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Synthesis method of amorphous calcium carbonate nanoparticles with controllable particle size

A nanoparticle, calcium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of amorphous calcium carbonate nanoparticles that do not have particle size controllability Problems such as poor particle size uniformity

Active Publication Date: 2016-03-02
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Equally, the particle size uniformity of the amorphous calcium carbonate nano-particle that this kind of method obtains is poor, does not have particle size controllability

Method used

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  • Synthesis method of amorphous calcium carbonate nanoparticles with controllable particle size
  • Synthesis method of amorphous calcium carbonate nanoparticles with controllable particle size
  • Synthesis method of amorphous calcium carbonate nanoparticles with controllable particle size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 0.2g of calcium chloride dihydrate to 100ml of absolute ethanol, and add 1ml of water after it is completely dissolved. Place the above liquid in a 150ml glass jar, seal the mouth of the bottle with a parafilm, and reserve a small hole on the parafilm. The ammonium bicarbonate solid was packed into a 20ml glass jar, the mouth of the bottle was sealed with a parafilm, and a small hole was reserved on the parafilm. The above two reactors were placed together in a sealed desiccator, and kept at a constant temperature of 30° C. for 24 hours to obtain a translucent white liquid. The liquid was centrifuged (8,000 rpm, 10 minutes), and the white precipitate was collected and washed with absolute ethanol to obtain amorphous calcium carbonate nanoparticles, which were stored in absolute ethanol. Characterized by X-ray diffraction patterns, such as figure 1 As shown, the characteristic spectrum of amorphous is shown in the spectrum, and there is no characteristic diffractio...

Embodiment 2

[0043] Add 0.1g of calcium chloride dihydrate to 100ml of absolute ethanol, and add 1ml of water after it is completely dissolved. Place the above liquid in a 150ml glass jar, seal the mouth of the bottle with a parafilm, and reserve a small hole on the parafilm. The ammonium bicarbonate solid was packed into a 20ml glass jar, the mouth of the bottle was sealed with a parafilm, and a small hole was reserved on the parafilm. The above two reactors were placed together in a sealed desiccator, and kept at a constant temperature of 30° C. for 24 hours to obtain a translucent white liquid. The liquid was centrifuged (10,000 rpm, 10 minutes), and the white precipitate was collected and washed with absolute ethanol to obtain amorphous calcium carbonate nanoparticles, which were stored in absolute ethanol. The morphology of such nanoparticles is image 3 As shown, the particle size is 86nm, and the particle size is uniform, forming a monodisperse state.

Embodiment 3

[0045]Add 0.05g of calcium chloride dihydrate into 100ml of absolute ethanol, and add 0.75ml of water after completely dissolving. Place the above liquid in a 150ml glass jar, seal the mouth of the bottle with a parafilm, and reserve a small hole on the parafilm. The ammonium bicarbonate solid was packed into a 20ml glass jar, the mouth of the bottle was sealed with a parafilm, and a small hole was reserved on the parafilm. The above two reactors were placed together in a sealed desiccator, and kept at a constant temperature of 30° C. for 24 hours to obtain a translucent white liquid. The liquid was centrifuged (12,000 rpm, 10 minutes), and the white precipitate was collected and washed with absolute ethanol to obtain amorphous calcium carbonate nanoparticles, which were stored in absolute ethanol. The morphology of such nanoparticles is Figure 4 As shown, the particle size is 56nm, and the particle size is uniform, forming a monodisperse state.

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Abstract

The invention relates to monodisperse non-crystal calcium carbonate nano-particles with uniform particle size ranging from 10 nm to 300 nm. The invention further discloses a method for preparing the monodisperse non-crystal calcium carbonate nano-particles. The method comprises steps as follows: a, an ethanol solution A of calcium chloride is prepared; b, water is added into the solution A, and a reaction liquid B is obtained; c, the reaction liquid B is placed into a container C, an opening of the container C is sealed, and a small hole is performed in a sealing film; d, ammonium bicarbonate solids are loaded into a container D, an opening of the container D is sealed, and a small hole is performed in a sealing film; e, the container C and the container D are jointly placed in a sealed dryer for standing, and a liquid in the container C becomes a suspension liquid E; and f, the suspension liquid E is subjected to centrifugal separation to obtain the calcium carbonate nano-particles.

Description

technical field [0001] The invention relates to nanomaterial synthesis technology, in particular to a method for preparing monodisperse amorphous calcium carbonate nanoparticles with controllable particle size. Background technique [0002] Calcium carbonate is a natural mineral ubiquitous in nature. It has good biocompatibility and biosafety, simple components, low cost, and easy large-scale preparation. As a form of calcium carbonate, amorphous calcium carbonate is a precursor for the crystallization of calcium carbonate into a crystal phase. Compared with micron-scale calcium carbonate crystals, amorphous calcium carbonate is easier to prepare nanoscale materials because it does not have a specific lattice structure. At present, as an excellent basic material, amorphous calcium carbonate nanomaterials have been widely included in many application researches, such as mechanical strength enhancement components in biomimetic, battery separators, bone tissue repair scaffolds...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18B82Y30/00
CPCC01F11/18C01P2002/72C01P2004/04C01P2004/52C01P2004/62C01P2004/64
Inventor 俞书宏汪伟赵阳
Owner UNIV OF SCI & TECH OF CHINA
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