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Method for modifying nano silica

A nano-silica and modification technology, which is applied in the treatment of dyed low-molecular-weight organic compounds, dyed high-molecular organic compounds, fibrous fillers, etc. Good chemical stability, good lipophilic and hydrophobic properties, and good stability

Inactive Publication Date: 2018-09-21
广西高企科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing modification technology cannot effectively solve the technical problems that white carbon black is difficult to disperse and easy to agglomerate, and the modification effect is not good.

Method used

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  • Method for modifying nano silica

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Effect test

Embodiment 1

[0028] A modification method of nano white carbon black, comprising the following steps:

[0029] S1: adding nano-silica to water, stirring and mixing evenly to obtain a nano-silica slurry with a mass concentration of 25%;

[0030] S2: Transport the nano-silica obtained in step S1 to a surface treatment machine, heat it to 70°C, and then add a first surface treatment agent with a weight of 3% nano-silica, and the first surface treatment agent has a mass ratio of 2 : 1 stearic acid and fatty alcohol polyoxyethylene ether sodium sulfate are formed, and at rotating speed, be 150r / min and stir 45min, finish the first surface modification of nano white carbon black;

[0031] S3: dehydrating the nano-silica obtained by modifying step S2, drying in a chain-belt dryer at 80° C., pulverizing, and grading to obtain nano-silica powder;

[0032] S4: Transport the nano-silica obtained in step S3 to a high-speed mixer, control the temperature of the material to 70°C, and then add alkylphen...

Embodiment 2

[0034] A modification method of nano white carbon black, comprising the following steps:

[0035] S1: adding nano-silica to water, stirring and mixing evenly to obtain a nano-silica slurry with a mass concentration of 20%;

[0036] S2: Transport the nano-silica obtained in step S1 to a surface treatment machine, heat it to 60°C, and then add a first surface treatment agent with a weight of 3.5% of the nano-silica, and the first surface treatment agent has a mass ratio of 1 : 1 palmitic acid and fatty alcohol polyoxyethylene ether sodium sulfate are formed, and at rotating speed, be 300r / min and stir 30min, finish the first surface modification of nano white carbon black;

[0037] S3: dehydrating the nano-silica obtained by modifying step S2, drying at 100° C. in a chain-belt dryer, pulverizing, and grading to obtain nano-silica powder;

[0038] S4: Transport the nano-silica obtained in step S3 to a high-speed mixer, control the material temperature to 60°C, and then add alkyl...

Embodiment 3

[0040] A modification method of nano white carbon black, comprising the following steps:

[0041] S1: adding nano-silica to water, stirring and mixing evenly to obtain a nano-silica slurry with a mass concentration of 30%;

[0042] S2: Transport the nano-silica obtained in step S1 to a surface treatment machine, heat it to 75°C, and then add a first surface treatment agent with a weight of 4% nano-silica, and the first surface treatment agent has a mass ratio of 3 :1 lauric acid and fatty alcohol polyoxyethylene ether sodium sulfate are formed, and at rotating speed, be 300r / min and stir 60min, finish the surface modification of nano white carbon black for the first time;

[0043] S3: Dehydrating the nano-silica obtained by modifying step S2, drying in a chain-belt dryer at 90° C., pulverizing, and grading to obtain nano-silica powder;

[0044] S4: Transport the nano-silica obtained in step S3 to a high-speed mixer, control the material temperature to 75°C, and then add alkyl...

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Abstract

The invention discloses a method for modifying nano silica, which comprises the following steps of: adding nano silica into water, and stirring and uniformly mixing to obtain a nano silica slurry; delivering the nano silica to a surface treatment machine, heating to and then adding a first surface treatment agent, the first surface treatment agent described is composed of saturated fatty acid andfatty alcohol polyoxyethylene ether sodium sulfate, stirring to complete the first surface modification of the nano silica; the modified nano silica through dehydration, drying, pulverization and classification to obtain the nano silica powder; then delivering the nano silica to a high-speed mixer, controlling the temperature of the material , adding a second surface treatment agent which is composed of the alkylphenol polyoxyethylene ether sodium sulfate and the acrylic rosin polyoxyethylene sucrose ester , high-speed stirring uniformly, carrying out the discharging and drying , and obtainingthe modified nano silica . The nano silica modified by the method not only has good dispersibility, good stability, but also has excellent weather resistance, oxidation resistance, storage stabilityand processing flow property.

Description

technical field [0001] The invention relates to the technical field of inorganic material modification, in particular to a method for modifying nanometer white carbon black. Background technique [0002] White carbon black is a white, non-toxic, amorphous fine powder. Its SiO2 content is relatively large (> 90%), and the original particle size is generally 10-40nm. Because the surface contains more hydroxyl groups, it is easy to absorb water and become aggregated fine particles. Silica has excellent properties such as porosity, large internal surface area, high dispersibility, light weight, good chemical stability, high temperature resistance, non-combustibility, and good electrical insulation. It is mainly used as a filler for rubber, plastics, synthetic resins and paints, and also as a lubricant and insulating material. In order to improve the compatibility of silica filling materials with polymer matrix, it is often achieved by surface modification. Silica has hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/30C09C3/08C09C3/10
CPCC09C1/309C01P2006/22C01P2006/90
Inventor 梁杰锋于强黄启归
Owner 广西高企科技有限公司
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