Process for producing monodisperse polymer/calcium carbonate composite fine particle

A technology of composite particles and polymers, applied in the treatment of dyed macromolecular organic compounds, fibrous fillers, etc., can solve the problems of incompatibility and high experimental cost, and achieve the effects of less pollution, easy separation and purification, and convenient recovery.

Inactive Publication Date: 2009-05-13
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is worth noting that although most of the organic compounds synthesized in the laboratory can effectively adjust the crystal form and morphology of calcium carbonate to obtain organic matter / calcium carbonate particles with an ordered structure, due to the high cost of experiments, they are only suitable for It is obviously not suitable to do basic research and use it as a method for large-scale production of calcium carbonate organic-inorganic composite materials.

Method used

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  • Process for producing monodisperse polymer/calcium carbonate composite fine particle
  • Process for producing monodisperse polymer/calcium carbonate composite fine particle
  • Process for producing monodisperse polymer/calcium carbonate composite fine particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] All glass instruments used in the experiment were pretreated as follows: firstly, they were sonicated in ethanol for 15 minutes, and then removed and rinsed with deionized water. Soak in a mixed solvent of concentrated nitric acid / hydrogen peroxide / water at a volume ratio of 1:1:1 for 2 days, take it out, wash it with acetone, and dry it at room temperature. Prepare 100 milliliters of 5 g / L carboxymethyl cellulose aqueous solution, then add a certain amount of calcium acetate to prepare 0.01 mol / L calcium chloride solution, and adjust the pH of the solution to 8. Cover the beaker containing the solution with aluminum foil, and make 8 pinholes on 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 4 holes with a needle. Then put it into a desiccator with a volume of about 10 liters together with the above-mentioned beaker cont...

Embodiment 2

[0039] The glass instrument processing method is the same as in Example 1. Prepare 100 ml of 0.5 g / L carboxymethyl cellulose aqueous solution, add a certain amount of calcium chloride to prepare 0.01 mol / L calcium chloride solution, adjust the pH of the solution to 7.5, cover the beaker containing the solution with aluminum foil , Prick 8 pinholes on 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 4 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 30±1°C. After reacting for 12 hours, the resulting suspension was centrifuged and washed alternately with water and ethanol three times each. The obtained powder was dried at 50° C. for 12 hours under a vacuum of about 10 Pa. Get the...

Embodiment 3

[0041] The glass instrument processing method is the same as in Example 1. Prepare 100 ml of 1 g / L carboxymethyl cellulose aqueous solution, add a certain amount of calcium chloride to prepare a 0.1 mol / L calcium chloride solution, adjust the pH of the solution to 9, and cover the beaker containing the solution with aluminum foil , Prick 8 pinholes on 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 4 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 each. The obtained powder was dried at 25° C. for 12 hours under the condition of a vacuum of abo...

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Abstract

The invention belongs to the technical field of an organic and inorganic composite material, in particular to a method for preparing monodisperse polymer / calcium carbonate composite particles. The method comprises the following steps: a glass apparatus is pretreated, a polymer solution the concentration of which is between 0.001 and 10 grams per liter is prepared, and 0.001-1 mol / liter calcium salt is added into the polymer solution to prepare a calcium salt / polymer mixture; the mixture stands, the pH value of the mixture is adjusted to between 6 and 13, and 10<1> to 10<3> milliliters of the mixture is taken out and filled into a beaker; a beaker with grinded carbonate is arranged inside a sealing system at a temperature of between 10 and 60 DEG C, and a layer of film is coated on the beaker to control the speed of decomposition and generation of carbon dioxide; a layer of film is coated on a mouth of the beaker which is filled with the mixture, and is provided with a plurality of holes by a pin, and the beaker is placed into the sealing system, reacts for 0.5 hours to 15 days, is taken out for separation of products; and the products are separated and dried to obtain the required products. The raw materials have wide sources and low cost; the solvent adopted has small pollution and no toxic action; and the preparation method is simple and easy to operate, accords with the requirement of green chemistry, and has the potential of large-scale production.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic composite materials, and in particular relates to a preparation method of monodisperse polymer / calcium carbonate composite particles. Background technique [0002] Calcium carbonate is one of the most widely occurring inorganic minerals in nature. On the one hand, as an important inorganic chemical product, calcium carbonate is widely used in building materials, rubber, plastics, coatings, papermaking, daily chemicals and other industries. According to different particle sizes, calcium carbonate can be divided into several categories such as microparticles, micropowder, microfine, ultrafine, and ultrafine, which are used in different industries. On the other hand, as one of the main inorganic components of biominerals, calcium carbonate formed under the induction of organic substrates such as proteins and polysaccharides (such as invertebrate shells) is highly ordered compared to calciu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/21C08L1/00C08K3/26C09C1/02C09C3/10
Inventor 李为武培怡
Owner FUDAN UNIV
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