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Process for preparing reaction functional macromolecule/Al2O3 nano composite particles

A technology of nanocomposite particles and polymers, which is applied in the field of preparation of reactive functional polymers/Al2O3 nanocomposite particles, which can solve the problem of low grafting rate and grafting efficiency, non-spherical particles are difficult to coat, and the coating layer is easy to fall off and other issues to achieve the effects of improved compatibility, high universality, easy storage and use

Inactive Publication Date: 2005-08-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention is suitable for non-spherical inorganic nanoparticles with high energy performance and unstable surface properties. The method has high universality and can solve the problem that non-spherical particles such as needles are difficult to coat in the past. The problem that the coating layer of coated nanoparticles is easy to fall off during use, the problem of low grafting rate and grafting efficiency in the preparation of grafted nanoparticles, and the problem that it is difficult to realize surface functionalization and the problem of inorganic nanoparticles dispersion problem

Method used

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  • Process for preparing reaction functional macromolecule/Al2O3 nano composite particles
  • Process for preparing reaction functional macromolecule/Al2O3 nano composite particles
  • Process for preparing reaction functional macromolecule/Al2O3 nano composite particles

Examples

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Embodiment 1

[0048] Example 1: The average particle size is 30 ± 5nm, the aspect ratio is 5, and the specific surface area is 180m 2 / g of acicular nano-Al 2 o 3 After dry treatment with 10wt% KH-570 silane coupling agent, weigh 4 parts and add to 100 parts of styrene monomer, stir and ultrasonically disperse evenly. Add 370 parts of deionized water, 50 parts of sodium dodecylsulfonate (SDS) and 6 parts of nonylphenol polyoxyethylene ether (10 parts) in a four-necked bottle equipped with mechanical stirring, reflux condenser, nitrogen protection and thermometer. ), heated to 40°C and stirred to dissolve, then added monomer and Al 2 o 3 mixture. Then, the temperature was raised to 60° C. and 20% of an aqueous initiator solution composed of 0.5 parts of ammonium persulfate (APS) and 75 parts of deionized water was added. After reacting for 8 hours, the remaining initiator solution was added, and the temperature was raised to 80° C. to continue the reaction for 1 hour. Then add 10 parts...

Embodiment 2

[0049] Embodiment 2: The emulsifier SDS among the embodiment 1 is changed into hexadecyltrimethylammonium bromide, and consumption increases to 65 parts, monomer and Al 2 o 3 The mixture was added to the system at 50°C, and all the other formulations were the same as in Example 1. The yield, grafting rate and grafting efficiency of the obtained product are 93.6%, 2321% and 91.3% respectively, and the particle size distribution is 40-50nm.

Embodiment 3

[0050] Embodiment 3: The emulsifier SDS is changed into octylphenol polyoxyethylene ether (20), the consumption is reduced to 45 parts, and the glycidyl methacrylate is increased to 20 parts. All the other formulas and steps are the same as in Example 1. The yield, grafting rate and grafting efficiency of the obtained product are 88.5%, 2218% and 90.7% respectively, and the particle size distribution is 60-70nm.

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Abstract

Nanometer alumina particle, coupling agent, olefin monomer and active functional group containing olefin monomer as material are made to polymerized in micro emulsion or micro suspension with water medium to prepare nanometer composite functional polymer / alumina particle. The product has the structure with nanometer alumina as core, organic olefin polymer as shell and active functional group on the surface of the shell. The particles have shells connected via chemical bond, particle size smaller than 100 nm and surface functional groups with very high chemical reaction activity. The present invention is suitable for various kinds of inorganic nanometer particles in different shapes and surface properties, and has excellent application foreground in nanometer technology.

Description

technical field [0001] The reactive functional polymer / Al involved in the present invention 2 o 3 The invention relates to a method for preparing nanocomposite particles, which belongs to the technical field of polymer materials. Background technique [0002] In recent years, more and more nanocomposite technologies have been introduced in the field of polymer materials, and researchers often use various inorganic powders including SiO 2 、Al 2 o 3 , ZnO, TiO 2 Wait to carry out filling modification on the polymer material matrix. However, since the powder itself is an inorganic substance and the filled material is an organic polymer, the compatibility between the two is poor, which leads to poor dispersion of inorganic powder particles in the matrix and weak interfacial interaction. , so the filling effect is also very limited. The preparation technology of polymer / inorganic powder nanocomposites can make the product have the characteristics of both inorganic nanopart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/18C08F2/44C08F12/08C08F14/06C08F20/10C08F20/44C08K3/22C08L27/06
Inventor 于建曾重郭朝霞
Owner TSINGHUA UNIV
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