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A kind of ultrasonic-assisted method for preparing vaterite-type calcium carbonate nanoparticles

An ultrasonic-assisted, nanoparticle technology, applied in the fields of calcium carbonate/strontium/barium, nanotechnology, nanotechnology, etc., can solve the problem of difficulty in obtaining ultra-small-sized nano-calcium carbonate

Active Publication Date: 2018-07-10
浙江振鑫新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the nano-calcium carbonates prepared in the prior art are micron and sub-micron in size, and it is difficult to obtain ultra-small-sized nano-calcium carbonates with stable vaterite crystal forms.

Method used

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  • A kind of ultrasonic-assisted method for preparing vaterite-type calcium carbonate nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Prepare solution a: Dissolve calcium nitrate in deionized water so that the concentration of calcium salt is 1mol / L, add ethylene glycol butyl ether, the molar ratio of calcium salt to ethylene glycol butyl ether is 1:1, and stir well ;

[0023] 2) Preparation of solution b: dissolving sodium carbonate in deionized water;

[0024] 3) Dissolve polyethylene glycol in toluene, the mass concentration of polyethylene glycol in toluene is 12%, add solution a, the volume ratio of toluene to solution a is 5:1, stir at 50°C for 1h, cool to room temperature , under ultrasonication, add solution b, ultrasonically react for 15min, ultrasonic power is 150W, and the molar ratio of calcium ion and carbonate ion in the reaction system is 1:1;

[0025] 4) Collect the product, centrifuge, wash, and dry to obtain vaterite-type calcium carbonate triangular conical nanoparticles.

Embodiment 2

[0027] 1) Prepare solution a: Dissolve calcium nitrate in deionized water so that the concentration of calcium salt is 1mol / L, add ethylene glycol butyl ether, the molar ratio of calcium salt to ethylene glycol butyl ether is 1:0.5, and stir evenly ;

[0028] 2) Preparation of solution b: dissolving sodium carbonate in deionized water;

[0029] 3) Dissolve polyethylene glycol in toluene, the mass concentration of polyethylene glycol in toluene is 12%, add solution a, the volume ratio of toluene to solution a is 5:1, stir at 50°C for 1h, cool to room temperature , under ultrasonication, add solution b, ultrasonically react for 15min, ultrasonic power is 150W, and the molar ratio of calcium ion and carbonate ion in the reaction system is 1:1;

[0030] 4) Collect the product, centrifuge, wash, and dry to obtain vaterite-type calcium carbonate triangular conical nanoparticles.

Embodiment 3

[0032] 1) Prepare solution a: Dissolve calcium nitrate in deionized water so that the concentration of calcium salt is 1mol / L, add ethylene glycol butyl ether, the molar ratio of calcium salt to ethylene glycol butyl ether is 1:1.5, and stir evenly ;

[0033] 2) Preparation of solution b: dissolving sodium carbonate in deionized water;

[0034] 3) Dissolve polyethylene glycol in toluene, the mass concentration of polyethylene glycol in toluene is 12%, add solution a, the volume ratio of toluene to solution a is 5:1, stir at 50°C for 1h, cool to room temperature , under ultrasonication, add solution b, ultrasonically react for 15min, ultrasonic power is 150W, and the molar ratio of calcium ion and carbonate ion in the reaction system is 1:1;

[0035] 4) Collect the product, centrifuge, wash, and dry to obtain vaterite-type calcium carbonate triangular conical nanoparticles.

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Abstract

The invention relates to a method of producing vaterite-type calcium carbonate nano-particles through ultrasonic assistance. Ethylene glycol butyl ether is used as a crystal form controlling agent and a morphology control agent. An interface reaction, through collision between organic-phase and water-phase liquid drops, of reactants is initiated through ultrasound wave, thereby producing stable vaterite-phase trigonal bipyramid-shaped calcium carbonate nano-particles which has the surface (100), particle size being about 200-300 nm.

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 nanometer calcium carbonate. 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 them, calcite has the most stable structure, while aragonite and vaterite are both in an unstable state, and it is difficult for vaterite to exist stably. [0003] Nano-calcium carbonate has small particle size and large specific surface area. Compared with ordinary calcium carbonate, it has excellent performance. Nano-calcium carbonate with a particle size of 10-100nm has a reinforcing effect on rubber and plasti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18B82Y30/00
CPCB82Y30/00C01F11/183C01P2004/62
Inventor 唐洁净
Owner 浙江振鑫新材料科技有限公司
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