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Nano-silver modified CNTs composite material as well as preparation method and application thereof

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 goal of improving interface wettability, excellent antibacterial and conductive properties Effect

Active Publication Date: 2019-02-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Nano-silver modified CNTs composite material as well as preparation method and application thereof
  • Nano-silver modified CNTs composite material as well as preparation method and application thereof
  • Nano-silver modified CNTs composite material as well as preparation method and application thereof

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 as well as a preparation method and application thereof. Thepreparation method comprises the following steps: sequentially carrying out photografting reaction and N-TES self-assembly reaction on a carbon nanotube by using P-TES to obtain a surface molecule grafted and modified carbon nanotube; sensitizing the surface molecule grafted and modified carbon nanotube, then adding sensitized nanotube into a reducing agent solution, and uniformly carrying out ultrasonic mixing to obtain a mixed solution; adding the obtained mixed solution into a tollen reagent, carrying out ultrasonic mixing reaction, as well as separating, washing and drying the product toobtain the nano-silver modified CNTs composite material. According to the method disclosed by the invention, TES molecules are successfully grafted to the surface of the carbon nanotube to form stablechemical connection; the interfacial strength is far superior to the physical adsorption action; in addition, nano-silver is uniformly distributed and particles are small, so that the wettability ofthe interface can be effectively improved; the obtained composite material has excellent antibacterial and conductive properties, and can be applied to the preparation of antibacterial and conductivecoatings 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 Applications(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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