碳纤维复合吸波材料的频散特性影响规律研究

发布时间：2018-04-17 02:28

本文选题：短切碳纤维 + 水性聚氨酯　；参考：《表面技术》2017年04期

【摘要】：目的归纳总结碳纤维长度和含量对碳纤维复合吸波材料(CFCAM)频散特性的影响规律。方法以水性聚氨酯(PR)为基体树脂,碳纤维(CF)为填料,制备了不同长度和含量的CFCAM,采用扫描电镜和X射线衍射仪对CF改性前后的微观形貌和物质结构进行表征,用矢量网络分析仪测试CFCAM介电常数(ε),归纳总结出CF长度、含量对CFCAM的频散特性的影响规律。结果随着CF长度的增大,CFCAM的ε先增大后减小,当CF长度为3 mm时,CFCAM不仅具有较好的频散特性,实部(ε′)和虚部(ε′′)都较大;随着CF含量增大,CFCAM的?增大,当CF质量分数为0.9%时,ε′达到18左右,ε′′达到9左右,预示着该含量下CFCAM有较大的储存能量的能力,并且对电磁波有较强的电损耗能力。结论 3 mm碳纤维在质量分数为0.9%时具有较好的频散特性,适宜用来制备吸波性能强、频带宽的雷达吸波涂层材料。
[Abstract]:Aim to summarize the effect of carbon fiber length and content on dispersion characteristics of carbon fiber composite absorbing material CFCAM.Methods CFCAM of different length and content was prepared with waterborne polyurethane (pu) as matrix resin and carbon fiber (CFC) as filler. The microstructure and structure of CF before and after modification were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD).The dielectric constant (蔚) of CFCAM was measured by vector network analyzer, and the influence of CF length and content on the dispersion characteristics of CFCAM was summarized.Results with the increase of CF length, the 蔚 of CFCAM first increases and then decreases. When CF length is 3 mm, CFCAM not only has good dispersion characteristics, but also has larger real and imaginary parts.When CF mass fraction is 0.9wt%, 蔚'is about 18 and 蔚'is about 9, which indicates that CFCAM has a large energy storage capacity and a strong loss to electromagnetic wave.Conclusion 3mm carbon fiber has good dispersion property when the mass fraction is 0.9mm, which is suitable for preparing radar absorbing coating material with strong absorbing property and bandwidth.
【作者单位】：中国人民解放军后勤工程学院化学与材料工程系;中国人民解放军63983部队;中国人民解放军61517部队;中国人民解放军94786部队;
【基金】：全军后勤科研计划项目(BY115C007)~~
【分类号】：TB34

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