活性碳纤维结构对电路屏复合材料吸波性能影响研究  

Effect of ACF microstructure on microwave absorption properties of ACF felt screen composites

作　　者：夏少旭[1] 李利伟[1] 史燕妮[1] 陈师[1] 吴琪琳[1,2] 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《功能材料》2015年第24期24053-24056,24062,共5页Journal of Functional Materials

基　　金：上海市重点学科建设资助项目(B603)

摘　　要：采用二次活化活性碳纤维（activated carbonfiber,ACF）设计交错结构频率选择表面（FSS）,并制备了吸波复合材料,采用SEM 对碳纤维表面微观形貌进行观察,采用矢量网络分析仪对其微波反射和吸收性能进行了测试.结果表明,随着活化温度的升高,ACF的比表面积及孔径逐渐增大,孔深也逐渐增加.吸波性能随着活化温度的升高呈先增大后降低的趋势,当活化温度为750 ℃时的电路屏制备的复合材料吸波效果最好：在5.2-9.9GHz有-10dB以下的反射,最低反射衰减为-21.1dB;ACF内部π电子的极化弛豫及纤维微观形貌对电磁波的散射损耗能够提高ACF电路屏复合材料吸波性能.The Interleaved structure frequency selective surfaces( FSS) have been designed. And the FSS structures are placed to form microwave absorbing composites. The surface morphology of carbon fiber was observed using the scanning electron microscopy( SEM),and the microwave reflective and absorption properties were measured using the vector network analyzer. Results show that the ACF specific surface area and pore size are gradually increased as the activation temperature increases; the microwave absorbing properties increased at first and decreased subsequently with temperature increasing,and the absorbing performance was the perfect when the re-activated temperature was 750 ℃,the absorption bandwidth of reflection loss below- 10 d B was from 5. 2 to 9. 9 GHz,and the lowest reflection loss was- 21. 1 d B; the electromagnetic scattering losses of π electron polarization relaxation and microstructure in ACF increased the absorbing properties.

关 键 词：活化 活性碳纤维 吸波 微观结构 孔洞 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业] V258[一般工业技术—材料科学与工程]