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Method for preparing polymer/inorganic nano composite material powder initiated by nano semiconductor

A nano-semiconductor, inorganic nano-technology, applied in the field of preparing polymer/inorganic nano-composite materials, can solve problems such as difficulty in agglomeration of nanoparticles, and achieve the effect of improving dispersion performance

Inactive Publication Date: 2005-06-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is simple and easy to implement, but it is difficult to solve the agglomeration of nanoparticles

Method used

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  • Method for preparing polymer/inorganic nano composite material powder initiated by nano semiconductor
  • Method for preparing polymer/inorganic nano composite material powder initiated by nano semiconductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh the methyl methacrylate monomer, add deionized water to the mark, and prepare a monomer solution with a concentration of 12 g / L. The nano titanium dioxide (anatase type) powder is added to the methyl methacrylate aqueous solution, and the dispersion concentration of the titanium dioxide is 1 g / L. Then, an aqueous solution of copper nitrate was added to make the concentration of copper nitrate in the reaction system 0.01 mol / L. Continuously disperse with ultrasonic for 10 minutes to make the nanoparticles uniformly dispersed. The above-mentioned reaction liquid was added to the reactor, and after stirring for 10 minutes, the high-pressure mercury lamp placed outside the reactor was turned on, and the saturated copper sulfate aqueous solution was circulated through the jacket of the reactor. At the center of the reactor, the radiation intensity of 365 nm wavelength is 12 mw / cm 2 . The polymerization reaction lasted 300 minutes.

[0039] The product is a white powder pre...

Embodiment 2

[0041] The dosage of nanometer titanium dioxide is 0.2 g / L, and other conditions and experimental procedures are the same as in Example 1. Polymerize for 350 minutes. The product was a white precipitated powder, and the observation result of the electron microscope was the same as that of Example 1.

Embodiment 3

[0043] A 10 g / L pyrrole aqueous solution was prepared, and the dispersion concentration of nano-titanium dioxide was 1 g / L. The other conditions are the same as in Example 1. The reaction time is 280 minutes. Thirty minutes after the start of the reaction, a black precipitate appeared. Infrared spectroscopy analysis confirmed that the product contained polypyrrole and titanium dioxide. The electron microscope observed that the nano titanium dioxide particles were wrapped by the black polypyrrole produced.

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Abstract

The invention belongs to high molecular material technical field, concretely a method to prepare polymer / inorganic nm compound material powder. The polymerization system compares of: (A) active semi-conductor powder of nm size, (B) free radical monomer containing one or more couple bond, (C) reaction reaction adjusting agent (D) dispersion medium water. The system can make polymerization shot by the ultraviolet ray whose wave length is 300-400nm, then generate the polymer inorganic compound material powder of nm size. In the invention, the synthesizing reaction and material compound are completely in the same time, so it is especially suitable for preparing high molecular compound material with inorganic semi-conductor in it, as well as other compound materials like photovoltaic conversion, plastic procession makeup or coating.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and is a method for preparing a polymer / inorganic nano composite material, and specifically relates to a method for preparing a polymer / inorganic nano composite material by using light to excite a nano semiconductor to initiate a polymerization reaction. Background technique [0002] The polymer / inorganic nanocomposite material is a composite material formed by dispersing inorganic nanostructure units in a polymer matrix. Due to the combination of the advantages of polymers and inorganic nanoparticles, and the economical and effective use of the unique properties of nanometers, such as photoelectric, thermal and magnetic properties, polymer nanocomposites have become important new materials. [0003] There are several methods for preparing polymer / inorganic nanocomposites reported so far: [0004] 1. Encapsulation polymerization method: Carry out monomer grafting or surface treatment on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/38C08F2/48C08F20/00C08K3/22C08L33/00
Inventor 倪秀元董嶒翁臻
Owner FUDAN UNIV
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