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Method for production of inorganic nanofibres through electrostatic spinning

a technology of electrostatic spinning and nanofibres, which is applied in the direction of electro-spinning, electrical equipment, artificial filaments of inorganic materials, etc., can solve the problem that the known solutions used for electrostatic spinning of anorganic nanofibres cannot be used for continual production of nanofibres

Inactive Publication Date: 2011-03-03
DUCHOSLAV JIRI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0010]For the purpose to increase the electrical conductivity of solution and to increase efficiency of production process, it is possible to add into the solution a concentrated acid, which is according to the claim 3 preferably selected from the group of hydrochloric acid, nitric acid, phosphoric acid.

Problems solved by technology

The known solutions used for production of anorganic nanofibres through electrostatic spinning from nozzles cannot be used for continual production of nanofibres, because alkoxides are time-unsteady and are easily subject to degradation of alkoxide through hydrolysis, this even through action of air humidity, which occurs still before their spinning.

Method used

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  • Method for production of inorganic nanofibres through electrostatic spinning
  • Method for production of inorganic nanofibres through electrostatic spinning
  • Method for production of inorganic nanofibres through electrostatic spinning

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embodiment

OF EMBODIMENT

[0020]Spinning solution for production of inorganic nanofibres, especially of TiO2, SiO2, Al2O3, ZrO2 and B2O3, by means of electrostatic spinning contains as a source of inorganic basis an alkoxide of respective metal, semi-metal or non-metal, which is dissolved in a suitable solvent, e.g. in ethanol, 1-propanol or 2-propanol. To stabilise the solution of alkoxide, especially to prevent its hydrolysis, an addition of chelating agent as stabiliser is necessary. The most suitable chelating agent is 6-diketone, e.g. acetylaceton. Molecular ratio between alkoxide and chelating agent should be within the range from 1:0.8 to 1:2.2. To improve the spinning ability of the solution also supporting polymer is added into it, which may be represented by e.g. poly(vinylpyrrolidone) having molecular weight of 1300000 g / mol or viscosity number K-90, while its weight concentration towards a total weight of solution is from 4 to 9% by weight.

[0021]The process of electrostatic spinning ...

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Abstract

The present disclosure relates to the production method of inorganic nanofibres through electrostatic spinning of solution, which comprises alkoxide of metal or of semi-metal or of non-metal dissolved in a solvent system on basis of alcohol. The solution is stabilised by chelating agent, which prevents hydrolysis of alkoxide, and after homogenisation it is mixed with solution of poly(vinylpyrrolidone) in alcohol, after then the resultant solution is brought into electrostatic field, in which the electrostatic spinning is running continually, the result of which is production of organic-inorganic nanofibres, which are after then calcinated outside the spinning device in the air atmosphere at the temperature from 500° C. to 1300° C.

Description

TECHNICAL FIELD[0001]The invention relates to a method for production of inorganic nanofibres through electrostatic spinning of solution, which contains alkoxide of metal or of semi-metal or of non-metal dissolved in a solvent system on basis of alcohol.BACKGROUND ART[0002]Inorganic materials feature a number of properties, thanks to which they are suitable for usage in many technical fields, e.g. in electrotechnics, medicine, industry, etc. For example, TiO2, SiO2, Al2O3, ZrO2 and B2O3 belong to the important inorganic substances. At inorganic nanofibres there are combined properties of nanofibrous materials, like an organised one-dimensional structure with properties of nanomaterials, especially with high specific surface, and with physical-chemical properties of inorganic substances as hardness, thermal resistance and structure of electron stripes. Therefore the resultant nanofibres are suitable for production of composite materials, catalysts, electrochemical elements, etc.[0003...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01F9/08D04H1/728
CPCD01D5/003D01F9/08D01D10/02
Inventor DUCHOSLAV, JIRIRUBACEK, LUKAS
Owner DUCHOSLAV JIRI
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