TiO2-SiO2 bi-component nano-grade fiber and preparation method thereof

A nanofiber, two-component technology, applied in fiber processing, fiber chemical characteristics, spinning solution preparation, etc., can solve the problems of difficult to obtain nanofibers, cannot fully reflect the advantages of two-component nanocomposite fibers, etc. Wide-ranging, easy-to-control, mild effects

Inactive Publication Date: 2012-03-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] At present, TiO is prepared by electrospinning 2 -SiO 2 The technology of nanocomposite fibers, since the raw materials are formed by homogeneous mixing of TiO 2 -SiO 2 Nanocomposite fibers, SiO 2 Evenly distributed throughout the fiber, cannot fully reflect the advantages of bicomponent nanocomposite fibers
[0016] Electrospinning is a very effective and convenient method for preparing nanofibers, but TiO prepared by a single electrospinning 2 -SiO 2 Composite nanofibers, hard to get SiO 2 in TiO 2 Surface Composite Bicomponent Nanofibrous Structure
However, there is currently no information on SiO 2 in TiO 2 Report on Nanocomposite Fibers Formed by Surface Composite

Method used

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  • TiO2-SiO2 bi-component nano-grade fiber and preparation method thereof
  • TiO2-SiO2 bi-component nano-grade fiber and preparation method thereof
  • TiO2-SiO2 bi-component nano-grade fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] By weight, under stirring conditions, 0.6g of polyvinylpyrrolidone, 10.0g of absolute ethanol, 4.0g of butyl titanate and 4.0g of concentrated HCl were added to a 100ml round bottom flask at a temperature of 75°C Under the conditions of constant temperature reaction for 2 hours, solution A was obtained;

[0039] The solution A was subjected to electrospinning, the voltage used for electrospinning was 15 kV, the injection rate was 2 ml / hour, the curing distance was 8 cm, the receiving device was aluminum foil, and the electrospinning time was 2 hours, the corresponding Nanofibers;

[0040] The nanofibers obtained by electrospinning were dried at a temperature of 100°C for 12 hours, then heated to 650°C at a heating rate of 1°C / min, and kept at a constant temperature for 4 hours to obtain a preliminary product;

[0041] By weight, 6.0 g of concentrated ammonia water was added dropwise to 100.0 g of absolute ethanol under stirring conditions, and after stirring for 4 hour...

Embodiment 2

[0046] 1) By weight, under stirring conditions, mix 0.6g of polyvinylpyrrolidone, 15.0g of absolute ethanol, 4.0g of butyl titanate and 4.0g of concentrated H 2 SO 4 Add it into a 100ml round bottom flask, and react at a constant temperature of 90°C for 6 hours to obtain solution A;

[0047] 2) The solution A was subjected to electrospinning, the voltage used for electrospinning was 15 kV, the sampling rate was 1 ml / hour, the curing distance was 15 cm, the receiving device was aluminum foil, and the electrospinning time was 3 hours, the obtained corresponding nanofibers;

[0048] 3) drying the nanofibers obtained by electrospinning at a temperature of 85°C for 24 hours, then heating to 500°C at a heating rate of 1°C / min, and keeping the temperature constant for 8 hours to obtain a preliminary product;

[0049] 4) Add 10.0 g of concentrated ammonia water dropwise to 150.0 g of absolute ethanol by weight under stirring conditions, and after stirring for 2 hours, add 5.0 g of e...

Embodiment 3

[0053] 1) By weight, under agitation, 0.6g of polyvinylpyrrolidone, 12.0g of dehydrated alcohol, 4.0g of butyl titanate and 4.0g of p-toluenesulfonic acid were added to a 100ml round bottom flask, Under the temperature condition of 20°C, the reaction was carried out at constant temperature for 8 hours to obtain solution A;

[0054] 2) The solution A was subjected to electrospinning, the voltage used for electrospinning was 20 kV, the injection rate was 8 ml / hour, the curing distance was 12 cm, the receiving device was aluminum foil, and the electrospinning time was 2 hours, and the obtained corresponding nanofibers;

[0055] 3) drying the nanofibers obtained by electrospinning at a temperature of 70°C for 24 hours, then heating to 1100°C at a heating rate of 1°C / min, and keeping the temperature constant for 4 hours to obtain a preliminary product;

[0056] 4) Add 4.0 g of concentrated ammonia water dropwise to 120.0 g of absolute ethanol by weight under stirring conditions, a...

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Abstract

The invention discloses TiO2-SiO2 bi-component nano-grade fiber and a preparation method thereof. According to weight proportions, 4 to 10 parts of strong ammonia water is added to 100 to 150 parts of absolute alcohol, the mixture is stirred for 2 to 8 hours, and 4 to 10 parts of tetraethoxysilane is added to the mixture, such that a solution is prepared; TiO2 nano-grade fiber is prepared with a static electricity spinning technology; the TiO2 nano-grade fiber is added to the solution while stirred under a temperature of 20 to 60 DEG C; the mixture is subject to a reaction for 6 to 8 hours, the product is filtered and washed; the product is subject to a drying treatment for 12 to 24 hours under a temperature of 70 to 100 DEG C, and is heated to a temperature of 500 to 1200 DEG C with a heating rate of 1 DEG C / min; the temperature is maintained for 4 to 8 hours, such that the TiO2-SiO2 bi-component nano-grade fiber is obtained. According to the invention, TiO2 is a main component of the nano-grade fiber, particle-shaped SiO2 extrusions are composed on the surface of the TiO2 nano-grade fiber. SiO2 and TiO2 are combined through chemical bonds. With the nano-grade fiber, property advantages of TiO2 and SiO2 nano-grade fiber are combined. The preparation method has advantages of simple process, mild condition, easy control, wide application range, and the like.

Description

technical field [0001] The present invention relates to a kind of nanometer material and its preparation method, particularly a kind of TiO 2 -SiO 2 Bicomponent nanofibers and methods for their preparation. Background technique [0002] Since the discovery of carbon nanotubes by Iijima et al. in 1991, one-dimensional nanomaterials including nanofibers, nanotubes, nanorods, nanobelts, etc. have become the focus of scientists in many fields. One-dimensional nanomaterials represented by nanofibers have special optical properties, electrical properties, and spatial geometric structures, and are ideal systems for studying physical properties such as electron transport, optical properties, and mechanical properties of nanomaterials. They have important application prospects in nano-devices, especially in the miniaturization of devices, which will play an irreplaceable role and have become a research hotspot. [0003] At present, there are many methods for preparing nanofibers, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01F11/00D01D1/02D01D5/00D01D5/40D01D10/02
Inventor 秦大可梁国正顾嫒娟
Owner SUZHOU UNIV
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