Surface modification method of hollow glass beads

A hollow glass microbead, surface modification technology, applied in the treatment of dyed low-molecular-weight organic compounds, fibrous fillers, dyed organosilicon compounds, etc. Achieve the effect of reducing energy consumption, short modification time and low cost

Inactive Publication Date: 2012-07-25
BENGBU HUAYANG POWDER TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the wet modification treatment is commonly used, which requires complex equipment and processes, high input costs, long modification time, and further drying is required in the follow-up, which increases energy consumption.

Method used

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  • Surface modification method of hollow glass beads
  • Surface modification method of hollow glass beads
  • Surface modification method of hollow glass beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Take 100g of hollow glass microspheres, wash their surface with absolute ethanol, wash away the surface impurities and dry at 120°C for 3 hours, preheat the mixer to 50°C, add the hollow glass microspheres into the mixer to continue Heat to 95°C, add 0.2g of γ-(2,3-glycidyloxypropoxy)propyltrimethoxysilane (KH560), adjust the speed of the mixer to 600r / min, keep the temperature at 95-105°C and continue stirring for 30min , to obtain modified hollow glass microspheres, then the modified hollow glass microspheres were added to 500g of epoxy resin, stirred, poured into the mold of the casting body, heated and solidified to obtain a sample, and the test results of the mechanical properties of the sample are shown in the table 1.

Embodiment 2

[0025] Example 2: Take 100g of hollow glass microspheres, wash its surface with absolute ethanol, wash away impurities and then dry it at 120°C, preheat the mixer to 60°C, add the hollow glass microspheres into the mixer and continue heating to 135 ℃, add 1.5g titanate coupling agent, adjust the speed to 1200r / min, keep the temperature at 125-135℃ and continue to stir and mix for 10min to obtain modified hollow glass microspheres, and then the modified hollow glass microspheres Add it into 500g of epoxy resin, stir for half an hour, pour it into the mold of the cast body, heat and solidify to obtain a sample, and see Table 1 for the test results of the mechanical properties of the sample.

Embodiment 3

[0026] Example 3: Take 100g of hollow glass microspheres, wash their surface with absolute ethanol, wash away impurities and then dry at 120°C, preheat the mixer to 70°C, add the hollow glass microspheres into the mixer and continue heating to 115°C, add 1.5g of alkyl anionic surfactant, adjust the speed to 900r / min, keep the temperature at 110-120°C and continue stirring and mixing for 20min to obtain modified hollow glass microspheres, and then the modified hollow glass microspheres The beads were added to 500g of epoxy resin, stirred for half an hour, poured into the mold of the cast body, heated and solidified to obtain a sample, and the test results of the mechanical properties of the sample are shown in Table 1.

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Abstract

The invention discloses a surface modification method of hollow glass beads. The method comprises the following steps: firstly, removing surface impurities of the hollow glass beads with absolute ethanol or acetone, and then drying the hollow glass beads for 3 to 5 hours; secondly, adding the dried hollow glass beads into an agitator to be continuously heated after the agitator is preheated, and adding a coupling reagent 0.2-1.5% of the mass of the glass beads after the surface temperature of the hollow glass beads is increased to 95 to 135 DEG C; and thirdly, continuously stirring the hollow glass beads for 10-30min at 95 to 135 DEG C, and then discharging the hollow glass beads to obtain the hollow glass beads with modified surfaces. According to the method, the agitator is adopted to perform dry modification, the technology is simple, the operation is easy, the modification time is short, the cost is low, subsequent drying is not required, and the energy consumption is reduced. The hollow glass beads treated through the method can be better dispersed in epoxy resin, the binding property between the resin and fillers is improved, the material strength is improved, and the mechanical property of the composite material is obviously improved.

Description

technical field [0001] The invention relates to the field of hollow glass microspheres, in particular to a method for surface modification of hollow glass microspheres for better application in resins. Background technique [0002] Hollow glass microsphere is a thin-walled, sealed glass spherical shell, a tiny spherical material containing inert gas. Its main component is borosilicate, which is a hollow particle with unique and stable properties. It has many other properties. Lightweight fillers have incomparable physical and chemical properties. It has the advantages of high melting point, low thermal conductivity, high strength, high dispersion, good electrical insulation and good thermal stability. However, due to the thermal expansion coefficient and melting point of the resin matrix and glass microsphere filler , Density, surface area, etc. are very different, and the compatibility is poor, so it cannot be mixed directly and effectively. In order to obtain a composite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/12C09C3/08
Inventor 彭寿宋在芝王芸苏宪君彭程韩晖王克根彭小波
Owner BENGBU HUAYANG POWDER TECH
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