Oleophilic modificatioon method for tiny inorganic Nano powder

A micro-nano, inorganic technology, applied in the field of inorganic powder particle modification treatment, can solve problems such as loss of function

Active Publication Date: 2006-12-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the current literature about the surface modification of some hydroxyl-phobic inorganic micro-nano powders, most of the techniques are to directly adsorb the surfactant on the surface of the inorganic powder through physical action. Under the action of mechanical force, it will lose its function and return to non-modified particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Process and steps in the present embodiment are as follows:

[0017] Take 500g of 10% barite slurry (particle size 400-500nm), place the slurry in a high-shear mixing emulsifier with a rotation speed of 5500rpm and disperse for 60 minutes. The dispersing operation is divided into 2 times, during which OP-10 dispersant is added 50g; then the slurry is placed in a three-necked flask in an electronic constant temperature water bath, starts to heat and stir constantly, when the temperature rises to 40°C, add 10ml of titanium tetrachloride solution with a concentration of 10% in the barite slurry, and heat to The reaction temperature is 50°C, while stirring, slowly add 2mol / L NaOH solution dropwise, adjust the pH to 8.5, control the dropwise addition within 60 minutes, and keep warm for 30 minutes after the reaction is completed; then add 5g of dodecylbenzenesulfonic acid Calcium solution, kept at about 75°C for 30 minutes; then the reaction solution was suction filtered, th...

Embodiment 2

[0019] Process and steps in the present embodiment are as follows:

[0020] First take by weighing 200g20% nano magnesium carbonate slurry (particle size 100~200nm), this slurry is placed in the high-shear mixing emulsifier that rotating speed is 5500rpm and disperses for 60 minutes, adds sodium polyacrylate dispersant 50g therebetween; Warming up to 45 ℃, add 10ml of 10% FeCl 3 Solution, slowly add 40ml of NaOH solution with a concentration of 2mol / L dropwise while stirring, adjust the pH to 8.5, and keep warm for 30 minutes after the reaction is completed; then make 5% solution of 5g sodium stearate and add it to the reaction slurry reaction at a temperature of 75°C and kept for 30 minutes; then the reaction solution was suction filtered, and the filter cake was deionized and washed twice, then dried at 110°C, and then pulverized to obtain lipophilic modified magnesium carbonate nanopowder. After testing, the degree of lipophilicity of the prepared modified magnesium carbo...

Embodiment 3

[0022] Process and steps in the present embodiment are as follows:

[0023] First take by weighing 200g20% nano calcium carbonate slurry (particle size 10~50nm), this slurry is placed in the high-shear mixing emulsifier that rotating speed is 5500rpm and disperses for 60 minutes, adds sodium polyacrylate dispersant 50g therebetween; Warming up to 50 ℃, add 15ml concentration of 10% Na 2 SiO 3 Solution, while stirring, slowly drop 40ml of H with a concentration of 1mol / L 2 SO 4 solution, adjust the pH to 4, and keep warm for 30 minutes after the reaction; then make 5g of silane coupling agent into a 5% solution, add it to the reaction slurry, react at a temperature of 75°C, and keep warm for 30 minutes; then The reaction solution was subjected to suction filtration, and the filter cake was deionized and washed twice, then dried at 110° C., and then pulverized to finally obtain lipophilic modified calcium carbonate nanopowder. After testing, the degree of lipophilicity of th...

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PUM

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Abstract

This invention relates to a method for lipophilic modification of inorganic micro / nanopowder. The method comprises: (1) uniformly depositing a layer of inorganic oxide (zirconium oxide, magnesium oxide, aluminum oxide, silicon oxide, titanium oxide, zinc oxide or ferric oxide, 2-5 wt. % of the micro / nanopowder) or its hydrate onto the surface of the micro / nanopowder; (2) coating the composite micro / nanopowder with an organic compound (anionic surfactant, silane coupler, phthalate coupler or aluminum coupler, 3-7 wt. % of the composite micro / nanopowder). The micro / nanopowder is calcium carbonate, barium carbonate, magnesium carbonate, barium sulfate or lead sulfate, or their mixture. The sizes of the micro / nanopowder are in the range of 1-50000 nm. The obtained lipophilic micro / nanopowder can be used to manufacture paints, rubbers and plastics with improved properties.

Description

technical field [0001] The invention relates to a method for lipophilic modification of inorganic micro-nano powder, which belongs to the technical field of modification treatment of inorganic powder particles. Background technique [0002] In recent years, inorganic mineral micro-nano fillers have been widely used in polymer fields such as plastics and rubber. Studies have shown that the application of inorganic micro-nano powders, such as micro-nano barium sulfate and calcium carbonate, in coatings can not only improve Coating adhesion, impact resistance and other mechanical properties, but also improve the coating's radiation resistance and other functions. Applying it to high molecular polymers such as plastics and rubber can not only improve their mechanical functions such as strength and toughness, but also reduce the manufacturing cost of polymers. [0003] Because the compatibility between inorganic micro-nano powder and high molecular polymer and organic medium det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/12
Inventor 施利毅杭建忠李琳琳
Owner SHANGHAI UNIV
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