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Preparation method of super-hydrophobic electromagnetic shielding fabric

An electromagnetic shielding, super-hydrophobic technology, applied in the direction of plant fibers, textiles and papermaking, liquid-repellent fibers, etc., can solve the problems of reducing the air permeability of fabrics, cumbersome and complicated preparation processes, and polyaniline refractory and insoluble. The production process is simple and easy to operate, the experimental conditions are not demanding, and the method is simple and easy to implement

Inactive Publication Date: 2019-10-18
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Polyaniline has good electrical conductivity and environmental stability, but it is difficult to melt and dissolve, which limits its wide application to a certain extent
[0005] Chinese patent CN 104846620 first uses low-temperature plasma to introduce amino groups on the surface of textiles, then uses crosslinking resin as a crosslinking agent to graft aniline monomers onto the surface of textiles, and then uses liquid phase in-situ polymerization to generate polyaniline on the surface of textiles layer, the resulting electromagnetic shielding fabric has a shielding effectiveness of more than 18dB for low-frequency electromagnetic waves below 10MHz, but the preparation process is too cumbersome and complicated, and the requirements for experimental equipment are relatively high, and there is no mention of the effect of electromagnetic shielding at high frequencies
However, this method does not involve how to effectively improve the stability of the electromagnetic shielding performance of the film material on the substrate
[0006] Chinese patent CN108625160A uses capillary effect non-covalent assembly to prepare functional coating film. This preparation method needs to be treated with a constant temperature shaking table environment and a large number of assembly layers to achieve the purpose of high load. The production efficiency of this process is low; in addition The flexible polymer solution described by the applicant does not indicate how to prepare the solution of polyaniline, and generally polyaniline is infusible and insoluble, and cannot be easily obtained
However, this method requires the use of a large amount of adhesive to enhance the bonding performance between the functional film and the fabric, so that the air permeability and flexibility of the fabric are reduced.
Chinese patent At present, there is no patent pointing out how to improve the durability of the fabric's electromagnetic shielding performance while ensuring the fabric's excellent wearing performance and electromagnetic shielding performance
However, such substances contain high toxicity, which affects health, and the preparation process is relatively cumbersome, and will greatly reduce the air permeability of the fabric

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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  • Preparation method of super-hydrophobic electromagnetic shielding fabric
  • Preparation method of super-hydrophobic electromagnetic shielding fabric
  • Preparation method of super-hydrophobic electromagnetic shielding fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Choose ordinary cotton fabric, cut the fabric with a size of 6cmx6cm, the thickness is about 0.415mm, the warp and weft density are 130 threads / 10cm and 100 threads / 10cm respectively, and the mass per unit area is 133g / ㎡. Follow the steps below to prepare superhydrophobic GO / PANI Coated cotton fabric.

[0038]Step 1. Wash the cotton fabric once with acetone, absolute ethanol and NaOH solution with a mass concentration of 15 g / L, and then wash it with deionized water to clean the fabric.

[0039] Step 2, immerse the cotton fabric in the reaction of 50g / L (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride solution and 18g / L sodium hydroxide solution to make cationization reagent solution for 15min, Take it out and keep 100% surplus rate. Leave the fabric at room temperature for 24 hours, then take it out, wash it with deionized water several times, and dry it for later use.

[0040] Step 3. Prepare a graphene oxide solution with a mass concentration of 0.4 g / L; put ...

Embodiment 2

[0049] The cotton fabric sample that present embodiment is selected with embodiment 1 is identical, and difference is that graphene oxide solution concentration parameter is different, and the concrete method of this embodiment is as follows:

[0050] Step 1. Wash the cotton fabric once with acetone, absolute ethanol and NaOH solution with a mass concentration of 15 g / L, and then wash it with deionized water to clean the fabric.

[0051] Step 2, immerse the cotton fabric in the reaction of 50g / L (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride solution and 18g / L sodium hydroxide solution to make cationization reagent solution for 15min, Take it out and keep 100% surplus rate. Leave the fabric at room temperature for 24 hours, then take it out, wash it with deionized water several times, and dry it for later use.

[0052] Step 3. Prepare a graphene oxide solution with a mass concentration of 0.6 g / L; put the solution into an ultrasonic cleaner to vibrate for 1 hour, then...

Embodiment 3

[0061] The cotton fabric sample selected in the present embodiment and embodiment 2 is identical, and difference is that the aniline solution concentration parameter is different, and the concrete implementation method of this embodiment is as follows:

[0062] Step 1. Wash the cotton fabric once with acetone, absolute ethanol and NaOH solution with a mass concentration of 15 g / L, and then wash it with deionized water to clean the fabric.

[0063] Step 2, immerse the cotton fabric in the reaction of 50g / L (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride solution and 18g / L sodium hydroxide solution to make cationization reagent solution for 15min, Take it out and maintain a 100% residual rate; take it out after standing at room temperature for 24 hours, wash it with deionized water for several times, and dry it for later use.

[0064] Step 3. Prepare a graphene oxide solution with a mass concentration of 0.6 g / L; put the solution into an ultrasonic cleaner to vibrate for ...

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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Abstract

The invention discloses a preparation method of a super-hydrophobic electromagnetic shielding fabric. The preparation method comprises the steps of firstly constructing graphene oxide on the surface of a cationized fabric, then adsorbing aniline monomer molecules on the surface of the fabric, then polymerizing the aniline monomer into polyaniline through an oxidant to form a fabric constructed bygraphene / polyaniline, and finally finishing emulsified carnauba wax on the fabric through an impregnation method. Compared with the prior art, the preparation method of the super-hydrophobic electromagnetic shielding fabric has the advantages that super-hydrophobization finishing is carried out on a coated fabric, so that the durability of the shielding performance of the fabric is improved. Special equipment is not needed in the whole assembly process, the requirement on experimental conditions is not high, and the production process is simple and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of preparing electromagnetic shielding fabrics, and in particular relates to a preparation method of superhydrophobic electromagnetic shielding fabrics. Background technique [0002] Nowadays, with the rapid development of science and technology, all kinds of electronic products are flooding our living environment, and the problem of electromagnetic radiation has gradually attracted attention. Long-term and excessive electromagnetic radiation will cause serious damage to people's reproductive, nervous and immune systems, and is a major cause of leukemia, cancer, cardiovascular and other diseases. In order to protect human health, the research and development of electromagnetic shielding materials has become a key content in the field of scientific research and material engineering. In the military, electromagnetic shields are often used to prevent information leakage and external interference. Electromagne...

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): D06M11/74D06M15/61D06M15/01D06M13/46D06M101/06
CPCD06M11/74D06M15/61D06M15/01D06M13/46D06M2101/06D06M2200/12D06M2200/25
Inventor 邹梨花汤勋蒙张波杨莉徐珍珍孙妍妍
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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