MXene基复合油墨导电织物的制备及性能

Preparation and properties of MXene-based composite ink-coated conductive fabrics

  • 摘要: 在纺织品表面印刷涂覆电活性油墨制造个人防护设备受到广泛关注。本文通过没食子酸(GA)及聚苯胺(PANI)对MXene油墨进行修饰与掺杂,配制出可调流变性的MXene基复合油墨,并采用丝网印刷方式制备出具有优异导电性能的涂层织物。探究了油墨流变性调控工艺,分析了织物导电性及性能稳定性,评估了导电织物的电磁界面(EMI)屏蔽及红外(IR)屏蔽性能。实验结果表明:在3 mL 20 mg/mL的MXene油墨中添加0.25 mg/mL的GA、22.5 mg的PANI时,复合油墨黏度值可达493000 mPa·s;丝网印刷织物电阻低至29.81 Ω,在高温及自然存放下具有导电稳定性。在X波段范围内,涂层织物的EMI屏蔽效能值超过20 dB,可以屏蔽99.0%以上的电磁波;当100℃加热时,涂层织物与原始织物的表面温差接近25℃,具备IR热伪装潜力。该研究为构建新型导电涂层防护纺织品提供了一条新思路。

     

    Abstract: The printing and coating of electroactive inks onto fabric surfaces for the manufacture of personal protective equipment has attracted widespread attention. In this study, MXene ink was modified and doped with the gallic acid (GA) and the polyaniline (PANI) to formulate MXene-based composite inks with tunable rheological properties. Screen printing was then used to produce coated fabrics with excellent electrical conductivity. Methods for controlling ink rheology were investigated, the conductivity and performance stability of printed fabrics were analyzed, and the electromagnetic interference (EMI) shielding and infrared (IR) shielding properties of conductive fabrics were evaluated. The experimental results show that when 0.25 mg/mL of GA and 22.5 mg of PANI are added to 3 mL of 20 mg/mL MXene ink, the viscosity of the composite ink can reach 493,000 mPa·s; After screen printing, the fabric has a resistance as low as 29.81 Ω and exhibits stable electrical conductivity under high-temperature conditions and during natural storage; In the X-band range, the EMI SET value of the coated fabric exceeds 20 dB, shielding more than 99.0% of electromagnetic waves; When heated to 100℃, the temperature difference between the surface of the coated fabric and that of the original fabric is nearly 25℃, with the potential for IR thermal camouflage. This study provides a new approach to developing a new type of conductive-coated protective fabric.

     

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