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Micron spherical body composed of nano composite calcium carbonate and its preparation method

A nano-calcium carbonate and nano-composite technology, which is applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve problems such as unevenness, irregularity, and easy aggregation, and achieve good mechanical properties.

Inactive Publication Date: 2003-12-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And its particle size is in the nanometer and ultrafine range (that is, below 1 micron), so when it is applied in an organic medium, there are two problems: one is that the particle surface energy is high, it is in a thermodynamically unstable state, and it is easy to aggregate into group
Current Polymer / CaCO 3 Composite materials are generally realized by blending method and emulsion in-situ polymerization method. Due to the production of nanometer ultrafine calcium carbonate powder and polymer / CaCO 3 The preparation of composite materials is separated. Although the surface treatment of nano-ultrafine calcium carbonate and the in-situ polymerization of polymers have been improved, the dispersion and distribution of nano-ultrafine calcium carbonate in polymers are still inhomogeneous and inhomogeneous. Irregular, the interaction between them is also physical, so the real nano-composite has not yet been realized to make the material produce nano-effects

Method used

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  • Micron spherical body composed of nano composite calcium carbonate and its preparation method
  • Micron spherical body composed of nano composite calcium carbonate and its preparation method
  • Micron spherical body composed of nano composite calcium carbonate and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) (Liquid A) styrene-acrylic acid copolymer and Na 2 CO 3 The configuration of the mixed solution (the weight of styrene-acrylic acid copolymer is about 5%, the physical index: the weight average molecular weight is 29600, the relative molar ratio of styrene and acrylic acid is 1.05, and the acid value is 308mgKOH / g; CO 3 2- 10% by weight): In 900 mL of deionized water, add 50 g of styrene-acrylic acid copolymer and 172 g of Na 2 CO 3 Solid, stir and heat to 80-90°C and keep stirring until completely dissolved, then cool to 5°C.

[0026] 2) (B solution) CaCl 2 Solution configuration (about 5mol / L), 140g anhydrous CaCl 2 Add 250mL of deionized water and stir to dissolve it all.

[0027] 3) Preparation of micron spherical nanocomposite calcium carbonate: Pour liquid B continuously and slowly into liquid A which is being stirred, the temperature is controlled at 5°C, the time for adding liquid B is about 10 minutes, and continue to stir and react after adding liquid...

Embodiment 2

[0029] 1) (Liquid A) styrene-acrylic acid copolymer and Na 2CO 3 The configuration of the mixed solution (the weight of styrene-acrylic acid copolymer is about 2.0%, the physical index: the weight average molecular weight is 21300, the relative molar ratio of styrene and acrylic acid is 1.85, and the acid value is 210mgKOH / g; CO 3 2- The weight is about 0.8%): Add 20g of styrene-acrylic acid copolymer to 400mL deionized water and adjust the pH value to 8-10 with NaOH, stir and heat to 70-80°C and keep stirring until completely dissolved, then dissolve in 500mL deionized water Add 11g NaHCO 3 The solid was stirred and dissolved, and the above two solutions were combined, stirred evenly and cooled to 30°C.

[0030] 2) (B solution) CaCl 2 Solution configuration (about 1.35mol / L), 15g anhydrous CaCl 2 Add 100mL of deionized water and stir to completely dissolve.

[0031] 3) Preparation of micron spherical nanocomposite calcium carbonate: Pour liquid B continuously and slowly...

Embodiment 3

[0033] 1) (Liquid A) styrene-acrylic acid copolymer and Na 2 CO 3 The configuration of the mixed solution (the weight of styrene-acrylic acid copolymer is about 0.5%, the physical index: the weight average molecular weight is 14300, the relative molar ratio of styrene and acrylic acid is 2.45, and the acid value is 170mgKOH / g; CO 3 2- The weight is about 1.2%): In 900mL deionized water, add 5.0g styrene-acrylic acid copolymer and 19g (NH 4 ) 2 CO 3 Solid, stir and heat to 60-70°C and keep stirring until completely dissolved, then cool to 40°C

[0034] 2) (B solution) CaCl 2 Solution configuration (about 2mol / L), 24g anhydrous CaCl 2 Add 110mL of deionized water, stir to dissolve all.

[0035] 3) Preparation of micron spherical nanocomposite calcium carbonate: continuously and slowly pour liquid B into stirred liquid A, control the temperature at 40°C, add liquid B for about 20 minutes, and continue to stir and react after adding liquid B After 30 minutes, a white emuls...

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Abstract

A composite calcium carbonate containing micron spheres of nano particles features that under the chemical action of styrene-acrylic acid copolymer the calcium carbonate nanoparticles are collected to form micron-class big particles, which chemically reacts on the aqueous solution containing Ca ions in the carbonic acid radial's aqueous solution containing said copolymer at 5-4 deg.C for 10-30 min to obtain target product.

Description

technical field [0001] The invention relates to a carbonate and a preparation method, in particular to a micron spherical nanocomposite calcium carbonate and a preparation method. Background technique [0002] Precipitated calcium carbonate synthesized by chemical method is widely used as an important industrial filler in industries such as plastics, rubber, paint, paper and ink because of its white color, non-toxicity, low price and easy processing, which not only greatly reduces production costs, but also Brings additional performance to the filled body. Calcium carbonate manufactured by conventional technology only plays the role of increment and filling, and the reinforcing performance is not obvious. With the rapid development of industry and the development and application of special performance materials, special requirements have been put forward for the physical and chemical properties and microstructure of calcium carbonate fillers. Calciu...

Claims

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Application Information

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IPC IPC(8): C09C1/62C09C3/10
Inventor 岳林海
Owner ZHEJIANG UNIV
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