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Water-Based Isotropically Conductive Adhesives: Towards Green and Low-Cost Flexible Electronics

机译：水性各向同性导电胶粘剂：走向绿色且低成本的柔性电子产品

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摘要

This paper reports the first high-performance water-based isotropically conductive adhesives (WBICAs) - a promising material for both electrical interconnects and printed circuits for ultralow-cost flexible/foldable printed electronics. Through combining surface iodination and in situ reduction treatment, the electrically conductivity of the WBICAs are dramatically improved (8 ×10~(-5) Ω2 cm with 80 wt% of silver); moreover, their reliability (stable for at least 1440 h during 85 ℃/85% RH aging) meets the essential requirements for microelectronic applications. Prototyped applications in carrying light emitting diode (LED) arrays and radio frequency identification (RFID) antennas on flexible substrates were demonstrated, which showed satisfactory performances. Moreover, their water-based character may render them more environmentally benign (no volatile organic chemicals involved in the printing and machine maintenance processes), more convenient in processing (reducing the processing steps), and energy economic (thermally sintering the silver fillers and curing the resin is not necessary unlike conventional ICAs). Therefore, they are especially advantageous for mass-fabricating flexible electronic devices when coupled with paper and other low-cost substrate materials such as PET, PI, wood, rubber, and textiles.
机译：本文报道了首个高性能的水性各向同性导电胶（WBICA），这是一种用于超低价柔性/可折叠印刷电子产品的电气互连和印刷电路的有前途的材料。通过结合表面碘化和原位还原处理，大大提高了WBICAs的电导率（8×10〜（-5）Ω2cm，含银量为80 wt％）；此外，它们的可靠性（在85℃/ 85％RH老化下至少可稳定1440小时）符合微电子应用的基本要求。演示了在柔性基板上承载发光二极管（LED）阵列和射频识别（RFID）天线的原型应用，显示出令人满意的性能。此外，它们的水基特性可能使其对环境更无害（在印刷和机器维护过程中不涉及挥发性有机化学品），在加工中更方便（减少加工步骤），并节省能源（热烧结银填料并固化）与传统的ICA不同，该树脂不是必需的）。因此，当与纸和其他低成本基材（如PET，PI，木材，橡胶和纺织品）结合使用时，它们对于大规模制造柔性电子设备特别有利。

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  • 来源
    《Advanced Functional Materials》 |2011年第23期|p.4582-4588|共7页
  • 作者

    Cheng Yang; Wei Lin; Zhongyu Li; Rongwei Zhang; Haoran Wen; Bo Gao; Guohua Chen; Ping Gao; Matthew M. F. Yuen; Ching Ping Wong;

  • 作者单位

    Division of Energy & Environment Graduate School at Shenzhen Tsinghua University 2279 Li Shui Road, Shenzhen, Guangdong Province, P. R. China Department of Mechanical Engineering The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong, P. R. China School of Materials and Engineering Georgia Institute of Technology 771 Ferst Drive, Atlanta, GA, 30332-0245, USA;

    School of Materials and Engineering Georgia Institute of Technology 771 Ferst Drive, Atlanta, GA, 30332-0245, USA;

    Department of Chemical and Biomolecular Engineering The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong, P. R. China;

    School of Materials and Engineering Georgia Institute of Technology 771 Ferst Drive, Atlanta, GA, 30332-0245, USA;

    Department of Mechanical Engineering The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong, P. R. China;

    Department of Mechanical Engineering The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong, P. R. China;

    Department of Chemical and Biomolecular Engineering The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong, P. R. China;

    Department of Chemical and Biomolecular Engineering The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong, P. R. China;

    Department of Mechanical Engineering The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong, P. R. China;

    School of Materials and Engineering Georgia Institute of Technology 771 Ferst Drive, Atlanta, GA, 30332-0245, USA;

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