Conductive Green Graphene inks for Printed Electronics

2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC) Pub Date : 2021-12-12 DOI:10.1109/NMDC50713.2021.9677537

A. A. Al Shboul, Mohsen Ketabi, R. Izquierdo

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Abstract

Aqueous graphene inks were obtained by liquid-phase exfoliation of graphite and bonded to biodegradable polymers. Consequently, green and eco-friendly graphene inks are proposed that are free of VOCs and harmful organic compounds. Three graphene inks indicated as GGe, GTr, and GTw were prepared with corresponding optimized biopolymer concentrations of 0.1 mg.mL−1 of gelatin, 1 mg.mL−1 triton X-100, and 1.5 mg.mL−1 tween-20. The flake diameter distribution for the graphene inks ranged from 100 nm to 800 nm as measured by dynamic light scattering (DLS). GTr is made of smaller flake diameters followed by GTw and GGe has the largest flakes. Graphene films were printed using aerosol jet technique with a 500 nm thickness and their sheet resistance (sR) was of $2.6\ \mathrm{k}\Omega/\square$ for GTr, $5\ \mathrm{k}\Omega/\square$ for GTw, and $14\ \mathrm{k}\Omega/\square$ for GGe. The low sheet resistance for GTr was assigned to better ink wettability and adhesion on top PET substrates. These electrical resistances are suitable for the fabrication of green chemiresistive flexible sensors.

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用于印刷电子的导电绿色石墨烯油墨

水石墨烯油墨是通过石墨的液相剥离得到的，并与可生物降解的聚合物结合。因此，我们提出了不含voc和有害有机化合物的绿色环保石墨烯油墨。制备了三种石墨烯油墨，分别为GGe、GTr和GTw，相应的优化生物聚合物浓度为0.1 mg。mL - 1明胶，1mg。mL -1 triton X-100, 1.5 mg。毫升−1 tween-20。通过动态光散射(DLS)测量，石墨烯油墨的片状直径分布范围为100 ~ 800 nm。GTr的薄片直径较小，其次是GTw, GGe的薄片最大。采用气溶胶喷射技术打印厚度为500 nm的石墨烯薄膜，其片电阻(sR)为:GTr为$2.6\ \ mathm {k}\Omega/\square$， GTw为$5\ mathm {k}\Omega/\square$， GGe为$14\ mathm {k}\Omega/\square$。GTr的低片材阻力归因于更好的油墨润湿性和顶部PET基材的附着力。这些电阻适合制造绿色化学电阻柔性传感器。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)

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