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ABSTRACT
Graphene-based electroconductive textile materials are advantageous over metal/gel-based heating pads for thermotherapy because of their flexibility, processability, and ability to maintain a constant temperature for an extended period. The electro-thermal properties of graphene-based nonwoven depend on its surface resistivity which in turn depends on the amount of graphene oxide (GO) deposition. In this work, highly conductive, flexible, lightweight, and antibacterial graphene functionalized cotton nonwoven with excellent electro-thermal performance is reported. For this, needle punched nonwoven structure is designed and its construction variables (Fabric GSM, punch density, and depth of penetration) are optimized with the Box-Behnken response surface design to achieve maximum GO adsorption and minimum surface resistivity. The lowest surface resistivity of 727.57 Ω sq−1 is achieved at 22.18% GO add-on. The functionalized fabric shows excellent electro-thermal properties and a maximum surface temperature of 118°C is achieved at 30V DC supply. The change in surface resistivity of rGO-cotton (reduced graphene oxide coated cotton) is insignificant even after atmospheric aging for 10 weeks, 4 washings and 10 rubbings. Antibacterial activity of 97.10% is achieved toward Staphylococcus aureus bacterium.
摘要
石墨烯基导电纺织材料比金凝胶基热疗加热垫更具优势, 因为它们具有灵活性, 可加工性和长期保持恒温的能力. 石墨烯基非织造布的电热性能取决于其表面电阻率, 而表面电阻率又取决于氧化石墨烯 (GO) 的沉积量. 本文报道了具有优异电热性能的高导电, 柔性, 轻质, 抗菌石墨烯功能化棉非织造布. 为此, 设计了针刺非织造结构, 并使用Box-Behnken响应面设计对其结构变量 (织物GSM, 穿孔密度和穿透深度) 进行了优化, 以实现最大GO吸附和最小表面电阻率. 最低表面电阻率为727.57 Ω 平方英尺−1以22.18%的附加值实现. 该功能化织物具有优异的电热性能, 在30 V直流电源下, 织物表面最高温度可达118°C. 即使在大气老化10周, 4次洗涤和10次拓片后, rGO棉 (还原氧化石墨烯涂层棉) 的表面电阻率变化也不显著. 对金黄色葡萄球菌的抗菌活性达97.10%.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Supplementary material
Supplemental data for this article can be accessed online at https://doi.org/10.1080/15440478.2022.2079579