Nanocomposite, method of preparing the same, and surface light emitting device using the same

A method of preparing a nanocomposite comprising:

• modifying a surface of an inorganic oxide nanoparticle with a silane coupling agent having an amino group, represented by General Formula 1, or a phosphate ester compound having an amino group, represented by General Formula 2;
• imidizing at least a portion of the amino groups to produce an inorganic oxide nanoparticle having a surface modified with a first functional group having an imide backbone,
• modifying the surface of the inorganic oxide nanoparticle with a second functional group to obtain a surface-modified inorganic oxide nanoparticle comprising the inorganic oxide nanoparticle and the first functional group and the second functional group modifying the surface of the inorganic oxide nanoparticle;
• and
• mixing the surface-modified inorganic oxide nanoparticle with a polyamic acid and treating with heat the resulting mixture of the surface-modified inorganic oxide nanoparticle and the polyamic acid
• wherein,
• in General Formula 1, R1 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, R2 is a hydrogen atom or a substituted or unsubstituted C1 through C10 alkyl group, R3 is a substituted or unsubstituted C1 through C10 alkyl group or a substituted or unsubstituted C1 through C10 alkoxy group, and R4 is a substituted or unsubstituted C1 through C10 alkyl group, and
• in General Formula 2, R5 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, and R6 is a substituted or unsubstituted C1 through C10 alkyl group.

A method of preparing a nanocomposite comprising:

• imidizing at least a portion of amino groups included in a silane coupling agent, represented by General Formula 1, or a phosphate ester compound, represented by General Formula 2, to obtain a silane coupling agent or a phosphate ester compound having an imide backbone;
• binding the silane coupling agent or the phosphate ester compound having an imide backbone to a surface of an inorganic oxide nanoparticle to obtain an inorganic oxide nanoparticle having a surface modified with a first functional group having the imide backbone;
• modifying the surface of the inorganic oxide nanoparticle with a second functional group having an epoxy group to obtain a surface-modified inorganic oxide nanoparticle comprising the inorganic oxide nanoparticle and the first functional group and the second functional group modifying the surface of the inorganic oxide nanoparticle;
• and
• mixing the surface-modified inorganic oxide nanoparticle with a polyamic acid and treating with heat the resulting mixture of the surface-modified inorganic oxide nanoparticle and the polyamic acid
• wherein
• in General Formula 1, R1 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, R2 is a hydrogen atom or a substituted or unsubstituted C1 through C10 alkyl group, R3 is a substituted or unsubstituted C1 through C10 alkyl group or a substituted or unsubstituted C1 through C10 alkoxy group, and R4 is a substituted or unsubstituted C1 through C10 alkyl group, and
• in General Formula 2, R5 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, and R6 is a substituted or unsubstituted C1 through C10 alkyl group.

A method of preparing a nanocomposite comprising:

• modifying a surface of an inorganic oxide nanoparticle with a silane coupling agent having an amino group, represented by General Formula 1, or a phosphate ester compound having an amino group, represented by General Formula 2;
• imidizing at least a portion of the amino groups to produce an inorganic oxide nanoparticle having a surface modified with a first functional group having an imide backbone;
• modifying the surface of the inorganic oxide nanoparticle with a second functional group having an epoxy group to produce a surface-modified inorganic oxide nanoparticle comprising the inorganic oxide nanoparticle and a first functional group and a second functional group modifying the surface of the inorganic oxide nanoparticle;
• and
• mixing the surface-modified inorganic oxide nanoparticle with a diamine and an acid dianhydride and reacting the diamine and the acid dianhydride to produce a mixture of the surface-modified inorganic oxide nanoparticle and a polyamic acid, and treating with heat the resulting mixture
• wherein
• in General Formula 1, R1 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, R2 is a hydrogen atom or a substituted or unsubstituted C1 through C10 alkyl group, R3 is a substituted or unsubstituted C1 through C10 alkyl group or a substituted or unsubstituted C1 through C10 alkoxy group, and R4 is a substituted or unsubstituted C1 through C10 alkyl group, and
• in General Formula 2, R5 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, and R6 is a substituted or unsubstituted C1 through C10 alkyl group.

A method of preparing a nanocomposite comprising:

• imidizing at least a portion of amino groups included in a silane coupling agent, represented by General Formula 1, or a phosphate ester compound, represented by General Formula 2, to obtain a silane coupling agent or a phosphate ester compound having an imide backbone;
• binding the silane coupling agent or the phosphate ester compound having an imide backbone to a surface of an inorganic oxide nanoparticle to obtain an inorganic oxide nanoparticle having a surface modified with a first functional group having an imide backbone;
• modifying the surface of the inorganic oxide nanoparticle with a second functional group having an epoxy group to obtain a surface-modified inorganic oxide nanoparticle comprising the inorganic oxide nanoparticle and a first functional group and a second functional group modifying the surface of the inorganic oxide nanoparticle;
• and
• mixing the surface-modified inorganic oxide nanoparticle with a diamine and an acid dianhydride and reacting the diamine and the acid dianhydride to produce a mixture of the surface-modified inorganic oxide nanoparticle and a polyamic acid, and treating with heat the resulting mixture
• wherein
• in General Formula 1, R1 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, R2 is a hydrogen atom or a substituted or unsubstituted C1 through C10 alkyl group, R3 is a substituted or unsubstituted C1 through C10 alkyl group or a substituted or unsubstituted C1 through C10 alkoxy group, and R4 is a substituted or unsubstituted C1 through C10 alkyl group, and
• in General Formula 2, R5 is a substituted or unsubstituted C1 through C10 alkylene group, a substituted or unsubstituted C6 through C20 arylene group, or a substituted or unsubstituted C4 through C20 heteroarylene group, and R6 is a substituted or unsubstituted C1 through C10 alkyl group.