摘要
将适量羰基铁吸收剂填充到发泡体系中,采用一步法制备了形貌结构良好的硬质聚氨酯基羰基铁泡沫吸波材料(CIPRPU)。用扫描电子显微镜和矢量网络分析仪对样品的结构及电磁性能进行了表征。结果表明,吸收剂的填充量对电磁参数影响较大,整体上呈现出随吸收剂的填充量升高,电磁参数变大的趋势。CIPRPU的介电常数ε′和ε′′分别在3.0和0.5以下,磁导率μ′和μ′′则分别在1.5和0.5以下。利用测得的电磁参数对CIPRPU的反射率进行了模拟。当厚度为3 mm时,在X波段内,CIPRPU(m(聚氨酯基体):m(吸收剂)=1:5)的峰值吸收达到了–22 d B,表明制备的泡沫型吸波材料能够充分利用其独特的孔结构,使材料由单纯的吸收作用转变为透波–吸波作用,取得了较好吸波效果。
The appropriate amount of carbonyl iron absorbent was filled into the foaming system. The rigid polyurethane-based carbonyl iron foam wave absorption materials （CIPRPU） with good morphology structure were prepared by one-step method. The structure and electromagnetic performance of the samples were characterized by using the scanning electron microscope and the vector network analyzer. The results show that the influence of the filling amount of absorbent on electromagnetic parameters is large. On the whole, it is exhibited that there is the tendency of electromagnetic parameters increasing with increase of absorbent filling amount. The dielectric constants ε＇ and ε＇＇ of CIPRPU are below 3.0 and 0.5 respectively, the magnetic permeabilities μ＇ and μ＇＇ of CIPRPU are below 1.5 and 0.5 respectively. The reflectance of CIPRPU was simulated by using the determined electromagnetic parameters. When the thickness is 3 mm, the peak absorption of CIPRPU （m（polyurethane）：rn（absorbent）=1：5） reached -22 dB in the X-band. It shows that the prepared foam-type wave absorption materials can fully utilize their unique pore structure, make the materials transform from single absorption action to wave transmission-wave absorption action, the better wave absorption effect was obtained.
出处
《化学推进剂与高分子材料》
CAS
2016年第4期64-68,共5页
Chemical Propellants & Polymeric Materials
基金
陕西省自然科学基金(2012SXJJ005)
关键词
硬质聚氨酯泡沫
羰基铁
复合材料
吸波性能
rigid polyurethane foam
carbonyl iron
composite material
wave absorption performance
