A simple and convenient method for preparing calcium carbonate hollow microspheres

A kind of hollow microsphere, calcium carbonate technology

Active Publication Date: 2017-07-18
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above method, solid calcium carbonate microspheres are still mainly prepared, and there are deficiencies such as complex operation or adding control agents.

Method used

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  • A simple and convenient method for preparing calcium carbonate hollow microspheres
  • A simple and convenient method for preparing calcium carbonate hollow microspheres
  • A simple and convenient method for preparing calcium carbonate hollow microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: in the 50ml beaker, the sodium bicarbonate aqueous solution of 0.18mol / L and the calcium chloride ethanol solution of 0.18mol / L are respectively configured, and the solution is filtered and purified by 0.45 μm membrane, and then two kinds of the same volume Mix the solution, shake it quickly to make it gel, wait for 40 to 80 minutes to hydrate the gel, centrifuge the resulting precipitate, take the precipitate and wash it alternately with twice distilled water and absolute ethanol, and dry it at 100°C to obtain a calcium carbonate hollow Microspheres. The product obtained by the invention is a hollow calcium carbonate microsphere with a particle size of 400-800nm.

Embodiment 2

[0013] Example 2: 0.14mol / L sodium bicarbonate aqueous solution and 0.14mol / L calcium chloride ethanol solution were respectively configured in a 50ml beaker, and the solution was filtered and purified through a 0.45 μm filter membrane, and then the same volume of the two Mix the solution, shake it quickly to make it gel, wait for 40 to 80 minutes to hydrate the gel, centrifuge the resulting precipitate, take the precipitate and wash it alternately with twice distilled water and absolute ethanol, and dry it at 100°C to obtain a calcium carbonate hollow Microspheres. The product obtained by the invention is a hollow calcium carbonate microsphere with a particle size of 400-800nm.

Embodiment 3

[0014] Embodiment 3: configure respectively 0.1mol / L sodium carbonate aqueous solution and 0.1mol / L calcium chloride ethanol solution in a 50ml beaker, the solution is filtered and purified through a 0.45 μm filter membrane, and then two kinds of solutions of the same volume Mix and oscillate quickly to form a gel, wait for 40 to 80 minutes for the gel to hydrate, centrifuge the resulting precipitate, take the precipitate and alternately wash it with twice distilled water and absolute ethanol, and dry it at 100°C to obtain a hollow calcium carbonate microsphere. ball. The product obtained by the invention is a hollow calcium carbonate microsphere with a particle size of 400-800nm.

[0015] In each embodiment of the present invention, the rapid oscillation is to use a vortex mixer to oscillate for 4-7s, and the frequency of vibration of the vortex mixer is 2800 times / min. As a change, other oscillating equipment or hand shaking can also be used, as long as the mixed solution o...

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Abstract

The invention relates to a method for conveniently preparing calcium carbonate hollow microspheres. The method comprises the following steps: taking calcium carbonate as a raw material, and preparing calcium carbonate aqueous solution by water; taking calcium chloride as a raw material, preparing calcium chloride alcoholic solution by absolute ethyl alcohol; then, independently filtering and purifying the calcium carbonate aqueous solution and the calcium chloride alcoholic solution, then, mixing the two solutions, quickly vibrating to form gel, and standing to wait for 40-80 minutes to carry out gel hydration, and centrifuging generated precipitate; after carry out alternant washing by using redistilled water and the absolute ethyl alcohol, drying at 95-105DEG C to obtain the calcium carbonate hollow microspheres. The calcium carbonate hollow microspheres are prepared in room temperature water / alcohol mixed solution for the first time under the condition that other control agents are not added, the grain size of the calcium carbonate hollow microsphere is 400-800nm, and the specific surface area of the calcium carbonate hollow microsphere is large. The calcium carbonate hollow microsphere has the advantages of peculiar preparation method, simple process, low cost and safe and nontoxic raw materials; the calcium carbonate product of the hollow microsphere shape has a great application value in the fields such as medicine slow release.

Description

technical field [0001] The invention relates to a simple method for preparing calcium carbonate hollow microspheres, which belongs to the field of inorganic chemical industry. Background technique [0002] Calcium carbonate is a very important chemical raw material. It is widely distributed in nature and has low cost. It is widely used in plastics, coatings, pharmaceuticals, cosmetics and other industries. Calcium carbonate mainly has three different crystal forms: calcite, aragonite, and vaterite. In production and application, calcium carbonate materials with different crystal forms and different shapes have different properties and uses. Microspherical calcium carbonate is one of the hotspots of people's research and preparation, which has a wide range of uses. Calcium carbonate hollow microspheres, with their unique hollow structure, have received extensive attention, especially in the fields of biochemical and pharmaceuticals. [0003] At present, the artificially pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
CPCC01F11/18C01P2004/03C01P2004/04C01P2004/34C01P2004/61
Inventor 黄文艺马蓝宇王崇罡李利军程昊李彦青冯军孔红星罗应魏慧丹史志鹏
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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