Abstract
Poly(p-phenylene-2,6-benzobisoxazole)(PBO)fiber and polytetrafluoroethylene(PTFE)resin have been widely acknowledged as excellent wave-transparent materials for future high-frequency applications due to their exceptional dielectric properties.However,the weak interfacial bonding between these two ma-terials hampers their full potential.In this study,we successfully addressed this limitation by enhanc-ing the surface roughness of PBO fibers and introducing active sites through the in-situ grafting of sil-ica nanowires.The added silica acted as an interfacial anchor on the PBO fiber surface,significantly improving the bonding force between PBO and PTFE.PBO/PTFE wave-transparent laminated composites were fabricated using hot compression molding.The results demonstrate that the PBO(treated with in-situ grown silica)/PTFE laminated composites exhibit superior interlaminar shear strength(ILSS),flexural strength,flexural modulus,and tensile modulus compared to the pristine PBO/PTFE laminated compos-ites.Specifically,these properties are found to be 58.6％,32.9％,138.1％,and 25.35％higher,respectively.Additionally,these composites demonstrate low dielectric constant and dielectric loss.Most notably,they achieve a wave transmittance of 91.45％at 10 GHz,indicating significant potential for wide-range applications in next-generation advanced military weapons,such as"lightweight/high-strength/wave-transparent"electromagnetic window materials,as well as civilian communication base stations.
基金项目
National Natural Science Foundation of China(U21A2094)
CASHIPS Director's Fund(YZJJZX202015)
CASHIPS Director's Fund(YZJJ202304-CX)
CASHIPS Director's Fund(YZJJ2023QN36)
Anhui Province Postdoctoral Researcher Research Project(E24F0D27)
Central Government Guiding Local Government Science and Technology Development Special Fund Project(2022ZB09002)
NETL
NSTL
万方数据