Ma Zhonglei, Kang Songlei, Ma Jianzhong, Shao Liang, Wei Ajing, Liang Chaobo, Gu Junwei, Yang Bin, Dong Diandian, Wei Linfeng, Ji Zhanyou
College of Chemistry and Chemical Engineering, Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi Key Laboratory of Chemical Additives for Industry , Shaanxi University of Science and Technology , Xi'an , Shaanxi 710021 , People's Republic of China.
College of Bioresources Chemical and Materials Engineering , Shaanxi University of Science and Technology , Xi'an , Shaanxi 710021 , People's Republic of China.
ACS Nano. 2019 Jul 23;13(7):7578-7590. doi: 10.1021/acsnano.9b00434. Epub 2019 Jun 22.
High-performance and rapid response electrical heaters with ultraflexibility, superior heat resistance, and mechanical properties are highly desirable for the development of wearable devices, artificial intelligence, and high-performance heating systems in areas such as aerospace and the military. Herein, a facile and efficient two-step vacuum-assisted filtration followed by hot-pressing approach is presented to fabricate versatile electrical heaters based on the high-performance aramid nanofibers (ANFs) and highly conductive Ag nanowires (AgNWs). The resultant ANF/AgNW nanocomposite papers present ultraflexibility, extremely low sheet resistance (minimum of 0.12 Ω/sq), and outstanding heat resistance (thermal degradation temperature above 500 °C) and mechanical properties (tensile strength of 285.7 MPa, tensile modulus of 6.51 GPa with a AgNW area fraction of 0.4 g/m), benefiting from the partial embedding of AgNWs into the ANF substrate and the extensive hydrogen-bonding interactions. Moreover, the ANF/AgNW nanocomposite paper-based electrical heaters exhibit satisfyingly high heating temperatures (up to ∼200 °C) with rapid response time (10-30 s) at low AgNW area fractions and supplied voltages (0.5-5 V) and possess sufficient heating reliability, stability, and repeatability during the long-term and repeated heating and cooling cycles. Fully functional applications of the ANF/AgNW nanocomposite paper-based electrical heaters are demonstrated, indicating their excellent potential for emerging electronic applications such as wearable devices, artificial intelligence, and high-performance heating systems.
具有超柔韧性、优异耐热性和机械性能的高性能快速响应电加热器，对于可穿戴设备、人工智能以及航空航天和军事等领域的高性能加热系统的发展极为重要。在此，我们提出了一种简便高效的两步真空辅助过滤后热压方法，以制备基于高性能芳纶纳米纤维（ANF）和高导电性银纳米线（AgNW）的多功能电加热器。所得的ANF/AgNW纳米复合纸具有超柔韧性、极低的表面电阻（最低0.12Ω/sq）、出色的耐热性（热降解温度高于500°C）和机械性能（当AgNW面积分数为0.4g/m时，拉伸强度为285.7MPa，拉伸模量为6.51GPa），这得益于AgNW部分嵌入ANF基体以及广泛的氢键相互作用。此外，基于ANF/AgNW纳米复合纸的电加热器在低AgNW面积分数和低供电电压（0.5 - 5V）下表现出令人满意的高加热温度（高达约200°C）和快速响应时间（10 - 30s），并且在长期反复加热和冷却循环过程中具有足够的加热可靠性、稳定性和可重复性。展示了基于ANF/AgNW纳米复合纸的电加热器的全功能应用，表明它们在可穿戴设备、人工智能和高性能加热系统等新兴电子应用方面具有优异的潜力。
