3D打印碳纤维吸波材料具有广泛的应用前景,为使碳纤维均匀分布在3D打印丝材内部,对碳纤维预处理工艺进行了探究。将分散剂化学分散与球磨相结合,具体探讨了碳纤维团聚对丝材成型性以及吸波性能的影响;不同球磨时间下碳纤维与丙烯腈/丁二烯/苯乙烯共聚物(ABS)的分布状态。结果表明:分散剂与球磨结合的方式可使碳纤维以单根形式均匀分布;球磨处理后碳纤维丝材内部孔洞变少,吸波性能得到提高;在经过分散剂分散并球磨10min处理后制备的吸波结构在X波段的平均反射率达到-8.88dB。可为碳纤维树脂基复合材料组合打印制备宽频、轻薄、力学性能良好的复杂结构吸波材料打下基础。
3D printed carbon fiber wave-absorbing materials have great application potential.To evenly distribute carbon fibers within 3D printed filaments,an exploration of the carbon fiber pretreatment process was carried out.This paper combined chemical dispersion using a dispersant with ball milling.Specifically,the impact of carbon fiber agglomeration on the formability of filaments and wave-absorbing performance was investigated,along with the distribution of carbon fibers and acrylonitrile-butadiene-styrene (ABS) under different ball-milling times.The experimental results indicated that combining a dispersant and ball milling could evenly distribute carbon fibers in a single-fiber form.After ball-milling treatment,the number of holes inside the carbon fiber filaments was reduced and the wave-absorbing performance was enhanced.The average reflectivity in the X-band of the wave-absorbing structure,prepared after being dispersed by the dispersant and ball-milled for ten minutes,reached -8.88dB.This research paves the way for the combined printing of carbon fiber resin-based composite materials to produce complex-structured wave-absorbing materials with wide-frequency,lightweight,thin,and good mechanical properties.
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