二硫化钼/碳纳米管/丁苯橡胶吸波材料的结构与性能

Structure and Property of Microwave Absorber Based on Molybdenum Disulfide/Multi-Walled Carbon Nanotube/Butadiene Styrene Rubber

利用二硫化钼(MoS 2)和多壁碳纳米管(MWCNTs)在形貌和性能上的互补性,通过简单的机械共混制备了性能优异的丁苯橡胶(SBR)吸波复合材料。研究结果表明,MoS 2和MWCNTs共掺有助于促进两者在橡胶基体中的分散,形成更完善的电磁损耗网络;此外,双组分共掺获得了更好的阻抗匹配和介电损耗,MoS 2/MWCNTs/SBR复合材料的反射损耗(RL)达到-37.07 dB,有效吸收频宽(RL<-10 dB)达2.08 GHz,均优于单组分填充的复合材料;填料的加入改善了SBR的力学性能,复合材料的拉伸强度提高了10 MPa以上;与单一填充体系相比,填料共掺对复合材料力学性能影响不大,能满足常规结构件的承载需求。

Microwave absorber based on butadiene styrene rubber(SBR)composite with molybdenum disulfide(MoS 2)and multi-walled carbon nanotubes(MWCNTs)was prepared by a mechanical blending method.With their synergetic effect in morphology and property,the combination of MoS 2 and MWCNTs endows an improved dispersion in SBR matrix,thus providing the composite with better electromagnetic loss network.The MoS 2/MWCNTs/SBR composite shows a reflection loss(RL)of-37.07 dB as well as an effective absorption band(RL<-10 dB)of 2.08 GHz,which are both better than that of MoS 2 or MWCNTs solely incorporated SBR composite.This enhanced electromagnetic performance is attributed to its better impedance matching and dielectric loss.Additionally,the incorporation of nanofillers significantly improves the mechanical property of SBR,the tensile strength of fillers-filled SBR composites are more than 10 times as high as that of neat SBR.Although the use of dual-fillers slightly impacts the mechanical property of resulted composites when it compared with MWCNTs/SBR or MoS 2/SBR composites,it still can be used in some structural demanding fields.