材料科学
纳米复合材料
芳纶
复合材料
纳米纤维
纳米线
极限抗拉强度
电阻和电导
纳米技术
纤维
作者
Zhonglei Ma,Songlei Kang,Jianzhong Ma,Liang Shao,Ajing Wei,Chaobo Liang,Junwei Gu,Bin Yang,Diandian Dong,Linfeng Wei,Zhanyou Ji
出处
期刊:ACS Nano
[American Chemical Society]
日期:2019-06-18
卷期号:13 (7): 7578-7590
被引量:303
标识
DOI:10.1021/acsnano.9b00434
摘要
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 Rs 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/m2), 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.
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