Structural body, structural body manufacturing method, and precursor composition

Patent metadata

Field	Value
Publication number	US-2024336517-A1
Application number	US-202218700017-A
Country	US
Kind code	A1
Filing date	Oct 12, 2022
Priority date	Nov 19, 2021
Publication date	Oct 10, 2024
Grant date	—

Abstract

An object is to provide a structural body having high light transmissivity and a high degree of freedom in shape, a manufacturing method for the structural body, and a precursor composition used in the manufacturing method.
A structural body according to an embodiment of the present disclosure includes a plurality of nanoparticles, the plurality of nanoparticles being directly covalent-bonded to each other without interposing an additive component other than the plurality of nanoparticles.

First claim

1 . A structural body comprising a plurality of nanoparticles, the plurality of nanoparticles being directly covalent-bonded to each other without interposing an additive component other than the plurality of nanoparticles.

2 . The structural body according to claim 1 , wherein packing density of the plurality of nanoparticles is equal to or higher than 1% by volume and equal to or lower than 74% by volume.

3 . The structural body according to claim 1 , wherein packing density of the plurality of nanoparticles is equal to or higher than 34% by volume and equal to or lower than 74% by volume.

4 . The structural body according to claim 1 , wherein a primary particle diameter of each of the plurality of nanoparticles is equal to or smaller than 11 nm.

5 . The structural body according to claim 1 , wherein a primary particle diameter of each of the plurality of nanoparticles is equal to or smaller than 7 nm.

6 . The structural body according to claim 1 , wherein a secondary particle diameter of some of the plurality of nanoparticles is equal to or smaller than 46 nm.

7 . The structural body according to claim 1 , wherein
the plurality of nanoparticles is covalent-bonded to each other to form a coupled body, the coupled body has gaps each among adjacent ones of the plurality of nanoparticles, and the gaps are packed with a thermoplastic resin.

8 . The structural body according to claim 7 , wherein a volume of the thermoplastic resin being packed is equal to or smaller than a volume of the gaps.

9 . The structural body according to claim 1 , wherein each of the plurality of nanoparticles is a metal oxide.

10 . The structural body according to claim 1 , wherein each of the plurality of nanoparticles is an oxide of zirconium, titanium, tin, silicon, aluminum, or zinc.

11 . The structural body according to claim 1 , wherein each of the plurality of nanoparticles is an oxide of silicon or aluminum.

12 . A structural body manufacturing method comprising, after a plurality of alkoxy groups or a plurality of reactive functional groups is used to modify a surface of each of a plurality of nanoparticles, allowing the plurality of alkoxy groups or the plurality of reactive functional groups that has modified the surface of each of the plurality of nanoparticles to be covalent-bonded to each other.

13 . The structural body manufacturing method according to claim 12 , further comprising, after each of the plurality of nanoparticles that has been modified by the plurality of alkoxy groups is allowed to be dispersed in a solvent, and an acid-and-base forming agent is further added, allowing the solvent to be volatilized while an external stimulus is applied in a predetermined mold or on a predetermined substrate.

14 . The structural body manufacturing method according to claim 13 , wherein light irradiation or heating is used as the external stimulus.

15 . The structural body manufacturing method according to claim 12 , further comprising, after each of the plurality of nanoparticles that has been modified by the plurality of reactive functional groups is allowed to be dispersed in a solvent, and a reaction initiating reagent is further added, allowing the solvent to be volatilized while an external stimulus is applied in a predetermined mold or on a predetermined substrate.

16 . The structural body manufacturing method according to claim 15 , wherein light irradiation or heating is used as the external stimulus.

17 . The structural body manufacturing method according to claim 12 , further comprising adding a metal alkoxide compound represented by General Formula (1) described below or a metal chloride represented by General Formula (2) described below to modify the surface of each of the plurality of nanoparticles with the plurality of alkoxy groups.
[Chemical Formula 1] R 1 x M(OR 2 ) 4-x   (1)
R 1 x MCl 4-x   (2)

(R 1 is, separately and independently, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a dodecyl group, a hexadecyl group, a vinyl group, or a phenyl group. R 2 is a methyl group, an ethyl group, a propyl group, or an isopropyl group. M is, separately and independently, silicon, aluminum, titanium, tin, or zinc. X is 0 or an integer equal to or above 1 and equal to or below 2.)

18 . The structural body manufacturing method according to claim 13 , further comprising adding an organic silane compound represented by General Formula (3) described below or General Formula (4) described below to modify the surface of each of the plurality of nanoparticles with the plurality of reactive functional groups.
[Chemical Formula 2] R 3 y Si(OR 4 ) 4-y   (3)
R 3 y SiCl 4-y   (4)

(R 3 is, separately and independently, a hydrogen atom, a vinyl group, an acryloxy group, a methacryloxy group, an aminopropyl group, a glycidoxypropyl group, or a mercaptopropyl group. R 4 is a methyl group, an ethyl group, a propyl group, or an isopropyl group. y is an integer equal to or above 1 and equal to or below 3.)

19 . The structural body manufacturing method according to claim 12 , further comprising, after the plurality of nanoparticles is allowed to be covalent-bonded to each other to form a coupled body, allowing a thermoplastic resin to be permeated into gaps each among adjacent ones of the plurality of nanoparticles.

20 . A precursor composition comprising a metal alkoxide molecule represented by General Formula (5) described below.
[Chemical Formula 3] R 5 x M(OR 6 ) 4-x   (5)

(R 5 is, separately and independently, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a dodecyl group, a hexadecyl group, a vinyl group, or a phenyl group. R 6 is a methyl group, an ethyl group, a propyl group, or an isopropyl group. M is, separately and independently, silicon, aluminum, titanium, tin, or zinc. X is 0 or an integer equal to or above 1 and equal to or below 2.)

Assignees

• Sony Group Corp

Inventors

• Sakamoto Shigeru

Classifications

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title

• C09C3/006

  Combinations of treatments provided for in groups C09C3/04 - C09C3/12 · CPC title

• C09C3/046

  Densifying, degassing, packaging · CPC title

• C09C1/407

  Aluminium oxides or hydroxides · CPC title

• C09C1/3692

  Combinations of treatments provided for in groups C09C1/3615 - C09C1/3684 · CPC title