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Surface functionalized nano-particle and method for preparing its polymer nanometre composite material

A technology of surface functionalization and nano-particles, applied in chemical instruments and methods, luminescent materials, material inspection products, etc., can solve the problems of photophysical property degradation, opacity of composite materials, easy aggregation of nanoparticles, etc., and achieve good mechanical properties and The effect of thermal stability

Inactive Publication Date: 2009-01-14
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, in order to realize the further application of these functional nanoparticles, it is equally important to introduce them into polymers to form nanocomposites through various advanced composite and assembly technologies, but the small size effect and high specific surface of nanoparticles will lead to Particles are easy to agglomerate, resulting in opaque and reduced photophysical properties of the final composite material (Adv.Mater., 2006, 18, 1188; Macromolecules, 2007, 40, 1089; J.Colloid Interf.Sci., 2008, 323, 84)

Method used

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  • Surface functionalized nano-particle and method for preparing its polymer nanometre composite material
  • Surface functionalized nano-particle and method for preparing its polymer nanometre composite material
  • Surface functionalized nano-particle and method for preparing its polymer nanometre composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1. Synthesis of ZnS composite nanoparticles functionalized with o-phenanthroline:

[0026] 5.1 g of thioacetamide, 16.5 g of zinc acetate and 8.0 mL of mercaptoethanol were dissolved in 150 mL of dimethylformamide (DMF). The reaction solution was heated at 70° C. for 6 h under nitrogen protection. The reaction solution was precipitated in ethanol, centrifuged, washed three times with absolute ethanol, and dried under vacuum at room temperature to finally obtain white ZnS nanoparticles. Get 1.0g of ZnS nanoparticles obtained above and disperse them in 25mL DMF (1), dissolve 0.02g o-phenanthroline in 5mL DMF (2), then add the solution (2) dropwise to the solution (1), and control the rate of addition to 0.5 mL / min, the mixed solution was reacted at 45°C for 10h. Then cool to room temperature, add a large amount of ethanol for precipitation, centrifuge, ultrasonically wash three times with absolute ethanol, wash once with ether, and vacuum-dry at room temperature to fina...

Embodiment 2

[0033] 1. Synthesis of ZnS composite nanoparticles functionalized with 5-aminophenanthroline:

[0034] The synthetic method is the same as described in Example 1, and the only difference is to replace o-phenanthroline with 5-amino-phenanthroline;

[0035] 2. Preparation of ZnS composite nanoparticle / polymer bulk material:

[0036] Add 0.5g of ZnS composite nanoparticles to 10g of mixed monomers of styrene and dimethylacrylamide (the weight ratio is 1:1), disperse into a uniform and transparent solution by ultrasonic oscillation at 50°C, and then add 0.4% AIBN initiator , Seal, degas, fully remove the gas in the system and pour the liquid into the glass mold. Polymerization conditions: polymerize at 40°C for 12 hours, program temperature rise, increase temperature by 10°C every 1 hour, and finally heat-treat at 120°C for 4 hours. The ZnS composite nanoparticle / polymer transparent optical bulk phase material can be obtained after demoulding. In this nano-composite phase mater...

Embodiment 3

[0038] 1. The method for synthesizing 5-amino-phenanthroline functionalized ZnS composite nanoparticles is as described in Example 2;

[0039] 2. Preparation of ZnS composite nanoparticle / polymer bulk material:

[0040] 0.5 g of ZnS composite nanoparticles were dispersed into 10 g of mixed monomers of dimethylacrylamide and styrene (weight ratio 1.5:1) under the action of ultrasonic waves, and then 0.2 g of acrylic acid and 0.25 wt % BPO were added. After sealing, degassing, and fully removing the gas in the system, pour the liquid into the glass mold. Polymerize at 60°C for 6 hours, program temperature rise, increase the temperature by 10°C every hour, and finally heat-treat at 150°C for 2 hours. The ZnS composite nanoparticle / polymer transparent optical bulk phase material can be obtained after demolding. The bulk material exhibits better fluorescence emission properties around 540nm.

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Abstract

The invention relates to nanometer particle surface functionalization and the preparation method of the transparent polymer nanometer composite material, which belongs to the chemical material field. The functionalization for the surface of the nanometer particles can be performed by using an organic small molecule with a nitrogen-containing function (eg. 8-hydroxy quinoline and phenanthroline derivative) though a method of ligand exchanging or direct situ decorating. The functional nanometer particles can be coated directly during the synthetic process or synthetized through ligand exchanging later, and the nanometer particles have a good fluorescence property. The functionalized nanometer particles and the polymer are compounded for preparing the transparent polymer nanometer composite material through a solution co-blending method and a situ bulk polymerization method. The method for functionalizing nanometer particle integrate the functions of organic functional molecules and the functions of nanometer particles into one, and a novel approach for constructing novel functional nanometer particles is provided. The prepared functional nanometer particles / polymer composites material have important application value in the fields, such as photoelectric apparatus, display devices and solar batteries, and the like.

Description

technical field [0001] The invention relates to the surface functionalization of nanoparticles and the preparation method of transparent polymer nanocomposite materials. Specifically, it refers to the use of nitrogen-containing functional organic small molecules or polymers to functionalize the surface of nanoparticles by ligand exchange or direct in-situ modification, and to functionalize the functionalized nanoparticles by solution blending and in-situ bulk polymerization. Microparticles are combined with polymers to prepare transparent nanocomposites. Background technique [0002] The quantum size effect of inorganic semiconductor nanoparticles leads to different chemical, physical, optical and magnetic properties of nanomaterials than bulk materials. In particular, its luminescent properties strongly depend on the size of the particles, which provides an effective way to regulate the luminescent properties of inorganic semiconductor particles. The luminescent propertie...

Claims

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Application Information

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IPC IPC(8): C09K11/02G01N33/52C08L33/04C08L33/26C08L75/04C08K9/04C08J5/18C08F20/06C08F20/32C08F20/10C08F2/44C08G18/08C08F20/54C08F12/08H01L51/46
Inventor 吕长利高俊芳史永利
Owner NORTHEAST NORMAL UNIVERSITY
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