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Method for preparing nitrogen-doped nanometer TiO2 fiber cloth

A nitrogen-doped, fiber cloth technology is applied in the field of nano-TiO2 functional fiber material preparation, which can solve the problems of inability to efficiently and stably exert photocatalytic performance, low resistance to water impact load, poor mechanical strength, etc., and achieve easy recycling and reuse. , The effect of strong resistance to water impact load and high degree of automation

Inactive Publication Date: 2014-04-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to provide a kind of nitrogen-doped nano-TiO 2 A method for preparing fiber cloth to overcome the disadvantages of poor mechanical strength, low water impact load resistance, uneven distribution during use, and inability to efficiently and stably exert photocatalytic performance in currently prepared nanofibers

Method used

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  • Method for preparing nitrogen-doped nanometer TiO2 fiber cloth
  • Method for preparing nitrogen-doped nanometer TiO2 fiber cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Collect nitrogen-doped nano-TiO 2 The fiber precursor is sent to the opening machine and the carding machine in turn for opening and carding, to remove the bamboo-shaped impurities in the fiber precursor, and to comb the fiber precursor into a single-filament fiber network, and place the obtained fiber network in a On the laying equipment, evenly staggered to form a five-layer fiber mesh structure, forming five layers of nitrogen-doped nano-TiO 2 Web 2 (see figure 1 ).

[0024] like figure 1 As shown, the laid fiber web 2 is introduced into the dipping tank 5 through the conveyor belt 1 for dipping, the conveyor belt 1 is driven by the rotating shaft 3, and the adhesive is composed of unsaturated polyester resin and tert-butyl perbenzoate. The mass ratio of the two is 100:8.2, and the impregnation is performed under normal pressure for 0.5 hours, so that the adhesive is fully impregnated into the fiber web. The dipped fiber web 2 is pressed by a pair of rollers 4 to...

Embodiment 2

[0026] According to the method of Example 1, ten layers of fiber mesh structure are uniformly staggered to form ten layers of nitrogen-doped nano-TiO 2 Web 2 (see figure 1 ).

[0027] The laid fiber web is introduced into the dipping tank 5 through the conveyor belt 1 for dipping. The composition of the adhesive is a phenolic resin solution diluted with absolute ethanol, and the volume ratio of the two is 1.5-2.5:5. , so that the adhesive is fully impregnated into the fiber web. The fiber web after dipping is pressed by a pair of rollers 4 to remove excess adhesive on the surface. The fiber web after pressing is introduced into tube furnace 6 (see figure 2 ) at a rate of 150°C / hour to the solidification temperature of the adhesive at 140°C, and kept at 140°C for 2 hours to fully cure the adhesive. Water vapor is passed through the narrow tube 7, and the excess water vapor is discharged from the discharge pipe 8 to the outside, and at the same time, the temperature is rais...

Embodiment 3

[0029] According to the method of Example 1, a fifteen-layer fiber network structure is uniformly staggered to form fifteen layers of nitrogen-doped nano-TiO 2 Web 2 (see figure 1 ).

[0030] The laid fiber web is introduced into the dipping tank 5 through the conveyor belt 1 for dipping, and the adhesive is composed of epoxy resin, low molecular polyamide resin, polybutadiene epoxy, 2-ethyl-4-formaldehyde The mass ratio of imidazole and 260 epoxy reactive diluent is 100:10:20:5:12, impregnated under normal pressure for 5 hours, so that the adhesive is fully impregnated into the fiber web. The fiber web after dipping is pressed by a pair of rollers 4 to remove excess adhesive on the surface. The fiber web after pressing is introduced into tube furnace 6 (see figure 2 ) at a rate of 80°C / hour to the solidification temperature of the adhesive at 100°C, and kept at 100°C for 4 hours to fully cure the adhesive. Water vapor is passed through the narrow tube 7, and the excess w...

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Abstract

The invention provides a method for preparing nitrogen-doped nanometer TiO2 fiber cloth. Nitrogen-doped nanometer TiO2 fiber precursor is used as a raw material. The method includes the particular steps: (1) web laying; (2) impregnation; (3) pressing; and (4) solidification and calcination forming. The collected nitrogen-doped nanometer TiO2 fiber precursor is sequentially loosened and carded, impurities in the shape of a bamboo joint in fibers are removed, the fibers are carded to form monofilament fiber webs, and the monofilament fiber webs are uniformly laid to form a layered net structure in a staggered manner; the laid fiber webs pass through an impregnation tank to sufficiently contact with adhesive; and the impregnated fiber webs are rolled at constant speed by rolls, redundant adhesive on the surfaces of the fiber webs are removed, and the fibers are bonded more tightly. The method has the advantages that technology of a preparation process is simple, the automation degree is high, and the method is applicable to industrial batch production; the prepared fiber cloth does not need a carrier, and has a self-supporting characteristic; and the fibers are longitudinally and transversely staggered and bonded tightly, the quantity of pores is high, and the specific surface area is large.

Description

technical field [0001] The invention relates to a nitrogen-doped nano-TiO as a photocatalyst 2 The preparation method of fiber cloth belongs to nano TiO 2 Technical field of functional fiber material preparation. Background technique [0002] Semiconductor photocatalysts, especially nitrogen-doped nano-TiO 2 Photocatalysts have become a new research hotspot in the field of water treatment applications in recent years because they can directly use visible light to mineralize pollutants, and because they exhibit obvious surface effects and quantum size effects at the nanoscale. Currently TiO 2 Photocatalysts are mainly prepared in three forms: nano-TiO 2 Powder, supported TiO 2 and thin film TiO 2 . However, the suspended phase nano-TiO used in water treatment 2 Powders are prone to agglomeration, difficult to settle, and difficult to recycle, resulting in increased costs, which is not conducive to the regeneration and reuse of catalysts. Loaded TiO 2 and thin film T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4209D04H1/587D04H1/72D06C7/00B01J27/24
Inventor 包南吴国林牛军剑于晓红张成禄
Owner SHANDONG UNIV
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