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A preparation method of core-shell nanoparticle assembly structure with calcium carbonate shell

A nanoparticle, assembling structure technology, applied in calcium carbonate/strontium/barium, nanotechnology for materials and surface science, nanotechnology, etc. Incomplete, insufficient coating and other problems, to achieve the effect of increased specific surface area, uniform size, uniform particle size

Active Publication Date: 2020-03-13
恩平市汇成新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating process usually needs to overcome the incomplete coating between the surface modifier and the core, as well as the difficulty in combining the surface modifier with the shell material. Insufficient coating in each link will lead to the core-shell material The coverage is incomplete
At present, there are many methods for preparing calcium carbonate, but how to prepare calcium oxide-calcium carbonate core-shell nanoparticles with a core-shell structure and achieve complete coating has not been reported. The present invention abandons the idea of ​​synthesizing core-shell materials through surface modification, and adopts In situ growth prepared fully coated calcium oxide-calcium carbonate core-shell nanoparticles and assembled them into porous structures

Method used

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  • A preparation method of core-shell nanoparticle assembly structure with calcium carbonate shell

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Experimental program
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Effect test

Embodiment 1

[0022] 1) Disperse calcium oxide particles with a particle size of 2 μm in deionized water, add a composite surfactant composed of dodecyldimethylbenzyl ammonium chloride and lauric acid thiourea imidazoline surfactant, and stir well The mol ratio of calcium oxide and lauryl dimethyl benzyl ammonium chloride, lauric acid thiourea imidazoline surfactant is 1: 0.7: 0.05;

[0023] 2) Treat the feed liquid obtained in step 1) under microwave for 25min, microwave power 500W;

[0024] 3) The feed liquid obtained in step 2) is introduced into the liquid inlet end of the atomizing nozzle, and carbon dioxide gas is introduced into the inlet end of the atomizing nozzle. The feed ratio of the feed liquid to carbon dioxide is 1g: 200mL. Under ultrasonic conditions, the The liquid is sprayed;

[0025] 4) Collect the sprayed feed liquid, control the number of revolutions of centrifugal separation, and wash with deionized water 2-3 times;

[0026] 5) Re-disperse in deionized water, sonicat...

Embodiment 2

[0028] 1) Disperse calcium oxide particles with a particle size of 3 μm in deionized water, add a composite surfactant composed of dodecyldimethylbenzyl ammonium chloride and lauric acid thiourea imidazoline surfactant, and stir well The mol ratio of calcium oxide and lauryl dimethyl benzyl ammonium chloride, lauric acid thiourea imidazoline surfactant is 1: 0.9: 0.2;

[0029] 2) Treat the feed liquid obtained in step 1) under microwave for 35min, microwave power 600W;

[0030] 3) The feed liquid obtained in step 2) is introduced into the liquid inlet end of the atomizing nozzle, and carbon dioxide gas is introduced into the inlet end of the atomizing nozzle. The feed ratio of the feed liquid to carbon dioxide is 1g: 400mL. Under ultrasonic conditions, the The liquid is sprayed;

[0031] 4) Collect the sprayed feed liquid, control the number of revolutions of centrifugal separation, and wash with deionized water 2-3 times;

[0032] 5) Re-disperse in deionized water, sonicate...

Embodiment 3

[0034] 1) Disperse calcium oxide particles with a particle size of 1 μm in deionized water, add a composite surfactant composed of dodecyldimethylbenzyl ammonium chloride and lauric acid thiourea imidazoline surfactant, and stir well The mol ratio of calcium oxide and lauryl dimethyl benzyl ammonium chloride, lauric acid thiourea imidazoline surfactant is 1: 0.7: 0.05;

[0035] 2) Treat the feed liquid obtained in step 1) under microwave for 25min, microwave power 500W;

[0036] 3) The feed liquid obtained in step 2) is introduced into the liquid inlet end of the atomizing nozzle, and carbon dioxide gas is introduced into the inlet end of the atomizing nozzle. The feed ratio of the feed liquid to carbon dioxide is 1g: 200mL. Under ultrasonic conditions, the The liquid is sprayed;

[0037] 4) Collect the sprayed feed liquid, control the number of revolutions of centrifugation, wash with deionized water 2-3 times, and dry;

[0038] 5) Redisperse in deionized water, sonicate un...

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Abstract

The invention relates to a preparation method of a core-shell nano particle assembly structure having a calcium carbonate shell layer. The calcium oxide particles are dispersed in deionized water, a composite surfactant of dodecyl dimethyl benzyl ammonium chloride and thiourea imidazoline laurate is added, the materials are processed for 25-35 min under microwave, material liquid is introduced toa liquid inlet end of an atomizing nozzle, carbon dioxide gas is introduced into a gas inlet end of the atomizing nozzle, and under ultrasonic condition, the material liquid is subjected to spraying,centrifuged washing and strong ultrasound to obtain the core-shell nano particle assembly structure having the calcium carbonate shell layer.

Description

technical field [0001] The invention belongs to the field of preparation of calcium carbonate materials, and in particular relates to a method for preparing a core-shell nanoparticle assembly structure with a calcium carbonate shell. Background technique [0002] Calcium carbonate is widely used in industries such as rubber, plastics, coatings, papermaking, inks, glue dispensing agents, sealants, etc. It can also be used in industries such as toothpaste, food, medicine, word materials, building materials, and chemical fibers. The crystal forms of calcium carbonate include calcite, aragonite and vaterite, among which calcite has the most stable structure, and aragonite and vaterite are both unstable. [0003] Core-shell particles are generally nanostructures formed by coating one nanomaterial on the surface of another nanomaterial through chemical bonds or other forces. For example, surface modification is carried out on the core structure, and then the coating of the shell ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18B01J13/00B82Y30/00B82Y40/00
CPCB01J13/00B82Y30/00B82Y40/00C01F11/18C01P2004/32C01P2004/61C01P2004/62Y02P20/141
Inventor 唐洁净
Owner 恩平市汇成新材料有限公司