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Preparation method and application of composite white carbon black

A technology of white carbon black and concentration, applied in the field of preparation of composite white carbon black, can solve the problems of single function, reduced strength of rubber and plastic, etc., and achieve the effects of simple production process, excellent performance and good economic benefits.

Pending Publication Date: 2021-07-23
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing white carbon black has a single function, and only uses the surface hydroxyl group and physical surface area to form the function of rubber reinforcement or surface matting agent. If the raw material is required to increase the photocatalytic and anti-ultraviolet effects, it must be added to organic materials such as rubber or plastics. Corresponding photocatalyst and UV shielding agent, while reducing the strength of rubber and plastic

Method used

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  • Preparation method and application of composite white carbon black
  • Preparation method and application of composite white carbon black
  • Preparation method and application of composite white carbon black

Examples

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preparation example Construction

[0032] Preparation of Modified Composite Silica

[0033] (1) Preparation process:

[0034] A) configure a certain concentration of sodium silicate or water glass, add a certain amount of surfactant, and start mechanical stirring;

[0035] B) Keep the water glass solution at a constant temperature of 40-100°C in a water bath, continuously mechanically stir, add a certain concentration of TiCl4 solution, and control the adding speed.

[0036] C) After adding TiCl4, add a certain concentration of hydrochloric acid or sulfuric acid, control the adding speed, stop adding when the pH value reaches 9-10, turn off the stirring, and let it stand for a while.

[0037] D) Filter the solution, put the filter cake into a constant temperature solution, control a certain concentration, stir it mechanically for half an hour, and let it stand for a period of time.

[0038] E) Filter and wash with water for more than three times, and spray dry at 450°C to obtain a finished composite powder. ...

Embodiment 1

[0053] 1.1%TiO 2 Preparation of Modified Composite Silica

[0054] SiO 2 Concentration of 1g / L sodium silicate solution 500mL placed in 90 ℃ water bath constant temperature, add a certain amount of surfactant 0.02g (polyethylene glycol 3% sodium dodecylbenzene sulfonate 75% lauric acid 22%), continuous mechanical Stir, add 1g / L TiCl 4 Solution 50mL, control the addition rate to 1mL / min. TiCl 4 After the addition is complete, add sulfuric acid with a concentration of 0.2N, control the addition rate to 1000mL / min, stop the addition when the pH value reaches 9.5, turn off the stirring, and let stand for 1 hour. Filter the solution, put the filter cake into a constant temperature solution at 90°C, use hydrochloric acid to control the pH value to 5, mechanically stir vigorously at 1200r / min for half an hour, and let it stand for 1 hour; filter and wash more than three times, and spray dry at 450°C to obtain a doped 1% TiO 2 Modified composite silica powder.

[0055] 2.1%TiO ...

Embodiment 2

[0061] SiO 2 Concentration 5g / L sodium silicate solution 500mL is placed in 90 ℃ water bath constant temperature, add surfactant 0.03g (polyethylene glycol 3% sodium dodecylbenzene sulfonate 75% lauric acid 22%), continue mechanical stirring, Add 5g / L concentration of TiCl 4 Solution 50mL, control the addition speed 1mL / min. TiCl 4 After the addition is complete, add sulfuric acid with a concentration of 0.2N, control the addition rate to 1000mL / min, stop the addition when the pH value reaches 9.5, turn off the stirring, and let stand for 1 hour. Filter the solution, put the filter cake into a constant temperature solution at 90°C, use hydrochloric acid to control the Ph value to 5, mechanically stir vigorously at 1200r / min for half an hour, and let it stand for 1 hour; filter and wash with water for more than three times, and spray dry at 450°C to obtain a finished composite powder.

[0062] Obtained doped 10% TiO2 modified composite silica powder, oil absorption value 2.6...

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Abstract

The invention provides a preparation method of composite white carbon black, the preparation method comprises the following steps: preparing a sodium silicate solution with a certain concentration, adding a certain amount of surfactant, and stirring; performing water bath constant temperature of 40-100 DEG C on the sodium silicate solution, performing continuous mechanical high-speed stirring, adding a TiCl4 solution with a certain concentration, and controlling the adding speed; and preparing silicon dioxide with high specific surface area by using a precipitation process to coat the coprecipitation core, thereby obtaining the composite white carbon black. According to the invention, silicon dioxide with high specific surface area is prepared by utilizing a carbonization process to coat the coprecipitation core, so that the inner-layer coprecipitation core is protected, and the material is prevented from shelling. The firmness of the material is guaranteed, and compared with sulfuric acid used by a traditional precipitation method for preparing white carbon black, carbon dioxide is less in harmfulness and low in cost. Carbon dioxide is absorbed, and environmental protection is achieved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of composite white carbon black. Background technique [0002] White carbon black is a substitute for carbon black. It is a general term for fine powder or ultrafine particle anhydrous and hydrous silica or silicates. The white carbon black commonly known as hydrated silicic acid (SiO 2 ·nH 2 O), its SiO 2 The content is relatively large (>90%), and the primary particle size is generally 10-40nm. Because the surface contains more hydroxyl groups, it is easy to absorb water and become aggregated fine particles. The melting point of white carbon black is 1750°C, insoluble in water and acid, soluble in strong alkali and hydrofluoric acid. It has good chemical stability, high temperature resistance, non-flammability, large internal surface area, and strong electrical insulation. It is widely used in chemical industry, light industry and other i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01B33/193C08K7/26C08K9/10B01J20/20B01D53/02
CPCC01G23/0536C01B33/193C08K9/10C08K7/26B01J20/20B01D53/02B01D2257/704B01D2257/708C01P2004/82C01P2006/12C01P2006/19C01P2006/60Y02P20/151
Inventor 支歆王雨晴林代程
Owner LIAONING UNIVERSITY
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