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Silica-modified terbium complex pet luminescent material and preparation method thereof

A technology of luminescent materials and silicon dioxide, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of poor thermal stability and achieve the effect of maintaining stable mechanical and crystallization properties

Active Publication Date: 2022-03-08
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The rare earth complexes themselves have excellent luminescent properties, but their poor thermal stability limits their applications

Method used

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  • Silica-modified terbium complex pet luminescent material and preparation method thereof
  • Silica-modified terbium complex pet luminescent material and preparation method thereof
  • Silica-modified terbium complex pet luminescent material and preparation method thereof

Examples

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Embodiment 1

[0035] Such as figure 1 As shown, the present invention discloses a method for preparing a silicon dioxide-modified terbium complex PET luminescent material, which includes the following steps:

[0036] First, in nano silicon dioxide (SiO 2 ) on the basis of preparing nano-chloro-silicon spheres:

[0037] Preparation of chlorosilicon spheres: Add nano-silica (about 20-200nm in size, pre-dried for 24 hours in a vacuum oven at 80°C) in a three-necked flask, add benzene to dissolve it, protect it with nitrogen, and pass through Add thionyl chloride dropwise through the liquid funnel, then there will be HCl and SO 2 Generated and reacted at 65°C for 4 hours. Then the reaction mixture was centrifuged at 8000r / min for 15min. And washed three times with benzene, vacuum-dry the obtained chlorosilicon balls, and store them in an airtight container. The mass volume ratio of nano-silica and benzene is 1:8-15g / ml; nano-silica and thionyl chloride The mass volume ratio is 1:6-8g / ml. ...

Embodiment 2

[0054] Experiment purpose and method: In order to study the influence of low-molecular-weight PET-based terbium-complexed hybrid luminescent groups on the luminescent properties of rare earths, this example takes the low-molecular-weight PET-based terbium-complexed hybrid luminescent group solution synthesized in Example 1 as the research object , the research method is: using RF-5301P fluorescence spectrophotometer, a low molecular weight PET-based terbium-complexed hybrid luminescent group solution is tested for fluorescence.

[0055] Such as figure 2 As shown, the emission spectrum of the low-molecular-weight PET-based europium-complexed hybrid luminescent group has an excitation wavelength of 331.07nm and an emission wavelength of 544.02nm. This method successfully prepared two low-molecular-weight PET-based terbium-complexed hybrid luminescent groups , and the introduction of the block polymer does not affect the light-emitting properties of the rare earth ions themselve...

Embodiment 3

[0059] Experimental purpose and method: In order to study nano-silica / LMPET-4G or LMPET-5CG / Phen / Tb 3+ The influence of these two kinds of hybrid luminescent materials on the mechanical properties of industrialized PET polyester crystallization, this embodiment uses the nano-silica / LMPET-4G or LMPET-5CG / Phen / Tb synthesized in embodiment 1 3+ These two hybrid luminescent materials are used as experimental objects to study their influence on the mechanical properties of linear polyester chips. Standard samples were made in the instrument. The melting temperature in the blender is 290°C, and the mold temperature in the injection molding machine is 50°C for pure linear polyester, which is changed to 40°C after adding the low molecular weight PET-based europium-complexed hybrid luminescent group synthesized in Example 1. Co-preparation of synthetic nanosilica / LMPET-4G or LMPET-5CG / Phen / Tb 3+ These two kinds of hybrid luminescent materials were subjected to four groups of samples ...

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Abstract

The invention discloses a silicon dioxide-modified terbium complex PET luminescent material and a preparation method thereof, comprising the following steps: the first step is to prepare nano-chloro-silicon spheres; the second step is to graft nano-chloro-silicon spheres on the surface Glycol (4G) or 1,5-pentanediol (5CG); third step, LMPET‑4G / Phen / Tb 3+ or LMPET‑5CG / Phen / Tb 3+ Preparation; the fourth step, nano-silica / LMPET‑4G / Phen / Tb 3+ or LMPET‑5CG / Phen / Tb 3+ Preparation; the fifth step, the obtained modified two kinds of nano-SiO 2 The terbium complex hybrid material is uniformly dispersed into the PET resin matrix as a nano-nucleation additive, and two PET-based terbium complex hybrid luminescent materials are obtained. The material not only has the luminescence properties of terbium complexes, but also the mechanical and crystallization properties of the PET matrix itself are stable and improved to a certain extent.

Description

technical field [0001] The invention relates to the field of preparation of PET light-emitting materials, in particular to a silica-modified terbium complex PET light-emitting material and a preparation method thereof. Background technique [0002] Rare earth ions have the advantages of high luminous intensity, pure color, high fluorescence efficiency and rich spectral lines. Moreover, the luminous color of rare earth ions has basically nothing to do with the environment in which the rare earth ions are located, and mainly depends on the rare earth ions themselves. Rare earth complexes themselves have excellent luminescent properties, but their poor thermal stability limits their applications. In recent years, people have begun to use various methods to uniformly disperse and compound organic photoactive substances and inorganic substrates at lower temperatures to prepare composite luminescent functional materials that may have the characteristics of organic and inorganic m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/06
Inventor 王瑶李浩唐建国刘继宪黄林军王彦欣王薇邢丽
Owner QINGDAO UNIV
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