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Highly Transparent, Flexible, and Self-Healable Thermoacoustic Loudspeakers
강동희,조승세,성수진,김영렬,이혜진,최아영,염정희,김민수,김진철,노승만,고현협 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Thermoacoustic (TA) loudspeakers was developed as a novel film speaker that utilizes temperature oscillation to vibrate the surrounding air. Conventional TA loudspeakers have been confronted problems when they got damage on their conductive networks, causing their malfunction. Therefore, introducing self-healing polymers in TA loudspeakers could be an effective way of restoring the damage of conductive networks. In this study, we present self-healable TA loudspeakers based on silver nanowire-poly(urethane- hindered urea) conductive electrodes. Our self-healable electrodes exhibit self-healing for repairing the damages that are caused due to the dynamic reconstruction. The fabricated self-healable TA loudspeakers generate a sound pressure level of 61 dB at 10 kHz. Developed TA speakers can recover the original sound after healing the electrodes. The proposed technique in this study provides powerful platform for the fabrication of TA loudspeakers with excellent self-healing property.