TY - JOUR
T1 - Eco-mimetic nanoarchitecture for green EMI shielding
AU - Wang, Xi Xi
AU - Shu, Jin Cheng
AU - Cao, Wen Qiang
AU - Zhang, Min
AU - Yuan, Jie
AU - Cao, Mao Sheng
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - One big issue in electromagnetic interference (EMI) shielding is ignored, that is no consideration of friendliness to overall environment. Developing green EMI shielding materials is significantly imperative, because strong secondary reflection causes extra environment burden and worsening hazard. However, synergy of high efficiency and less secondary reflection remains challenging. Herein, learning from brilliant wisdom of nature, 3D eco-mimetic nanoarchitecture is constructed for the first time, successfully approaching green efficient EMI shielding. It features 3D hierarchical dual conductive nets, microcosmically reconstructing both spatial and functional characteristics of natural electromagnetic attenuation system, with highly integrated functions. Its shielding effectiveness (SE) and green shielding index (gs) can be increased by tailoring graphene cycles, showing potential for dual functions of electromagnetic wave absorbing and shielding. The SE reaches ∼54 dB with favorable gs (∼1.44), low density (∼0.1 g/cm3), and good thermal stability (∼96%). This arises from synergy of promoted electron hopping, induced multiple polarization centers, assembled magnetic resonance and especially, equivalent wedge effect of honeycomb-like surface. Our findings dig out a new way for developing electromagnetic multifunctional materials with light weight, high efficiency and eco-friendliness in the future.
AB - One big issue in electromagnetic interference (EMI) shielding is ignored, that is no consideration of friendliness to overall environment. Developing green EMI shielding materials is significantly imperative, because strong secondary reflection causes extra environment burden and worsening hazard. However, synergy of high efficiency and less secondary reflection remains challenging. Herein, learning from brilliant wisdom of nature, 3D eco-mimetic nanoarchitecture is constructed for the first time, successfully approaching green efficient EMI shielding. It features 3D hierarchical dual conductive nets, microcosmically reconstructing both spatial and functional characteristics of natural electromagnetic attenuation system, with highly integrated functions. Its shielding effectiveness (SE) and green shielding index (gs) can be increased by tailoring graphene cycles, showing potential for dual functions of electromagnetic wave absorbing and shielding. The SE reaches ∼54 dB with favorable gs (∼1.44), low density (∼0.1 g/cm3), and good thermal stability (∼96%). This arises from synergy of promoted electron hopping, induced multiple polarization centers, assembled magnetic resonance and especially, equivalent wedge effect of honeycomb-like surface. Our findings dig out a new way for developing electromagnetic multifunctional materials with light weight, high efficiency and eco-friendliness in the future.
KW - Eco-friendliness
KW - Eco-mimicry
KW - Electromagnetic interference shielding
KW - Hierarchical structure
KW - Nanoarchitecture
UR - http://www.scopus.com/inward/record.url?scp=85063132541&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2019.03.164
DO - 10.1016/j.cej.2019.03.164
M3 - Article
AN - SCOPUS:85063132541
SN - 1385-8947
VL - 369
SP - 1068
EP - 1077
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -