JP2021188087A5

JP2021188087A5 -

Info

Publication number: JP2021188087A5
Application number: JP2020093890A
Authority: JP
Filing date: 2020-05-29
Publication date: 2023-05-30

Claims

A nickel nanoparticle aggregate having a coating on the surface of nickel nanoparticles having an average particle diameter of 5 to 100 nm, wherein the nickel nanoparticles aggregate directly or via the coating.

2. The nickel nanoparticle aggregate according to claim 1, wherein the coating is a coating of nickel hydroxide and/or nickel oxide.

Nickel nanoparticles having an average particle size of 5 to 100 nm and a binder resin are dispersed in a non-polar solvent, and a nickel nanoparticle paste is brought into contact with water or hydrogen peroxide solution to form a film on the surface of the nickel nanoparticles. A nickel nanoparticle aggregate obtained by generating and aggregating nickel nanoparticles directly or via the coating.

4. The nickel nanoparticle aggregate according to claim 3 , wherein the nickel nanoparticle paste is dried and then brought into contact with water or 1 wt % or more hydrogen peroxide solution.

The nickel nanoparticle aggregate according to any one of claims 1 to 4 , wherein the nickel nanoparticles are nickel nanoparticles having a calculated value V of 3 or more calculated by the following formula (1).
V=A×D ³ /S/10000000 (1)
{In the formula, A means the amount [ppm] of nickel dimethylglyoxime detected by the nickel measurement method specified in JIS K 0102 59.1, and S is the ratio of nickel particles measured by the gas adsorption method. It means the surface area [m ² /g], and D means the average particle size [nm] of the nickel particles measured with a scanning electron microscope (SEM). }

6. Any one of claims 1 to 5 , wherein the nickel nanoparticles consist of nickel alone or an alloy of nickel and one or more metals selected from lithium, copper, iron, cobalt, gold, platinum and palladium. Nickel nanoparticle aggregates according to .

The nickel nanoparticle aggregate according to any one of claims 1 to 6 , wherein 99 wt% or more of the metal component contained in the nickel nanoparticles is nickel.

a substrate;
A nickel nanoparticle composite substrate, comprising: the nickel nanoparticle aggregate according to any one of claims 1 to 7 , which is laminated on the substrate.

A step of preparing a nickel nanoparticle paste in which nickel nanoparticles having an average particle size of 5 to 100 nm and a binder resin are dispersed in a nonpolar solvent;
A step of bringing the nickel nanoparticle paste into contact with water or hydrogen peroxide solution to form a film on the surface of the nickel nanoparticles and aggregating the nickel nanoparticles directly or through the film;
A method for producing nickel nanoparticle aggregates comprising: