摘要
为了获得能够在宽带范围内吸收电磁波的低密度材料,采用多巴胺修饰的方法对碳纤维进行改性,通过负载Fe_(3)O_(4)磁性颗粒制备了一种吸波复合材料。探究了Fe^(3+)浓度、反应时间和煅烧温度对改性效果的影响,并测试了该吸波复合材料的表面形态和吸波性能。试验发现:当Fe^(3+)浓度0.3 mol/L,反应时间8 h,煅烧温度700℃时纤维的改性效果最为理想;Fe_(3)O_(4)纳米粒子能均匀分布在碳纤维表面;制备出的吸波复合材料的最大反射率在11.7 GHz时达到-55.4 dB,有效吸收带宽12.1 GHz。认为:负载纳米Fe_(3)O_(4)磁性颗粒可以有效地提高碳纤维对电磁波的吸收。
In order to obtain the low-density material absorbing electromagnetic wave in wide band,method of dopamine modification was adopted to modify carbon fiber.By carrying Fe_(3)O_(4) magnetic particles,a kind of absorbing composite material was prepared.The influences of Fe^(3+)concentration,reaction time and calcination temperature on the modification effect were explored.The surface morphology and absorber property of the absorber composite material were tested.The experiment showed that the modification effect was the best when the Fe3+concentration was 0.3 mol/L,reaction time was 8 h and the calcination temperature was 700℃.The Fe_(3)O_(4) nano particles could be uniformly distributed on the surface of the carbon fibers.The maximum reflection rate of the absorbing composite material was reached up to-55.4 dB at 11.7 GHz.The effective absorption band was 12.1 GHz.It is considered that the absorbing of electromagnetic wave for carbon fibers can be efficiently improved by carrying nano Fe_(3)O_(4) magnetic particles.
作者
纪月
孙启龙
王鑫
龙啸云
王茹
JI Yue;SUN Qilong;WANG Xin;LONG Xiaoyun;WANG Ru(Nantong University,Nantong,226019,China)
出处
《棉纺织技术》
CAS
北大核心
2021年第5期1-5,共5页
Cotton Textile Technology
基金
江苏省高等学校大学生创新创业训练计划(202010304151H)
南通市科技计划项目(JC2020083)。
