Significantly improved interfacial properties of silicon dioxide nanowire functionalized poly(p-phenylene-2,6-benzobisoxazole)(PBO)fibers/polytetrafluoroethylene(PTFE)wave-transparent laminated composites  

作　　者：Xusheng He Chao Xiao Huichao Du Yanyan Wang Xin Ding Kang Zheng Meng Xue Xingyou Tian Xian Zhang 

机构地区：[1]Key Laboratory of Photovoltaic and Energy Conservation Materials,Institute of Solid State Physics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China [2]University of Science and Technology of China,Hefei 230026,China [3]School of Materials Science and Engineering,Anhui University,Hefei 230601,China [4]Lu’an Branch,Anhui Institute of Innovation for Industrial Technology,Lu’an 237000,China [5]Guangdong Banggu Film Coatings Innovation Academy Co.,Ltd.,Nanxiong 512400,China

出　　处：《Journal of Materials Science & Technology》2024年第16期232-240,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.U21A2094);CASHIPS Director’s Fund(Nos.YZJJZX202015,YZJJ202304-CX,YZJJ2023QN36);Anhui Province Postdoctoral Researcher Research Project(No.E24F0D27);Central Government Guiding Local Government Science and Technology Development Special Fund Project(No.2022ZB09002).

摘　　要：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 materials hampers their full potential.In this study,we successfully addressed this limitation by enhancing the surface roughness of PBO fibers and introducing active sites through the insitu grafting of silica 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 insitu 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 composites.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/wavetransparent”electromagnetic window materials,as well as civilian communication base stations.

关 键 词：PBO fibers PTFE Silicon dioxide nanowires Wave-transparent laminated composites 

分 类 号：TB33[一般工业技术—材料科学与工程]