MWNTs／ABS导电3D打印复合耗材的制备与性能

Fabrication and Properties of Conductive MWNTs/ABS Composite 3D Printing Materials

通过双螺杆共混挤出制备不同含量的多壁碳纳米管(MWNTs)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)导电3D打印复合材料。研究了挤出加工次数和MWNTs含量对导电3D打印复合材料的导电性能的影响,分析了不同MWNTs添加量导电3D打印材料的力学行为。结果表明:随挤出加工次数的增加,MWNTs在ABS中的分散更加均匀;增加MWNTs含量不仅可以显著提高3D打印材料的导电性,而且也能提高复合材料的拉伸强度和显微硬度,但材料的韧性下降明显。控制最佳挤出条件,制成了具有防静电功能的导电3D打印复合材料,进行熔融沉积成型(FDM)打印测试效果良好。

Muhi-walled carbon nanotube MWNTs/acrylonitrile-butadiene-styrene copolymer （ABS） conductive 3D printing composite materials were fabricated by using a twin-screw extruder with variant contents of MWNTs. The effect of extrusion mixing operation and the content of MWNTs on the conductivity of the composite materials was investigated, and the change of mechanical properties of the composite materials with different concentrations of MWNTs was also studied. The results showed that the dispersion of MWNTs in the composite materials became more uniform with increasing extrusion pass number,and the increase of MWNTs content in the composite materials leaded to the improvement on tensile strength and micro-hardness,accompanied with the decline of toughness. The conductive 3D printing material with antistatic function was fabricated at a selected extrusion condition,which was well applied on routine 3D printing by using a commercial FDM printer.