Electrophotographic member and electrophotographic image forming apparatus
An electrophotographic member capable of further reducing adhesion of a toner to an outer surface. The electrophotographic member comprises a base layer and a surface layer laminated in this order in a thickness direction of the electrophotographic member, the surface layer containing a binder resin, perfluoropolyether, and an ionic liquid, a content of the perfluoropolyether with respect to the binder resin being 20% by mass or more and 100% by mass or less, and a contact angle of a surface on a side of the surface layer that is opposite to a side facing the base layer with respect to hexadecane being 65° or more.
1. An electrophotographic member comprising a base layer and a surface layer laminated in this order in a thickness direction of the electrophotographic member, the surface layer containing a binder resin, perfluoropolyether dispersed in the binder resin, and an ionic liquid,
a content of the perfluoropolyether with respect to the binder resin being 20% by mass or more and 100% by mass or less, and
the ionic liquid being constituted by a cation and an anion,
the anion being represented by the following Formula (1),
wherein m and n each independently represent an integer of 1 or more and 4 or less,
the cation being represented by the following formula (8),
wherein R 16 to R 18 each independently represent a hydrocarbon group having 1 to 8 carbon atoms, R 19 represents hydrogen or a methyl group, and I represents an integer of 1 or more and 8 or less,
wherein the ionic liquid is dispersed in the binder resin so that the cation of the ionic liquid interacts with the perfluoropolyether.
2. An electrophotographic member comprising a base layer and a surface layer laminated in this order in a thickness direction of the electrophotographic member,
the surface layer containing a binder resin, perfluoropolyether dispersed in the binder resin, and an ionic liquid constituted by a cation and an anion,
the ionic liquid being dispersed in the binder resin so that the cation in the ionic liquid interacts with the perfluoropolyether,
a content of the perfluoropolyether with respect to the binder resin being 20% by mass or more and 100% by mass or less, and
a contact angle of a surface on a side of the surface layer that is opposite to a side facing the base layer with respect to hexadecane being 65° or more,
wherein
the ionic liquid has an anion and a cation,
the anion being represented by the following Formula (1)
wherein m and n each independently represent an integer of 1 or more and 4 or less, and
the cation being represented by the following Formula (8):
wherein R 16 to R 18 each independently represent a hydrocarbon group having 1 to 8 carbon atoms, R 19 represents hydrogen or a methyl group, and I represents an integer of 1 or more and 8 or less.
3. The electrophotographic member according to claim 1 , wherein a content of the ionic liquid with respect to the perfluoropolyether is 25% by mass or more and 150% by mass or less.
4. The electrophotographic member according to claim 1 , wherein the binder resin is an acrylic resin.
5. The electrophotographic member according to claim 1 , wherein the electrophotographic member is an electrophotographic belt having an endless shape.
6. The electrophotographic member according to claim 5 , wherein the electrophotographic belt has grooves formed in a surface on a side of the surface layer that is opposite to a side facing the base layer.
7. The electrophotographic member according to claim 6 , wherein when a straight line is assumed to be placed on the surface in a direction orthogonal to a circumferential direction of the electrophotographic belt, the grooves intersect the straight line and extend in a direction non-parallel to the circumferential direction of the electrophotographic belt.
8. The electrophotographic member according to claim 7 , wherein the surface on the side of the surface layer that is opposite to the side facing the base layer is composed of only first regions in which a number of the grooves intersecting the straight line is n and second regions in which a number of the grooves intersecting the straight line is greater than n where n represents an integer of 1 or more, and
the first region and the second region are alternately disposed in the circumferential direction of the electrophotographic belt.
9. The electrophotographic member according to claim 5 , wherein the electrophotographic belt is an intermediate transfer belt.
10. An electrophotographic image forming apparatus comprising an electrophotographic member,
wherein the electrophotographic member comprises a base layer and a surface layer laminated in this order in a thickness direction of the electrophotographic member,
the surface layer contains a binder resin, perfluoropolyether dispersed in the binder resin, and an ionic liquid,
a content of the perfluoropolyether with respect to the binder resin is 20% by mass or more and 100% by mass or less, and
the ionic liquid being constituted by a cation and an anion,
the anion being represented by the following Formula (1),
wherein m and n each independently represent an integer of 1 or more and 4 or less, and wherein the ionic liquid is dispersed in the binder resin so that the cation in the ionic liquid interacts with the perfluoropolyether, and
the cation being represented by the following formula (8)
wherein R 16 to R 18 each independently represent a hydrocarbon group having 1 to 8 carbon atoms, R 19 represents hydrogen or a methyl group, and I represents an integer of 1 or more and 8 or less.
11. The electrophotographic image forming apparatus according to claim 10 , further comprising a cleaning member disposed in contact with a surface of the electrophotographic member on a side of the surface layer that is opposite to a side facing the base layer.