Preparation method of blue light blocking film with adjustable cut-off wavelength and narrow absorption transition band

A technology with cut-off wavelength and narrow absorption, applied in the field of functional polymer composite materials, can solve the problems of complex composition of anti-blue light materials, no anti-blue light blocking rate involved, complicated preparation method, etc., and achieves low cost, few types, and preparation methods. simple effect

Active Publication Date: 2020-02-04
山东济清科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large number of documents have shown that the harmful wavelengths of blue light are concentrated in the wavelength range of 415-455nm, which requires more accurate blocking of blue light; in addition, the anti-blue light material of the invention has complex components and various types, and the preparation method is cumbersome and costly. Higher, and does not involve anti-blue light blocking rate and blocking effect data

Method used

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  • Preparation method of blue light blocking film with adjustable cut-off wavelength and narrow absorption transition band
  • Preparation method of blue light blocking film with adjustable cut-off wavelength and narrow absorption transition band
  • Preparation method of blue light blocking film with adjustable cut-off wavelength and narrow absorption transition band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The preparation method of the CdS nanoparticle of grafting functional monomer IEM, comprises steps as follows:

[0055] Weigh cadmium acetate dihydrate (2.22g, 0.0083mol), thiourea (0.38g, 0.005mol), and mercaptoethanol (1.0g, 0.0128mol), pour it into a 100mL three-necked flask, add 70ml N,N-dimethyl Dimethyl formamide (DMF) was dissolved, magnetically stirred and refluxed at 160°C for 10 minutes under nitrogen protection, the reaction solution was concentrated to 20ml by a rotary evaporator under reduced pressure, and then added dropwise to excess ethanol to precipitate, and the precipitate was washed with ethanol several times. Then vacuum-dried at 30° C. for 24 hours to obtain CdS nanoparticles modified with mercaptoethanol, that is, the surface is rich in hydroxyl groups. According to thermogravimetric analysis, the modified amount of hydroxyl groups on the surface of the hydroxyl-rich CdS nanoparticles is about 4.8wt%.

[0056] Disperse 1 g of CdS nanoparticles wi...

Embodiment 2-15

[0058] The preparation method of CdS nanoparticles grafted with functional monomer IEM is as described in Example 1, the difference is: in the preparation of surface-rich CdS nanoparticles, the reflux reaction time at 160°C is 30min respectively (Example 2) , 60min (Example 3), 90min (Example 4), 2h (Example 5), 3h (Example 6), 4h (Example 7), 4.5h (Example 8), 5h (Example 9) , 6h (Example 10), 7h (Example 11), 7.5h (Example 12), 8h (Example 13), 9h (Example 14), 10h (Example 15); other steps and conditions and implementation Example 1 is consistent.

Embodiment 16-20

[0060] A method for preparing a blue light blocking film with an adjustable cut-off wavelength and a narrow absorption transition band, comprising the following steps:

[0061] (1) Configuration of the polymerization solution: According to the formula in Table 1, the CdS nanoparticles (IEM-CdS) of the grafted functional monomer IEM prepared in Example 4 (160°C reflux reaction time is 90min) were ultrasonically dispersed in the solvent N, In N-dimethylformamide (DMF) and monomer methyl methacrylate (MMA), obtain transparent homogeneous solution, add initiator AIBN (the quality of initiator is 0.5wt% of total monomer mass), ultrasonic dispersion , to obtain a polymerization solution;

[0062] (2) Preparation of the blue light blocking film: use a dropper to absorb the above polymerization solution and drop it into the groove of the lower mold of the flat mold, and press it on the matched upper mold of the mold to ensure that there are no air bubbles inside. The mold was placed ...

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Abstract

The invention provides a preparation method of a blue light blocking film with adjustable cut-off wavelength and narrow absorption transition band. The preparation method comprises the following steps: firstly, preparing CdS nanoparticles rich in hydroxyl on the surface; then, grafting a polymerizable functional monomer isocyanatoethyl methacrylate on the surfaces of the CdS nanoparticles to synthesize polymerizable CdS nanoparticles; and finally, copolymerizing the polymerizable CdS nanoparticles with a polymerization monomer to prepare the blue light blocking film containing the CdS nanoparticles. According to the invention, few types of raw materials are used, the preparation method is simple, steps are short, energy is saved, environment is protected, and cost is low. The CdS nanoparticles in the prepared blue light blocking film are in a highly dispersed state, and the blue light blocking film has the characteristics of high light transmission, blocking of harmful short-wave bluelight, transmission of beneficial long-wave blue light, adjustable cut-off wavelength, narrow absorption transition band and the like.

Description

technical field [0001] The invention relates to a preparation method of a blue light blocking film with adjustable cut-off wavelength and narrow absorption transition band, belonging to the technical field of functional polymer composite materials. Background technique [0002] White light diodes (WLEDs) are usually made of high-intensity blue crystal InGaN and broad-spectrum yellow YAG:Ce 3+ Composed of LED chips, it has the advantages of small size, low heat generation, high efficiency, long life, and remarkable energy saving. It has been widely used in lighting and image display systems. However, WLEDs expose us to greater amounts of UV, indigo, and blue light than conventional light sources, and potential eye damage is of widespread concern. High-energy short-wavelength blue light ranging from 415 nm to 455 nm can generate reactive oxygen species (ROS) to induce oxidative stress, leading to optic nerve damage, visual fatigue, macular degeneration, photoreceptor cell dam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F220/14C08F292/00C08F220/36C08J5/18C08L33/12C08L51/10G02B5/20
CPCC08F285/00C08F292/00C08J5/18G02B5/20C08J2333/12C08J2451/10C08J2351/10C08J2433/12C08F220/14C08F220/34
Inventor 徐金库李欣欣
Owner 山东济清科技服务有限公司
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