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Method for mfg. controllable structure inorganic nanoparticle/polymer composite superthin film

An inorganic nano- and ultra-thin film technology, which is applied in the field of preparation of inorganic nano-particles/polymer composite films, can solve the problems of poor compatibility between inorganic nanoparticles and organic polymer materials, harsh reaction conditions, and high energy consumption. The effects of uniform and controllable free radical polymerization, enhanced binding force and uniform dispersion

Inactive Publication Date: 2003-03-12
JILIN UNIV
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  • Application Information

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Problems solved by technology

Although the LB film method is easy to operate and low in cost, the composite film prepared by this method has many defects and poor chemical and thermal stability; although the LbL assembly method can make up for the shortcomings of the LB film method to a certain extent, the composite film prepared by this method has many defects. Composite films still cannot solve the shortcomings of poor chemical and thermal stability, and the doped inorganic nanoparticles often aggregate; the chemical deposition method requires high equipment, harsh reaction conditions, and high energy consumption; the disadvantage of the suspension coating method is that the inorganic nanoparticles and Poor compatibility with organic polymer materials
In addition, the composite film prepared by the above four methods has weak bonding force with the substrate, which makes the film layer easy to fall off, and these four methods are difficult to directly process the cross-linked polymer material with high mechanical strength into film material

Method used

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  • Method for mfg. controllable structure inorganic nanoparticle/polymer composite superthin film
  • Method for mfg. controllable structure inorganic nanoparticle/polymer composite superthin film
  • Method for mfg. controllable structure inorganic nanoparticle/polymer composite superthin film

Examples

Experimental program
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Effect test

Embodiment 1-2

[0030] Synthesis of α-zinc methacrylate

[0031] Add 89ml of α-methacrylic acid in 120ml of aqueous solution into a three-neck flask equipped with a reflux condensing device and a mechanical stirrer, and raise the temperature to 60°C. Then slowly add 40.7g of white zinc oxide into the three-necked flask to keep the reaction constant at 60°C, and stop the reaction after the white reactant is completely dissolved. Finally, the mixed solution was filtered while it was hot, and the excess acid and water were removed by rotary evaporation in the filtrate. After standing for 5 to 48 hours, pale yellow rod-shaped α-zinc methacrylate crystals were precipitated. The crystals were filtered out, washed, and vacuum-dried at room temperature.

Embodiment 1-3

[0033] Synthesis of α-cadmium methacrylate

[0034] Add 89ml of α-methacrylic acid in 90ml of aqueous solution into a three-neck flask equipped with a reflux condensing device and a mechanical stirrer, and raise the temperature to 65°C. Then slowly add 64.2g of black cadmium oxide into the three-necked flask to keep the reaction constant at 65°C, and stop the reaction after the black reactant is completely dissolved. Finally, filter the mixed solution while it is hot, remove excess acid and water by rotary evaporation, and after standing for 5 to 20 hours, a large number of white flaky cadmium methacrylate crystals precipitate out, filter out the crystals, wash, and vacuum dry at room temperature . Embodiment 1-4:

Embodiment 1-4

[0035] Synthesis of Europium α-Methacrylate

[0036]Add 60ml of α-methacrylic acid in 30ml of aqueous solution into a three-neck flask equipped with a reflux condensing device and a mechanical stirrer, and raise the temperature to 80°C. Then slowly add 5g of europium oxide into the three-neck flask to keep the reaction constant at 80°C, and stop the reaction after the white reactant is completely dissolved. Finally, the mixture was filtered while it was hot, and the filtrate was absorbed to neutrality with a large amount of 20ml of absolute ethanol, and finally the alcohol and water were removed by rotary evaporation, and after standing at 5°C for 5 to 20 hours, white flake Cadmium acrylate crystals were precipitated, and the crystals were filtered out, washed, and vacuum-dried at room temperature.

[0037] The synthesis of other organic acid salt-like metal monomers containing double bonds can be carried out by the same or similar method as in the examples, which will not be...

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Abstract

A process for preparing the structure controllable composite inorganic nanoparticle / polymer ultra-thin film includes synthesizing organic metal salt monomer containing double bond, surface graft reaction of substrate, surface initiated active free radical polymerizing reaction to produce precursor film, and in-situ growth to obtain the composite ultra-thin film. Its advantages are high adhesion to substrate, hardness, chemical stability and high temp resistance, and controllable thickness.

Description

Technical field: [0001] The invention relates to a method for preparing an inorganic nanoparticle / polymer composite film, in particular to a method that combines surface-initiated active free radical polymerization and in-situ generation to make the thickness of the film layer and the internal structure of the film controllable. A method for preparing an inorganic nanoparticle / polymer composite ultra-thin film. Background technique: [0002] With the deepening and improvement of nanoscience research and technology development, the research on nano-hybrid and nano-composite materials has developed into a very active research field in the disciplines of physics, chemistry, and materials science. The research on the functionalization of thin films has attracted people's attention. The most common methods suitable for preparing inorganic nanoparticles / polymer composite thin films include Langmuir-Blodgett (LB) film method, Layer-by-Layer (LbL) assembly method, chemical depositi...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J7/16C08K3/00
Inventor 王佳瑜陈伟刘安华杨柏
Owner JILIN UNIV
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