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Sulfonated polyphenylene ethylene/hydrotalcite composite luminescent ultrathin membrane and preparation method thereof

A technology of sulfonated polyphenylene vinylene and light-emitting film, applied in chemical instruments and methods, light-emitting materials, etc., can solve the problems of high light-emitting brightness, poor stability, short service life, etc., to improve mechanical strength, achieve immobilization, The effect of improving photothermal stability

Inactive Publication Date: 2009-10-21
BEIJING UNIV OF CHEM TECH
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AI Technical Summary

Problems solved by technology

At the same time, it is also beneficial to improve the physical and chemical stability of light-emitting polymers, which is expected to solve practical application problems such as poor stability and short service life in the deviceization of organic light-emitting polymers
Polyphenylene vinylene is an important organic polymer light-emitting material, which has the characteristics of high quantum efficiency and high luminous brightness. However, the research on the assembly of polyphenylene vinylene and hydrotalcite to form ultra-thin films has not been reported so far.

Method used

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  • Sulfonated polyphenylene ethylene/hydrotalcite composite luminescent ultrathin membrane and preparation method thereof
  • Sulfonated polyphenylene ethylene/hydrotalcite composite luminescent ultrathin membrane and preparation method thereof
  • Sulfonated polyphenylene ethylene/hydrotalcite composite luminescent ultrathin membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] 1. Preparation of nitrate hydrotalcite precursor by co-precipitation method:

[0023] a. 0.015mol of solid Mg(NO 3 ) 2 ·6H 2 O and 0.0075mol of solid Al(NO 3 ) 3 9H 2 O dissolved in 50mL to remove CO 2 of deionized water;

[0024] b. Dissolve 0.0625mol NaOH in 50mL to remove CO 2 of deionized water;

[0025] c. the alkali solution prepared by step b is placed in a four-necked bottle, 2 Stir vigorously under the condition of air protection, and at the same time, slowly add the salt solution prepared in step a into the four-necked bottle for about 0.5h. After the addition is completed, adjust the pH value to 8 with 5mol / L NaOH solution , 60 ℃ water bath reaction for 24h, with CO removal 2 The deionized hot water was centrifuged and washed to a pH of about 7, and dried at 70°C for 24 hours to obtain a magnesium-aluminum nitrate hydrotalcite precursor;

[0026] 2. Take 0.1 g of the above-mentioned nitrate hydrotalcite precursor and stir it in 100 ml of formamide ...

Embodiment 2

[0032] 1. Preparation of nitrate hydrotalcite precursor by ion exchange method:

[0033] a. Add 0.01mol of solid Mg(NO3 ) 2 ·6H 2 O and 0.005 mol of solid Al(NO 3 ) 3 9H 2 O and 0.06mol urea were dissolved in 50mL of deionized water, and crystallized in a 90ml polytetrafluoroethylene pressure reaction vessel at 100°C for 12 hours, then centrifugally washed with deionized water until the pH was about 7,70 ℃ drying for 12 hours to obtain carbonate hydrotalcite;

[0034] b. Take 0.3g of the above-mentioned carbonate hydrotalcite and solid NaNO 3 63.75g dissolved in 300mL to remove CO 2 After uniformly dispersed in deionized water, add 1mL of concentrated nitric acid and stir at 25°C under a nitrogen atmosphere to carry out ion exchange reaction for 12 hours and then use 2 The deionized hot water was centrifuged and washed to a pH of about 7, and dried at 70°C for 18 hours to obtain a magnesium-aluminum nitrate hydrotalcite precursor;

[0035] 2. Take 0.1g of the above-me...

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Abstract

The invention discloses a sulfonated polyphenylene ethylene and hydrotalcite composite luminescent ultrathin membrane and a preparation method thereof, which belong to the technical field of organic-inorganic composite luminescent materials. The preparation method comprises the following steps: preparing a hydrotalcite colloidal solution peeled off by a formamide solvent and a dilute aqueous solution of sulfonated polyphenylene ethylene respectively; and performing alternate assembly in the two solutions by using a substrate with negative charges after treatment so as to obtain the sulfonated polyphenylene ethylene and hydrotalcite composite luminescent ultrathin membrane. The prepared ultrathin membrane is formed by the alternate assembly of organic luminescent polymer anions and inorganic hydrotalcite, the preparation process is simple, the ultrathin membrane can be controlled precisely at nanometer scale; and simultaneously, because the two-dimensional confinement effect of a hydrotalcite rigid plywood and the host-guest interaction of the polymer anions, the immobilization of the luminescent polymer sulfonated polyphenylene ethylene is achieved, the photo-thermal stability of the ultrathin membrane is improved effectively, and the fluorescence quenching caused by the aggregation of the polymer luminescent thin membrane is reduced.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic composite luminescent materials, and in particular provides a composite luminescent ultra-thin film of sulfonated polyphenylene vinylene and hydrotalcite and a preparation method thereof. Background technique [0002] Organic photofunctional polymers with conjugated structures have many advantages such as high luminous quantum efficiency, easy preparation, and good flexibility, especially in multi-color and large-screen display and lighting devices (such as organic light-emitting diodes (OLED)) It has broad application prospects and has attracted the attention of scholars from all over the world. Since 1990, when Professor Friend of Cambridge University discovered the electroluminescent properties of polyphenylene vinylene for the first time, there has been a wave of research on light-emitting polymers worldwide. Governments of various countries have also formulated research and develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
Inventor 陆军闫东鹏卫敏段雪
Owner BEIJING UNIV OF CHEM TECH
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