Preparation method of modified nano calcium carbonate

A nano-calcium carbonate and modification technology, which is applied in the field of preparation of modified nano-calcium carbonate, can solve the problems of difficulty in uniform dispersion, poor binding force of base materials, and decline in material properties, and achieves improved dispersibility and stability, and improved binding force. Enhanced, easy to disperse effect

Inactive Publication Date: 2016-10-26
ANHUI HUAYU PIPELINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nano-calcium carbonate has more excellent properties than ordinary calcium carbonate, and has four basic effects of nano-materials. However, compared with ordinary calcium carbonate, there are two disadvantages in the direct application of nano-calcium carbonate to organic media: ①The surface of nano-calcium carbonate is affinity Hydrophobic and oleophobic, with strong polarity, it is difficult to disperse evenly in organic media, and the binding force with the base material is poor, which is easy to cause interface defects and lead to material performance degradation; The more, the higher the surface energy, the stronger the adsorption, and in a thermodynamically unstable state, the particles are easy to agglomerate with each other, and cannot be well dispersed in the polymer matrix, thus affecting the actual application effect of nanoparticles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method for modified nano-calcium carbonate, comprising the following steps:

[0016] S1, select 100 parts of nano-calcium carbonate, 3 parts of phosphoric acid ester, 3 parts of sodium stearate, 1 part of sodium dodecylsulfonate according to the mass parts;

[0017] S2. Put the nano-calcium carbonate into the high-speed mixer, heat up and mix, wait until the temperature reaches 100°C, and remove water for 3 minutes;

[0018] S3. Put phosphoric acid ester, sodium stearate, and sodium dodecylsulfonate into the high-speed mixer, control the mixing temperature to 120°C, and activate the nano-calcium carbonate for 10 minutes; the speed of the high-speed mixer is 1000r / min;

[0019] S4. Discharging the activated nano-calcium carbonate into a high-speed mixer at 110° C. and cooling to obtain powdered hydrophobic nano-calcium carbonate with high activation degree and good dispersibility.

Embodiment 2

[0021] A preparation method for modified nano-calcium carbonate, comprising the following steps:

[0022] S1, select 120 parts of nano calcium carbonate, 5 parts of phosphoric acid ester, 5 parts of sodium stearate, 3 parts of sodium dodecylsulfonate according to mass parts;

[0023] S2. Put the nano-calcium carbonate into the high-speed mixer, heat up and mix, wait until the temperature reaches 100°C, and remove water for 5 minutes;

[0024] S3. Put phosphoric acid ester, sodium stearate, and sodium dodecylsulfonate into the high-speed mixer, control the mixing temperature to 150°C, and activate the nano-calcium carbonate for 5 minutes; the speed of the high-speed mixer is 2000r / min;

[0025] S4. Discharging the activated nano-calcium carbonate into a high-speed mixer at 110° C. and cooling to obtain powdered hydrophobic nano-calcium carbonate with high activation degree and good dispersibility.

Embodiment 3

[0027] A preparation method for modified nano-calcium carbonate, comprising the following steps:

[0028] S1, select 110 parts of nano-calcium carbonate, 4 parts of phosphoric acid ester, 4 parts of sodium stearate, 2 parts of sodium lauryl sulfonate according to mass parts;

[0029] S2. Put the nano-calcium carbonate into the high-speed mixer, heat up and mix, wait until the temperature reaches 100°C, and remove water for 4 minutes;

[0030] S3. Put phosphoric acid ester, sodium stearate, and sodium dodecylsulfonate into the high-speed mixer, control the mixing temperature to 140°C, and activate the nano-calcium carbonate for 8 minutes; the speed of the high-speed mixer is 1500r / min;

[0031] S4. Discharging the activated nano-calcium carbonate into a high-speed mixer at 110° C. and cooling to obtain powdered hydrophobic nano-calcium carbonate with high activation degree and good dispersibility.

[0032] The preparation method of the modified nano-calcium carbonate of the pr...

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Abstract

The invention discloses a preparation method of modified nano calcium carbonate. The method comprises the following steps: adding nano calcium carbonate, phosphate, sodium stearate and sodium dodecylsulfate into a high-speed mixer, and carrying out activating treatment on the powdery hydrophobic nano calcium carbonate with high activation degree and favorable dispersity. By using the method, the modified nano calcium carbonate has hydrophobic surface, can be uniformly dispersed in an organic medium, has higher binding force with polymers, has improved dispersity and stability in the polymer matrix, and can be easily dispersed in the resin and rubber.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate production and processing, in particular to a preparation method of modified nanometer calcium carbonate. Background technique [0002] Nano-calcium carbonate refers to calcium carbonate whose size is on the order of nanometers. From the crystal form, it can be divided into spindle, needle, spherical, cubic, chain, etc. It is a new type of ultrafine solid developed in the 1980s. Inorganic chemical materials. Due to the ultra-fine size of nano-calcium carbonate particles, its crystal structure and surface electronic structure have changed, resulting in small size effects, surface and interface effects, quantum size effects, and macroscopic quantum tunneling effects that ordinary calcium carbonate does not have. , Catalyst, light and heat resistance and melting point have superior performance than conventional materials. Compared with ordinary calcium carbonate, it has the following char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/06C08K9/04C08K3/26C08K5/521C08K5/098C08K5/42
CPCC08K13/06C08K3/26C08K5/098C08K5/42C08K5/521C08K9/04C08K2003/265C08K2201/011
Inventor 吴跃强
Owner ANHUI HUAYU PIPELINE MFG
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