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A kind of black composite silicon dioxide microsphere and preparation method thereof

A technology of composite silicon dioxide and silicon dioxide, which is applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems affecting the display effect of the display, and achieve the advantages of overcoming the defect of always displaying white, good insulation, and high black-and-white contrast Effect

Active Publication Date: 2020-01-31
深圳市大分子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the embodiment of the present invention is to provide a black composite silica microsphere and its preparation method, which solves the technical problem that the existing silica microsphere affects the display effect of the display because it is white

Method used

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  • A kind of black composite silicon dioxide microsphere and preparation method thereof
  • A kind of black composite silicon dioxide microsphere and preparation method thereof
  • A kind of black composite silicon dioxide microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 (the addition of PVP is on the impact of black composite silica microsphere morphology)

[0063] 1) Backflow washing of silica microspheres:

[0064] First, weigh an appropriate amount of silica microspheres and add them into deionized water, and reflux at 110° C. for 2 hours. Then, after replacing the deionized water, the reflux was continued for 2 hours.

[0065] 2) Centrifugal washing of silica microspheres:

[0066] Add silica microspheres and an appropriate amount of deionized water into a centrifuge tube, and perform centrifugal washing by a centrifuge.

[0067] 3) Ultrasonic dispersion of silica microspheres:

[0068] First, add ethanol to the centrifugally washed centrifuge tube for preliminary ultrasonic dispersion. The volume ratio of ethanol to deionized water is 2:1. Then, add a mixed solution of ethanol and a specified amount of PVP, and continue to ultrasonically disperse for 30-40 minutes to obtain a silica microsphere dispersion.

[00...

Embodiment 2

[0090] Embodiment 2 (initiator and styrene, the impact of the addition amount of polystyrene on the black composite silica microsphere morphology)

[0091] 1) Backflow washing of silica microspheres:

[0092] First, weigh an appropriate amount of silica microspheres and add them into deionized water, and reflux at 110° C. for 2 hours. Then, after replacing the deionized water, the reflux was continued for 2 hours.

[0093] 2) Centrifugal washing of silica microspheres:

[0094] Add silica microspheres and an appropriate amount of deionized water into a centrifuge tube, and perform centrifugal washing by a centrifuge.

[0095] 3) Ultrasonic dispersion of silica microspheres:

[0096] First, preliminary ultrasonic dispersion is performed on the silica microspheres washed by centrifugation. Then, add the mixed solution of ethanol and PVP (the adding weight of PVP is 6% of described silica microsphere weight), continue ultrasonic dispersion 30-40 minute,

[0097] A dispersion...

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Abstract

The invention relates to the technical field of liquid crystal materials and particularly relates to black compound silicon dioxide pellets and a preparation method thereof. The method comprises the following steps: obtaining a silicon dioxide pellet dispersion liquid by ultrasonic dispersion; adding an initiator and a monomer, and performing polymerization reaction in preset reaction conditions to obtain silicon dioxide pellets; performing carbonization and heating to obtain carbonized compound pellets; performing ultrasonic dispersion to obtain a carbonized compound pellet dispersion liquid;and adding the initiator and a monomer polymer for polymerization reaction to obtain the black compound silicon dioxide pellets. Black pellets can be obtained by adopting the preparation method disclosed by the invention. On the one hand, the black pellets can have performances similar to those of common white pellets, and are good in insulativity, and thus can be used as an interval material. Onthe other hand, a display screen using the black pellets is higher in black and white contrast, and can overcome the defect that white pellets display white color all the time, and a clear observation effect can be obtained in high light by using the black pellets.

Description

【Technical field】 [0001] The invention relates to the technical field of liquid crystal materials, in particular to a black composite silica microsphere and a preparation method thereof. 【Background technique】 [0002] Since the advent of liquid crystal display, it has developed rapidly with its advantages of stable and non-flickering image, high picture quality, low working voltage, no radiation hazard, light and thin quality, and pure flat large-area display. Therefore, liquid crystal display is gradually replacing traditional fluorescent screens. , has become the mainstream technology of the display screen. [0003] In the field of flat panel display, the thickness of the liquid crystal layer will affect the display clarity of the liquid crystal display. Generally, in order to ensure the thickness of the liquid crystal cell, it is necessary to uniformly disperse polymer microspheres with suitable size, uniform particle size, high compressive strength and elasticity in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/08G02F1/1339
CPCC08F112/08G02F1/13392
Inventor 不公告发明人
Owner 深圳市大分子科技有限公司
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