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Fracture‐Induced Mechanoelectrical Sensitivities of Paper‐Based Nanocomposites
Author(s) -
Zhang Jinyuan,
Lee GilYong,
Cerwyn Chiew,
Yang Jinkyu,
Fondjo Fabrice,
Kim JongHoon,
Taya Minoru,
Gao Dayong,
Chung JaeHyun
Publication year - 2018
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201700266
Subject(s) - materials science , composite material , piezoresistive effect , tension (geology) , carbon nanotube , composite number , nanocomposite , fracture (geology) , microporous material , capacitive sensing , perpendicular , resistive touchscreen , ultimate tensile strength , electrical engineering , geometry , mathematics , engineering
Nanostructured composites built with microporous cellulose fibers and carbon nanotubes (CNTs) have potential impacts in the fields of energy storage, sensors, and flexible electronics. Few results have been shown for high mechanoelectrical sensitivity of CNT‐paper composite because of numerous current paths in the network. Here, CNT‐paper‐based nanostructured composite sensors whose sensitivities are generated by controlled tensile fracture of the composite are presented. Under uniaxial load, the cellulose fibers in the paper experience straightening, stiffening, and fracture. The cellulose fibers originally parallel to the tension are fractured while those inclined and perpendicular to the tension are reorganized to form crossbar junctions in the vicinity of a crack. The cross junctions exhibit resistive and capacitive sensitivity to the out‐of‐plane force by the compression of the junctions. Such piezoresistive and piezocapacitive sensitivities are characterized and evaluated for human behavior monitoring.