MXene-based conductive self-cleaning composite fabric for electromagnetic shielding and preparation method of MXene-based conductive self-cleaning composite fabric

A composite fabric, electromagnetic shielding technology, used in plant fibers, textiles and papermaking, fiber processing and other directions, can solve the problems of poor electromagnetic shielding performance, poor mechanical properties, moisture resistance, etc., to achieve good stability, excellent bonding force, easily oxidized effect

Inactive Publication Date: 2022-08-05
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the thorny problems in the prior art such as low conductivity / poor electromagnetic shielding performance, poor mechanical properties, not resistant to moisture and acid-base corrosive environments

Method used

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  • MXene-based conductive self-cleaning composite fabric for electromagnetic shielding and preparation method of MXene-based conductive self-cleaning composite fabric
  • MXene-based conductive self-cleaning composite fabric for electromagnetic shielding and preparation method of MXene-based conductive self-cleaning composite fabric
  • MXene-based conductive self-cleaning composite fabric for electromagnetic shielding and preparation method of MXene-based conductive self-cleaning composite fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Dip coating with conductive coating

[0033] a) Fabric surface pretreatment

[0034] Before dip coating, the surface pretreatment of polyester (PET) fabric was carried out by alkaline solution method. The specific steps were as follows: Immerse a certain size of PET fabric (2.5cm×2.5cm) in NaOH solution (10mg / mL) and reacted at 80°C for 2 hours, then taken out and washed with deionized water for several times until neutral, and put it into a vacuum oven (40°C) to dry for use.

[0035] b) Fabric dip coating modification

[0036] Ti 3 C 2 T x The dispersions of MXene and multi-walled carbon nanotubes (MWCNTs) were blended to prepare homogeneous aqueous dispersions of both (total concentration of 15 mg / mL, Ti 3 C 2 T x The mass ratio to MWCNT is 5:2), and the mixing conditions are: magnetic stirring (600rpm / 40min) and ultrasonic (40KHz / 200W / 40min). The pretreated polyester fabric was immersed in the MXene / MWCNT uniform dispersion for 5 min ( figure 1 ); then ta...

Embodiment 2

[0046] In this example, the preparation method of the conductive coating is similar to that of Example 1, the difference is that cotton fabric is used as the base fabric; MXene / SWCNT is used as the conductive modification component, the mass ratio of the two is 10:3, and the total concentration It is 10mg / mL (mixing treatment conditions are magnetic force 300rpm / 30min, ultrasonic 40KHz / 200W / 20min); dip coating times are 8 times (drying conditions - normal pressure 80℃ / 30min); silicone rubber vulcanization reaction conditions are normal pressure oven 70 ℃ / 3h. The conductive self-cleaning composite fabric prepared in this example also exhibits ideal superhydrophobicity (water contact angle 151.5°), excellent electrical conductivity and electromagnetic shielding performance, excellent mechanical stability and acid corrosion resistance (as shown in Table 1). ).

Embodiment 3

[0048] In this example, the preparation method of the conductive coating is similar to that of Example 1, except that nylon is used as the base fabric; MXene / GO (graphene oxide) is used as the conductive modification component, and the mass ratio of the two is 10:1 , the total concentration is 7mg / mL (the mixing treatment conditions are magnetic force 100rpm / 40min, ultrasonic 40KHz / 200W / 30min); the coating process is spraying, the nozzle diameter is 0.3mm, the distance between the airbrush and the fabric is 5cm, and the airbrush moving speed is 3cm / s, the airbrush adopts one-way spraying, drying conditions - vacuum 70℃ / 30min, spraying times is 7 times; the silicone rubber is condensed room temperature vulcanized silicone rubber (hydroxyl-terminated polysiloxane / ethyl orthosilicate) / Organotin catalyst, n-heptane as solvent, concentration of 1 wt%), and the vulcanization reaction condition is atmospheric pressure oven 60°C / 4h. The conductive self-cleaning composite fabric prepa...

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Abstract

The invention discloses an MXene-based conductive self-cleaning composite fabric for electromagnetic shielding and a preparation method of the MXene-based conductive self-cleaning composite fabric. The method comprises the following steps: firstly, constructing a basic conductive functional coating on a fabric in a manner of dip-coating a mixed solution of MXene and a carbon nanomaterial; secondly, respectively introducing a micro-nano coarse structure and a low surface energy characteristic on the conductive fabric by adopting an in-situ sol-gel method and a coating process, and endowing the fabric coating with a super-hydrophobic functional protective layer. Tests show that the composite fabric material has high conductivity and electromagnetic shielding performance, and the electromagnetic shielding effectiveness value of the composite fabric material in the X wave band can reach 58.4 dB under the optimal condition; meanwhile, due to the specific super-hydrophobic self-cleaning function of the composite conductive fabric, the composite conductive fabric is endowed with excellent environmental stability (such as water resistance, dust resistance, ice resistance, rain and snow resistance) and ideal mechanical / wear-resistant / corrosion-resistant stability. Therefore, the multifunctional conductive self-cleaning composite fabric disclosed by the invention can be applied to the related fields of efficient electromagnetic shielding, electromagnetic wave absorption and the like in a complex and harsh environment.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding, and in particular relates to the preparation of a conductive self-cleaning composite fabric and its electromagnetic shielding application. Background technique [0002] In recent years, with the rapid development of the electronics industry, various electronic products such as mobile phones, computers, and televisions have become an indispensable part of people's life and work. While these electronic products bring convenience to our work and life, the generated electromagnetic waves also cause direct or indirect harm. Electromagnetic wave pollution has become an important threat to human health and the normal operation of precision electronic devices. In order to effectively deal with this problem, the design and development of electromagnetic interference shielding materials has important practical significance. [0003] As a typical electromagnetic shielding material, elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M11/79D06M11/46D06M15/643D06M11/38D06M101/06D06M101/28D06M101/32D06M101/34
CPCD06M11/74D06M11/79D06M11/46D06M15/643D06M11/38D06M2200/12D06M2101/06D06M2101/34D06M2101/28D06M2101/32Y02A30/00
Inventor 张广法韩文庆郑圆圆赵平张跃康孙海权李鹏
Owner QINGDAO UNIV OF SCI & TECH
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