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Surface modification method for hollow glass tiny bead and uses thereof

A hollow glass microsphere and surface modification technology, applied in the field of preparation of thermal insulation coatings, the field of surface modification of hollow glass microspheres, to achieve the effect of improving heat reflection effect, optimizing speed and ability, and reducing VOC content

Inactive Publication Date: 2008-10-29
NANTONG JUREN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the research on hollow glass microspheres (see Chinese patents CN97111059.X, CN98100584.5, CN98100583.7, CN200510121422.5, CN99119422.5) is still focused on the production process of hollow glass microspheres and hollow glass microspheres. Beads are directly used as fillers to prepare thermal insulation functional materials; although a small amount of research involves research on the surface modification of hollow glass microspheres (CN200610123961.7, CN200510057369.7), they are only limited to silver plating on the surface of hollow glass microspheres. Used as electromagnetic shielding material

Method used

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  • Surface modification method for hollow glass tiny bead and uses thereof
  • Surface modification method for hollow glass tiny bead and uses thereof
  • Surface modification method for hollow glass tiny bead and uses thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The concentration of 256.25ml is 0.4mol.L -1 Sodium hydroxide aqueous solution with a particle size of 10-100 μm and a specific surface area of ​​0.1-0.7 m 2 Add 5g of hollow glass microspheres per gram into a 1000ml flask, and add dropwise 0.3ml of surfactant sodium dodecylbenzenesulfonate aqueous solution with a concentration of 0.1g / ml in the flask, fully stir to make a hollow glass Microbead suspension; in the state of electric stirrer stirring at a constant speed of 60 rpm, maintain the temperature of the reaction system at 60°C, add 256.25ml dropwise to the hollow glass microsphere suspension within 6 hours of reaction time with a concentration of 0.1 mol.L -1 The aqueous solution of titanium sulfate was allowed to stand for 2 hours after the dropwise addition, filtered, washed until no white precipitate was added to the filtrate with 10% aqueous solution of barium chloride, and filtered with suction to obtain wet powder. Dry the wet powder at 100-110°C for 3 ho...

Embodiment 2

[0047] The concentration of 512.5ml is 0.2mol.L -1 Potassium hydroxide aqueous solution with a particle size of 10-100 μm and a specific surface area of ​​0.1-0.7 m 2 Add 5g of hollow glass microspheres per gram into a 2000ml flask, and add dropwise 0.3ml of surfactant sodium dodecylbenzenesulfonate aqueous solution with a concentration of 0.1g / ml in the flask, fully stir to make hollow glass Microbead suspension: under the state of electric stirrer stirring at a constant speed of 60 rpm, maintain the temperature of the reaction system at 40°C, add 1025ml dropwise to the hollow glass microbead suspension within 8 hours of reaction time with a concentration of 0.05mol .L -1 The titanyl sulfate aqueous solution was left to stand for 2 hours after the dropwise addition, filtered, washed until no white precipitate was added to the filtrate with 15% barium nitrate aqueous solution, and the wet powder was obtained by suction filtration. Dry the wet powder at 100-110°C for 3 hours,...

Embodiment 3

[0049] The concentration of 768.75ml is 0.2mol.L -1 Sodium hydroxide aqueous solution with a particle size of 10-100 μm and a specific surface area of ​​0.1-0.7 m 2 Add 2.5g of hollow glass microspheres / g into a 2000ml flask, and add dropwise 0.1ml of a surfactant sodium dodecylbenzenesulfonate aqueous solution with a concentration of 0.1g / ml in the flask, stir fully, and make a hollow Glass microbead suspension; under the electric stirrer with 60 revolutions / minute constant speed stirring state, the temperature of maintaining reaction system is 40 ℃, in the reaction time of 8 hours, dropwise add the concentration of 384.38ml in this hollow glass microbead suspension to be 0.1mol.L -1 The aqueous solution of titanium sulfate was left to stand for 2 hours after the dropwise addition, filtered, washed until no white precipitate was added to the filtrate with 15% aqueous solution of barium nitrate, and filtered by suction to obtain a wet powder. Dry the wet powder at 100-110°C ...

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Abstract

The invention provides a modification method of a hollow glass microballoon surface. Titanium dioxide coating layers are uniformly clad on the hollow glass microballoon surface by adopting a titanium salt back dripping method, so that the heat insulating property of the hollow glass microballoon can be improved obviously, and the production process is simplified. The method can fully bring into play the characteristics of the hollow glass microballoon and titanium dioxide in performance, make the best of the two and lead to synergistic effect. Therefore, the filling material of the hollow glass microballoon, after being modified, has diverse filling functions and the advantages of heat resistance, heat reflection, photocatalysis etc., so as to meet different needs. The invention also provides the application of the method in the manufacture of head insulating coatings.

Description

technical field [0001] The invention relates to a method for surface modification of heat-insulating fillers, in particular to a method for surface modification of hollow glass microspheres, and the application of the method in the field of preparing heat-insulating coatings. Background technique [0002] Hollow glass microsphere is a thin-walled, sealed glass spherical shell, because its interior is vacuum or N 2 , CO 2 Therefore, hollow microspheres have the characteristics of light weight, high strength, sound insulation, heat insulation, and insulation, and have gradually become important fillers in the fields of building materials, aerospace, electronics, coal, and metallurgy. In the United States, many manufacturers are using hollow glass microspheres to prepare artificial marble, which is light in weight, excellent in impact resistance, and low in cost; in the field of functional plastics and functional coatings, hollow glass microspheres are added to thermosetting r...

Claims

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Application Information

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IPC IPC(8): C04B20/10
Inventor 陈建华陆洪彬李文丹
Owner NANTONG JUREN NEW MATERIAL TECH
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