Surface treatment method for surface silver-plated core-shell composite particles and application thereof in preparation of conductive and electromagnetic shielding composite materials

Abstract

The invention discloses a surface treatment method for surface silver-plated core-shell composite particles. The surface treatment method comprises the following steps: 1, arranging surface silver-plated core-shell composite particles prepared through a silver liquid-phase chemical reduction technology in a container, and adding deionized water to prepare a mixture; 2, performing ultrasonic treatment on the mixture, and continuously stirring the mixture in the treatment process; and 3, washing, performing suction filtration and drying to obtain the treated surface silver-plated core-shell composite particles. The invention also provides application of the surface silver-plated core-shell composite particles obtained by the method in preparation of conductive and electromagnetic shielding composite materials. The treated surface silver-plated core-shell composite particles can serve as conductive filler, and a conductive adhesive made of the particles has high electrical property and excellent mechanical property and has a good application prospect in electromagnetic compatibility engineering application.

Description

technical field

[0001] The invention relates to a surface treatment method of silver-coated core-shell composite particles and its application in the preparation of conductive and electromagnetic shielding composite materials, belonging to the field of composite materials. Background technique

[0002] Different from the structure of metal-based conductive materials, polymer-based conductive composite materials not only have excellent electrical conductivity, can effectively suppress electromagnetic interference, information leakage and electromagnetic pollution generated by electronic and electrical equipment, but also have excellent environmental adaptability , light weight, and easy processing and use, it is widely used in electronic packaging, light-emitting diodes, solar cells, sensors, radio frequency identification and electromagnetic compatibility and other fields. Polymer-based conductive composite materials are mainly composed of conductive fillers, polymer matrix ...

Examples

Embodiment Construction

[0018] The surface treatment method of a kind of surface coating silver core-shell composite particle that the present invention proposes, comprises the following steps:

[0019] Step 1. Put the surface-coated silver-coated core-shell composite particles prepared by the liquid-phase chemical silver reduction technology into a container, and add deionized water to form a mixture;

[0020] Step 2, the mixture is subjected to ultrasonic treatment, and the mixture is continuously stirred during the treatment process;

[0021] Step 3: washing, suction filtering and drying to obtain the treated silver-coated core-shell composite particles.

[0022] Wherein, the ultrasonic treatment power in step 2 is 240-600W, and the ultrasonic treatment time is 8-20min.

[0023] The present invention also provides an application of the silver-coated core-shell composite particles obtained by the above method in the preparation of conductive and electromagnetic shielding composite materials, which...

technical field

[0001] The invention relates to a surface treatment method of silver-coated core-shell composite particles and its application in the preparation of conductive and electromagnetic shielding composite materials, belonging to the field of composite materials. Background technique

[0002] Different from the structure of metal-based conductive materials, polymer-based conductive composite materials not only have excellent electrical conductivity, can effectively suppress electromagnetic interference, information leakage and electromagnetic pollution generated by electronic and electrical equipment, but also have excellent environmental adaptability , light weight, and easy processing and use, it is widely used in electronic packaging, light-emitting diodes, solar cells, sensors, radio frequency identification and electromagnetic compatibility and other fields. Polymer-based conductive composite materials are mainly composed of conductive fillers, polymer matrix ...

Examples

Embodiment Construction

[0018] The surface treatment method of a kind of surface coating silver core-shell composite particle that the present invention proposes, comprises the following steps:

[0019] Step 1. Put the surface-coated silver-coated core-shell composite particles prepared by the liquid-phase chemical silver reduction technology into a container, and add deionized water to form a mixture;

[0020] Step 2, the mixture is subjected to ultrasonic treatment, and the mixture is continuously stirred during the treatment process;

[0021] Step 3: washing, suction filtering and drying to obtain the treated silver-coated core-shell composite particles.

[0022] Wherein, the ultrasonic treatment power in step 2 is 240-600W, and the ultrasonic treatment time is 8-20min.

[0023] The present invention also provides an application of the silver-coated core-shell composite particles obtained by the above method in the preparation of conductive and electromagnetic shielding composite materials, which...

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