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Flexible conductive fiber based on silver nanowires and preparation method of flexible conductive fiber

A flexible conductive fiber, silver nanowire technology, used in fiber processing, fiber types, textiles and papermaking, etc., can solve problems such as poor conductivity and poor stability, and achieve low equipment requirements, excellent conductivity, and increased conductivity. The effect of durability

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

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a flexible conductive fiber based on silver nanowires, which solves the problems of poor conductivity and poor stability of conventional conductive fibers

Method used

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  • Flexible conductive fiber based on silver nanowires and preparation method of flexible conductive fiber

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preparation example Construction

[0035] The preparation method of the flexible conductive fiber based on silver nanowires provided by the present invention, the specific operation steps are as follows:

[0036] Step 1. Use deionized water and acetone in sequence to clean the inner wall of the capillary glass tube for 3 to 5 times under the action of ultrasonic vibration, and dry it for later use;

[0037] The diameter of the inner wall of the capillary glass tube is 0.1-1mm, the drying temperature of the capillary glass tube is 40-90°C, and the drying time is 1-5h;

[0038] Step 2, using a vortex mixer to disperse the silver nanowire suspension evenly;

[0039] Wherein the diameter of the silver nanowire is 10-200nm, the length is 10-45um, the concentration of the silver nanowire suspension is 1-10mg / ml, and the solvent is isopropanol, ethanol or deionized water;

[0040] When the vortex mixer disperses the silver nanowire suspension, the rotation speed is 1000-3000rpm, and the duration is 10-60min;

[0041...

Embodiment 1

[0048] Step 1. Take a capillary glass tube with an inner wall diameter of 0.1 mm and a length of 10 cm. Under the action of ultrasonic vibration, first use deionized water to clean it for 10 minutes, and then use acetone to clean it for 10 minutes. Repeat the above cleaning steps 3 times. The capillary glass tube was dried in a constant temperature oven at 40°C for 5 hours to completely dry the inner wall;

[0049] Step 2. Use the capillary glass tube in step 1 to absorb the liquid polyurethane prepolymer. When the capillary glass tube is full of polyurethane prepolymer, use blue butadiene glue to seal the capillary glass tube at the suction end to prevent the liquid polyurethane prepolymer from coming out of the tube. Outflow from the medium, the sealed end of the capillary glass tube is used as the bottom, it is placed vertically in the container, and cured at room temperature for 24 hours;

[0050] Step 3. Remove the blue butadiene at the bottom of the capillary glass tube ...

Embodiment 2

[0053] Step 1. Take a capillary glass tube with an inner wall diameter of 0.5 mm and a length of 10 cm. Under the action of ultrasonic vibration, first use deionized water to clean it for 10 minutes, and then use acetone to wash it for 10 minutes. The capillary glass tube was dried in a constant temperature oven at 60°C for 3 hours to completely dry the inner wall;

[0054] Step 2, get the solvent to be isopropanol, the concentration is the silver nanowire suspension of 1mg / ml, disperse 10min with the rotating speed of 3000rpm on the vortex mixer; The average diameter of the silver nanowire used in this embodiment is 25nm, and the average length is 20um;

[0055] Step 3, take the capillary glass tube cleaned and completely dried in step 1, immerse one end in the silver nanowire suspension, under capillary action, the silver nanowire suspension will automatically suck into the capillary glass tube, when the silver nanowire After the suspension is filled with the capillary glas...

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Abstract

The invention discloses a flexible conductive fiber based on silver nanowires. The conductive fiber is characterized in that the surface of a polyurethane fiber is wrapped with a plurality of layers of silver nanowires. The invention further discloses a preparation method of the conductive fiber. The preparation method comprises the steps of transferring a silver nanowire conductive network absorbed on an inner wall of a capillary glass tube to the surface of polyurethane, and then dissolving the capillary glass tube through hydrofluoric acid to form the conductive fiber. The conductive fiberuses the silver nanowires as a material of a conductive functional layer and transparent polyurethane as a fiber matrix material; the prepared conductive fiber has excellent conductivity and good acid-base corrosion resistance; the material of conductive layer is only retained on the surface of a fiber matrix; the fiber matrix is not damaged; and compared with a conductive fiber prepared by a mixed conductive filling method, the prepared conductive fiber has better flexibility and elasticity and can be bent, wound, stretched and cut. The conductive fiber meets miniaturization, flexibility andwearability development requirements of electronic equipment in the future.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of conductive fibers, specifically relates to a flexible conductive fiber based on silver nanowires, and also relates to a preparation method of the conductive fiber. Background technique [0002] Conductive fibers, especially flexible and stretchable conductive fibers, have been widely concerned by researchers for their multi-functional applications such as conductive electrodes, sensors, electromagnetic shielding, and electric heating. Conductive fibers exist in medical health monitoring, intelligent robots, military aerospace and other fields. Huge application value; at the same time, flexible conductive fibers with high elasticity and high conductivity can better meet the development trend of miniaturization, flexibility and wearability of modern electronic equipment. [0003] When using the mixing method to mix the conductive material and the fiber matrix material together to prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06M101/38
CPCD06M11/83D06M2101/38
Inventor 任鹏刚朱冠军郭晗
Owner XIAN UNIV OF TECH
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