TY - JOUR
T1 - Smart shape memory composite foam enabled rapid and conformal manipulation of electromagnetic wave absorptions performance
AU - Qian, Chen
AU - Wang, Ding
AU - Zhao, Weikun
AU - Yang, Wentong
AU - Qin, Zhuofan
AU - Zhu, Yaofeng
AU - Xu, Ben Bin
N1 - Funding information: We acknowledge the financial support from the National Natural Science Foundation of China (NSFC) (Grant No. 51503183) and the 111 Project (Grant No. D21011). This study is also supported by a Postdoctoral Foundation of Zhejiang Sci-Tech University Tongxiang Research Institute (Grant No. TYY202104) and the Science Foundation of Zhejiang Sci-Tech University (Grant No. 21212089-Y).
PY - 2023/5/13
Y1 - 2023/5/13
N2 - With the development of communication and electronic technologies, smart electromagnetic wave (EMW) absorption materials with tunable performance are highly desirable for applications under complicated electromagnetic circumstances. However, the performance of the ordinary EMW absorption materials is dominated by their electromagnetic parameters which are constant unless their compositions are changed. This study presents a porous EMW absorption material with adjustable effective absorption bandwidth (EAB) and reflection loss (RL) to satisfy the requirements of tunability for complex electromagnetic applications. First, a composite foam is fabricated by assembling the reduced graphene oxide (rGO) to the melamine sponge (MS) framework. Next, the thermoplastic polyurethane (TPU) is introduced to endow the MS/rGO composites with the desired shape memory property after crosslinking. In specific, the obtained MS/rGO composites show high flexibility, elasticity, and low density of 10.7 mg cm-3, and present the minimum RL of -63.29 dB with EAB of 7.18 GHz. Additionally, the tunable EMW absorption performance of MS/rGO-TPU composites is achieved through their shape memory effect. Notably, the EAB can be adjusted to a wide range from 5.5 to 18 GHz under the compressive deformations of those composites as modulated by cooling/heating, and correspondingly the minimum RL changes from -15.4 dB down to -39.2 dB. In a word, the smart, lightweight MS/rGO and MS/rGO-TPU composite foams with adjustable EMW absorption performance are strong candidates for practical applications in complex electromagnetic fields.
AB - With the development of communication and electronic technologies, smart electromagnetic wave (EMW) absorption materials with tunable performance are highly desirable for applications under complicated electromagnetic circumstances. However, the performance of the ordinary EMW absorption materials is dominated by their electromagnetic parameters which are constant unless their compositions are changed. This study presents a porous EMW absorption material with adjustable effective absorption bandwidth (EAB) and reflection loss (RL) to satisfy the requirements of tunability for complex electromagnetic applications. First, a composite foam is fabricated by assembling the reduced graphene oxide (rGO) to the melamine sponge (MS) framework. Next, the thermoplastic polyurethane (TPU) is introduced to endow the MS/rGO composites with the desired shape memory property after crosslinking. In specific, the obtained MS/rGO composites show high flexibility, elasticity, and low density of 10.7 mg cm-3, and present the minimum RL of -63.29 dB with EAB of 7.18 GHz. Additionally, the tunable EMW absorption performance of MS/rGO-TPU composites is achieved through their shape memory effect. Notably, the EAB can be adjusted to a wide range from 5.5 to 18 GHz under the compressive deformations of those composites as modulated by cooling/heating, and correspondingly the minimum RL changes from -15.4 dB down to -39.2 dB. In a word, the smart, lightweight MS/rGO and MS/rGO-TPU composite foams with adjustable EMW absorption performance are strong candidates for practical applications in complex electromagnetic fields.
KW - electromagnetic wave absorption
KW - shape memory
KW - adjustable performance
KW - composite foam
U2 - 10.1016/j.mtnano.2023.100354
DO - 10.1016/j.mtnano.2023.100354
M3 - Article
JO - Materials Today Nano
JF - Materials Today Nano
SN - 2588-8420
M1 - 100354
ER -