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Method for preparing layered K2Ti4O9 continuous nanofiber

A nanofiber, butyl titanate technology, applied in fiber processing, spinning solution preparation, chemical instruments and methods, etc., can solve the problems of difficult control of process conditions, small aspect ratio of nanofibers, complicated preparation process, etc. The effect of convenient operation, simple process and simple production equipment

Inactive Publication Date: 2015-07-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for preparing continuous nanofibers of layered potassium tetratitanate, so as to overcome the above-mentioned problems such as complex preparation process, difficult control of process conditions, and small aspect ratio of nanofibers.

Method used

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  • Method for preparing layered K2Ti4O9 continuous nanofiber
  • Method for preparing layered K2Ti4O9 continuous nanofiber
  • Method for preparing layered K2Ti4O9 continuous nanofiber

Examples

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Effect test

Embodiment 1

[0032] 1. Preparation of spinning solution

[0033] First prepare the sol solution: drop 0.5-1ml of acetylacetone into 6.8g of butyl titanate, stir for 20 minutes, then drop in the ethanol solution of citric acid, stir for 40 minutes after dropping, and then slowly drop in 2.02g of KNO 3 Nitric acid solution of 0.32 g of CTAB was added dropwise after stirring for 40 min. After dropping, continue to stir and react for one hour to form a uniform and transparent light yellow sol solution; then prepare polyvinyl alcohol aqueous solution: mix polyvinyl alcohol and water in a mass ratio of 1:50, heat and stir at about 90°C for 2 -3 hours, then let it stand and cool to room temperature to obtain an aqueous solution of polyvinyl alcohol; finally prepare the spinning solution: add the sol solution obtained above to the aqueous solution of polyvinyl alcohol dropwise at a volume ratio of 1:4, and Stirring for 1h, the sol-like [KNO 3 -Ti(OC 2 h 5 ) 4 ] / the spinning solution of polyvi...

Embodiment 2

[0039] 1. Preparation of spinning solution

[0040] First prepare the sol solution: drop 0.5-1ml of acetylacetone into 6.8g of butyl titanate, stir for 20 minutes, then drop in the ethanol solution of citric acid, stir for 40 minutes after dropping, and then slowly drop in 2.02g of KNO 3 Nitric acid solution of 0.55 g of CTAB was added dropwise after stirring for 40 min. After dropping, continue to stir and react for one hour to form a uniform and transparent light yellow sol solution; then prepare polyvinyl alcohol aqueous solution: mix polyvinyl alcohol and water in a mass ratio of 1:100, heat and stir at about 90°C for 2 -3 hours, then let it stand and cool to room temperature to obtain an aqueous solution of polyvinyl alcohol; finally prepare the spinning solution: add the sol solution obtained above to the aqueous solution of polyvinyl alcohol dropwise at a volume ratio of 1:2, and stir at room temperature 1h, the sol-like [KNO 3 -Ti(OC 2 h 5 ) 4 ] / the spinning solut...

Embodiment 3

[0046] 1. Preparation of spinning solution

[0047] First prepare the sol solution: drop 0.5-1ml into 6.8g butyl titanate, stir for 20min, then drop into the ethanol solution of citric acid, then stir for 40min after dropping, then slowly drop into 2.02g of KNO 3 Nitric acid solution of 0.45 g of CTAB was added dropwise after stirring for 40 min. After dropping, continue to stir and react for one hour to form a uniform and transparent light yellow sol solution; then prepare polyvinyl alcohol aqueous solution: mix polyvinyl alcohol and water in a mass ratio of 1:100, heat and stir at about 90°C for 2 -3 hours, then let it stand and cool to room temperature to obtain an aqueous solution of polyvinyl alcohol; finally prepare the spinning solution: add the sol solution obtained above to the aqueous solution of polyvinyl alcohol dropwise at a volume ratio of 1:2, and stir at room temperature 1h, the sol-like [KNO 3 -Ti(OC 2 h 5 ) 4 ] / polyvinyl alcohol spinning solution;

[0...

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Abstract

The invention is a method for preparing nanofiber, and in particular comprises: by using butyl titanate, KNO3, citric acid, ethanol and nitric acid as raw materials, wherein by molar ratio, butyl titanate: KNO3: Citric acid: ethanol: dilute nitric acid = 1:2:2: (38 ~ 50): (19 ~ 25), polyvinyl alcohol or polyvinyl pyrrolidone as a polymer template, and aqueous solution of polyvinyl alcohol as a solvent, preparing a sol solution at room temperature; then preparing composite fiber by using an electrostatic spinning method, wherein an electrostatic spinning voltage is controlled to be 10 ~ 30KV, and curing distance of the nozzle to the accept screen is 8 ~ 20cm; and then performing heat treatment to the composite fiber at 500 ~ 950 DEG C for 3 ~ 8h to obtain layered K2Ti4O9 continuous nanofiber. The method of the invention is simple in process, easy in operation, high in efficiency, low in energy consumption, and simple in production equipment; and the prepared fiber has high purity, good crystallinity, a large surface area, a large length-diameter ratio and good dispersion.

Description

technical field [0001] The invention relates to the technical field of inorganic fiber preparation, in particular to a method for preparing layered potassium tetratitanate continuous nanofibers. Background technique [0002] Nanofiber refers to a linear material with two dimensions in the nanoscale on the three-dimensional space scale of the material, usually the radial dimension is on the order of nanometers, and the length is relatively large. Due to their different shapes, there are several types of nanowires, nanowires, nanorods, nanotubes, nanobelts, and nanocables. Since the radial scale of nanofibers is as small as nanometers, it shows a series of characteristics, the most prominent is the large specific surface area, which increases its surface energy and activity, and then produces small size effects, surface or interface effects, and quantum size effects. , macroscopic quantum tunneling effect, etc., and therefore exhibit a series of specificities in chemistry and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08D01D1/02D01D5/00D01D10/02C01G23/00
Inventor 王浩梅森吴事江程磊彭玲
Owner WUHAN UNIV OF TECH
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