a second solution;

[0038] S103: dissolving ethyl cellulose and chitosan in distilled water and stirring evenly, adding a pH agent, and adjusting it to about 4-5 to obtain a wall material solution. Then add an emulsifier to the second solution, and after being fully mixed, drop it into the wall material solution, ultrasonically disperse for 2 hours, and obtain an emulsified ...

Embodiment 1

[0046] The preparation method of the slow-release dust-suppressing microcapsules provided by the present invention comprises: weighing 2g of sodium lignosulfonate and adding it into a three-neck flask filled with 100ml of distilled water, then adding 0.1g of calcium chloride and mixing evenly, after fully dissolving, adding 6g of acrylic acid and 0.2g of N-N methylenebisacrylamide were stirred thoroughly, and nitrogen gas was passed into the three-necked flask, and stirred and reacted at 45°C for 1h. After it was cooled to room temperature, 7g of acrylamide and 0.1g of ammonium persulfate were added, the temperature was raised to 60°C, and the mixture was continuously stirred and reacted for 2 hours to obtain a core material solution. Dissolve 1g of ethyl cellulose and 1g of chitosan in 100ml of distilled water and stir evenly, then add glacial acetic acid to adjust the pH to 4. After fully mixed, add it dropwise to the core material solution, and take it out after ultrasonic d...

Embodiment 2

[0048] The preparation method of the slow-release dust-suppressing microcapsules provided by the present invention comprises: weighing 2g of sodium lignosulfonate and adding it into a three-neck flask filled with 100ml of distilled water, then adding 0.1g of calcium chloride and mixing evenly, after fully dissolving, adding 6g of acrylic acid and 0.2g of N-N methylenebisacrylamide were stirred thoroughly, and nitrogen gas was passed into the three-necked flask, and stirred and reacted at 45°C for 1h. After it was cooled to room temperature, 7g of acrylamide and 0.1g of ammonium persulfate were added, the temperature was raised to 60°C, and the mixture was continuously stirred and reacted for 2 hours to obtain a core material solution. Dissolve 1g of ethyl cellulose and 2g of chitosan in 100ml of distilled water and stir evenly, then add glacial acetic acid to adjust the pH to 4. After fully mixed, add it dropwise to the core material solution, and take it out after ultrasonic d...

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Abstract

The invention belongs to the field of coal mine dust suppression and the technical field of microcapsules. The invention discloses a sustained-release dust suppression microcapsule, and a preparationmethod and application thereof; the sustained-release dust suppression microcapsule comprises, by the mass percentage, 1%-2% of sodium lignin sulfonate, 3%-5% of acrylamide, 2%-4% of acrylic acid, 0.08%-0.1% of a cross-linking agent, 0.03%-0.05% of an initiator, 0.02%-0.04% of calcium chloride, 0.1%-0.3% of an emulsifier, 1%-3% of chitosan, 1%-3% of ethyl cellulose, 2%-4% of dichloromethane, 1%-2%of glutaraldehyde, 0.1%-0.3% of a pH regulator and the balance being water making the total amount be 100%. A degradable dust suppressant is used as a core material, a sustained-release aggregate isused as a wall material, and an ultrasonic emulsification crosslinking method is adopted for preparation; the release rate of the dust suppressant is increased, the water retention time of the dust suppressant is prolonged, and the dust suppression efficiency of the dust suppressant is improved.

Description

technical field [0001] The invention belongs to the technical field of coal mine dust suppression and microcapsules, and in particular relates to a slow-release dust suppression microcapsule, a preparation method and an application. Background technique [0002] At present, coal, as the main energy source in our country, has an irreplaceable status. With the continuous improvement of the level of mechanization in the coal mining process, the dust in the operation and production process has also seriously exceeded the standard, which seriously threatens the health of miners. Among the occupational safety and health problems caused by exposure to various occupational hazards in the working environment, the number of new cases of occupational diseases, the cumulative number of cases and the number of fatal cases of coal workers' pneumoconiosis rank first in the world. By the end of 2018, a total of 975,000 cases of occupational diseases had been reported, of which 873,000 were...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F251/02C08F220/56C08F220/06C08F222/38C08J3/24C08L51/02C08K5/07C09K3/22
CPCC08F251/00C08F251/02C08J3/246C09K3/22C08J2351/02C08J2451/02C08K5/07
Inventor 周刚李帅龙姜文静牛琛茜薛轶方张欣远王存民刘冬刘宗奇王钰颖孙健孟群智
Owner SHANDONG UNIV OF SCI & TECH
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