A kind of nano-silver modified cnts composite material and its preparation method and application

A composite material and nano-silver technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of weak bonding strength and strong chemical connection, and achieve the improvement of interface wettability, excellent antibacterial and electrical conductivity. Effect

Active Publication Date: 2021-10-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The interface wetting between CNTs and Ag matrix needs to be optimized, that is to say, the excellent performance of CNTs in the composite film can be further exerted through interface modification, but the bonding strength produced by physical adsorption between Ag and CNTs is weak. The chemical link is stronger

Method used

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  • A kind of nano-silver modified cnts composite material and its preparation method and application
  • A kind of nano-silver modified cnts composite material and its preparation method and application
  • A kind of nano-silver modified cnts composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of a nano-silver modified CNTs composite material (CNTs@AgNP) of the present embodiment, the specific steps are as follows:

[0041] (1) P-TES photografting

[0042] Weigh 0.7g of CNTs into 100ml of P-TES alcohol solution (0.8g / L) and ultrasonically disperse for 10min. Then, the CNTs were extracted with a vacuum filtration device and placed in a vacuum drying oven at 100° C. for 4 h. Then put it into a mortar and grind it into powder, spread it evenly and place it at a wavelength of 365nm and a light intensity of 0.5J / cm 2 700s under UV light irradiation. Then, use alcohol to filter and wash 8 times on a vacuum filtration device to remove excess P-TES, and obtain P-TES photografted carbon nanotubes (CNTs-PTES).

[0043] (2) N-TES self-assembly

[0044] Put the CNTs-PTES prepared in step (1) into 100ml of N-TES aqueous solution (1g / L), and stir on a magnetic stirrer at room temperature for 60min, take the mixed solution to wash, and evaporate t...

Embodiment 2

[0051] The preparation method of a nano-silver modified CNTs composite material (CNTs@AgNP) of the present embodiment, the specific steps are as follows:

[0052] (1) P-TES photografting

[0053] Weigh 0.3g of CNTs into 100ml of P-TES alcohol solution (0.5g / L) and ultrasonically disperse for 10min. Then, the CNTs were extracted with a vacuum filtration device and placed in a vacuum drying oven at 100° C. for 4 h. Then put it into a mortar and grind it into powder, spread it evenly and place it at a wavelength of 256nm and a light intensity of 0.1J / cm 2 irradiated under UV light for 300 s. Then, use alcohol to filter and wash 8 times on a vacuum filtration device to remove excess P-TES, and obtain P-TES photografted carbon nanotubes (CNTs-PTES).

[0054] (2) N-TES self-assembly

[0055] Put the CNTs-PTES prepared in step (1) into 100ml of N-TES aqueous solution (0.5g / L), and stir on a magnetic stirrer at room temperature for 40min, take the mixed solution to wash, and evapo...

Embodiment 3

[0063] The preparation method of a nano-silver modified CNTs composite material (CNTs@AgNP) of the present embodiment, the specific steps are as follows:

[0064] (1) P-TES photografting

[0065] Weigh 1g of CNTs into 100ml of P-TES alcohol solution (1g / L) and ultrasonically disperse for 10min. Then, the CNTs were extracted with a vacuum filtration device and placed in a vacuum drying oven at 100° C. for 4 h. Then put it into a mortar and grind it into powder, spread it evenly and place it under a wavelength of 300nm and a light intensity of 1J / cm 2 500s under UV light irradiation. Then, use alcohol to filter and wash 8 times on a vacuum filtration device to remove excess P-TES, and obtain P-TES photografted carbon nanotubes (CNTs-PTES).

[0066] (2) N-TES self-assembly

[0067] Put the CNTs-PTES prepared in step (1) into 100ml of N-TES aqueous solution (2g / L), and stir on a magnetic stirrer at room temperature for 60min, take the mixed solution to wash, and evaporate to d...

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Abstract

The invention belongs to the technical field of conductive composite materials, and discloses a nano-silver modified CNTs composite material, a preparation method and an application thereof. The carbon nanotubes are sequentially subjected to photografting reaction and N-TES self-assembly reaction with P-TES to obtain carbon nanotubes modified by grafting surface molecules; then they are sensitized and added to the reducing agent solution for ultrasonic mixing. The mixed solution is obtained, and then the mixed solution is added to the silver ammonia solution for ultrasonic mixing reaction, and the product is separated, washed and dried to obtain the nano-silver modified CNTs composite material. The method of the present invention successfully grafts TES molecules on the surface of carbon nanotubes to form a stable chemical connection, and the interface strength is far superior to that of physical adsorption; and the nano-silver is evenly distributed and the particles are small, which can effectively improve the wettability of the interface; The obtained composite material has excellent antibacterial and conductive properties, and can be applied to the preparation of antibacterial and conductive coatings in flexible electronic devices.

Description

technical field [0001] The invention belongs to the technical field of conductive composite materials, and in particular relates to a nano-silver modified CNTs composite material and a preparation method and application thereof. Background technique [0002] In recent years, the demand for portable smart devices has grown rapidly. Flexible and stretchable electronic devices, including electronic skins, flexible displays, wearable computer devices, flexible solar panels, etc., have come under the spotlight of the times. But until now, most research has focused on exploiting precious metals such as silver and gold. Among them, due to economic considerations, silver is more widely used, although pure silver has good ductility, electrical conductivity and thermal conductivity are also the highest among all metals. However, flexible devices must also maintain good mechanical properties under harsh conditions, such as stretching and bending. Therefore, there is an urgent need t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/168
CPCC01B32/168
Inventor 康志新张洋周明强
Owner SOUTH CHINA UNIV OF TECH
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