1. A graphene derivative, characterized in that it is represented by the following formula (I):
wherein:
A represents a graphene substrate;
n represents the number of the group represented by the following formula (II) and is a positive integer equal to or less than a half (\xbd) of the total number of carbon atoms in the graphene substrate:
wherein each group represented by formula (II) is connected to adjacent two carbon atoms of a carbon ring of the graphene substrate, and each carbon atom of the graphene substrate connects with at most one group represented by formula (II);
each X independently represents \u2014NO2 or \u2014CN; and
each R independently represents any one of \u2014R1, \u2014R2, \u2014O\u2014R1, \u2014O\u2014R2, \u2014R1\u2014C6H5, \u2014R2\u2014C6H5, and \u2014R3, wherein each R1 is independently an n-alkyl group having no less than 5 carbon atoms, each R2 is independently a substituted n-alkyl group having no less than 5 carbon atoms in its main chain and having an alkyl substituent, the C6H5 represents a phenyl group which is connected to the end of R1 or R2, and R3 is an aryl group.
2. The graphene derivative according to claim 1, characterized in that the number of the carbon atoms of the graphene substrate is between 500 and 10000.
3. The graphene derivative according to claim 1, characterized in that the group represented by formula II is a group represented by the following formula IIa:
4. The graphene derivative according to claim 1, characterized in that,
the number of carbon atoms of R1 ranges from 5 to 20;
the number of carbon atoms in the main chain of R2 ranges from 5 to 20, wherein the alkyl substituent is a methyl or ethyl and is connected to the carbon atom at 2-position or 3-position of the main chain of R2; and
the number of ring carbon atoms in R3 ranges from 6 to 24.
5. The graphene derivative according to claim 4, characterized in that,
R3 is one selected from the group consisting of phenyl, 1-naphthyl, 2-naphthyl, 1-anthryl, 2-anthryl, 9-anthryl, 1-phenanthryl, 2-phenanthryl, 3-phenanthryl, 4-phenanthryl, 9-phenanthryl, 1-tetracenyl, 2-tetracenyl, 9-tetracenyl, 1-pyrenyl, 2-pyrenyl, 4-pyrenyl, 2-biphenyl, 3-biphenyl, 4-biphenyl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-2-yl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, o-tolyl, m-tolyl, p-tolyl, p-tert-butyl-phenyl, p-(2-phenylpropyl)phenyl, 3-methyl-2-naphthyl, 4-methyl-1-naphthyl, 4-methyl-1-anthryl, 4\u2032-methyl-biphenyl, and 4\u2033-tert-butyl-p-terphenyl-4-yl.
6. A method of preparing a graphene derivative represented by formula (I):
wherein:
A represents a graphene substrate;
n represents the number of the group represented by the following formula (II) and is a positive integer equal to or less than a half (\xbd) of the total number of carbon atoms in the graphene substrate:
wherein each group represented by formula (II) is connected to adjacent two carbon atoms of a carbon ring of the graphene substrate, and each carbon atom of the graphene substrate connects with at most one group represented by formula (II);
each X independently represents an electron-withdrawing group; and
each R independently represents any one of \u2014R1, \u2014R2, \u2014O\u2014R1, \u2014O\u2014R2, \u2014R1\u2014C6H5, \u2014R2\u2014C6H5, and \u2014R3, wherein each R1 is independently an n-alkyl group having no less than 5 carbon atoms, each R2 is independently a substituted n-alkyl group having no less than 5 carbon atoms in its main chain and having an alkyl substituent, the C6H5 represents a phenyl group which is connected to the end of R1 or R2, and R3 is an aryl group,
characterized in that the method comprises the following steps:
dispersing a graphene in a solvent to form a dispersion, and then mixing the dispersion with N-methyl glycine and a substituted benzaldehyde represented by the following formula to form a reaction mixture,
wherein the definitions of R and X are the same as described above with respect to the formula (I), respectively; and
heating the reaction mixture to a reaction temperature and maintaining the mixture under the temperature to effect reaction, thereby obtaining the graphene derivative.
7. The method according to claim 6, characterized in that the graphene is a powder of a monolayer graphene having a particle size of 200 nm to 1000 nm.
8. The method according to claim 6, characterized in that the solvent is selected from the group consisting of toluene, dioxane, tetrahydrofuran, nitrobenzene, and dichloroethane.
9. The method according to claim 6, characterized in that the molar ratio of the graphene carbon atoms, N-methyl glycine, and substituted benzaldehyde is 1:(1.5 to 5.5):(2 to 12).
10. The method according to claim 6, characterized in that the reaction mixture is heated to a temperature of 60 to 150\xb0 C., and maintained at the temperature for 8 to 20 hours.
11. The method according to claim 6, characterized in that the method further comprises:
separating the graphene derivative from the reaction mixture by a chromatography process.
12. A transparent conductive film, characterized in that the film comprises the graphene derivative according to claim 1.
13. An organic electroluminescent device, including an anode layer, an organic electroluminescent layer, and a cathode layer, characterized in that
said anode layer comprises the graphene derivative according to claim 1.
14. A method of preparing an anode layer on a substrate of an organic electroluminescent device, characterized in that:
the graphene derivative according to claim 1 is deposited onto the substrate by a vacuum evaporation at a temperature of 330 to 370\xb0 C.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A fluid-sealed anti-vibration device comprising:
a first connecting member secured to a source of vibration;
a second connecting member secured to a car body;
an substantially cone-shaped elastic body member positioned therebetween;
a fluid chamber which is formed by the first connecting member, the second connecting member, and the elastic body member, and of which the wall is a part of the elastic body member;
the fluid chamber being divided by a partition wall into a main fluid chamber and a sub-fluid chamber; and
an orifice formed in the partition wall to communicate with the main fluid chamber and the sub-fluid chamber;
characterized in that an elastic, horizontally movable membrane is provided in a side wall member which encloses the main fluid chamber in a substantially cylindrical manner, and a control wall is provided in the main fluid chamber to face the horizontal movable membrane at intervals.
2. The fluid-sealed anti-vibration device according to claim 1, wherein the horizontal movable membrane is integrally formed with the elastic body member.
3. The fluid-sealed anti-vibration device according to claim 1, wherein the control wall is formed integrally with or separately from a partition member.
4. The fluid-sealed anti-vibration device according to claim 1, wherein a plurality of horizontal movable membrane is provided and an eigen value of each horizontal movable membrane is changed.
5. The fluid-sealed anti-vibration device according to claim 1, wherein a circular wall is formed inside the side wall member to face the side wall member at intervals, space provided between the circular wall and the side wall member opens to the main fluid chamber, and a part of the circular wall facing the horizontal movable membrane is the control wall.
6. A fluid-sealed anti-vibration device according to claim 1, wherein an elastic membrane is provided on the partition member, adapted to be elastically deformed as a result fluctuation of internal pressure in the main fluid chamber and formed as a non-circular member with a long side section and a short side section and provided in the central part thereof with a curved groove running substantially parallel to the long side section.
7. The fluid-sealed anti-vibration device according to claim 6, wherein the elastic membrane is integrally provided with a stopper projection on the reverse side of and substantially parallel to the curved groove, and the stopper projection is formed only on the long side section of the elastic membrane.
8. The fluid-sealed anti-vibration device according to claim 6, wherein a periphery of the elastic membrane is integrally formed with a continuous circular peripheral wall that is retained by the partition member, and a clearance is provided at the retaining section by the partition member to permit deformation of the peripheral wall.
9. The fluid-sealed anti-vibration device according to claim 6, wherein the partition member is provided with first to third orifice passages, of which the first orifice passage is the damping orifice passage for always communicating with the main fluid chamber and the sub-fluid chamber, the second orifice passage can be freely opened and closed, and the third orifice passage, of which part is covered by the elastic membrane which is elastically deformable to shut off the communication with the main fluid chamber and the sub-fluid chamber, and the elastic membrane is formed as the non-circular member.