聚芳醚酮基复合吸波材料的制备及性能

以磁性多孔碳(WPC/MNPs-80)作为吸波剂材料, 通过溶液共混方式将其与聚芳醚酮复合, 制备了聚芳醚酮基复合吸波材料(6F-PAEK-Crosslink@WPC/MNPs-80). 为了通过溶液共混的方式制备复合材料并避免成膜过程中吸波剂的沉降问题, 设计合成了含有氨基与六氟异丙基的可溶性可交联型聚芳醚酮(6F-PAEK-NH₂). 结果表明, 在交联剂作用下形成的交联结构不仅避免了吸波剂粒子沉降, 而且还赋予了材料优异的耐热性能和力学性能. 此外, 6F-PAEK-Crosslink@WPC/MNPs-80还具有优异的吸波性能, 当复合膜厚度为1.4 mm时, 最大反射损耗达到了-33 dB, 损耗超过-10 dB的频带宽度达到4.8 GHz; 当复合膜厚度为1.8 mm时, 最大反射损耗为-44.5 dB, 损耗超过-10 dB的频带宽度达到3.1 GHz.因此, 6F-PAEK-Crosslink@WPC/MNPs-80是一种综合性能优异的电磁波吸收材料.

Preparation and Properties of Polyaryletherketones-based Electromagnetic Wave Absorption Composite Material

Magnetic porous carbon composite absorber（WPC/MNPs-80） developed in our previous work was specially selected to synthesize polyaryletherketones（PAEK） based electromagnetic wave absorption material（6F-PAEK-Crosslink@WPC/MNPs-80） through a solution blend method. In order to improve the solubility of the polymer matrix and solve the deposition problem of the absorber particles during the membrane-forming process， PAEK with hexafluoroisopropyl and amino groups（6F-PAEK-NH₂） was designed and synthesized. According to the results， the crosslinked structure of the matrix can not only solve the deposition problem but also bring the composite material with excellent properties， such as thermal property and mechanical property. 6F-PAEK-Crosslink@WPC/MNPs-80 shows fine electromagnetic（EM） absorbency. The minimum RL value of -33 dB is obtained with the bandwidth of 4.8 GHz at a membrane thickness of 1.4 mm， while a minimum Reflection loss（RL） value of -44.5 dB is obtained with the bandwidth of 3.1 GHz at a membrane thickness of 1.8 mm. Therefore， 6F-PAEK-Crosslink@WPC/MNPs-80 is a promising candidate for electromagnetic wave attenuation because of its excellent comprehensive properties.