TY - JOUR
T1 - Flexible and lightweight microcellular RGO@Pebax composites with synergistic 3D conductive channels and microcracks for piezoresistive sensors
AU - Dong, Diandian
AU - Ma, Jianzhong
AU - Ma, Zhonglei
AU - Chen, Yongmei
AU - Zhang, Hongming
AU - Shao, Liang
AU - Gao, Jinpeng
AU - Wei, Linfeng
AU - Wei, Ajing
AU - Kang, Songlei
N1 - Publisher Copyright:
© 2019
PY - 2019/8
Y1 - 2019/8
N2 - Piezoresistive sensors with high flexibility, lightweight and high sensitivity are crucial in variable conductors and wearable devices. Herein, microcellular poly(ether-block-amide)beads coated with reduced graphene oxide (RGO@Pebax)composites with synergistic 3D conductive channels and microcracks were fabricated via the supercritical CO2 foaming followed by dip-coating hydrogen bond assembly, compression moulding and in-situ reduction. The microcellular RGO@Pebax composites exhibit high flexibility (up to 50% compressibility)and low mass density (down to 0.2 g/cm3)due to the incorporation of microcellular structures and 3D interconnected channels. The resultant microcellular RGO@Pebax composites-based piezoresistive sensors exhibit excellent sensing capacity due to the synergistic effect of double mechanisms: “disconnect-connect” transition of microcracks and increased contact area in the 3D conductive channels. Moreover, the piezoresistive sensors exhibit outstanding reliability and stability during the long-term repeated compression strain. Functional applications of the piezoresistive sensors have been demonstrated, indicating their excellent application potentials in variable conductors and wearable devices.
AB - Piezoresistive sensors with high flexibility, lightweight and high sensitivity are crucial in variable conductors and wearable devices. Herein, microcellular poly(ether-block-amide)beads coated with reduced graphene oxide (RGO@Pebax)composites with synergistic 3D conductive channels and microcracks were fabricated via the supercritical CO2 foaming followed by dip-coating hydrogen bond assembly, compression moulding and in-situ reduction. The microcellular RGO@Pebax composites exhibit high flexibility (up to 50% compressibility)and low mass density (down to 0.2 g/cm3)due to the incorporation of microcellular structures and 3D interconnected channels. The resultant microcellular RGO@Pebax composites-based piezoresistive sensors exhibit excellent sensing capacity due to the synergistic effect of double mechanisms: “disconnect-connect” transition of microcracks and increased contact area in the 3D conductive channels. Moreover, the piezoresistive sensors exhibit outstanding reliability and stability during the long-term repeated compression strain. Functional applications of the piezoresistive sensors have been demonstrated, indicating their excellent application potentials in variable conductors and wearable devices.
KW - 3D conductive channels
KW - Microcellular structures
KW - Piezoresistive sensors
KW - Supercritical CO foaming
UR - http://www.scopus.com/inward/record.url?scp=85065872330&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2019.05.019
DO - 10.1016/j.compositesa.2019.05.019
M3 - 文章
AN - SCOPUS:85065872330
SN - 1359-835X
VL - 123
SP - 222
EP - 231
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -