Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 12, Pages 9314-9320Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am5017039
Keywords
graphene; graphite; nanoparticles; composites; sensors; fiber
Funding
- Air Force Office of Scientific Research (AFOSR)
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A graphite nanoplatelet (GNP) thin film enabled ID fiber sensor (GNP-FibSen) was fabricated by a continuous roll-to-roll spray coating process, characterized by scanning electron microscopy and Raman spectroscopy and evaluated by coupled electrical-mechanical tensile testing. The neat GNP-FibSen sensor shows very high gauge sensitivity with a gauge factor of similar to 17. By embedding the sensor in fiberglass prepreg laminate parts, the dual functionalities of the GNP-FibSen sensor were demonstrated. In the manufacturing process, the resistance change of the embedded sensor provides valuable local resin curing information. After the manufacturing process, the same sensor is able to map the strain/stress states and detect the failure of the host composite. The superior durability of the embedded GNP-FibSen sensor has been demonstrated through 10 000 cycles of coupled electromechanical tests.
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