Polyaniline coated nano TiO2 and poly aniline coated TiO2 whisker and their preparing method

A technology of polyaniline coating, which is applied in the treatment of fibrous fillers and dyed polymer organic compounds, can solve the problems of high surface activity of nanoparticles, easy agglomeration, difficulty in compounding organic and inorganic substances, etc., and achieves a simple preparation process easy effect

Inactive Publication Date: 2006-08-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high surface activity of nanoparticles and easy agglomeration, it is difficult to realize the compounding o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Dispersant sodium dodecylbenzenesulfonate 0.4g is dissolved in the hydrochloric acid solution of 400ml 0.2mol / L, then adds TiO 2 1g of nanoparticles, and use a high-speed dispersing homogenizer to stir at a high speed for about 10 minutes. At this time, the dispersion system is milky white; continue to ultrasonically oscillate with an ultrasonic cleaner for 20 minutes; then add 1g of aniline hydrochloric acid, and the milky white solution turns slightly gray at this time; continue to stir for 20 minutes Finally, add 50ml of ammonium persulfate hydrochloric acid solution (dissolve 1.75g ​​of ammonium persulfate in 50ml of dilute hydrochloric acid), and control the dropping time for about 10 minutes. Stir for 3-4 hours, the color changes from dark blue-blue-black-blue-green-green; finally filter with suction, and wash with absolute ethanol repeatedly until the filtrate is clear and then wash with 0.06mol / L hydrochloric acid solution repeatedly for 3 or 4 time...

Embodiment 2

[0025] Embodiment 2: Same as Example 1, wherein the dispersant is polyethylene glycol 2g, which obtains polyaniline coated TiO 2 Nanoparticles

Embodiment 3

[0026] Embodiment 3: same example 1, wherein TiO 2 Nanoparticles changed to TiO 2 Whiskers, resulting in polyaniline-coated TiO 2 whiskers.

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PUM

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Abstract

The present invention relates to polyaniline coated nanometer TiO2 and polyaniline coated nanometer TiO2 whisker and their preparation process, and belongs to the field of organic-inorganic composite material preparing technology. The materials including nanometer TiO2 or nanometer TiO2 whisker 100 weight portions, aniline hydrochloride 0.1í½200 weight portions, dispersant 0.1í½50 weight portions, dispersing medium 1000í½20000 weight portions and oxidant in the equal equivalent ratio to aniline hydrochloride, are prepared into the polyaniline coated nanometer TiO2 or polyaniline coated nanometer TiO2 whisker through a in-situ chemical oxidizing polymerization process, in which surfactant or dispersant treated nanometer TiO2 or nanometer TiO2 whisker is dispersed in hydrochloric acid to form stable suspension, and aniline hydrochloride is then added via stirring and dropping ammonium sulfate solution. The polyaniline coated nanometer TiO2 and polyaniline coated nanometer TiO2 whisker can absorb ultraviolet ray, visible light and infrared ray.

Description

1. Technical field [0001] The invention belongs to an organic-inorganic nano composite material, in particular to the field of conductive polymer-inorganic nano composite material. 2. Background technology [0002] Organic-inorganic nanocomposites have very important application prospects in the fields of mechanics, electromagnetic functions, and bioengineering because they can combine the excellent properties of inorganic and organic substances and the characteristics of nanomaterials. However, due to the high surface activity of nanoparticles and easy agglomeration, it is difficult to realize the compounding of organic and inorganic substances at the nanoscale by traditional blending methods to obtain organic-inorganic nanocomposites. [0003] Polyacetylene, polypyrrole, polythiophene, polyaniline and other polymer nanopowders with conductive structure have very good wave-absorbing properties. Among conductive polymers, polyaniline has become the most promising conductive...

Claims

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Application Information

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IPC IPC(8): C09C3/10C09C1/36
Inventor 陶杰周慧
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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