PMI泡沫复合材料的太赫兹谱特性实验研究  

Experimental Study of PMI Foam Composite Properties in Terahertz

作　　者：邢砾云[1,2] 崔洪亮[1,3] 施长城[3] 韩晓惠[1] 张紫茵[1] 李薇[3] 马宇婷[1,3] 郑妍[1] 张松年 

机构地区：[1]吉林大学仪器科学与电气工程学院,吉林长春130021 [2]北华大学电气信息工程学院,吉林省吉林市130022 [3]中国科学院重庆绿色智能技术研究院,太赫兹技术研究中心,跨尺度制造技术重庆市重点实验室,重庆400714 [4]吉化集团公司物流中心,吉林省吉林市130022

出　　处：《光谱学与光谱分析》2015年第12期3319-3324,共6页Spectroscopy and Spectral Analysis

基　　金：国家“十二五”科技支撑计划项目(2012BAK04B03);重庆市应用开发重大项目(cstc2013yykfc00007);中国科学院“西部之光”人才培养计划西部博士资助项目;国家教育部回国人员科研基金项目资助

摘　　要：聚甲基丙烯酰亚胺(polymethacrylimide,PMI)泡沫复合材料具有众多优良特性,被广泛应用于航天航空、军工、船舶、汽车及高速列车等各个领域。而作为新型的夹层结构材料,其太赫兹(Terahertz,THz)波段的性能检测尚未见报道。基于THz时域光谱分析方法,对国内外两种型号的PMI泡沫复合材料在太赫兹波段透射及反射的实验获得的时域波形、功率密度谱进行了分析比较,基于MATALB编程、Origin8.0数据处理,应用时域、频域方法计算分析了不同厚度的德固赛(型号:Rohacell WF71)、美沃科技发展有限公司生产的(型号:SP1D80-P-30)PMI泡沫复合材料的透射率(传输函数)、吸收率、反射率以及折射率等光学参数。研究结果表明:通过对比空气、氮气中的不同测量结果,解释了湿度对测量结果的影响。PMI泡沫复合材料的折射率为1.05左右,功率谱的衰减是由于测试平台本身信号较弱、样品较厚且PMI泡沫的内部微结构的散射,造成THz波在>0.6THz波段表现出明显的衰减。该结论为THz波段在PMI泡沫复合材料方面的应用提供了理论依据,同时也为太赫兹无损探伤(non-destructive testing,NDT)技术在PMI泡沫复合材料方面的应用做了一个良好的铺垫。Polymethaerylimide （PMI） foam composite has many excellent properties. Currently, PMI is heat-resistant foam, with the highest strength and stiffness. It is suitable as a high-performance sandwich structure core material. It can replace the honeycomb structure. It is widely used in aerospace, aviation, military, marine, automotive and high-speed trains, etc. But as new sandwich materials, PMI performance testing in the THz band is not yet visible. Based on the Terahertz （THz） time-domain spectroscopy technique, we conducted the transmission and reflection experiments, got the time domain waveforms and power density spectrum. And then we analyzed and compared the signals. The MATALB and Origin 8.0 was used to calculate and obtain the transmittance （transfer function）, absorptivity Coefficient, reflectance and the refractive index of the different thickness Degussa PMI （Model： Rohacell WF71）, which were based on the application of the time-domain and frequency-domain analysis methods. We used the data to compared with the THz refractive index and absorption spectra of a domestic PMI, Baod- ing Meiwo Technology Development Co. , Ltd. （Model： SPID80-P-30）. The result shows that the impact of humidity on the measurement results is obvious. The refractive index of PMI is about 1.05. The attenuation of power spectrum is due to the signal of the test platform is weak, the sample is thick and the internal scattering of PMI foam microstructure, This conclusion provides a theoretical basis for the THz band applications in the composite PMI. It also made a good groundwork for THz NDT （Non-Destructive Testing, NDT） technology in terms of PMI foam composites.

关 键 词：太赫兹 PMI泡沫复合材料 吸收率 折射率 透射率 

分 类 号：O657.3[理学—分析化学]