A kind of preparation method and application of modified nano-calcium carbonate for rubber

A nano-calcium carbonate, modification technology, applied in nanotechnology, calcium carbonate/strontium/barium, nanotechnology, etc. for materials and surface science, can solve the problem of small particle size, poor dispersion and compatibility of nano-calcium carbonate Insufficient and other problems, to achieve the effect of improving compatibility, promoting crystallization, and improving dispersion performance

Active Publication Date: 2022-06-17
都安春旭新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small particle size of nano-calcium carbonate, high specific surface area and surface energy, the compatibility with rubber compounds is insufficient, and there are defects of poor dispersion, which in turn affects the reinforcing effect of nano-calcium carbonate.

Method used

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  • A kind of preparation method and application of modified nano-calcium carbonate for rubber

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Experimental program
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Effect test

Embodiment 1

[0023] A kind of preparation method of modified nano calcium carbonate for rubber, it comprises the following steps:

[0024] (1) Take chlorella protein and deionized water and mix them evenly according to the mass ratio of 1:3, then add citric acid to adjust the pH value to 5, and then add protease and heat to 55 °C for 3 hours under stirring conditions to obtain a mixed solution A is for subsequent use; the ratio of the addition of the protease to the mass of the chlorella protein is 1500U:1g;

[0025] (2) Mix high-purity calcium oxide and deionized water with a mass ratio of 1:3 under stirring conditions at a speed of 300 r / min to obtain slurry A, pass the slurry A through a 100-mesh sieve, and filter and remove the slag. Then add 15 times the mass of deionized water to slurry A to dilute to obtain slurry B, then add mixed solution A obtained in step (1) to slurry B, heat to 85°C, and stir at constant temperature for 1.5h Slurry C is obtained; the mass ratio of the added a...

Embodiment 2

[0032] A kind of preparation method of modified nano calcium carbonate for rubber, it comprises the following steps:

[0033] (1) Take chlorella protein and deionized water and mix them evenly according to the mass ratio of 1:4, then add citric acid to adjust the pH value to 5.5, and then add protease and heat to 60 °C under stirring for 2.5 hours at a constant temperature to obtain mixing Liquid A is for subsequent use; the ratio of the addition of the protease to the quality of the chlorella protein is 1300U: 1g;

[0034](2) Mix high-purity calcium oxide and deionized water with a mass ratio of 1:4 under stirring conditions at a speed of 350 r / min to obtain slurry A, pass the slurry A through a 100-mesh sieve, and filter and remove the slag. Then, deionized water with 13 times the mass of slurry A was added to slurry A to dilute to obtain slurry B, and then mixed solution A obtained in step (1) was added to slurry B, heated to 80 °C, and stirred at constant temperature for 1...

Embodiment 3

[0041] A kind of preparation method of modified nano calcium carbonate for rubber, it comprises the following steps:

[0042] (1) Take chlorella protein and deionized water and mix them evenly according to the mass ratio of 1:2, then add citric acid to adjust the pH value to 6, then add protease and heat to 50 °C for 2 hours under stirring conditions to obtain a mixed solution A is for subsequent use; the ratio of the addition of the protease to the mass of the chlorella protein is 1200U:1g;

[0043] (2) Mix high-purity calcium oxide and deionized water with a mass ratio of 1:5 under stirring conditions at a speed of 400 r / min to obtain slurry A, pass the slurry A through a 100-mesh sieve, and filter and remove slag. Then, 14 times the mass of slurry A was added to slurry A to dilute with deionized water to obtain slurry B. Then, mixed solution A obtained in step (1) was added to slurry B, heated to 90°C, and stirred at constant temperature for 2 hours to obtain slurry B. Slu...

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Abstract

The invention discloses a method for preparing modified nano-calcium carbonate for rubber. Firstly, chlorella protein and deionized water are mixed evenly in proportion, then citric acid is added to adjust the pH value, and then protease is added and heated under stirring conditions to obtain The mixed solution A is set aside; then the high-purity calcium oxide and deionized water are stirred and mixed in proportion to obtain the slurry A, and then the mixed solution A is added after adding deionized water for dilution, heated and stirred to obtain the slurry C; then passed through the slurry C Add carbon dioxide for carbonization reaction, then press filter the slurry obtained after carbonization to obtain a precipitate, dry and pulverize the precipitate to obtain nano-calcium carbonate powder; then add the nano-calcium carbonate powder to a high-speed mixer, heat and add a modifier Continue to stir to obtain modified nano-calcium carbonate. The modified nano-calcium carbonate with good dispersibility and good compatibility with the rubber compound can be obtained by the method of the invention, and can be used to produce high-quality rubber materials.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method and application of modified nanometer calcium carbonate for rubber. Background technique [0002] Calcium carbonate is an inorganic compound, commonly known as limestone, limestone, stone powder, marble, etc. Calcium carbonate is neutral, basically insoluble in water, and soluble in hydrochloric acid. Because of its high quality and low price, it is widely used in rubber, paper, ink, paint, plastic, sealing adhesive materials and other fields. There is no reinforcing effect, and even the mechanical properties of the vulcanizate will be reduced, but the superfine calcium bicarbonate has a certain reinforcing effect, which can improve the mechanical properties of the vulcanizate, is easy to disperse in the rubber compound, and can also improve the processing performance. It can be considered as semi-reinforcing Strong filler; nano-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K9/04C08K3/26C08K3/22C08K13/06C08L83/04C01F11/18B82Y40/00B82Y30/00
CPCC08K9/10C08K9/04C08K9/08C08K3/26C08L83/04C01F11/183C01F11/181C01F11/185B82Y40/00B82Y30/00C08K2201/011C08K2201/003C08K2201/006C08K2003/265C08K2003/2241C08L2205/025C08K3/22C08K13/06
Inventor 韦明
Owner 都安春旭新材料科技有限责任公司
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