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Preparation method of phosphorus-silicon-containing self-assembly layer and metal oxide co-modified TiO2 nanotube

A self-assembled layer, nanotube technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of decreased flame retardant efficiency and poor dispersion of nanotubes state and other issues, to achieve the effect of good flame retardant application prospects, controllable matrix affinity, and controllable flame retardant efficiency

Inactive Publication Date: 2021-03-16
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like carbon nanotubes and other inorganic nano flame retardants, a single TiO 2 Nanotubes are prone to agglomeration in the polymer matrix and present a poor dispersion state, resulting in TiO 2 Decrease in flame retardant efficiency of nanotubes themselves

Method used

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  • Preparation method of phosphorus-silicon-containing self-assembly layer and metal oxide co-modified TiO2 nanotube
  • Preparation method of phosphorus-silicon-containing self-assembly layer and metal oxide co-modified TiO2 nanotube
  • Preparation method of phosphorus-silicon-containing self-assembly layer and metal oxide co-modified TiO2 nanotube

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preparation example Construction

[0039] An embodiment of the present invention provides a TiO co-modified with a phosphorus-containing silicon self-assembly layer and a metal oxide 2 A method for preparing nanotubes, comprising the steps of:

[0040] S1. Preparation of TiO 2 nanotubes; in the present invention, TiO 2 The nanotube method is: the TiO 2 Add the powder into 10mol / L sodium hydroxide solution, stir evenly to obtain the first suspension, wherein, the sodium hydroxide solution and TiO 2 The mass ratio of the powder is 20-30:1, the first suspension is transferred to a polytetrafluoroethylene reactor for hydrothermal reaction, and the reaction is carried out at a temperature of 130-160°C for 24-48 hours to obtain the first reactant, After the first reactant is cooled to room temperature, centrifuge to obtain the first solid substance, wash the first solid substance with deionized water until neutral, and disperse the washed first solid substance in 50-100ml of 1mol / L After stirring and reacting for...

Embodiment 1

[0074] S1. Preparation of TiO 2 Nanotubes: 2.5g TiO 2 Disperse the powder in 40ml of 10mol / L sodium hydroxide solution, stir evenly to obtain the first suspension, transfer the first suspension to a 50ml polytetrafluoroethylene reactor, and carry out hydrothermal reaction at 150°C for 36h, Obtain the first reactant, after the first reactant is cooled to room temperature, centrifuge to obtain the first solid substance, wash the first solid substance with deionized water until neutral, and disperse the washed first solid substance in 100ml 1mol / L HCl solution, stirred for 12 hours to obtain the second reactant, centrifuged to obtain the second solid substance, and repeatedly washed with deionized water to obtain the second reactant, centrifuged to obtain the second solid substance until neutral , placed in an oven at 60°C for 24 hours to obtain TiO 2 nanotube;

[0075] S2. Preparation of TiO with copper oxide layer on the surface by wet chemical method 2 Nanotubes: Add 1.5g ...

Embodiment 2

[0091] S1. Preparation of TiO 2 Nanotubes: Disperse 2.5g of titanium dioxide powder in 40ml of 10mol / L sodium hydroxide solution, stir evenly to obtain the first suspension, transfer the first suspension to a 50ml polytetrafluoroethylene reactor at a temperature of 160°C The hydrothermal reaction was carried out for 36 hours at a lower temperature to obtain the first reactant. After the first reactant was cooled to room temperature, it was centrifuged to obtain the first solid substance. After the first solid substance was obtained, the first solid substance was washed to neutrality with deionized water, and the washed The first solid substance was dispersed in 80ml of 1mol / L HCl solution, stirred and reacted for 12h to obtain the second reactant, centrifuged to obtain the second solid substance, and repeatedly washed with deionized water to obtain the second reactant, centrifuged to obtain the second reactant After the two solids are neutralized, dry them in an oven at 60°C f...

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Abstract

The invention relates to the technical field of new materials, in particular to a preparation method of a phosphorus-silicon-containing self-assembly layer and metal oxide co-modified TiO2 nanotube. The preparation method mainly comprises the following steps: preparing a TiO2 nanotube, loading a metal oxide layer on the surface of the TiO2 nanotube, preparing a positive electrolyte solution and anegative electrolyte solution, dispersing the loaded metal oxide layer in the positive electrolyte solution, stirring for 5-15 minutes, dispersing in the negative electrolyte solution, and stirring for 5-15 minutes, and completing a first bimolecular self-assembly layer on the surface of the TiO2 nanotube loaded with the metal oxide, and repeating the operation for 5-15 times to obtain the 5-15 phosphorus-silicon-containing self-assembly layer and metal oxide co-modified TiO2 nanotube The phosphorus-silicon-containing self-assembly layer and metal oxide co-modified TiO2 nanotube has excellentflame-retardant synergy and matrix affinity, the defects of poor dispersity, low flame-retardant efficiency and the like of the TiO2 nanotube are overcome, and the flame-retardant application prospectis good.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a method for preparing TiO2 nanotubes co-modified by phosphorus-silicon self-assembly layers and metal oxides. Background technique [0002] TiO 2 As a typical tubular inorganic nanoparticle, nanotubes have many excellent properties, including good chemical corrosion, photocatalysis, heat resistance, non-toxicity and high surface activity. In recent years, TiO 2 As a kind of nano-flame retardant, nanotubes have been widely used in the flame-retardant modification of high molecular polymer materials. It is generally believed that TiO 2 The unique excellent adsorption of nanotubes, combined with the characteristics of forming a network physical barrier layer in the polymer matrix, thus exerts a flame retardant effect. Like carbon nanotubes and other inorganic nano flame retardants, a single TiO 2 Nanotubes are prone to agglomeration in the polymer matrix and present a po...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G3/02C01G19/02C01G49/02B82Y30/00B82Y40/00C09C1/36C09C3/08C09C3/10C09C3/12C09C3/06B01J23/00B01J23/72B01J23/745B01J23/14
CPCB01J23/002B01J23/14B01J23/72B01J23/745B82Y30/00B82Y40/00C01G3/02C01G19/02C01G23/08C01G49/02C01P2002/72C01P2002/82C01P2004/04C01P2004/64C09C1/3661C09C1/3669C09C1/3676C09C1/3684C09C3/006C09C3/063C09C3/08C09C3/10C09C3/12
Inventor 潘海峰马文彬
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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