Method for preparing metallized carbon nanotube cathode by electrophoretic deposition in assistance of magnetic field
A technology of electrophoretic deposition and metallized carbon, which is applied in the manufacture of discharge tubes/lamps, cold cathodes, and electrode systems. It can solve the problem of low adhesion between carbon nanotubes and substrates, and increase the emission of cutting-edge electrons. ability, increase stability, and reduce the effect of reunion chance
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Embodiment 1
[0018] This embodiment provides a method for preparing a nickel-coated carbon nanotube cathode on a surface assisted by electrophoretic deposition. The following will be described in combination with specific implementation steps. figure 1 Schematic diagram of deposition of metallized carbon nanotube cathodes for magnetic field-assisted electrophoresis
[0019] 1) Pretreatment of carbon nanotubes before electrophoresis
[0020] (1) Purify, sensitize, and activate carbon nanotubes;
[0021] (2) A uniform magnetic metal nickel layer is deposited on the surface of carbon nanotubes by electroless plating;
[0022] 2) Preparation of carbon nanotube electrophoretic fluid
[0023] Preparation of organic slurry: first take ethyl cellulose ([C 6 h 7 o 2 (OC 2 h 5 ) 3 ] n ) 10 g, terpineol (C 10 h 18 O) 500 mL and 2 g of polyvinylpyrrolidone were mixed together at a temperature of 80 °C, and stirred by magnetic heating for 4 h, so that various materials were evenly mixed. ...
Embodiment 2
[0028] This embodiment provides a method for preparing a carbon nanotube cathode coated with an iron-cobalt composite magnetic metal layer on the surface by magnetic field-assisted pulse electrophoretic deposition. The following will be described in combination with specific implementation steps.
[0029] 1) Pretreatment of carbon nanotubes
[0030] (1) Purify, sensitize, and activate carbon nanotubes;
[0031] (2) A uniform iron-cobalt composite magnetic metal layer is deposited on the surface of carbon nanotubes by evaporation coating method.
[0032] 2) Preparation of carbon nanotube electrophoretic fluid
[0033] Get the carbon nanotube of 50 mg surface plating iron-cobalt composite magnetic metal layer and 25mg magnesium nitrate hexahydrate (Mg(NO 3 )·6H 2 O) Disperse in 250ml of isopropanol, and ultrasonically disperse in an ultrasonic cell pulverizer for 1 hour to obtain a uniform surface metallized carbon nanotube dispersion (0.2mg / ml).
[0034] 3) Preparation o...
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