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A kind of inorganic hollow particle and preparation method thereof

A hollow particle and inorganic technology, applied in the direction of inorganic chemistry, chemical instruments and methods, phosphorus compounds, etc., can solve the complex and cumbersome preparation process of inorganic hollow particles, time-consuming and labor-intensive layered coating, affecting the purity of raw materials, etc., to achieve compact morphology , high uniformity, low price effect

Active Publication Date: 2018-07-03
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hollow microspheres obtained by this method can stably protect the molecules encapsulated in the capsule, the manufacturing process is cumbersome, and the layered coating is time-consuming and laborious.
[0005] The "Journal of Physical Chemistry" (J.Phys.Chem.C, 2009, the 113th volume, 8313-8319 pages) of the United States introduced the preparation of SiO 2 , Al 2 o 3 , and TiO 2 Hollow microcapsules with a porous shell, the porous shell material helps to absorb organic molecules, but surfactants need to be added in the production process, and finally the porous shell hollow spheres can be obtained after calcination, the production process is more troublesome and due to the additives Addition will affect the purity of raw materials
[0006] Therefore, the complex and cumbersome preparation process of inorganic hollow particles has become one of the bottlenecks in its wide application and industrial production. How to find a simpler and easier preparation method of inorganic hollow particles has become a research topic in the field of hollow particles. The direction of practical exploration

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  • A kind of inorganic hollow particle and preparation method thereof
  • A kind of inorganic hollow particle and preparation method thereof
  • A kind of inorganic hollow particle and preparation method thereof

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preparation example Construction

[0054] The invention provides a method for preparing inorganic hollow particles, comprising the following steps:

[0055] A) After separating the mixed system after the sodium carbonate solution and the calcium chloride solution are mixed, calcium carbonate particles are obtained;

[0056] B) reacting the calcium carbonate particles, soluble phosphate and water obtained in the above steps to obtain solid calcium phosphate particles;

[0057] C) Reacting the solid calcium phosphate microparticle system obtained in the above steps with an inorganic acid to obtain inorganic hollow microparticles.

[0058] The preferred principles or specific preferred schemes such as the nature, structure, and ratio of the raw materials or products in the preparation method of the present invention are consistent with the preferred principles and specific preferred schemes of the aforementioned inorganic hollow particles, and will not be repeated here.

[0059] In the present invention, the mixe...

Embodiment 1

[0077] According to the molar ratio of sodium carbonate and calcium phosphate as 1:1, successively dissolve 1.74883g (0.33M) sodium carbonate and 1.83117g (0.33M) calcium chloride in 50ml of distilled water until the sodium carbonate and calcium chloride are fully dissolved To form a clear solution, quickly mix them together, stir for 30s, put them into a centrifuge immediately, and wash them alternately with water and ethanol for 3 times to obtain uniform spherical calcium carbonate.

[0078] see figure 1 , figure 1 Spherical CaCO prepared for Example 1 3 Scanning electron microscope (SEM) photographs of raw materials. see figure 2 , figure 2 Spherical CaCO prepared for Example 1 3 X-ray diffraction pattern (XRD) of raw materials. Such as figure 1 and 2 As shown, the calcium carbonate of the ball nepheline structure also contains a small part of calcite. Therefore, strictly control the time, and do not pour it slowly when mixing, because if it is too short, it will...

Embodiment 2

[0084] Dissolve 1.74883g (0.33M) of sodium carbonate and 1.83117g (0.33M) of calcium chloride in 50ml of distilled water respectively. After the sodium carbonate and calcium chloride are fully dissolved into a clear solution, quickly mix them together, stir for 30 seconds, and immediately Put it into a centrifuge for centrifugation, and wash it alternately with water and ethanol three times respectively to obtain uniform spherical calcium carbonate. Take 1g of calcium carbonate and 1g of diammonium hydrogen phosphate and add it to 10ml of distilled water, stir evenly for 1 hour, put it in an oven at 80°C for 2 hours, take it out and let it cool, then add 100ul of acetic acid and let it stand for 2 hours, shake it occasionally to make it fully react. Then centrifuge and wash 2 times with ethanol, then vacuum dry to get hollow calcium phosphate microspheres, see Figure 11 , is a scanning electron microscope (SEM) photo of the CaP hollow spheres prepared in Example 2.

[0085] ...

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Abstract

The invention provides an inorganic hollow particle which is prepared from calcium phosphate.The inorganic hollow particle has a shell structure and is uniform and compact in surface.The micron-size calcium phosphate hollow particle has the high uniformity, the shell structure is loose and porous to be beneficial for absorption of molecules, and the particle is uniform and regular in surface and compact in morphology and has a spherical shell with a flaky surface; the particle is controllable in shape, can be regulated into different shapes such as the square shape and the spherical shape and has a non-laminated assembled or stacked structure; from the section of the shell, it can be seen that the section of the shell is of a deposited structure, and the single, integral and uniform shell structure is achieved.

Description

technical field [0001] The invention relates to the technical field of nanomaterial synthesis, in particular to an inorganic hollow particle and a preparation method thereof. Background technique [0002] Hollow particles refer to a micro container or package with outer walls. It is usually used to embed and seal solid, liquid or gas in its microparticles to become a solid particle product, with diameters ranging from millimeters to microns. From a morphological point of view, hollow particles include any regular or irregular shape such as spherical or square, and most of them are spherical. From the material, they can be divided into organic materials and inorganic materials. Hollow particles of organic materials and the materials covered inside are usually The so-called microcapsules, in recent years, hollow particle technology has been widely used in the immobilization of microorganisms, animal and plant cells, enzymes and other biologically active substances and chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/32
CPCC01B25/32C01B25/327C01P2002/72C01P2004/03C01P2004/34C01P2004/61
Inventor 俞书宏常芙嘉高怀岭杨思瑶
Owner UNIV OF SCI & TECH OF CHINA