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Silicon dioxide modified carbon dot fluorescent powder and fluorescent silicone rubber

A silicon dioxide and phosphor technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of polluted environment, high price, harmful to human body, etc., achieve excellent fluorescence performance, improve thermal stability and anti-aging performance, Simple and quick preparation method

Active Publication Date: 2018-02-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previously reported fluorescent rubber literature, it was found that although rare earth phosphors have good fluorescent properties, they are expensive; organic fluorescent small molecules often contain benzene rings and naphthalene rings, and ZnS phosphors contain sulfur, which are harmful to the human body and pollute the environment.

Method used

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  • Silicon dioxide modified carbon dot fluorescent powder and fluorescent silicone rubber
  • Silicon dioxide modified carbon dot fluorescent powder and fluorescent silicone rubber
  • Silicon dioxide modified carbon dot fluorescent powder and fluorescent silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a carbon dot phosphor modified by silica, which is prepared by the following steps:

[0030] Dissolve 4.8g of WL-180 type silicon dioxide in 100ml of deionized water, stir evenly to obtain a silicon dioxide suspension, and set aside; take 0.5g of citric acid, 10ml of KH792, and 140ml of deionized water, mix and stir for 30min, and then add the aforementioned two The silicon oxide suspension was stirred for 30 minutes to obtain a mixed solution; the mixed solution was put into a tetrafluoroethylene reactor, heated to 180°C under vacuum, and after 6 hours of reaction, centrifuged 3 times with deionized water at a speed of 8000r / min time 10min, then vacuum dry.

Embodiment 2

[0032] This embodiment provides a carbon dot phosphor modified by silica, which is prepared by the following steps:

[0033] Dissolve 3g of WL-180 type silica in 100ml of deionized water, stir well to obtain a silica suspension, and set aside; take 0.1g of citric acid, 5ml of KH792, and 140ml of deionized water, mix and stir for 30min, then add the aforementioned silica Stir the silicon suspension for 30 minutes to obtain a mixed solution; put the mixed solution into a tetrafluoroethylene reactor, heat it to 150°C under vacuum, react for 3 hours, and centrifuge 3 times with deionized water at a speed of 8000r / The min time is 10min, and it is vacuum-dried.

Embodiment 3

[0035] This embodiment provides a carbon dot phosphor modified by silica, which is prepared by the following steps:

[0036] Dissolve 6g of WL-180 silicon dioxide in 100ml of deionized water, stir well to obtain a silicon dioxide suspension, and set aside; take 2g of citric acid, 15ml of KH792, and 140ml of deionized water, mix and stir for 30min, then add the aforementioned silicon dioxide The suspension was stirred for 30 minutes to obtain a mixed solution; the mixed solution was put into a tetrafluoroethylene reactor, heated to 200°C under vacuum, and after 12 hours of reaction, centrifuged 3 times with deionized water at a speed of 8000r / min The time is 10 minutes, and vacuum drying is obtained.

[0037] The silica-modified carbon-dot phosphors provided in Examples 1 to 3 above are all white powders with strong fluorescent effects; among them, the fluorescent effect and particle size uniformity of the carbon-dot phosphors provided in Example 1 optimal. The transmission e...

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Abstract

The invention relates to silicon dioxide modified carbon dot fluorescent powder which is prepared from raw materials comprising citric acid, a silane coupling agent KH792 and silicon dioxide in a vacuum heating condition. The invention also provides an application of the silicon dioxide modified carbon dot fluorescent powder in preparing fluorescent silicone rubber and the fluorescent silicone rubber prepared from the silicon dioxide modified carbon dot fluorescent powder. The fluorescent silicone rubber is prepared by the following step of fully mixing and vulcanizing the raw materials of thecarbon dot fluorescent powder, the silicon rubber, silicon dioxide, hydroxyl silicone oil and DMDBH. The preparation method of the silicon dioxide modified carbon dot fluorescent powder provided by the invention is simple and rapid and green and environment-friendly. The silicon dioxide modified carbon dot fluorescent powder is applied to silicone rubber, so that the silicone rubber has an excellent fluorescent performance, and the heat stability and the ageing resistance of the silicone rubber are improved.

Description

technical field [0001] The invention relates to a silica-modified carbon-dot fluorescent powder and a fluorescent functional silicone rubber material prepared as a silicone rubber filler. Background technique [0002] Fluorescent rubber is a functional polymer material based on rubber elastic body, which is endowed with fluorescent properties by physical or chemical means, so that it has both fluorescent properties and mechanical properties. After processing, it can be applied to fluorescent display, paint, rubber industry, night lighting and other fields. At this stage, fluorescent rubber is mostly prepared with rare earth phosphors, organic small molecule fluorescent substances and traditional long-lasting phosphors (mainly ZnS) as fillers. Patent CN106525786A discloses a self-made rare earth-doped silica phosphor as a filler, and adopts rubber composite material processing technologies such as banburying and vulcanization to prepare a fluorescent functional silicone rubb...

Claims

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Application Information

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IPC IPC(8): C08K13/06C08K9/06C08K3/36C08K3/04C08L83/04C08L83/06C09K11/02C09K11/65
Inventor 毛立新张晴晴岳冬梅伊钟毓陈晓平张立群
Owner BEIJING UNIV OF CHEM TECH
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