Fluorinated structured organic film photoreceptor layers containing fluorinated secondary components
A imaging member, such as a photoreceptor, having an outermost layer that is a structured organic film (SOF) comprising a plurality of segments and a plurality of linkers including a first fluorinated segment, a second electroactive segment and fluorinated secondary components.
1. An imaging member comprising:
a substrate;
a charge generating layer;
a charge transport layer; and
an optional overcoat layer, wherein the outermost layer is an imaging surface that comprises a structured organic film (SOF) comprising a plurality of segments and a plurality of linkers including a first fluorinated segment, a second electroactive segment and fluorinated secondary components having a size in the range of from 100 nm to 5000 nm.
2. The imaging member of claim 1 , wherein the fluorinated secondary components are selected from a group consisting of polytetrafluoroethylene (PTFE), perfluoroalkoxy polymer resin (PFA), a copolymers of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP), a copolymers of hexafluoropropylene (HFP) and vinylidene fluoride (VDF), a copolymers of hexafluoropropylene (HFP) and vinylidene fluoride (VF2), a terpolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VDF), and hexafluoropropylene (HFP), and a tetrapolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VF2), hexafluoropropylene (HFP), and mixtures thereof.
3. The imaging member of claim 1 , wherein the fluorinated secondary components comprise polytetrafluoroethylene (PTFE) particles.
4. The imaging member of claim 1 , wherein the outermost layer is an overcoat layer, and the overcoat layer is from about 2 to about 10 microns thick.
5. The imaging member of claim 1 , wherein the outermost layer is a charge transport layer, and the charge transport layer is from about 15 to about 40 microns thick.
6. The imaging member of claim 1 , wherein the outmost layer is a capped SOF.
7. The imaging member of claim 6 , wherein the capped SOF comprises a capping group is obtained from a fluorinated alcohol having from about 5 to about 60 carbon atoms, or at least one compound of the general formula CF 3 (CF 2 ) x (OH) where x is in the range of from about 5 to about 60.
8. The imaging member of claim 1 , wherein the first fluorinated segment is present in the SOF of the outermost layer in an amount from about 15% to about 60% by weight of the SOF.
9. The imaging member of claim 1 , wherein the second electroactive segment is selected from the group consisting of N,N,N′,N′-tetra-(p-tolyl)biphenyl-4,4′-diamine:
and N4,N4′-bis(3,4-dimethylphenyl)-N4,N4′-di-p-tolyl-[1,1′-biphenyl]-4,4′-diamine:
and tris (4 hydroxymethyl)triphenylamine:
10. The imaging member of claim 1 , wherein second electroactive segment is present in the SOF of the outermost layer in an amount from about 20% to about 75% by weight of the SOF.
11. The imaging member of claim 1 , wherein the fluorine content of the SOF is from about 20% to about 65% by weight of the SOF.
12. The imaging member of claim 1 , wherein the first fluorinated segment and the second electroactive segment are present in the SOF of the outermost layer in an amount of from about 65% to about 97% by weight of the SOF.
13. The imaging member of claim 1 , wherein the fluorinated secondary components are present in the SOF in an amount up to about 35% by weight of the SOF.
14. The imaging member of claim 1 , wherein the SOF further comprises a secondary component selected from the group consisting of melamine/formaldehyde compounds, and melamine/formaldehyde resins in an amount from about 1 up to about 35 percent by weight of the SOF.
15. The imaging member of claim 14 , wherein the fluorinated secondary components are fluorinated particles with a fluoro-polymer core and a shell comprising melamine resins, formaldehyde resins, or a combination thereof.
16. The imaging member of claim 15 , wherein the fluoro-polymer core is selected from the group consisting of polytetrafluoroethylene, perfluoroalkoxy polymer resin, a copolymer of tetrafluoroethylene and hexafluoropropylene, a copolymers of hexafluoropropylene and vinylidene fluoride, a copolymers of hexafluoropropylene and vinylidene fluoride, a terpolymers of tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene, and a tetrapolymers of tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene.
17. A xerographic apparatus comprising the imaging member of claim 1 , wherein the imaging member possesses a wear rate of from about 1 to about 30 nanometers per kilocycle rotation.
18. The imaging member of claim 1 , wherein the first fluorinated segment is obtained from a fluorinated building block selected from the group consisting of 2,2,3,3,4,4,5,5-octafluoro-1,6-hexanediol, 2,2,3,3,4,4,5,5,6,6,7,7-dodecanfluoro-1,8-octanediol, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9-perfluorodecane-1,10-diol, and 2,2,3,3,4,4,5,5,6,6,7,7,8,8-tetradecafluoro-1,9-nonanediol.
19. The imaging member of claim 1 , comprising an overcoat layer, wherein the ratio of the first fluorinated segment to the second electroactive segment is from about 3.5:1 to about 0.5:1.