Method for preparing super-hydrophobic conductive cellulose fabrics by CNT (carbon nano tube) finishing technology

Abstract

The invention provides a method for preparing super-hydrophobic conductive cellulose fabrics by the CNT (carbon nano tube) finishing technology, which is characterized in that the method comprises the following steps: 1, preparing CNT dispersion liquid; 2, performing dipping-rolling treatment on cellulose fabrics; 3, putting treated samples in an oven for drying; and 4, repeating the step 2 and the step 3 until the cellulose fabrics attain prospective water repellency and electrical conductivity. The method provided by the invention uses a one-step method to realize the finishing of the cellulose fabrics on super water-repelling property and electric conduction, and has the following advantages: 1, simplicity and convenience in operation, and operating-environment friendliness; 2, no need for expensive equipment; and 3, the capacity of realizing industrialized production on the existing dyeing and finishing production line and the sizing production line.

Description

technical field

[0001] The invention relates to carbon nanotube finishing of cellulose textiles, which realizes water-repellent and conductive finishing of fabrics by conventional dyeing and finishing technology, has the functions of electromagnetic shielding, antistatic, stealth, waterproof and dustproof, and is suitable for military industry, Aerospace, medical and health, electronics, sensors, clothing and other fields. Background technique

[0002] The super water-repellent surface refers to the static contact angle between the solid surface and water greater than 150°, and the solid surface free energy and surface roughness are two key factors for super water-repellent finishing. Carbon nanotubes have a high aspect ratio and a micron-scale length, with super strong mechanical properties and excellent electrical properties. In recent years, the research on the application of carbon nanotubes has been increasing year by year, but the application in fabric water-repellent...

Examples

Embodiment 1

[0022] Step 1. Mix 400 mg of multi-walled carbon nanotubes, 50 ml of 5% perfluorosulfonic acid solution by mass percent, 80 ml of water, and 70 ml of absolute ethanol, and use ultrasonic treatment for 2 hours to obtain a carbon nanotube dispersion.

[0023] Step 2. Soak the plain cotton woven fabric in the above-mentioned carbon nanotube dispersion for 5 minutes, and then dry the fabric (with a scraping rate of about 75%) to obtain a treated sample.

[0024] Step 3. Put the treated sample in an oven, and bake at 60° for 5 minutes, and then at 80° for 15 minutes.

[0025] Step 4. When repeating Step 2 and Step 3 three times:

[0026] The surface electron microscope photos of the finished cotton fabrics are as follows: figure 1 As shown, the measured contact angle of the cotton fabric after finishing is 152°,

[0027] Such as figure 2 As shown, the surface resistance is 600Ω-1000Ω / Square.

[0028] When repeating step 2 and step 3 6 times:

[0029] The surface electron micr...

Embodiment 2

[0032] Step 1. Mix 400mg of multi-walled carbon nanotubes, 50ml of perfluorosulfonic acid solution with a concentration of 5% by mass, 120ml of water, and 40ml of absolute ethanol, and use ultrasonic treatment for 2 hours to obtain a carbon nanotube dispersion.

[0033] Step 2. Immerse the plain cotton woven fabric in the carbon nanotube dispersion solution for 5 minutes, and then dry the fabric (with a margin of about 75%) to obtain a treated sample.

[0034] Step 3. Put the treated sample in an oven, and bake at 60° for 5 minutes, and then at 80° for 15 minutes.

[0035] Step 4. When repeating Step 2 and Step 3 three times:

[0036] The measured contact angle of the cotton fabric after finishing is 151°, as Figure 5 As shown, the surface resistance is 600Ω-1000Ω / Square.

[0037] When repeating step 2 and step 3 6 times:

[0038] The measured contact angle of the cotton fabric after finishing is 154°, as Figure 6 As shown, the surface resistance is 200-400Ω / square.

[...

technical field

[0001] The invention relates to carbon nanotube finishing of cellulose textiles, which realizes water-repellent and conductive finishing of fabrics by conventional dyeing and finishing technology, has the functions of electromagnetic shielding, antistatic, stealth, waterproof and dustproof, and is suitable for military industry, Aerospace, medical and health, electronics, sensors, clothing and other fields. Background technique

[0002] The super water-repellent surface refers to the static contact angle between the solid surface and water greater than 150°, and the solid surface free energy and surface roughness are two key factors for super water-repellent finishing. Carbon nanotubes have a high aspect ratio and a micron-scale length, with super strong mechanical properties and excellent electrical properties. In recent years, the research on the application of carbon nanotubes has been increasing year by year, but the application in fabric water-repellent...

Examples

Embodiment 1

[0022] Step 1. Mix 400 mg of multi-walled carbon nanotubes, 50 ml of 5% perfluorosulfonic acid solution by mass percent, 80 ml of water, and 70 ml of absolute ethanol, and use ultrasonic treatment for 2 hours to obtain a carbon nanotube dispersion.

[0023] Step 2. Soak the plain cotton woven fabric in the above-mentioned carbon nanotube dispersion for 5 minutes, and then dry the fabric (with a scraping rate of about 75%) to obtain a treated sample.

[0024] Step 3. Put the treated sample in an oven, and bake at 60° for 5 minutes, and then at 80° for 15 minutes.

[0025] Step 4. When repeating Step 2 and Step 3 three times:

[0026] The surface electron microscope photos of the finished cotton fabrics are as follows: figure 1 As shown, the measured contact angle of the cotton fabric after finishing is 152°,

[0027] Such as figure 2 As shown, the surface resistance is 600Ω-1000Ω / Square.

[0028] When repeating step 2 and step 3 6 times:

[0029] The surface electron micr...

Embodiment 2

[0032] Step 1. Mix 400mg of multi-walled carbon nanotubes, 50ml of perfluorosulfonic acid solution with a concentration of 5% by mass, 120ml of water, and 40ml of absolute ethanol, and use ultrasonic treatment for 2 hours to obtain a carbon nanotube dispersion.

[0033] Step 2. Immerse the plain cotton woven fabric in the carbon nanotube dispersion solution for 5 minutes, and then dry the fabric (with a margin of about 75%) to obtain a treated sample.

[0034] Step 3. Put the treated sample in an oven, and bake at 60° for 5 minutes, and then at 80° for 15 minutes.

[0035] Step 4. When repeating Step 2 and Step 3 three times:

[0036] The measured contact angle of the cotton fabric after finishing is 151°, as Figure 5 As shown, the surface resistance is 600Ω-1000Ω / Square.

[0037] When repeating step 2 and step 3 6 times:

[0038] The measured contact angle of the cotton fabric after finishing is 154°, as Figure 6 As shown, the surface resistance is 200-400Ω / square.

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