Silver nanowire anti-electromagnetic fabric and preparation method thereof

A silver nanowire, anti-electromagnetic technology, applied in plant fibers, textiles, papermaking, fiber types, etc., can solve the problems of poor process universality and uneven quality of anti-electromagnetic fabrics, and achieve performance stability and good anti-electricity performance effect

Inactive Publication Date: 2020-12-25
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of uneven quality of anti-electromagnetic fabrics and poor process universality in the prior art, a silver nanowire anti-electromagnetic fabric and its preparation method are provided

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Silver nanowire anti-electromagnetic fabric and preparation method thereof
  • Silver nanowire anti-electromagnetic fabric and preparation method thereof
  • Silver nanowire anti-electromagnetic fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Clean the discarded shells, freeze them at -30°C-40°C for 5 hours, then immerse them in water immediately, process them under 250W ultrasonic for 2 hours, and use a wet pulverizer to obtain shell slurry;

[0025] (2) Add trypsin at a weight ratio of 50:1 to discarded shells, heat to 35-37°C and stir for 20 minutes, add 75% citric acid to adjust the pH to 3-5, and stir at 60°C for 2-4 hours After that, place it in a water bath at a temperature of 100-120°C to inactivate the enzyme, centrifuge at 10,000 rpm to recover the supernatant, collect the precipitate, and use a mixed solution of ethanol and petroleum ether with a volume ratio of 2:1 to elute the precipitate multiple times. Add ethyl acetate to the eluted precipitate, place it in 250W ultrasonic wave for 30 minutes, recover ethyl acetate by rotary evaporation under reduced pressure, and obtain chitin after freeze-drying;

[0026] (3) Add chitin to a sufficient amount of sodium hydroxide solution for deacetylati...

Embodiment 2

[0030] (1) Cotton fabric pretreatment: cotton fabric is subjected to corona treatment, the voltage is 10kV, and the time is 15s;

[0031] (2) Preparation of silver nanowire solution: mix 10 g / L silver nanowire isopropanol dispersion solution with 1 g / L nitrosonium tetrafluoroborate ethanol solution at room temperature, and shake the mixture gently until the silver nanowire Precipitation, after centrifugation, redispersed in deionized water, added 100g / L aqueous solution of hydroxyl-terminated hyperbranched polymer (HPAE) at a volume ratio of 1:10, and stirred at a constant speed for 24 hours to obtain hydroxyl-terminated hyperbranched polymer-modified silver nanoparticles. Line, centrifuged, washed with deionized water and ethanol several times, dried and prepared into an aqueous solution of 100-4000mg / mL for later use;

[0032] (3) Electrostatic spraying: alternately spraying and assembling the silver nanowires modified by the hydroxyl-terminated hyperbranched polymer and the...

Embodiment 3

[0037] (1) Pretreatment of polyester fabric: Corona treatment is performed on the polyester fabric, the voltage is 8`12kV, and the time is 10-20s, see Table 1;

[0038] Table 3 Fabric pretreatment and preparation methods of silver nanowires

[0039]

[0040] (2) Preparation of silver nanowire solution: mix 10 g / L silver nanowire isopropanol dispersion solution with 1 g / L nitrosonium tetrafluoroborate ethanol solution at room temperature, and shake the mixture gently until the silver nanowire Precipitate, after centrifugation, redisperse in deionized water, add 100g / L aqueous solution of hydroxyl-terminated hyperbranched polymer at a volume ratio of 1:10, stir at a constant speed for 24 hours, obtain hydroxyl-terminated hyperbranched polymer-modified silver nanowires, centrifuge Separate, wash with deionized water and ethanol several times, dry and prepare an aqueous solution of 100-4000 mg / mL for later use;

[0041] (3) The electrostatic spraying and finishing process is c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention provides a silver nanowire anti-electromagnetic fabric and a preparation method thereof. The preparation method comprises the steps that chitosan and hydroxyl-terminated hyperbranched polymer modified silver nanowires are prepared, the fabric is coated with the chitosan and hydroxyl-terminated hyperbranched polymer modified silver nanowires through an electrostatic spraying process,and the silver nanowire anti-electromagnetic fabric is obtained after finishing. The fabric has excellent anti-electromagnetic performance, the computer shielding test is less than 10 uW/cm<2>, and the computer shielding test after 20 times of washing is less than 50 uW/cm<2>. According to the method, waste shells are used as one of raw materials, environmental friendliness is high, the process universality is good, and good popularization value is achieved.

Description

technical field [0001] The invention belongs to the technical field of textiles, and in particular relates to a silver nanowire anti-electromagnetic fabric and a preparation method thereof. Background technique [0002] With the development of information technology, the use of electronic and electrical products is becoming more and more extensive. While these products bring convenience to people, they also bring electromagnetic pollution. When electromagnetic wave radiation reaches a certain level, it will cause certain harm to human health. Electromagnetic wave pollution has become the fourth largest pollution source after air pollution, water pollution and noise pollution. In addition, the static electricity generated in daily life may be harmful to production: life, especially the use of synthetic fibers is quite common, and synthetic fibers are prone to static electricity, petroleum, chemical, textile, rubber, printing, electronics, pharmaceuticals, and powder process...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/03D06M11/83D06M101/32D06M101/06
CPCD06M15/03D06M11/83D06M2101/32D06M2101/06
Inventor 高大伟王丽丽王春霞俞俭祁珍明崔红章学如
Owner YANCHENG INST OF TECH
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