Nanoparticles, dispersion of nanoparticles, and production method of nanoparticles
AssigneeTokyo Ohka Kogyo Co., Ltd.
InventorYuehChun Liao
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Abstract
Nanoparticles including inorganic oxide particles and having good dispersibility, a dispersion of nanoparticles including said nanoparticles, and a production method of said nanoparticles are provided. Surfaces of inorganic oxide particles is functionalized with a functionalizing agent including niobium compound having a specific structure and a silane compound having a specific structure. The inorganic oxide particles are preferably titanium oxide particles or zirconium oxide particles. Average primary particle size of the nanoparticles measured by X-ray diffraction method is preferably 3 nm or more and 20 nm or less.
Claims6
Nanoparticles comprising inorganic oxide particles, wherein surfaces of the inorganic oxide particles are functionalized with a functionalizing agent comprising at least one selected from a niobium compound represented by formula (1):
- (
- R
- 10
-
- O
- )
- 5
- -
- n
-
- Nb
- (
- R
- 11
- )
- n
- (
- 1
- )
- wherein, in the formula (1), n is an integer of 1 or more and 4 or less, R10 is an alkyl group, and R11 is a monovalent organic group bonding to niobium atom via Nb—C bond, and at least one selected from a silane compound represented by formula (2):
- (
- R
- 20
-
- O
- )
- 4
- -
- x
-
- Si
- (
- R
- 21
- -
- R
- 22
- )
- x
- (
- 2
- )
- wherein, in the formula (2), x is an integer of 1 or more and 3 or less, R20 is an alkyl group, R21 is a spacer group bonding to silicon atom via Si—C bond, and R22 is a hydrogen atom or a monovalent organic group.
A method for producing nanoparticles comprising inorganic oxide particles, wherein surfaces of the inorganic oxide particles are functionalized, the method comprising:
- reacting surfaces of inorganic oxide particles with a functionalizing agent comprising at least one selected from a niobium compound represented by formula (1)
- (
- R
- 10
-
- O
- )
- 5
- -
- n
-
- Nb
- (
- R
- 11
- )
- n
- (
- 1
- )
- wherein, in the formula (1), n is an integer of 1 or more and 4 or less, R10 is an alkyl group, and R11 is a monovalent organic group bonding to niobium atom via Nb—C bond, and
- at least one selected from a silane compound represented by formula (2):
- (
- R
- 20
-
- O
- )
- 4
- -
- x
-
- Si
- (
- R
- 21
- -
- R
- 22
- )
- x
- (
- 2
- )
- wherein, in the formula (2), x is an integer of 1 or more and 3 or less, R20 is an alkyl group, R21 is a spacer group bonding to a silicon atom via Si—C bond, and R22 is a hydrogen atom or a monovalent organic group.
Dependencies are inferred from the claim text.