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Novel temperature-sensitive fluorescent nano composite material and preparation method thereof

A nanocomposite material and fluorescent nanotechnology, which is applied in the field of preparation of new temperature-sensitive fluorescent nanocomposite materials, can solve the problems of low surface chemical activity and easy agglomeration, and achieve the effects of convenient operation, simple preparation process, and good industrial production prospects

Inactive Publication Date: 2013-04-24
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon nanotubes have a large aspect ratio and high surface energy, making them extremely easy to agglomerate, with smooth surfaces, few dangling bonds, and low surface chemical activity. These reasons also limit their excellent performance, especially in Optical performance

Method used

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  • Novel temperature-sensitive fluorescent nano composite material and preparation method thereof
  • Novel temperature-sensitive fluorescent nano composite material and preparation method thereof
  • Novel temperature-sensitive fluorescent nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Purification of multi-walled carbon nanotubes: Add 0.2g of multi-walled carbon nanotubes (40~60nm) into 150ml of concentrated nitric acid with a mass concentration of 60~65%, ultrasonically disperse for 2h, and stir under magnetic force at 80°C Reflux for 2 hours, cool, centrifuge, filter with suction, wash repeatedly with deionized water until the filtrate is neutral, then wash with ethanol, dry it in a vacuum oven at 60°C for 24 hours, and grind to obtain purified multi-walled carbon nanotubes.

[0038] (2) Preparation of europium nitrate solution: Add 0.044g of europium oxide into 10ml of concentrated nitric acid with a mass concentration of 60~65%, heat and evaporate to a slurry, cool and crystallize, and recrystallize to obtain colorless europium nitrate crystals ; Dissolved with secondary water then, transferred to a 250ml volumetric flask to obtain a colorless and transparent 0.001M europium nitrate solution.

[0039] (3) Add 0.0704g of the purified multi-wal...

Embodiment 2

[0042] (1) Preparation of multi-walled carbon nanotubes: same as in Example 1.

[0043] (2) Preparation of europium nitrate: same as in Example 1.

[0044] (3) Preparation of europium oxide / carbon nanotube composite material: 0.0706g of purified multi-walled carbon nanotubes and 1.4050g of sodium dodecylbenzenesulfonate prepared above were added to a mixed solution of 70ml of distilled water and ethanol (distilled water The volume ratio to ethanol is 1:1), ultrasonically disperse for 3h, then slowly add 13.8ml 0.001M europium nitrate solution to it, ultrasonically for 1h, slowly drop in 0.01M sodium hydroxide solution, adjust the pH of the solution to 8~9, Sonicate for 1 hour, reflux for 3 hours, filter while hot, wash until neutral, dry, and grind to obtain a nanocomposite material of europium hydroxide / carbon nanotube. Calcined at 500°C to obtain a black novel temperature-sensitive fluorescent nanocomposite material.

[0045] The new temperature-sensitive fluorescent nanoc...

Embodiment 3

[0047] (1) Preparation of multi-walled carbon nanotubes: same as in Example 1.

[0048] (2) Preparation of europium nitrate: same as in Example 1.

[0049] (3) Add 0.0701g of purified multi-walled carbon nanotubes prepared above and 1.4020g of sodium dodecylbenzenesulfonate to a mixed solution of 70ml of distilled water and ethanol (the volume ratio of distilled water and ethanol is 1:1), Ultrasonic dispersion for 3 hours, then slowly add 23ml of 0.001M europium nitrate solution to it, ultrasonic for 1 hour, slowly drop in 0.01M sodium hydroxide solution, adjust the pH of the solution to 8~9, ultrasonic for 1 hour, reflux for 3 hours, filter while hot, and wash to neutrality, dried, and ground to obtain a nanocomposite material of europium hydroxide / carbon nanotube. Calcined at 500°C to obtain a black novel temperature-sensitive fluorescent nanocomposite material.

[0050] The new temperature-sensitive fluorescent nanocomposites have a weak fluorescence emission peak at 650n...

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Abstract

The invention provides a preparation method of a novel temperature-sensitive fluorescent nano composite material, belonging to the technical field of composite materials. The method comprises the following steps: carrying out ultrasonic dispersion on purified multi-wall carbon nanotubes and sodium dodecyl benzene sulfonate in a mixed liquid of ethanol and water, adding an europium nitrate solution, and continuing the ultrasonic dispersion for a period of time; regulating the pH value to 8-9 by using a sodium hydroxide solution; continuing the ultrasonic dispersion for 0.8-1 hour, reacting under reflux for 2.5-3 hours, filtering, washing to neutral, drying and grinding to obtain an europium hydroxide / carbon nanotube nano composite material; and calcining at 500-1000 DEG C for 4-6 hours to obtain the temperature-sensitive fluorescent nano composite material. In the novel temperature-sensitive fluorescent nano composite material, nano Eu2O3 particles are evenly adsorbed on the surfaces of the multi-wall carbon nanotubes. When being calcined at 500-600 DEG C, the composite material emits weaker fluorescence. However, when being calcined at 600-100 DEG C, the composite material can emit stronger fluorescence.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of a novel temperature-sensitive fluorescent nanometer composite material. Background technique [0002] Since the discovery of carbon nanotubes in 1991 by Iijima.S, a Japanese electron microscope expert, they have attracted the attention of many chemists, physicists and material scientists because of their unique structure and properties of electricity, mechanics, optics, corrosion resistance and high temperature resistance. big interest. Taking advantage of its excellent performance, it has been widely used in many fields such as super-strength composite materials, field emission display devices, sensors, and so on. [0003] Carbon nanotubes are seamless nanoscale tubes formed by curling single-layer or multi-layer graphite sheets around the central axis at a certain helix angle. Each nanotube is a carbon atom through SP 2 A cylindrical surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 莫尊理邓哲鹏郭瑞斌冯超刘鹏伟孙万虹孙豫
Owner NORTHWEST NORMAL UNIVERSITY