Tethered metal dioxide for imaging members
AssigneeXerox Corporation
InventorJin Wu
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Abstract
A photoreceptor comprises a conductive substrate. An undercoat layer is disposed on the conductive substrate. The undercoat layer includes modified metal oxide particles and a binder resin, the modified metal oxide particles comprising metal oxide particles having an outer surface and hygroscopic polymers attached to the surface. The hygroscopic polymers are made by linking a hydrophilic polymer group to the metal oxide particles using a dithiofunctionalized phosphonatomethylaryl ligand that acts as the linking group. A photosensitive layer is disposed on the undercoat layer.
Claims20
A photoreceptor comprising:
- a conductive substrate;
- an undercoat layer disposed on the conductive substrate, the undercoat layer including modified metal oxide particles and a binder resin, the modified metal oxide particles comprising metal oxide particles having an outer surface and hygroscopic polymers attached to the surface, wherein the hygroscopic polymers are made by linking a hydrophilic polymer group to the metal oxide particles using a dithiofunctionalized phosphonatomethylaryl ligand that acts as the linking group;
- and
- a photosensitive layer disposed on the undercoat layer.
A method of modifying an outer surface of a metal oxide particle comprising:
- mixing the metal oxide particle with a compound having a phosphonatomethylaryl moiety functionalized with a dithioester group, wherein the phosphonatomethylaryl moiety attaches to the outer surface to form a dithioester functionalized phosphonatomethylaryl ligand;
- and
- linking a hydrophilic polymer group to the metal oxide particle using the dithiofunctionalized phosphonatomethylaryl ligand as a linking group to form a hygroscopic polymer.
A modified metal oxide particle having an outer surface and hygroscopic polymer attached to the surface, the modified metal oxide particle made by the method comprising:
- mixing a metal oxide particle having an outer surface with a compound having a phosphonatomethylaryl moiety functionalized with a dithioester group, wherein the phosphonatomethylaryl moiety attaches to the outer surface to form a dithioester functionalized phosphonatomethylaryl ligand;
- and
- linking a hydrophilic polymer group to the metal oxide particle using the dithiofunctionalized phosphonatomethylaryl ligand as a linking group to form the hygroscopic polymer.
Dependencies are inferred from the claim text.