A polysiloxane-benzoxazine-based luminescent film and its application in uv-led lamps

A technology of luminescent film and benzoxazine, which is applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of complex preparation methods, low molecular weight of polymers, low conversion rate of reactants, etc., and achieve simple and easy synthesis process, The effect of low preparation cost and easy promotion

Inactive Publication Date: 2019-10-01
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation of polysiloxanes containing benzoxazine in the main chain has been reported, the preparation method is relatively complicated and is prepared by the hydrosilylation method. However, this method requires the use of heavy metal catalysts, and the conversion rate of reactants is relatively low. Low, the resulting polymer has a lower molecular weight

Method used

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  • A polysiloxane-benzoxazine-based luminescent film and its application in uv-led lamps
  • A polysiloxane-benzoxazine-based luminescent film and its application in uv-led lamps
  • A polysiloxane-benzoxazine-based luminescent film and its application in uv-led lamps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of polysiloxane-benzoxazine polymer P1:

[0034] Compound aminopropyl disiloxane (5.0mmol), bisphenol A (5.2mmol), paraformaldehyde (20mmol), absolute ethanol (25ml) and toluene (50ml) were added in a 250ml single-necked flask, and refluxed at 110°C After stirring for 48 hours, the solvent was removed by suspension evaporation to obtain polymer P1 with a yield of 94%.

[0035] The above polysiloxane-benzoxazine polymer P1 1 H NMR spectrum see figure 1 , 13 C NMR spectrum see figure 2 , 29 SiNMR spectrum see image 3 .

[0036] The polysiloxane-benzoxazine copolymer P1 described in the present invention has excellent fluorescence performance, and its fluorescence performance is tested by fluorescence spectrum. The main chain of P1 has both Si-O-Si and benzoxazine structures, and can emit blue fluorescence under the excitation of 365nm ultraviolet light.

[0037] The specific test method is as follows: Dissolve a small amount of P1 in toluene to obtai...

Embodiment 2

[0040] The preparation of polysiloxane-benzoxazine-based luminescent film of the present invention:

[0041] Dissolve 2.0g of P1 in toluene to obtain a toluene solution of P1, take 0.001g of Rhodamine-B and add it to the toluene solution of P1, and remove most of the solvent by suspension evaporation to obtain a viscous mixture, which is dropped into polytetrafluoroethylene In the mold, evaporate the remaining solvent at room temperature, and finally place the mold in an oven at 120°C and heat it for 20 minutes, then release the mold to obtain a luminescent film.

Embodiment 3

[0043] The fluorescence spectrum of the polysiloxane-benzoxazine-based luminescent film of the present invention excited by 365nm excitation light

[0044] The organosilicon fluorescent film has excellent fluorescent performance, and its fluorescent performance is tested by fluorescence spectrum. The specific test method is as follows:

[0045] Get the organosilicon fluorescent film prepared in Example 2 and place it in the solid test support, and carry out the fluorescent performance test (λ Ex = 365 nm, slit width: excitation: 10 mm, emission: 5 mm). The fluorescence spectra obtained above are shown in Figure 5 .

[0046]After adding rhodamine-B to P1, an organic silicon luminescent film was obtained. The thin film has strong fluorescence emission at 450nm and 580nm under the excitation of 365nm excitation light, which belongs to the characteristic fluorescence emission of polymer P1 and rhodamine-B. The film exhibits fluorescence emission at 450nm and 580nm under the ...

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Abstract

The invention discloses a novel polysiloxane-benzoxazine-based luminescent film and its application in a UV-LED light. A film matrix is a copolymer of siloxane and benzoxazine. The matrix polymer hasa general chemical formula shown in the description. Rhodamine B as a physical cross-linking site is introduced into the matrix and the film is prepared through a one-pot method. The luminescent filmis easy to prepare and realizes a low cost. The film can emit fluorescence in two wave bands under excitation of different wavelengths of fluorescence and regulation and control of the emission wave bands are realized through changing different excitation wavelengths. The film has a wide application prospect.

Description

technical field [0001] The invention relates to a polysiloxane-benzoxazine-based luminescent film and its application on a UV-LED lamp, belonging to the technical field of polymer material chemistry. Background technique [0002] Silicone materials have the characteristics of high and low temperature resistance, weather resistance, radiation resistance, electrical insulation, physiological inertness, etc., with unique properties and wide applications, which cannot be compared and replaced by other organic polymer materials. The development history of silicone is not too long, but it is developing rapidly on a global scale. Organosilicon materials have been listed as one of the new material industries in the seven high-tech fields by the country. New materials that are indispensable in various fields of the national economy, such as transportation, medical and health, agriculture, and people's daily life, have been widely used and played an important role in the high-tech fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/06C08J3/24C08J5/18C09K11/06C08L61/34
Inventor 林伟英左育静勾志明杨婷新张宇
Owner UNIV OF JINAN
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