Calcite phase spherical porous calcium carbonate granule and preparation method thereof

A technology of porous calcium carbonate and calcite, applied in calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve problems such as poor dispersion, not suitable for biomedical applications, and serious powder agglomeration , to achieve the effects of mild preparation process, low energy consumption, promotion of attachment and proliferation, and high specific surface area

Inactive Publication Date: 2017-04-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The materials obtained by the above two methods contain toxic surfactants or additives and are therefore not suitable for biomedical applications
In addition, "Chemical World" reported on page 720 of

Method used

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  • Calcite phase spherical porous calcium carbonate granule and preparation method thereof
  • Calcite phase spherical porous calcium carbonate granule and preparation method thereof
  • Calcite phase spherical porous calcium carbonate granule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 10g CaCl 2 2H 2 O was dissolved in 400mL ethanol, and the above-mentioned mixed solution A was put into a glass jar. Put the ammonium bicarbonate powder into another 300mL glass jar. The above reaction glass containers were placed together in a sealed desiccator at 30° C. for 168 h, and a white precipitate was formed in the transparent solution. The precipitate was collected by centrifugation and dried under vacuum at 25°C to obtain a white powder. Then the obtained white powder was re-immersed in 40 mL of water / ethanol mixed solution F (containing 0.8 mL of water), left standing at 30° C. for 168 h, centrifuged, and dried to obtain calcite-phase spherical porous calcium carbonate particles. Such as figure 1 As shown in the TEM (A, B) and SEM (C, D, E) images, the material is composed of a pore structure obtained by the accumulation of rhombohedral calcium carbonate grains, spherical and round, with high crystallinity and three-dimensional penetration of the pores ...

Embodiment 2

[0050] 3.2g CaCl 2 2H 2 O was dissolved in 400mL ethanol, and the above-mentioned mixed solution A was put into a glass jar. Put the ammonium bicarbonate powder into another 300mL glass jar. The above reaction glass containers were placed together in a sealed desiccator at 30° C. for 72 hours, and a white precipitate was formed in a transparent solution. The precipitate was collected by centrifugation and dried under vacuum at 25°C to obtain a white powder. Then the obtained white powder was re-immersed in 40 mL of water / ethanol mixed solution F (containing 0.8 mL of water), left standing at 30° C. for 168 h, centrifuged and dried to obtain calcite-phase spherical porous calcium carbonate particles. The obtained material is composed of a pore structure obtained by stacking calcite-phase calcium carbonate crystal grains, is spherical and round, and has a particle diameter of less than 3 μm, and the particle diameter of the calcite-phase calcium carbonate crystal grains is 50...

Embodiment 3

[0052] 16g CaCl 2 2H 2O was dissolved in 400 mL of ethanol, and the above mixed solution A was filled into a glass jar. Put the ammonium bicarbonate powder into another 300mL glass jar. The above reaction glass containers were placed together in a sealed desiccator at 30° C. for 240 h, and a white precipitate was formed in the transparent solution. The precipitate was collected by centrifugation and dried under vacuum at 25°C to obtain a white powder. Then the obtained white powder was re-immersed in 40 mL of water / ethanol mixed solution F (containing 2 mL of water), left standing at 30° C. for 48 h, centrifuged, and dried to obtain calcite-phase spherical porous calcium carbonate particles. The obtained material is composed of a pore structure obtained by stacking calcite-phase calcium carbonate crystal grains, is spherical and round, and has a particle diameter of less than 3 μm, and the particle diameter of the calcite-phase calcium carbonate crystal grains is 50-200 nm....

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Abstract

The invention relates to a calcite phase spherical porous calcium carbonate granule and a preparation method thereof, and the calcite phase spherical porous calcium carbonate granule is a calcite phase solid core spherical calcium carbonate granule with multipe nano pores, and comprises accumulated crystal particles. A NH3 and CO2 mixed gas is used for diffusion and reaction with calcium ions in a water and ethanol mixed solution of a soluble calcium salt. The NH3 dissolved in the water /ethanol mixed solution produces a weak alkaline solution to promote the reaction of the CO2 and the calcium ions to produce amorphous calcium carbonate, and further the amorphous calcium carbonate is gradually self-assembled and partially crystallized to produce white precipitate E. After centrifugal drying, the white precipitate E is soaked in water / ethanol mixed solution F, after mutual fusion growth and crystallization of the calcium carbonate, accumulation pores in the range of 10-400nm are formed, and further the calcite phase spherical porous calcium carbonate granule with a high degree of crystallinity is formed.

Description

technical field [0001] The invention belongs to the field of manufacturing inorganic / organic nanometer materials, and in particular relates to a calcite-phase spherical porous calcium carbonate particle and a preparation method thereof. Background technique [0002] Calcium carbonate is a natural mineral that exists in abundance in nature and is widely used in industrial production such as plastics, coatings, rubber, paper, sealants and daily necessities. In addition, due to its excellent biocompatibility and degradability, it also has great application potential in cosmetic, pharmaceutical, and biomedical fields. With the gradual refinement of the application of calcium carbonate materials, many special requirements have been put forward for the structural design and preparation process of calcium carbonate, which has promoted the development of calcium carbonate products to finer particle size, controllable microstructure and green synthesis technology. The direction is d...

Claims

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Application Information

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IPC IPC(8): C01F11/18A61K47/02A61K33/10A61P1/02A61P37/08A61L27/56A61L27/02
CPCC01F11/184A61K33/10A61K47/02A61L27/025A61L27/56A61L2430/02C01F11/185C01P2002/72C01P2002/80C01P2004/03C01P2004/04C01P2004/50C01P2004/61C01P2004/62C01P2006/12C01P2006/16
Inventor 马明陈航榕施剑林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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