TY - JOUR
T1 - Facile fabrication Ni@SiO2/C derived from polysilsesquioxane as strong and broadband microwave absorbers with infrared stealth, flame retardant, and water resistant functions
AU - Du, Hanying
AU - Ren, Jiaqi
AU - Zhang, Donglin
AU - Li, Xiang
AU - Zhang, Wenchao
AU - Yang, Rongjie
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2024/2
Y1 - 2024/2
N2 - It remains a great challenge for magnetic/carbon-based microwave absorbers to achieve both strong and broadband absorption, especially at ultra-low filling ratio. Herein, nickel nanoparticles supported on porous silica/carbon composite (Ni@SiO2/C) derived from POSS was prepared by a facile method. The carbonized Ni@SiO2/C composite offers the following advantages: i) the three-dimensionally porous POSS-derived SiO2/C skeleton provides electron transport paths and enhances conductive dissipation; ii) the porous magnetic/carbon composite provides interfacial polarization to enhance dielectric loss and forms strong magnetic coupling network to enhance magnetic loss; iii) multiple reflections and scattering between the porous framework enhance electromagnetic waves attenuation. Notably, the optimized Ni15@SiO2/C750 achieves high reflection loss of −58.5 dB, and broad effect absorption bandwidth of 8 GHz with a thickness of 2 mm at an ultra-low filling ratio of 3 wt%. Besides, the Ni15@SiO2/C750 has multiple properties of infrared stealth, flame retardancy, and water resistance.
AB - It remains a great challenge for magnetic/carbon-based microwave absorbers to achieve both strong and broadband absorption, especially at ultra-low filling ratio. Herein, nickel nanoparticles supported on porous silica/carbon composite (Ni@SiO2/C) derived from POSS was prepared by a facile method. The carbonized Ni@SiO2/C composite offers the following advantages: i) the three-dimensionally porous POSS-derived SiO2/C skeleton provides electron transport paths and enhances conductive dissipation; ii) the porous magnetic/carbon composite provides interfacial polarization to enhance dielectric loss and forms strong magnetic coupling network to enhance magnetic loss; iii) multiple reflections and scattering between the porous framework enhance electromagnetic waves attenuation. Notably, the optimized Ni15@SiO2/C750 achieves high reflection loss of −58.5 dB, and broad effect absorption bandwidth of 8 GHz with a thickness of 2 mm at an ultra-low filling ratio of 3 wt%. Besides, the Ni15@SiO2/C750 has multiple properties of infrared stealth, flame retardancy, and water resistance.
KW - Flame retardant
KW - Infrared stealth
KW - Microwave absorption
KW - POSS-derived SiO/C composite
UR - http://www.scopus.com/inward/record.url?scp=85181760384&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2023.107884
DO - 10.1016/j.compositesa.2023.107884
M3 - Article
AN - SCOPUS:85181760384
SN - 1359-835X
VL - 177
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
M1 - 107884
ER -