Organic and inorganic composite nanofiber, organic and inorganic composite structure and methods for producing the same

An inorganic composite, nanofiber technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as structures that are difficult to manufacture nanofibers

Active Publication Date: 2007-02-28
KAWAMURA INST OF CHEM RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, various studies have been made on the technology of controlling nanostructure materials such as silica nanofibers into structures such as the above-mentioned filter shape, but it is difficult to manufacture nanofiber structures containing inorganic materials such as silica. body

Method used

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  • Organic and inorganic composite nanofiber, organic and inorganic composite structure and methods for producing the same
  • Organic and inorganic composite nanofiber, organic and inorganic composite structure and methods for producing the same
  • Organic and inorganic composite nanofiber, organic and inorganic composite structure and methods for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0124] Hereinafter, the present invention will be described in further detail through examples and reference examples, but the present invention is not limited thereto. Unless otherwise specified, "%" means "mass %".

[0125] [Analysis by X-ray Diffraction]

[0126] Put the separated and dried sample on the measurement sample holder, and place it in the wide-angle X-ray diffraction device "Rint-Ultma" manufactured by Rigam Co., Ltd., at Cu / Kα line, 40kV / 30mA, scanning speed 1.0° / The measurement is carried out under the conditions of the scanning range of 10° to 40°.

[0127] [Analysis by Differential Scanning Calorimetry]

[0128] The separated and dried sample was weighed by the measurement supplement, and placed in the thermal analysis device "DSC-7" produced by PerkinElmer, with a heating rate of 10 °C / min, and the measurement was performed within the temperature range of 20 °C to 90 °C.

[0129] [Shape Analysis Using Scanning Electron Microscope]

[0130] The separate...

Synthetic example 1

[0134]

[0135] 5 g of commercially available polyethyloxazoline (number average molecular weight 500,000, average degree of polymerization 5,000, manufactured by Aldrich) was dissolved in 20 mL of 5M aqueous hydrochloric acid. The solution was heated to 90° C. using an oil bath, and stirred at this temperature for 10 hours. 50 ml of acetone was added to the reaction solution to completely precipitate the polymer, and the precipitate was filtered and washed three times with methanol to obtain white polyethyleneimine powder. use 1 H-NMR (heavy water) identifies gained powder, confirms to be derived from the peak 1.2ppm of the side chain ethyl of polyethyloxazoline (CH 3 ) and 2.3ppm (CH 2 )Completely disappear. That is, it was shown that polyethyloxazoline was completely hydrolyzed and converted into polyethyleneimine.

[0136] This powder was dissolved in 5 mL of distilled water, and 50 mL of 15% ammonia water was added dropwise to the solution while stirring. After the...

Synthetic example 2

[0138]

[0139] 30 g of commercially available polyethyloxazoline (number average molecular weight 50,000, average degree of polymerization 500, manufactured by Aldrich) was dissolved in 125 mL of 5M aqueous hydrochloric acid. The solution was heated to 100° C. using an oil bath, and stirred at this temperature for 12 hours. 150 ml of acetone was added to the reaction solution to completely precipitate the polymer, and the precipitate was filtered and washed three times with acetone to obtain white polyethyleneimine hydrochloride powder. use 1 H-NMR (heavy water) identifies gained powder, confirms to be derived from the peak 1.2ppm of the side chain ethyl of polyethyloxazoline (CH 3 ) and 2.3ppm (CH 2 )Completely disappear. That is, it was shown that polyethyloxazoline was completely hydrolyzed and converted into hydrochloride of polyethyleneimine.

[0140] This powder was dissolved in 250 mL of distilled water, and 120 mL of 10% NaOH aqueous solution was added dropwise ...

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Abstract

Disclosed is an organic-inorganic composite nanofiber composed of a crystalline polymer filament made of a polymer having a linear polyethyleneimine skeleton and a silica covering the crystalline polymer filament. Also disclosed are a structure composed of such an organic-inorganic composite nanofiber, and a method for producing the same.

Description

technical field [0001] The present invention relates to an organic-inorganic composite nanofiber composed of a crystalline polymer filament of a polymer having a linear polyethyleneimine skeleton and silica covering the above-mentioned crystalline polymer filament. A structure composed of inorganic composite nanofibers and a preparation method thereof. Background technique [0002] It is well known that materials with a nanoscale structure exhibit different properties from the bulk state, in which nanofibers having a nanometer thickness and a length several tens of times greater than that thickness exhibit characteristic properties of the fiber shape through their high aspect ratio. Therefore, it has attracted attention as a cutting-edge material. Silica nanofibers not only have the unique high aspect ratio or large surface area of ​​nanofibers, but also have various physical properties such as semiconductor characteristics, electrical conductivity, surface physical propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08J3/00C08K3/36
CPCC08G83/001B82Y30/00B82Y40/00C08J3/00C08K3/36C08L79/02
Inventor 金仁华袁健军
Owner KAWAMURA INST OF CHEM RES
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