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A carbon-coated white carbon black

A technology of carbon-coated white carbon black and white carbon black, which is applied in the direction of fibrous fillers, chemical instruments and methods, and inorganic pigment treatment, can solve the problems of weakening the influence of dispersion, and achieve improved compatibility and good economical performance. Benefits, solve the effect of easy reunion

Active Publication Date: 2016-08-24
安徽进化硅纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many studies have been done on the surface modification of silica at home and abroad, but most of the research is limited to weakening the influence of silicon hydroxyl activity on the surface of finished silica particles on dispersion.
[0005] A Chinese patent for the preparation of a starch / silica composite filler, the silica modification method involved is a blending modification method of mixing silica into pre-gelatinized starch paste, the process is simple and easy Realized, but it is only a modification of the finished product of silica, and the coating between starch and silica is simple adsorption

Method used

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  • A carbon-coated white carbon black
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Examples

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Effect test

Embodiment 1

[0055] Add 100g of glutinous rice starch to 900g of water, gelatinize at 80℃ for 1h, take 100g of gelatinized glutinous rice starch solution, mix with 100g of precipitation white carbon black, stir at 50m / min and temperature at 60℃ , Stir uniformly, dry at 105°C to obtain carbon-coated silica, pulverized by a solid pulverizer, and carbonize at 300°C in a tube furnace filled with nitrogen to obtain carbon-coated silica The average particle size is 80nm, the carbon coating layer with 95% carbon content is about 6nm, and the coverage rate of the carbon coating layer is 70%. The mechanical properties are measured after being mixed with rubber according to the specified formula and vulcanized.

Embodiment 2

[0057] Add 100g of tapioca starch to 300g of water, gelatinize at 80℃ for 1h, take 100g of gelatinized tapioca starch solution, mix 100g of fumed white carbon into it, stir at 100m / min and temperature at 70℃ , Stir uniformly, dry at 60°C to obtain carbon-coated silica, pulverized by a solid pulverizer, and carbonize at 400°C in a tube furnace filled with nitrogen to obtain carbon-coated silica The average particle size is 100nm, the carbon coating layer with 96% carbon content is about 10nm, and the carbon coating layer coating rate is 85%. The mechanical properties are measured after being mixed with rubber according to the specified formula and vulcanized.

Embodiment 3

[0059] Add 100g of sucrose to 4900g of water, heat it at 70℃ to fully dissolve it, take 100g of sucrose solution, mix it with 100g of fumed white carbon black, stir evenly at a stirring rate of 120m / min and a temperature of 65℃. Drying at ℃ to obtain carbon-coated white carbon, pulverized by a solid pulverizer, and then carbonized at 500 ℃ in a tube furnace filled with argon to obtain a carbon-coated white carbon with an average particle size of 20nm , The carbon coating layer with 97% carbon content is about 1nm, and the coverage rate of the carbon coating layer is 50%. The mechanical properties are measured after mixing with rubber according to the specified formula and vulcanizing.

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Abstract

The invention relates to a carbon-coated white carbon black. The carbon-coated white carbon black is prepared through the following steps: modifying the white carbon black by using starch, oligosaccharide, glycerinum and polyethylene glycol as raw materials, evenly coating silicon dioxide with a carbon layer, and carbonizing at a high temperature in an insert gas or anaerobic atmosphere to obtain a core-shell structure nano-powder with silicon dioxide as a core and carbon as a shell. Compared with the traditional white carbon black, the carbon-coated white carbon black is covered with a unique carbon coating layer so that the white carbon black has electric conductivity, the structural property of the white carbon black is improved and the compatibility of the white carbon black with rubber is improved, and when the carbon-coated white carbon black is applied to a tire, the tire has the characteristics of improved slippery resistance, low generation of heat by friction and the like. The new material carbon-coated white carbon black has the advantages of simple preparation process and use of simple and easily available raw materials; the prepared carbon-coated white carbon black has excellent properties, meets various performance indexes of the white carbon black for rubber, and thus has good economic benefit.

Description

Technical field [0001] The invention relates to a carbon-coated white carbon black. Specifically, it relates to a method for preparing a novel core-shell structured nano-silica. The method of the invention is simple and efficient, and meets the requirements of energy saving and environmental protection. Background technique [0002] White carbon black is precipitated silica, also known as hydrated silica, and its molecular formula is SiO 2 ·NH 2 O, has a special surface structure (with surface hydroxyl and adsorbed water), special particle shape (small particles, large specific surface area, etc.) and unique physical and chemical properties. Therefore, white carbon black has an important inorganic silicon compound with excellent properties such as porosity, high dispersibility, light weight, good chemical stability, high temperature resistance, non-combustibility, and good electrical insulation. Such characteristics make white carbon black widely used in rubber, plastics, coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/28C09C3/00
Inventor 王益庆沈家锋邓斯奇张立群
Owner 安徽进化硅纳米材料科技有限公司
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