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Surface modification method for hollow glass tiny bead and uses thereof

A technology of hollow glass microspheres and surface modification, which is applied in the field of surface modification of thermal insulation fillers to achieve good fluidity, reduce VOC content, and improve heat reflection effects

Inactive Publication Date: 2009-11-11
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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The concentration of 256.25ml is 0.4mol.L -1 Sodium hydroxide aqueous solution and particle size of 10~100μm, specific surface area of ​​0.1~0.7m 2 5g of hollow glass microbeads per g was added to a 1000ml flask, and 0.3ml of aqueous solution of surfactant sodium dodecylbenzene sulfonate with a concentration of 0.1g / ml was added dropwise to the flask, and stirred thoroughly to make hollow glass Microbead suspension; in the state of constant stirring at 60 r / min with an electric stirrer, maintaining the temperature of the reaction system at 60°C, add 256.25ml dropwise to the hollow glass microbead suspension within a 6-hour reaction time at a concentration of 0.1 mol.L -1 The aqueous titanium sulfate solution was added dropwise, and then allowed to stand for 2 hours, filtered, washed until the filtrate was added with 10% aqueous barium chloride solution without white precipitate, and the wet powder was obtained by suction filtration. The wet powder was dried at 100-110...

Embodiment 2

[0047] The concentration of 512.5ml is 0.2mol.L -1 Potassium hydroxide aqueous solution and particle size of 10 ~ 100μm, specific surface area of ​​0.1 ~ 0.7m 2 5g of hollow glass microbeads per g was added into a 2000ml flask, and 0.3ml of aqueous solution of surfactant sodium dodecylbenzenesulfonate with a concentration of 0.1g / ml was added dropwise to the flask, and stirred thoroughly to make hollow glass Microbead suspension; in the state of constant stirring at 60 rpm with an electric stirrer, maintaining the temperature of the reaction system at 40°C, drop 1025ml of the hollow glass microbead suspension into the hollow glass microbead suspension at a concentration of 0.05mol within 8 hours of reaction time .L -1 The titanyl sulfate aqueous solution was added dropwise and left to stand for 2 hours, filtered, washed until the filtrate was added with 15% barium nitrate aqueous solution without white precipitate, and the wet powder was obtained by suction filtration. The w...

Embodiment 3

[0049] The concentration of 768.75ml is 0.2mol.L -1 Sodium hydroxide aqueous solution and particle size of 10~100μm, specific surface area of ​​0.1~0.7m 2 2.5g of hollow glass microbeads per g was added to a 2000ml flask, and 0.1ml of aqueous solution of surfactant sodium dodecylbenzenesulfonate with a concentration of 0.1g / ml was added dropwise to the flask, and stirred thoroughly to make hollow glass beads. Glass microbead suspension; in the state of constant stirring at 60 rpm with an electric stirrer, maintaining the temperature of the reaction system at 40°C, adding 384.38 ml dropwise to the hollow glass microbead suspension within the 8-hour reaction time is: 0.1mol.L -1 The titanium sulfate aqueous solution was added dropwise and left to stand for 2 hours, filtered, washed until there was no white precipitate after adding 15% barium nitrate aqueous solution to the filtrate, and the wet powder was obtained by suction filtration. The wet powder was dried at 100 to 110 °...

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Abstract

The invention provides a method for modifying the surface of hollow glass microspheres, which is to uniformly coat the surface of hollow glass microspheres with a titanium dioxide coating by a titanium salt back-dripping precipitation method, so that the heat insulation performance of hollow glass microspheres is significantly improved. The production process be simplified. The method of the present invention can give full play to the performance characteristics of hollow glass microspheres and titanium dioxide, learn from each other's strengths and complement each other, and produce a synergistic effect, so that the modified hollow glass microspheres have multiple filler functions, and have thermal barrier, heat reflection and photocatalysis at the same time. And other advantages, can meet a variety of different needs. The invention also provides the application of the method in the preparation of heat-insulating coatings.

Description

technical field [0001] The invention relates to a surface modification method of a heat insulating filler, in particular to a surface modification method of hollow glass microspheres, and the application of the method in the field of preparing heat insulating coatings. Background technique [0002] Hollow glass microspheres are thin-walled, sealed glass spherical shells, due to the vacuum or N 2 , CO 2 Therefore, hollow microbeads have the characteristics of light weight, high strength, sound insulation, heat insulation and insulation, and have become an important filler in the fields of building materials, aerospace, electronics, coal, metallurgy and other fields. 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 resins It can be m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/10
Inventor 陈建华陆洪彬李文丹
Owner NANTONG JUREN NEW MATERIAL TECH