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Preparation method of compound film used for field emission display equipment

A composite thin film and display device technology, which is applied in cold cathode manufacturing, electrode system manufacturing, discharge tube/lamp manufacturing, etc., can solve the problem of low composite amount of carbon nanotubes, poor compatibility of carbon nanotubes, poor thermomechanical properties, etc. problems, to achieve good thermomechanical properties and chemical stability

Inactive Publication Date: 2009-02-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel-based, silver-based and other materials are relatively good in terms of thermomechanical properties and chemical stability, but their compatibility with carbon nanotubes is poor. Nickel is easy to deposit on the surface or tip of carbon nanotubes, forming a beaded structure and affecting electron emission. , at the same time, the surface roughness of the coating is poor, and the composite amount of carbon nanotubes is small
Although zinc-based has good compatibility with carbon nanotubes, its chemical properties are relatively active and its thermomechanical properties are poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation process of nickel / carbon nanotube composite film is as follows:

[0043] 1. Pretreatment of carbon nanotubes:

[0044] Specifications of multi-walled carbon nanotubes: The selected multi-walled carbon nanotubes have a diameter of 10-20nm and a length of 5-15um.

[0045] (1) Molten potassium hydroxide treatment, temperature 300 ℃, time 4 hours, deionized water washing, centrifugation;

[0046] (2) Mix and boil with sulfuric acid (95%~98%) and nitric acid (65%~68%) for 5 hours;

[0047] (3) Wash with deionized water until neutral, and then separate with a high-speed centrifuge.

[0048] After pretreatment, the end of the nanotube structure is open, the purity is more than 95%, and the length is less than or equal to 10 μm.

[0049] 2. Add the pretreated nanotubes into the zinc basic plating solution according to the following content, and ultrasonically treat for 1 hour;

[0050] 3. Composite electrodeposition

[0051] The zinc plate is selected as th...

Embodiment 2

[0072] The preparation process of silver / carbon nanotube composite film is as follows:

[0073] 1. Pretreatment of carbon nanotubes:

[0074] Specifications of multi-walled carbon nanotubes: The selected multi-walled carbon nanotubes have a diameter of 10-20nm and a length of 5-15um.

[0075] (1) Molten potassium hydroxide treatment, temperature 300 ℃, time 4 hours, deionized water washing, centrifugation;

[0076] (2) Mix and boil with sulfuric acid (95%~98%) and nitric acid (65%~68%) for 5 hours;

[0077] (3) Wash with deionized water until neutral, and then separate with a high-speed centrifuge.

[0078] After pretreatment, the end of the nanotube structure is open, the purity is more than 95%, and the length is less than or equal to 10 μm.

[0079] 2. Add the pretreated multi-walled carbon nanotubes into the basic zinc plating solution according to the following content, and perform ultrasonic treatment for 1 hour.

[0080] 3. Composite electrodeposition

[0081] The ...

Embodiment 3

[0101] The preparation process of copper / carbon nanofiber composite film is as follows:

[0102] 1. Pretreatment of carbon nanofibers:

[0103] Carbon nanofiber specifications: average diameter 60-100nm, length 15-20μm.

[0104] (1) Molten potassium hydroxide treatment, temperature 300 ℃, time 4 hours, deionized water washing, centrifugation;

[0105] (2) Mix and boil with sulfuric acid (95%~98%) and nitric acid (65%~68%) for 5 hours;

[0106] (3) Wash with deionized water until neutral, and then separate with a high-speed centrifuge.

[0107] After pretreatment, the purity of CNF is ≥95%.

[0108] 2. Add the pretreated carbon nanofiber tubes into the zinc basic plating solution according to the following content, and perform ultrasonic treatment for 1 hour.

[0109] 3. Composite electrodeposition

[0110] The zinc plate is selected as the anode plate, and the cathode plate of the field emission display is used as the cathode.

[0111] The electroplating process paramete...

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Abstract

The invention relates to a method for preparing a composite film for a cathode of a field transmission display device, belonging to nano material technical field, the method comprises preprocessing CNT and CNF, performing cut short, purification and surface modification for CNT and CNF; dispersing CNT or CNF in the base bath electroplated by Zn; depositing a Zn base carbon nano tube composite film and a Zi base carbon nano fiber composite film; leveling up the composite film using polishing and burnishing process; performing chemical etching for the composite film by an etching agent; depositing a seed layer electroplated by copper and chromium; electroplating required base metals (nickel, silver, gold and copper or the like); planting one part of CNT or CNF formed by muriate acid Zn, exposing the rest parts of that outside and evenly distributing the rest parts on the surface layer of the electrode for presenting ''planting cloth'' effect. The invention can be used for preparing high-performance field transmission devices.

Description

technical field [0001] The present invention relates to a method for preparing a composite film in the technical field of nanomaterials, in particular to a method for preparing a composite film for a cathode of a field emission display device. Background technique [0002] Field emission display devices using high-performance field emission materials as cold cathode electron emission sources have both the advantages of high display quality of cathode ray tubes and low power consumption of liquid crystal displays, and are expected to become a new generation of image display devices that can replace traditional displays. Among various field emitters, carbon nanotubes (CNTs) and carbon nanofibers (CNFs) are more suitable for field emission applications than traditional materials due to their unique electronic, mechanical, and chemical properties. Carbon nanotube (CNT) is a new type of one-dimensional nanomaterial with extremely high comprehensive performance. It is known as an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/02
Inventor 丁桂甫诸利达姚锦元王艳邓敏
Owner SHANGHAI JIAO TONG UNIV
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