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Method for preparing structure controllable barium carbonate composite particles

A technology of composite particles and barium carbonate, which is applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve the problems of high experimental cost, difficulty in realizing the structure and shape of barium carbonate particles, and precise regulation, so as to achieve a uniform reaction system , The preparation method is simple and easy to operate, and the effect of solvent pollution is small

Inactive Publication Date: 2011-07-20
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But it is worth noting that although many synthetic organic compounds can effectively adjust the structure, particle size and morphology of barium carbonate, so as to obtain barium carbonate particles with unique structure and controllability, due to the high cost of experiments, these methods are mainly used as As a means of studying the mechanism of aggregation, it is obviously not suitable as a method for large-scale production of barium carbonate particles with controlled structure.
Although the traditional industrial production of barium carbonate has a simple preparation process, it is difficult to precisely control the structure and morphology of barium carbonate particles.

Method used

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  • Method for preparing structure controllable barium carbonate composite particles
  • Method for preparing structure controllable barium carbonate composite particles
  • Method for preparing structure controllable barium carbonate composite particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] All glassware used in the experiments were pretreated by first sonicating in ethanol for 15 min, and then removed and rinsed with deionized water. Put it into a mixed solvent of concentrated nitric acid / hydrogen peroxide / water in a ratio of 1:1:1 and soak for 2 days, take it out, wash it with acetone, and dry it at room temperature. Prepare 100 milliliters of carboxymethyl cellulose (weight average molecular weight: 90,000) aqueous solution of 10 g / L, then add a certain amount of barium chloride to prepare a 0.01 mol / L barium chloride solution, and adjust the pH of the solution to 8. Cover the beaker containing the solution with aluminum foil, and prick 3 pinholes in the aluminum foil. Take 20 grams of ammonium carbonate, grind it to a powder with a fineness of 100 mesh, put it in a 50 ml beaker, cover the mouth of the beaker with a polyethylene film, and prick 10 holes with a needle. Then put it into a desiccator with a volume of about 10 liters together with the abov...

Embodiment 2

[0063] The glass instrument processing method is the same as in Example 1. Prepare 100 milliliters of carboxymethyl cellulose (weight-average molecular weight is 90,000) aqueous solution of 1 gram / liter, add a certain amount of barium chloride and be mixed with the barium chloride solution of 0.01 mol / liter, adjust the pH of solution to be 8.5, will contain The beaker with the solution was covered with aluminum foil, and 3 pinholes were pierced in the aluminum foil. Take 20 grams of ammonium carbonate, grind it to a powder with a fineness of 100 mesh, put it in a 50 ml beaker, cover the mouth of the beaker with a polyethylene film, and prick 10 holes with a needle. Then put it into a desiccator with a volume of about 10 liters together with the above-mentioned beaker containing the solution, seal it, and start the reaction at a temperature of 20±1°C. After reacting for 12 hours, the resulting suspension was centrifuged and washed alternately with water and ethanol three times...

Embodiment 3

[0065] The glass instrument processing method is the same as in Example 1. Prepare 100 milliliters of carboxymethylcellulose (weight-average molecular weight is 90,000) aqueous solution of 0.1 gram / liter, add a certain amount of barium chloride and be mixed with the barium chloride solution of 0.1 mol / liter, adjust the pH of solution to be 9, will contain The beaker with the solution was covered with aluminum foil, and 3 pinholes were pierced in the aluminum foil. Take 20 grams of ammonium carbonate, grind it to a powder with a fineness of 100 mesh, put it in a 50 ml beaker, cover the mouth of the beaker with a polyethylene film, and prick 10 holes with a needle. Then put it into a desiccator with a volume of about 10 liters together with the above-mentioned beaker containing the solution, seal it, and start the reaction at a temperature of 20±1°C. After reacting for 12 hours, the resulting suspension was centrifuged and washed alternately with water and ethanol three times e...

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Abstract

The invention belongs to the field of organic and inorganic composite materials, and provides a method for preparing polymer / barium carbonate composite particles of needle-like agglomerates by taking carbon dioxide as a carbonate radical source. The carbon dioxide obtained by decomposing carbonate, or high pressure carbon dioxide is directly used as the carbonate radical source, is diffused into a reaction system, and is combined with barium ions under the control of polymer to form the composite particles with unique agglomerate structures. The structure, appearance, polymer content and the like of the composite particles can be controlled by changing corresponding experimental parameters easily; and the products are easy to separate, uniform in property and stable, and have potential application prospect in the fields such as electronics, glass, ceramic industry and the like. In the method, raw materials are wide in sources and low in prices; and the preparation method is easy to operate, and the adopted solvent is light in pollution, does not have any harmful effect, and meets the requirement of green chemistry.

Description

Technical field: [0001] The invention belongs to the field of organic-inorganic composite materials and relates to a preparation method of barium carbonate composite particles. In particular, it is a method for preparing barium carbonate composite particles with controllable structure. Background technique: [0002] Alkaline earth metal carbonates, including calcium carbonate, barium carbonate, strontium carbonate, etc., are often used as template inorganic minerals to study the mechanism of carbonate mineralization in organisms. For example, as one of the main inorganic components of biominerals, calcium carbonate formed under the guidance of organic substrates such as proteins and polysaccharides (such as invertebrate shells) has a highly ordered layered structure and good mechanical properties. It plays the role of structural support and protection in organisms (S. Mann, G A. Ozin, Nature, 1996, 382, ​​313). At the same time, the above-mentioned minerals, as important i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/21C08J3/12C08L1/08C08K3/26C09C1/02C09C3/10
Inventor 李为武培怡孙胜童余启斯
Owner FUDAN UNIV
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