Department of Materials Science and Engineering, Yonsei University , 50, Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.
Department of Materials Science and Engineering, Pohang University of Science and Technology , 77, Cheongam-Ro, Nam-Gu, Pohang 37673, Korea.
ACS Appl Mater Interfaces. 2017 Dec 20;9(50):44096-44105. doi: 10.1021/acsami.7b14504. Epub 2017 Dec 11.
We investigated, for the first time, the conditions where a thermoplastic conductive composite can exhibit completely reversible stretchability at high elongational strains (ε = 1.8). We studied a composite of Au nanosheets and a polystyrene-block-polybutadiene-block-polystyrene block copolymer as an example. The composite had an outstandingly low sheet resistance (0.45 Ω/sq). We found that when a thin thermoplastic composite film is placed on a relatively thicker chemically cross-linked elastomer film, it can follow the reversible elastic behavior of the bottom elastomer. Such elasticity comes from the restoration of the block copolymer microstructure. The strong adhesion of the thermoplastic polymer to the metallic fillers is advantageous in the fabrication of mechanically robust, highly conductive, stretchable electrodes. The chemical stability of the Au composite was used to fabricate high luminescence, stretchable electrochemiluminescence displays with a conventional top-bottom electrode setup and with a horizontal electrode setup.
我们首次研究了在高拉伸应变（ε=1.8）下热塑性导电复合材料能够表现出完全可拉伸性的条件。我们以金纳米片和聚苯乙烯-嵌段-聚丁二烯-嵌段-聚苯乙烯嵌段共聚物的复合材料为例进行了研究。该复合材料具有出色的低面电阻（0.45 Ω/sq）。我们发现，当将薄的热塑性复合材料薄膜放置在相对较厚的化学交联弹性体薄膜上时，它可以跟随底部弹性体的可逆弹性行为。这种弹性来自嵌段共聚物微观结构的恢复。热塑性聚合物与金属填料的强粘附性有利于制造机械坚固、高导电性、可拉伸的电极。金复合材料的化学稳定性被用于制造具有传统顶-底电极设置和水平电极设置的高发光、可拉伸的电致化学发光显示器。
