期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 36, 页码 30732-30740出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b10552
关键词
PVDF; graphene; piezoelectric materials; fabric; sensors
资金
- National Natural Science Foundation of China [11774368, 11704204]
- China Postdoctoral Science Foundation [BX201700271]
Clothing-integrated piezoelectric sensors possess great potential for future wearable electronics. In this paper, we reported a phase-separation approach to fabricate flexible piezoelectric sensors based on poly(vinylidene fluoride) (PVDF)/graphene composite coating on commercially available fabrics (PVDF/graphene@F). The structural units of -CH2- and -CF2- of PVDF chains were arranged directionally due to the structural induction of graphene and water during phase separation, which is the key for electroactive phase enrichment. In optimized case, integrating into fabric substrates endows the phase-out PVDF/graphene composite coating 4 times higher voltage output than its film counterpart. Piezoelectric sensor based on PVDF/graphenep F exhibits a sensitivity of 34 V N-1, which is higher than many reports. It also shows low detecting threshold (0.6 mN), which can be applied to distinguish the voices or monitor the motion of body. This simple and effective approach toward PVDF/graphene@F with excellent flexibility provides a promising route toward the development of wearable piezoelectric sensors.
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