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Preparation method of calcium carbonate/polymer core-shell structure

A technology of core-shell structure and polymer, which is applied in the field of preparing nano-calcium carbonate/polymer core-shell structure, which can solve the problems that it is difficult to uniformly coat nano-materials, it is difficult to obtain nano-calcium carbonate, and it is prone to empty coating.

Active Publication Date: 2017-09-22
宁波普莱斯帝金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the nano-calcium carbonates prepared in the prior art are micron and sub-micron in size, and it is difficult to obtain nano-calcium carbonate with stable vaterite crystal form.
[0004] The use of polymer-coated calcium carbonate facilitates the modification of the surface of calcium carbonate, and makes the composite material have both the properties of inorganic materials and organic polymers. However, in the prior art, it is difficult to achieve uniform coating when coating nano-materials , it is very easy to appear the phenomenon of empty wrapping

Method used

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  • Preparation method of calcium carbonate/polymer core-shell structure

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Embodiment 1

[0024] 1) Prepare solution a: Dissolve calcium nitrate in deionized water so that the concentration of calcium salt is 1.2mol / L, add diethylene glycol monovinyl ether, the molar ratio of calcium salt to diethylene glycol monovinyl ether 1:1, stir evenly;

[0025] 2) Preparation of solution b: dissolving sodium carbonate in deionized water;

[0026] 3) Dissolve polyethylene glycol in toluene, the mass concentration of polyethylene glycol in toluene is 14%, add solution a, the volume ratio of toluene to solution a is 6:1, stir at 50°C for 1h, cool to room temperature , under ultrasonication, add solution b, ultrasonically react for 15min, the ultrasonic power is 150W, and the molar ratio of calcium ion and carbonate ion in the reaction system is 1:1.1;

[0027] 4) Collect the product, centrifuge and wash;

[0028] 5) The washed product is dispersed in carbon tetrachloride, azobisisoheptanonitrile is added, heated to 70° C. and stirred for 3 hours to obtain a calcium carbonate / ...

Embodiment 2

[0030] 1) Prepare solution a: Dissolve calcium nitrate in deionized water so that the concentration of calcium salt is 1.2mol / L, add diethylene glycol monovinyl ether, the molar ratio of calcium salt to diethylene glycol monovinyl ether 1:0.6, stir evenly;

[0031] 2) Preparation of solution b: dissolving sodium carbonate in deionized water;

[0032] 3) Dissolve polyethylene glycol in toluene, the mass concentration of polyethylene glycol in toluene is 14%, add solution a, the volume ratio of toluene to solution a is 6:1, stir at 50°C for 1h, cool to room temperature , under ultrasonication, add solution b, ultrasonically react for 15min, the ultrasonic power is 150W, and the molar ratio of calcium ion and carbonate ion in the reaction system is 1:1.1;

[0033] 4) Collect the product, centrifuge and wash;

[0034] 5) The washed product is dispersed in carbon tetrachloride, azobisisoheptanonitrile is added, heated to 70° C. and stirred for 3 hours to obtain a calcium carbonat...

Embodiment 3

[0036] 1) Prepare solution a: Dissolve calcium nitrate in deionized water so that the concentration of calcium salt is 1.2mol / L, add diethylene glycol monovinyl ether, the molar ratio of calcium salt to diethylene glycol monovinyl ether 1:1.5, stir evenly;

[0037] 2) Preparation of solution b: dissolving sodium carbonate in deionized water;

[0038] 3) Dissolve polyethylene glycol in toluene, the mass concentration of polyethylene glycol in toluene is 14%, add solution a, the volume ratio of toluene to solution a is 6:1, stir at 50°C for 1h, cool to room temperature , under ultrasonication, add solution b, ultrasonically react for 15min, the ultrasonic power is 150W, and the molar ratio of calcium ion and carbonate ion in the reaction system is 1:1.1;

[0039] 4) Collect the product, centrifuge and wash;

[0040] 5) The washed product is dispersed in carbon tetrachloride, azobisisoheptanonitrile is added, heated to 70° C. and stirred for 3 hours to obtain a calcium carbonat...

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Abstract

The invention relates to a preparation method of a calcium carbonate / polymer core-shell structure. According to the preparation method, diethylene glycol monovinyl ether is used as a crystal form controlling agent, a shape controlling agent and a polymeric monomer and interface reaction of enabling ultrasonic initiation reactants to collide between organic-phase and water-phase liquid drops is carried out to initiate the monomer to polymerize, so that stable vaterite-phase calcium carbonate / polymer nanoparticles with a (100) face are obtained and the particle size is about 200nm to 300nm.

Description

technical field [0001] The invention belongs to the field of preparation of calcium carbonate materials, in particular to a method for preparing nanometer calcium carbonate / polymer core-shell structure. Background technique [0002] Calcium carbonate is widely used in industries such as rubber, plastics, coatings, papermaking, inks, glue dispensing agents, sealants, etc. It can also be used in industries such as toothpaste, food, medicine, word materials, building materials, and chemical fibers. The crystal forms of calcium carbonate include calcite, aragonite, and vaterite. Among them, calcite has the most stable structure, while aragonite and vaterite are both in an unstable state, and it is difficult for vaterite to exist stably. [0003] Nano-calcium carbonate has small particle size and large specific surface area. Compared with ordinary calcium carbonate, it has excellent performance. Nano-calcium carbonate with a particle size of 10-100nm has a reinforcing effect on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F116/18C08F2/44C08K3/26
CPCC08F2/44C08F116/18C08K3/26C08K2003/265C08K2201/011
Inventor 唐洁净
Owner 宁波普莱斯帝金属制品有限公司
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