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Preparation method for nano-copper with oxidation resistance and dispersibility

A technology of anti-oxidation and dispersibility, applied in the field of nanomaterials, to achieve the effect of good monodispersity, uniform particle size, easy transportation and storage

Active Publication Date: 2013-01-30
GUANGDONG TONESET SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Is there a way to protect at a lower temperature without using organic solvents? This is the current direction of development

Method used

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  • Preparation method for nano-copper with oxidation resistance and dispersibility
  • Preparation method for nano-copper with oxidation resistance and dispersibility
  • Preparation method for nano-copper with oxidation resistance and dispersibility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Disperse 3.70 g of copper glycinate and 0.02 g of dispersant sodium dodecylbenzenesulfonate in 300 mL of distilled water, and obtain a mixed solution by magnetic stirring and ultrasonic dispersion;

[0025] (2) Heat the above mixed solution to 25°C in a water bath under the action of magnetic stirring;

[0026] (3) Disperse 3.31 g of reducing agent sodium borohydride and 0.021 g of dispersant sodium dodecylbenzenesulfonate in 50 mL of distilled water, and stir to disperse;

[0027] (4) Add the mixture in step (3) dropwise to the mixture in step (2) for 30 seconds, then continue to react at 25°C for 3 hours;

[0028] (5) The resulting suspension was centrifuged (10,000 rpm), washed twice with absolute ethanol and distilled water, and the resulting solid product was dispersed in 50 g of n-butanol and left to stand for 1 hour. XRD such as figure 1 As shown: the crystal phase of simple copper appears, no other copper oxides appear, and the surface has good oxidation r...

Embodiment 2

[0031] (1) Disperse 2.50 g of anhydrous cuprous acetate and 0.01 g of dispersant sodium dodecylbenzenesulfonate in 500 mL of distilled water, and obtain a mixed solution by magnetic stirring and ultrasonic dispersion;

[0032] (2) Heat the above mixed solution to 50°C in a water bath under the action of magnetic stirring;

[0033] (3) Disperse 1.56 g of sodium borohydride and 0.015 g of dispersant sodium dodecylbenzenesulfonate in 200 mL of distilled water, stir to disperse, and obtain a mixed solution;

[0034] (4) Add the mixture in step (3) dropwise to the mixture in step (2) for 90 seconds, then continue to react at 50°C for 3 hours;

[0035] (5) The resulting suspension was centrifuged (10,000 rpm), washed twice with absolute ethanol and distilled water, and the resulting solid product was dispersed in 20 g of tributyl phosphate and left to stand for 1 hour.

[0036] SEM detects the morphology and structure of copper nanoparticles, such as Figure 2A shown. The obtaine...

Embodiment 3

[0039] (1) Disperse 3.40 g of copper tartrate trihydrate and 0.10 g of dispersant sodium polyacrylate (molecular weight 3000) in 300 mL of distilled water, and obtain a mixed liquid by magnetic stirring and ultrasonic dispersion;

[0040] (2) Heat the above mixed solution to 75°C in a water bath under the action of magnetic stirring;

[0041] (3) Disperse 1.50 g of hydrazine hydrate and 0.24 g of dispersant sodium polyacrylate (molecular weight 3000) in 100 mL of distilled water, and stir to disperse;

[0042] (4) Add the mixture in step (3) dropwise to the mixture in step (2) for 50 seconds, then continue to react at 75°C for 3 hours;

[0043] (5) The resulting suspension was centrifuged (rotating at 10,000 rpm), washed twice with absolute ethanol and distilled water, and the resulting solid product was dispersed in 50 g of oleic acid and left to stand for 1 hour. SEM detects the morphological structure of the obtained nano-copper particles, such as Figure 2B shown. The o...

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Abstract

The invention relates to a preparation method for nano-copper with oxidation resistance and dispersibility. The nano-copper is a key material for conductive nano-metal ink. The preparation method comprises the steps of: dissolving or dispersing copper salt or oxide of copper into distilled water, and ultrasonically dispersing and preprocessing, so as to obtain the nano-copper under hydrosolvent; and carrying out the surface treatment on the nano-copper through a passivator, so that the nano-copper is excellent in oxidation resistance. According to the preparation method, the nano-copper is prepared at lower temperature ranged from 25 to 90 DEG C; the prepared nano-copper has the particle size of 20 to 100nm; a nano-copper particle prepared by using the preparation method is excellent in oxidization resistance and monodispersity, and is easily dispersed into an organic solvent; the nano-copper is expected to be applied to the fields such as the RFID (Radio Frequency Identification Devices) field, the printing electronic circuit filed, and the electromagnetic wave shielding field; by virtue of the preparation method, the shortcomings of the conventional manufacture method that a plurality of processes are carried out and the efficiency is low can be avoided, no waste liquid is generated, and the environment is less affected; and the preparation method for the nano-copper is very important for the reformation of the production of an electronic circuit.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and specifically relates to a method for preparing nano-copper, in particular to a method for preparing nano-copper with small particle size, good oxidation resistance and dispersibility, which can be widely used in the full-printed electronics industry , is the key material of conductive nano metal ink. Background technique [0002] As a key electronic material used in printed electronics technology, conductive nano-metal ink is increasingly used in electronic industries such as membrane switches, flexible printed circuits, electromagnetic shielding, potentiometers, and radio frequency identification systems (RFID). Advantages have attracted widespread attention, because of its considerable market prospects, it has attracted investment from large companies in many countries. In foreign countries, Flint Ink, the world's largest private ink manufacturer, invested millions of dollars in rese...

Claims

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Application Information

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IPC IPC(8): B22F9/20C09D11/02C09D11/52
Inventor 张念椿刘彬云王植材肖定军
Owner GUANGDONG TONESET SCI & TECH
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