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HIGH PERFORMANCE TRIBOELECTRIC NANOGENERATOR AND ITS APPLICATIONS

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HIGH PERFORMANCE TRIBOELECTRIC NANOGENERATOR AND ITS APPLICATIONS ( high-performance-triboelectric-nanogenerator-and-its-applica )

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exposed for 0 s, 10 s, 60 s, and 90 s. The formation of carbonyl peak at 1680 cm-1 were compared to the monomer oPA for indication of the extent of polymer degradation. 2.4.5.4 Fabrication and Measurement of TENGs for Triboelectric Series Six TENGs having PPHA and six different reference materials (PU, nylon, PE, PET, Kapton and FEP) in contact and separation were fabricated to locate the relative position of PPHA in the triboelectric series. Acrylic plates (15 mm wide ×15 mm long × 1/8 inch thick) were used as substrates. For the side with PPHA, the acrylic plates were covered with foam tape, Cu tape and PPHA sequentially. For the side with reference materials, the acrylic plates were covered with Cu tape and reference materials sequentially. The contact-separation motion between the PPHA and reference materials were driven by a linear motor with a maximum gap distance of 20 mm. The electrical outputs were measured using a Keithley 6514 electrometer. 2.4.5.5 Fabrication of PPHA-Ag films Ag NWs dispersion was firstly diluted using IPA with a volume ratio of 1:5, and then coated onto clean glass substrates using pipettes. The glass substrates were placed on an optical table overnight to ensure uniform coating of Ag NWs and the complete dry of IPA. Nylon strips were used as fences to create enclosed area on glass substrates to control the surface area and thickness (100 μm) of the casted PPHA layers. PPHA was formulated as described above and uniformly poured into the prepared glass substrates. All films were allowed to dry following the same procedure as described above. The pressure-dried films were allowed for further drying for 24 hours in a dark ambient environment. A razor blade was then used to lift off a corner of the PPHA-Ag film from the glass substrate. Films were 72

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