کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7833738 | 1503524 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strong and thermostable SiC nanowires/graphene aerogel with enhanced hydrophobicity and electromagnetic wave absorption property
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
SiC nanowires (SiCnws) were incorporated in supercritical-ethanol-dried graphene aerogel (GA-S) via chemical vapor infiltration (CVI) to fabricate a lightweight, thermostable, high-performance electromagnetic (EM) absorbing composite. The SiCnws improved the yield strength of GA-S from 0.15â¯MPa to 0.47â¯MPa in the linear elastic region. The oxidation temperature of GA-S contained in situ grown SiCnw exceeded 660â¯Â°C in air. The double-scale surface roughness increases the water contact angle from 53° of GA-S to 134° of SiCnw/GA-S. The SiCnw/GA-S composite showed a minimum EM wave reflection loss (RL) value of â54.8â¯dB at 5.3â¯GHz with thickness of 3.63â¯mm. The SiCnw/GA-S sample demonstrated a wide effective absorbing bandwidth of 6.5â¯GHz from 9.3 to 15.8â¯GHz at thickness of 2.0â¯mm. In addition, the SiCnw/GA-S sample could achieve effective absorption covering the entire X-band in a wide thickness range of 2.2-2.7â¯mm. Three-dimensional networks and residual oxygen functional groups of GA-S, the high-density stacking faults, and the abundant interfaces between SiCnws and graphene sheets played important roles in enhancing the EM dissipation of SiCnw/GA-S composites. The SiCnw/GA-S composites are promising EM-wave-absorbing materials in extreme environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 448, 1 August 2018, Pages 138-144
Journal: Applied Surface Science - Volume 448, 1 August 2018, Pages 138-144
نویسندگان
Yehong Cheng, Mingyi Tan, Ping Hu, Xinghong Zhang, Boqian Sun, Liwen Yan, Shanbao Zhou, Wenbo Han,