Scratch-resistant and durable electrophotographic photoreceptor
An electrophotographic photoreceptor, which includes a conductive substrate; an undercoat layer disposed on the conductive substrate and capable of conforming to the contour of the conductive substrate, a photoconductor charge generation layer disposed on the undercoat layer and capable of conforming to the contour of the undercoat layer, and a charge transport layer disposed on the photoconductor charge generation layer. The charge transport layer contains a charge transport material, a binder resin, a fluorine-containing resin, and a plurality of polyhedral oligomeric silsesquioxane (POSS) particles evenly dispersed in the binder resin, and the POSS particles are interconnected with at least one fluorine group and at least two non-fluoridated groups. By adding approximately 1% of the POSS particles and lubricant nanoparticles, a life-time improvement of at least 20% is achieved for an OPC drum.
1 . A scratch-resistant and durable electrophotographic photoreceptor, comprising:
a conductive substrate;
an undercoat layer disposed on the conductive substrate and capable of conforming to the contour of the conductive substrate;
a photoconductor charge generation layer disposed on the undercoat layer and capable of conforming to the contour of the undercoat layer; and
a charge transport layer disposed on the photoconductor charge generation layer, wherein the charge transport layer comprises a charge transport material, a binder resin, a fluorine-containing resin, and a plurality of polyhedral oligomeric silsesquioxane (POSS) particles evenly dispersed in the binder resin;
wherein the POSS particles have a structure represented by Formula (1-1) or Formula (1-2):
R a R 1 SiO 3/2 Formula (1-1)
R a R 1 R 2 SiO 3/2 Formula (1-2);
wherein R a represents at least one fluorine group selected from the group consisting of 12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19,19-heptadecafluorononadecyl, 12, 12, 13,13, 14, 14, 15, 15,15-nonafluoropentadecyl, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17-tridecafluoroheptadecyl, 12,12,13,13,14,14,15,15,15-nonafluoropentadecyl, 12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19,19-heptadecafluorononadecyl, 12,12,13,13,14,14,15,15,16,16,17,17,17-tridecafluoroheptadecyl, 3,3,3-trifluoropropyl, heptadecafluorodecyl, tridecafluorooctyl, 3,3,3-trifluoropropyl, 1H, 1H,2H,2H-perfluorodecyl, heptadecafluorooctyl, heptadecafluoro-1,1,2,2-tetradecyl, and tridecafluoro-1,1,2,2-tetrahydrooctyl;
wherein R 1 represents a first non-fluoridated group, and R 2 represents a second non-fluoridated group;
wherein the second non-fluoridated group has a long chain of CH 2 of more than 1CH 2 ;
wherein the first non-fluoridated group is selected from the group consisting of propyl methacrylate, propylaniline, phenyl, 2-phenylethyl, 1-phenylethenyl, methylphenyl group, and diphenyl group; and
wherein the second non-fluoridated group is selected from the group consisting of octadecyl, dodecyl, and polyethylene glycol (PEG).
2 . The scratch-resistant and durable electrophotographic photoreceptor of claim 1 , wherein the charge transport material is selected from the group consisting of polycyclic aromatic compounds, heterocyclic compounds, hydrazone compounds, styryl compounds, enamine compounds, benzidine compounds and triarylamine compounds.
3 . The scratch-resistant and durable electrophotographic photoreceptor of claim 1 , wherein the binder resin is selected from the group consisting of polyester resin, a polycarbonate resin, an acryl resin and a polystyrene resin.
4 . The scratch-resistant and durable electrophotographic photoreceptor of claim 1 , wherein the fluorine-containing resin is selected from the group consisting of tetrafluoroethylene resin, trifluorochloroethylene resins, vinyl fluoride resins, vinylidene fluoride resins, difluorodichloroethylene resins and copolymers thereof.
5 . The scratch-resistant and durable electrophotographic photoreceptor of claim 1 , wherein a content of the fluorine-containing POSS in the charge transport layer ranges from 0.1% to 20% by mass.
6 . The scratch-resistant and durable electrophotographic photoreceptor of claim 1 , wherein the undercoat layer has a thickness in a range of 15 μm to 50 μm, the photoconductor charge generation layer has a thickness in a range of 0.1 μm to 1 μm, and the charge transport layer has a thickness in a range of 5 to 50 μm.
7 . A scratch-resistant and durable electrophotographic photoreceptor,
comprising:
a conductive substrate;
an undercoat layer disposed on the conductive substrate and capable of conforming to the contour of the conductive substrate;
a photoconductor charge generation layer disposed on the undercoat layer and capable of conforming to the contour of the undercoat layer;
a charge transport layer disposed on the photoconductor charge generation layer, wherein the charge transport layer comprises a charge transport material, a binder resin; and
an overcoat layer disposed on the charge transport layer, wherein the overcoat layer comprises a fluorine-containing resin and a plurality of polyhedral oligomeric silsesquioxane (POSS) particles evenly dispersed in the fluorine-containing resin;
wherein the scratch-resistant and durable electrophotographic photoreceptor has a durability of below 1.0 um/10000 page printing, as determined by standard page printing test according to ISO/IEC 19752;
wherein the POSS particles have a structure represented by Formula (1-1) or Formula (1-2):
R a R 1 SiO 3/2 Formula (1-1)
R a R 1 R 2 SiO 3/2 Formula (1-2);
wherein R a represents at least one fluorine group selected from the group consisting of 12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19,19-heptadecafluorononadecyl, 12,12, 13, 13, 14, 14, 15, 15, 15-nonafluoropentadecyl, 12,12,13,13,14,14,15,15,16,16,17,17,17-tridecafluoroheptadecyl, 12,12,13,13,14, 14, 15,15, 15-nonafluoropentadecyl, 12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19,19-heptadecafluorononadecyl, 12,12,13,13,14,14,15,15,16,16,17,17,17-tridecafluoroheptadecyl, 3,3,3-trifluoropropyl, heptadecafluorodecyl, tridecafluorooctyl, 3,3,3-trifluoropropyl, 1H, 1H,2H,2H-perfluorodecyl, heptadecafluorooctyl, heptadecafluoro-1,1,2,2-tetradecyl, and tridecafluoro-1,1,2,2-tetrahydrooctyl;
wherein R 1 represents a first non-fluoridated group, and R 2 represents a second non-fluoridated group;
wherein the second non-fluoridated group has a long chain of CH 2 of more than 1CH 2 ;
wherein the first non-fluoridated group is selected from the group consisting of propyl methacrylate, propylaniline, phenyl, 2-phenylethyl, 1-phenylethenyl, methylphenyl group, and diphenyl group; and
wherein the second non-fluoridated group is selected from the group consisting of octadecyl, dodecyl, and polyethylene glycol (PEG).
8 . The scratch-resistant and durable electrophotographic photoreceptor of claim 7 , wherein the charge transport material is selected from the group consisting of polycyclic aromatic compounds, heterocyclic compounds, hydrazone compounds, styryl compounds, enamine compounds, benzidine compounds and triarylamine compounds.
9 . The scratch-resistant and durable electrophotographic photoreceptor of claim 7 , wherein the binder resin is selected from the group consisting of polyester resin, a polycarbonate resin, an acryl resin and a polystyrene resin.
10 . The scratch-resistant and durable electrophotographic photoreceptor of claim 7 , wherein the fluorine-containing resin is selected from the group consisting of tetrafluoroethylene resin, trifluorochloroethylene resins, vinyl fluoride resins, vinylidene fluoride resins, difluorodichloroethylene resins and copolymers thereof.
11 . The scratch-resistant and durable electrophotographic photoreceptor of claim 7 , wherein a content of the fluorine-containing POSS in the charge transport layer ranges from 0.1% to 20% by mass.
12 . The scratch-resistant and durable electrophotographic photoreceptor of claim 7 , wherein the undercoat layer has a thickness in a range of 15 μm to 50 μm, the photoconductor charge generation layer has a thickness in a range of 0.1 μm to 1 μm, the charge transport layer has a thickness in a range of 5 to 50 μm, and the overcoat layer has a thickness in a range of 5 to 50 um.