Nanometer SiO2 powder dispersion method

A powder material and nano technology, which is applied in the field of dispersion of nano SiO2 powder materials to achieve the effects of improving mechanical properties, convenient operation and reducing modification conditions

Inactive Publication Date: 2006-04-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its specific process method is carried out according to the following steps successively:

Method used

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Embodiment 1

[0013] The first step, inorganic coating: add 1L of nano-SiO with a solid-to-liquid ratio of 50g / L in a reaction kettle with a stirring device and a liquid flow tube 2 Sol, 20ml concentration is 0.03mol / L Al(NO 3 ) 3 9H 2 O is dripped from the liquid flow tube, and the pH value of the reaction solution is adjusted by urea aqueous solution to keep it between 7.5 and 8.0. At a temperature of 75°C, react for 2 hours to make Al(OH) 3 Coated in nano-SiO 2 The particle surface, after the reaction, was first washed with deionized water, then dehydrated with absolute ethanol, and then dried to constant weight at a temperature of 110°C, first washed with deionized water, then dehydrated with absolute ethanol, and then Dry to constant weight at 110°C to obtain surface-coated Al(OH) 3 nano-SiO 2 Powder.

[0014] The second step. Organic modification: first add sodium dodecylbenzenesulfonate (SDBS) with a mass percentage of 0.5% into a reactor with a stirring device, then add a cert...

Embodiment 2

[0016] According to the processing method of embodiment 1, Al(NO 3 ) 3 9H 2 The concentration of O is 0.03 mol / L, and the addition amount of sodium dodecylbenzenesulfonate (SDBS) is 1.0% (wt%).

Embodiment 3

[0018] According to the processing method of embodiment 1, Al(NO 3 ) 3 9H 2 The concentration of O is 0.03 mol / L, and the addition amount of sodium dodecylbenzenesulfonate (SDBS) is 1.5% (wt%).

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Abstract

A process for dispersing SiO2 nano-particles includes such steps as adding nano-class SiO2 sol into reactor, stirring while dripping Al(NO3)3íñ9H2O, regulating pH=7.5-8.0, reaction to coat Al(OH)3 on the surface of SiO2 nano-particle, washing with de-ionized water, drying, dissolving sodium dodecylphenylsulfonate in de-ionized water, adding said coated SiO2 nano-particles, regulating pH=6, and stirring while reacting to obtain Al(OH)3 coated and sodium dodecylphenylsulfonate modified SiO2 nano-particles. It can be used as the functional filler of plastic, rubber, paint, adhesive, etc.

Description

technical field [0001] The invention relates to a method for dispersing nano-powder materials, in particular to surface-coated and modified nano-SiO using aluminum hydroxide / sodium dodecylbenzenesulfonate 2 Dispersion method of powder material. Background technique [0002] nano-SiO 2 It has high surface activity and bonding tendency, but the high surface activity and bonding tendency lead to high surface energy, and the particles are easily agglomerated. In order to improve the nano-SiO 2 For the dispersibility of dispersants, researchers have conducted a lot of research on the dispersants and dispersing methods used. For example, Ou Yuchun et al. used acrylic acid derivatives as surfactants to modify nano-SiO 2 , and then added to the peroxide-containing methyl methacrylate solution, thermally initiated bulk polymerization, to obtain nano-SiO 2 Composite materials; Espiard studies ethyl acrylate in nano-SiO 2 Graft polymerization on surface active sites to obtain nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/08
Inventor 许并社侯文生魏丽乔张颖王淑花贾虎生刘旭光
Owner TAIYUAN UNIV OF TECH
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