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Transparent epoxy nano composite material and its preparation method and use

A nano-composite material and nano-composite particle technology are applied in the field of transparent epoxy nano-composite materials and their preparation, which can solve the problems of decreased transmittance in the visible light region, increased viscosity of mixtures, and increased specific surface area of ​​fillers, etc.

Inactive Publication Date: 2007-11-28
广东中科顺威新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this compensation is limited when the prepared material is a thick block, and it is impossible to prepare a nanocomposite with a high filler content. For example, we have prepared a transparent epoxy / ZnO nanocomposite (Polymer, 47( 2006) 2127-2132), when the ZnO content is lower than 0.07%, the addition of fillers has little effect on the visible light transmittance of the composite material, and when the ZnO content exceeds 0.07%, the visible light transmittance drops sharply
In addition, if the particle size of the filler is too small (such as less than 20nm), the specific surface area of ​​the filler will increase sharply, and the agglomeration phenomenon will also intensify. After adding the epoxy prepolymer, the viscosity of the mixture will increase, and the force between the filler and the matrix interface will increase. effect, resulting in severe agglomeration of nanofillers and inability to effectively disperse in the epoxy matrix
These agglomerated particles will cause light scattering in the composite material, resulting in a decrease in the light transmittance of the material

Method used

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  • Transparent epoxy nano composite material and its preparation method and use
  • Transparent epoxy nano composite material and its preparation method and use
  • Transparent epoxy nano composite material and its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Ultrasonic disperse 5 g of spherical silica particles with a particle size of 10 nm in 1 L of methanol solution, and then add 3.6 g (0.2 mol) of H 2 O makes the concentration of water in the solution 0.2mol / L. While stirring, add 6.43g (0.0189mol) butyl titanate (TBOT) to the above solution within 1h, and add 1.36g (0.0756mol) H at the same time 2 O, keep the concentration of water in the solution at 0.2 mol / L, continue to stir the solution for 2 hours to complete the hydrolysis reaction of butyl titanate, and form composite nanoparticles (S-T) coated with titanium dioxide and silicon dioxide.

[0050] Add water and ammonia water to the above solution, so that the concentration of water and ammonia water in the solution reaches 2mol / L and 0.05mol / L respectively. After stirring evenly, add 0.23g (0.0011mol) tetraethyl orthosilicate (TEOS) within 1h to coat the surface of the S-T composite nanoparticles with silicon dioxide. After continuing to stir for 2 hours, centrif...

Embodiment 2

[0053] Ultrasonic disperse 10 g of spherical silica particles with a particle size of 100 nm in 1 L of ethanol solution, and then add 5.4 g (0.3 mol) of H 2 O makes the concentration of water in the solution 0.3mol / L. Under the condition of stirring, 16.16g (0.0475mol) butyl titanate (TBOT) was added to the above solution within 5h, and 3.42g (0.19mol) H 2 O, keep the concentration of water in the solution at 0.3 mol / L, continue to stir the solution for 5 hours to complete the hydrolysis reaction of butyl titanate, and form composite nanoparticles (S-T) coated with titanium dioxide and silicon dioxide.

[0054] Add water and ammonia water to the above solution, so that the concentration of water and ammonia water in the solution reaches 5mol / L and 0.1mol / L respectively. After stirring evenly, 0.98g (0.0047mol) TEOS was added within 2h to coat the surface of the S-T composite nanoparticles with silica. After continuing to stir for 5 hours, centrifuge to obtain a white precipi...

Embodiment 3

[0057] Ultrasonically disperse 20 g of spherical silica particles with a particle size of 1000 nm in 1 L of ethylene glycol solution, and then add 7.2 g (0.4 mol) of H 2 O makes the concentration of water in the solution 0.4mol / L. While stirring, add 41.17g (0.121mol) butyl titanate (TBOT) to the above solution within 10h, and add 8.71g (0.484mol) H at the same time 2 O, keep the concentration of water in the solution at 0.4 mol / L, continue to stir the solution for 10 h to complete the hydrolysis reaction of butyl titanate, and form composite nanoparticles (S-T) coated with titanium dioxide and silicon dioxide.

[0058] Add water and ammoniacal liquor to above-mentioned solution, make the concentration of water and ammoniacal liquor in the solution reach 10mol / L and 0.2mol / L respectively. After stirring evenly, 5.43g (0.026mol) TEOS was added within 5h to coat the surface of the S-T composite nanoparticles with silica. After continuing to stir for 10 h, centrifuge to obtain ...

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Abstract

The present invention relates to one kind of transparent composite epoxy material and its preparation process and use. The transparent composite epoxy material has nanometer composite inorganic stuffing comprising nanometer silica particle serving as core, titania serving as shell coating the silica particle core and outer silica layer coating the titania shell. The transparent composite epoxy material possesses high transparency, excellent ultraviolet ray shielding effect, high ultraviolet ray tolerance, low heat expansion coefficient, high heat conductivity and other advantages, and is suitable for use in pacing LED and other light emitting semiconductor devices.

Description

technical field [0001] The present invention relates to a kind of transparent epoxy nanocomposite material and its preparation method and application, more specifically, the present invention relates to a kind of transparent epoxy nanocomposite material whose filler is the composite nanoparticle with core-shell structure and its preparation method and uses. Background technique [0002] At present, epoxy resins used for electronic packaging such as light emitting diodes (LEDs) are mainly bisphenol A type transparent epoxy resins, and transparent epoxy resins are very mature for digital tube packaging. However, the packaging of LED solid-state lighting devices is different from the packaging of ordinary digital tubes, especially the white LED based on ultraviolet light has higher requirements on various properties of epoxy resin. For example: it is difficult to realize the complete conversion of ultraviolet light to ultraviolet-excited white LEDs, and the impact of a large a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/02C09K3/10
Inventor 付绍云李元庆杨洋
Owner 广东中科顺威新材料科技发展有限公司
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