Granted Patent B1

US 9,011,594 · App. 14/041,508 · Granted Apr 21, 2015

Abstract

Claims (30)

1. A method for forming functionalized carbon black useful for uniform dispersion in a surface material of printing system components, comprising:

providing carbon black;

providing a fluoropolymer having a terminal amino group; and

mixing the amino-terminated fluoropolymer and the carbon black, wherein in the fluoropolymer is amino-terminated PDMS;

providing nitric acid;

mixing the carbon black with the nitric acid to oxidize a surface of the carbon black whereby oxidized carbon black is formed;

washing the oxidized carbon black with deionized water until a pH of the carbon black in solution is 5;

drying the carbon black using vacuum at 150 degrees Celsius for one hour;

the mixing the amino-terminated fluoropolymer and the carbon black further comprising the carbon black being the vacuum dried, oxidized carbon black, the amount of dried, oxidized carbon black lying in a range of 0.5 g to 1.0 g, the amount of amino-terminated fluoropolymer being 10 g, and an amount of the coupling agent being 1 g.

2. The method of claim 1 , comprising:

providing a coupling agent for the mixing.

3. The method of claim 2 , wherein the coupling agent is N,N′-dicyclohexylcarbodiimide.

4. The method of claim 1 , wherein the mixing carbon black with the nitric acid comprises mixing for seven hours.

5. The method of claim 1 , wherein the mixing carbon black with the nitric acid comprises mixing at room temperature.

6. The method of claim 1 , comprising:

mixing trifluorotoluene with the dried, oxidized carbon black before adding the amino-terminated fluoropolymer to the carbon black and the coupling agent.

7. The method of claim 6 , comprising:

washing the functionalized carbon black with trifluorotoluene for removing residual EF and/or coupling agent; and

evaporating the trifluorotoluene after the washing.

8. The method of claim 7 , comprising the washing being conducted using an ultracentrifuge.

9. The method of claim 7 , comprising the evaporating being conducted using a vacuum oven.

10. A method for forming an imaging member having a functionalized carbon black filler component in a surface thereof, comprising:

providing carbon black;

providing a fluoropolymer having a terminal amino group; and

mixing the amino-terminated fluoropolymer and the carbon black, wherein in the fluoropolymer is amino-terminated PDMS;

providing nitric acid;

mixing the carbon black with the nitric acid to oxidize a surface of the carbon black whereby oxidized carbon black is formed;

washing the oxidized carbon black with deionized water until a pH of the carbon black in solution is 5;

drying the carbon black using vacuum at 150 degrees Celsius for one hour;

the mixing the amino-terminated fluoropolymer and the carbon black further comprising the carbon black being the vacuum dried, oxidized carbon black, the amount of dried, oxidized carbon black lying in a range of 0.5 g to 1.0 g, the amount of amino-terminated fluoropolymer being 10 g, and an amount of the coupling agent being 1 g.

Assignments (10)