A highly stretchable and sensitive strain sensor based on graphene-elastomer composites with a novel double-interconnected network

作者：Lin, Yong; Liu, Shuqi; Chen, Song; Wei, Yong; Dong, Xuchu; Liu, Lan^*

来源：Journal of Materials Chemistry C, 2016, 4(26): 6345-6352.

DOI：10.1039/c6tc01925k

• NATURAL-RUBBER COMPOSITES
• HUMAN MOTION
• POLYMER COMPOSITES
• NANOCOMPOSITES
• PERFORMANCE
• GAUGE

The construction of a continuous conductive network with a low percolation threshold plays a key role in fabricating a high performance strain sensor. Herein, a highly stretchable and sensitive strain sensor based on binary rubber blend/graphene was fabricated by a simple and effective assembly approach. A novel double-interconnected network composed of compactly continuous graphene conductive networks was designed and constructed using the composites, thereby resulting in an ultralow percolation threshold of 0.3 vol%, approximately 12-fold lower than that of the conventional graphene-based composites with a homogeneously dispersed morphology (4.0 vol%). Near the percolation threshold, the sensors could be stretched in excess of 100% applied strain, and exhibited a high stretchability, sensitivity ( gauge factor similar to 82.5) and good reproducibility (similar to 300 cycles) of up to 100% strain under cyclic tensile tests. The proposed strategy provides a novel effective approach for constructing a double-interconnected conductive network using polymer composites, and is very competitive for developing and designing high performance strain sensors.

• 出版日期2016
• 单位华南理工大学