Electromagnetic interference shielding of 3D-printed graphene–polyamide-6 composites with 3D-printed morphology

2021 ◽  
pp. 102020
Author(s):  
Kok Peng Marcian Lee ◽  
Thomas Baum ◽  
Robert Shanks ◽  
Fugen Daver
Keyword(s):  
Electromagnetic Interference ◽  
Polyamide 6 ◽  
Electromagnetic Interference Shielding ◽  
3D Printed

3D printed honeycomb spacers: Tailoring sandwich structures for enhanced electromagnetic shielding

2018 ◽  
Vol 37 (16) ◽  
pp. 1072-1082 ◽  
Author(s):  
Yi-Sheng Hong ◽  
Xiao-Feng Lu ◽  
Xiao-Lei Zhu ◽  
Kai-Lun Zhang ◽  
Mingji Chen
Keyword(s):  
Carbon Nanotube ◽  
Electromagnetic Interference ◽  
High Performance ◽  
Sandwich Structures ◽  
Critical Role ◽  
Electromagnetic Emission ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Honeycomb Structures ◽  
3D Printed

For the purpose of preventing electromagnetic emission, effective electromagnetic interference shielding materials are actively pursued. In this work, three-dimensional (3D) printing technology was employed to manipulate the honeycomb spacers, which were further assembled into multilayered graphene (GN) film-based sandwich structures. Aiming to tuning the dimensions and shapes of the conductive components in the spacers, various sizes of 3D printed honeycomb frameworks along with different conductive composites were fabricated for understanding the effects of sandwich structures and components on the electromagnetic interference shielding. By tailoring the multiple reflection of conductive interface and absorption of spacer, the as-fabricated electromagnetic interference shielding sandwich structures with a thickness of 2 mm shows considerably high shielding effectiveness (49–54.5 dB) in the X-band. With incorporating the carbon nanotube/plasticine composite into the 3D printed honeycomb structures, the tunable permittivity of the composites and designable structure of 3D printed spacer allow for substantially tuning the electromagnetic interference shielding performance in the sandwich structures. The results exhibit that both spacer thickness and the ratios of carbon nanotube-based plasticine composite to 3D printed honeycomb structures play the critical role in dominating the absorption and reflection effectiveness, suggesting novel strategy for fabricating advanced high-performance electromagnetic interference shielding structures.

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