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Preparation method of porous calcium carbonate crystal particle having nanometer cone microstructure

A technology of porous calcium carbonate and microstructure, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, etc., can solve the problems of block copolymers not being naturally degradable, environmental protection, complicated routes, and deviation from bionic routes

Active Publication Date: 2012-06-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a single system cannot obtain calcium carbonate crystals with complex structures, and most block copolymers are not naturally degradable, which poses environmental concerns
Using preset templates (such as styrene microspheres) to prepare calcium carbonate crystals with special shapes is also a method that has been studied more. Although this approach can often obtain crystals with novel shapes, the route is often complicated and far away. Deviated from the bionic route

Method used

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  • Preparation method of porous calcium carbonate crystal particle having nanometer cone microstructure
  • Preparation method of porous calcium carbonate crystal particle having nanometer cone microstructure
  • Preparation method of porous calcium carbonate crystal particle having nanometer cone microstructure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]After the 1L glass beaker is cleaned up, the preparation concentration is 0.02g / L sulfonated polyaspartic acid derivative (this sulfonated polyaspartic acid derivative refers to the literature (Macromolecular Materials Science and Engineering, 2008, 24, 44-50) is prepared by reacting taurine with polysuccinimide, m / n=40 / 100) aqueous solution 950ml, under stirring, adjust the pH value of the aqueous solution of sulfonated polyaspartic acid derivatives to 5 with hydrochloric acid, Inject 10ml of 2mol / L calcium hydroxide aqueous solution, stir evenly, and continue to inject 10ml of 2mol / L sodium carbonate aqueous solution; after the injection is completed, stand and age at room temperature and dustproof for 5 hours, separate and dry the solid product to obtain rod-shaped and spherical The main particle size or length dimension is 1-3μm, with a specific surface area of ​​10-30m with a regular triangle with a side length of about 400nm as the base 2 / g of porous calcium carbo...

Embodiment 2

[0037] After cleaning the 1L glass beaker, prepare hydroxylated polyaspartic acid with a concentration of 4g / L (the molar ratio of hydroxylamine to polyaspartic acid is 1:10; 2 o 5 Carry out amidation reaction preparation for dehydrating agent, m / n=10 / 100) aqueous solution 500ml, adjust the pH value of hydroxylated polyaspartic acid aqueous solution to be 8 with aqueous sodium hydroxide solution under stirring, inject the calcium nitrate of 0.2mol / L 250ml of aqueous solution, after stirring evenly, continue to inject 250ml of 0.2mol / L potassium carbonate aqueous solution; after the injection is completed, stand and age at room temperature and dustproof for 150 hours, separate and dry the solid product, and obtain the particle size or length mainly in dumbbell shape and spherical shape The size is 2-6μm, and the specific surface area is 230-300m 2 / g Porous calcium carbonate crystal particles with nano-pyramid microstructure units with side lengths of 100-300nm regular triangl...

Embodiment 3

[0040] After cleaning the 1L glass beaker, prepare 900ml of a mixed aqueous solution containing 0.1g / L of polyaspartic acid and 0.001g / L of 2-aminoethanol, wherein the mole of the hydroxyl group in the mixed aqueous solution and the carboxyl group of polyaspartic acid The ratio is about 1:50; under stirring, adjust the pH value of the above-mentioned mixed aqueous solution to 13 with potassium hydroxide, inject 100 ml of 0.02 mol / L calcium nitrate aqueous solution, and continue to inject 10 ml of 0.2 mol / L potassium carbonate aqueous solution after stirring evenly; After the completion of the aging at room temperature for 70 hours, the solid product was separated and dried to obtain dumbbell-shaped and spherical particles with a particle size or length of 1.5-5 μm and a specific surface area of ​​110-160 m 2 / g Porous calcium carbonate crystal particles with nano-cone microstructure units with a side length of 200-500 μm regular triangle as the base.

[0041] The SEM photo of ...

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Abstract

The invention which belongs to the biomimetic synthesis inorganic material field concretely relates to a preparation method of a porous calcium carbonate crystal particle having a nanometer cone microstructure unit. The preparation method comprises the following steps: 1, preparing an organic additive solution with a certain concentration, and putting the organic additive solution into a cleaned container; 2, adjusting the pH value of organic additive solution to 5-13 by an acid solution or an alkali solution under stirring, adding an aqueous calcium salt or calcium hydroxide solution, uniformly stirring, and adding an aqueous carbonate solution to obtain a mixed solution, wherein the molar ratio of the calcium salt or calcium hydroxide to the carbonate is 1:1; 3, carrying out stationary ageing on the mixed solution under dustproof room temperature conditions; and 4, separating, and drying the obtained solid product to obtain the porous calcium carbonate crystal particle having the nanometer cone microstructure unit. The method of the invention has the advantages of simple operation and energy saving. The morphology, the particle size, the specific surface area and the cone microstructure unit dimension of the obtained porous calcium carbonate crystal particle can be regulated through regulating the concentration of the organic additive solution and the stationary ageing time in the invention.

Description

technical field [0001] The invention belongs to the field of biomimetic synthesis of inorganic materials, in particular to a method for preparing porous calcium carbonate crystal particles with nanocone microstructure units. Background technique [0002] Calcium carbonate has a wide range of uses, and is a filler and raw material for papermaking, rubber, coatings, beverages, wires, cables, paints, glass, ceramics, adhesives, and daily chemicals. Due to the rapid development of the plastics industry, paper industry, paint industry, rubber industry, and emerging building materials industry, the demand for ground calcium carbonate (GCC) and light calcium carbonate (PCC) is increasing in the world. At present, my country's calcium carbonate industry has made considerable progress, but ultra-fine calcium carbonate and calcium carbonate with special shapes have always relied on imports. Import nearly 100,000 tons of special calcium carbonate products (including nanometer and sub-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00
Inventor 闫丰文袁国卿张晓慧张抒峰郭存悦
Owner INST OF CHEM CHINESE ACAD OF SCI
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