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Process for producing metal nanoparticle composite

A technology of metal particles and manufacturing methods, applied in the direction of coating, etc., to achieve the effect of simplifying the production process

Inactive Publication Date: 2015-06-17
NIPPON STEEL CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the particle size of the metal particles obtained by photoreduction reaches the maximum on the ultraviolet irradiation surface, that is, the surface layer of the matrix, but the maximum is only about tens of nanometers, and it is difficult to make metal particles with a particle size equal to or greater than this particle size Particles disperse deep

Method used

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  • Process for producing metal nanoparticle composite
  • Process for producing metal nanoparticle composite

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no. 1 Embodiment approach

[0042] The method for producing a metal microparticle composite according to the first embodiment of the present invention is a method for producing a metal microparticle composite in which metal microparticles having an average particle diameter in the range of 3 nm to 25 nm do not contact each other. It is independently (preferably completely independently) dispersed in the polyimide resin with the interval above the particle diameter of the larger metal particle in the adjacent metal particles, and the volume fraction of the metal particles is relative to The metal microparticle composite is in the range of 0.05% or more and 1% or less, and the above-mentioned method includes the following steps a and b. Here, the polyimide resin is mainly a polyimide resin obtained by imidizing a polyimide precursor resin by heating, dehydrating, and cyclization reaction. Polyimide resins are preferably used because they are superior in heat resistance and dimensional stability compared to...

no. 2 Embodiment approach

[0098] Next, a second embodiment of the present invention will be described in detail. In addition, the following description focuses on differences from the first embodiment. The method for producing a metal microparticle composite according to the second embodiment of the present invention is a method for producing a metal microparticle composite in which metal microparticles having an average particle diameter in the range of 3 nm to 30 nm do not contact each other. It is independently (preferably completely independently) dispersed in the polyimide resin with the interval above the particle diameter of the larger metal particle in the adjacent metal particles, and the volume fraction of the metal particles is relative to The metal microparticle composite is in the range of 0.2% to 5% inclusive. The method for producing the metal microparticle composite includes the following steps a and b. The polyimide resin and polyimide precursor resin in the method for producing the m...

no. 3 Embodiment approach

[0119] Next, embodiments of the present invention will be described in detail. In addition, the following description focuses on differences from the first embodiment. The method for producing a metal microparticle composite according to the third embodiment of the present invention is a method for producing a metal microparticle composite in which metal microparticles having an average particle diameter in the range of 3 nm to 30 nm do not contact each other. It is independently (preferably completely independently) dispersed in the polyimide resin with the interval above the particle diameter of the larger metal particle in the adjacent metal particles, and the volume fraction of the metal particles is relative to The metal microparticle composite is in the range of 0.5% to 5% inclusive. The method for producing the metal microparticle composite includes the following steps a and b. The polyimide resin and polyimide precursor resin in the method for producing the metal micr...

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Abstract

A process for producing a metal nanoparticle composite wherein metal nanoparticles having a mean particle diameter of 3nm or more are each independently dispersed in a polyimide resin in such a manner that the metal nanoparticles are not in contact with each other and that adjacent nanoparticles are present with a space therebetween, said space being equal to or larger than the larger of the particle diameters of the adjacent metal nanoparticles. The process includes: (a) a step of applying a coating fluid which comprises both a polyimide precursor resin and a metal compound to a substrate so as to give a metal content of 50µg / cm2 or less, and drying the resulting coating to form a coating film which has a dry film thickness of 1.7µm or less; and (b) a step of heat-treating the coating film at a temperature of 160 to 450°C not only to reduce the metal ions (or metal salt) contained in the coating film and make the resulting particulate metal (which acts as the metal nanoparticles) deposited and dispersed in the coating film but also to convert the polyimide precursor resin into a polyimide resin and thus form a polyimide resin layer which has a thickness of 1µm or less and an elastic modulus of 10GPa or less.

Description

technical field [0001] The present invention relates to a method for producing a metal microparticle composite in which metal microparticles are dispersed in a matrix made of polyimide resin. Background technique [0002] Local Surface Plasmon Resonance (LSPR) is a phenomenon in which electrons in metal particles or metal microstructures with a size of several nm to 100 nm interact with light of a specific wavelength to resonate. Localized surface plasmon resonance has long been used in colored glass that exhibits vivid colors by mixing metal particles inside the glass. In recent years, research has been conducted on applications such as development of high-output light-emitting lasers utilizing the effect of enhancing light intensity, biosensors utilizing the property of changing resonance states upon molecular bonding, and the like. [0003] In order to apply such localized surface plasmon resonance of metal fine particles to sensors and the like, it is necessary to stabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C41/46C08K3/08C08L79/08
CPCC08K3/08C09D179/08C08L79/08B22F9/20B29C41/46
Inventor 新田龙三松村康史
Owner NIPPON STEEL CHEMICAL CO LTD
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