Method of manufacturing electrophoretic particle, electrophoretic particle, electrophoretic dispersion liquid, electrophoretic sheet, electrophoretic device, and electronic apparatus
A method of manufacturing an electrophoretic particle is a method of manufacturing an electrophoretic particle including a particle and a particle surface treatment agent which is bonded to the particle, the method including preparing a mixture containing a plurality of the particles, the particle surface treatment agent, an unreacted product of a raw material used at the time of generating the particle surface treatment agent, and a reaction by-product generated at the time of generating the particle surface treatment agent, the mixture having a content of the particle surface treatment agent which is set to be equal to or greater than 70% by weight in the mixture except for the plurality of particles; and bonding the particle surface treatment agent to a surface of the particle in the mixture.
1. A method of manufacturing an electrophoretic particle which includes a particle, and a particle surface treatment agent which is bonded to the particle, the method comprising:
preparing a mixture containing a plurality of the particles, the particle surface treatment agent, an unreacted product of a raw material used at the time of generating the particle surface treatment agent, and a reaction by-product generated at the time of generating the particle surface treatment agent, the mixture having a content of the particle surface treatment agent which is set to be equal to or greater than 70% by weight in the mixture except for the plurality of particles; and
bonding the particle surface treatment agent to the particle in the mixture,
wherein the particle surface treatment agent is a block copolymer which contains a dispersion portion which is formed by polymerizing first monomers and a bonding portion which is formed by polymerizing second monomers having a functional group, and is bonded to the particle when the functional group is reacted in the bonding portion, and
wherein the first monomer is a silicone macromonomer expressed by the following Formula (I)
In the formula, R 1 represents a hydrogen atom or a methyl group, R 2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R 3 represents a structure including one of an alkyl group having 1 to 6 carbon atoms and an ether group of ethylene oxide or propylene oxide, and n represents an integer of 0 or greater].
2. The method of manufacturing an electrophoretic particle according to claim 1 ,
wherein in the preparing of the mixture, a solvent for dissolving the particle surface treatment agent is not added into the mixture.
3. The method of manufacturing an electrophoretic particle according to claim 1 ,
wherein weight-average molecular weight of each of the unreacted product and the reaction by-product is in a range of 1,000 to 50,000.
4. The method of manufacturing an electrophoretic particle according to claim 1 ,
wherein the unreacted product and the reaction by-product are respectively an unreacted product of a raw material at the time of generating the first monomer and a reaction by-product at the time of generating the first monomer.
5. An electrophoretic particle made according to the method of claim 1
wherein when a weight of the particle is set to be 100% by weight, the weight of the particle surface treatment agent is in a range of 4% by weight to 8% by weight.
6. An electrophoretic dispersion liquid comprising:
the electrophoretic particle according to claim 5 ; and
a dispersion medium.
7. An electrophoretic sheet comprising:
a substrate; and
a structure body which is provided on the substrate and accommodates the electrophoretic dispersion liquid according to claim 6 .
8. An electrophoretic device comprising the electrophoretic sheet according to claim 7 .
9. An electronic apparatus comprising the electrophoretic device according to claim 8 .