为强化导电3D打印耗材的力学性能,采用丙烯腈-丁二烯-苯乙烯(ABS)对多壁碳纳米管(MWNTs)进行预包覆处理,再熔融共混法制备出MWNTs/ABS导电复合材料。研究发现,ABS预包覆处理改善了MWNTs与ABS基体之间的界面结合,复合材料的拉伸强度、弯曲强度和屈服强度明显改善,但表面包覆也使MWNTs之间的电阻升高,使得复合材料的体积电阻率随预包覆ABS沉积量的加大而上升。采用ABS用量为1%(wt,质量分数)条件下预包覆处理制得的MWNTs/ABS复合材料具有较好的性能,拉伸强度55.73MPa,弯曲强度86.00MPa,屈服强度54.55MPa,冲击强度1.52J/m2,体积电阻率20.31Ω·cm,并将MWNTs/ABS加工成综合性能较好的MWNTs/ABS导电3D打印耗材,该耗材不仅具有优良的力学性能和导电性,而且打印过程流畅,可用于电子功能器件的设计和3D打印。
In order to strengthen the mechanical properties of conductive 3D printing filaments,the MWNTs pre-coated with ABS were employed to fabricate MWNTs/ABS conductive composites by melt blending method.It was noticed that the ABS coating significantly improved the interface bonding between MWNTs and ABS,where the tensile strength,bending strength and yield strength of the composites were improved obviously,but the surface coating also increased the electric resistance between MWNTs,and subsequently enlarged the volume resistivity of the composites with the loading of the ABS deposits on MWNTs.The MWNTs with 1wt% ABS coating were selected to produce the MWNTs/ABS filaments,it had good properties,tensile strength was 55.73MPa,bending strength was 86.00MPa,yield strength was 54.55MPa,impact strength was 1.52J/m2,volume resistivity was 20.31Ω·cm,which exhibited a good combination of mechanical properties,electrical conductivity and printing performance.The filaments were prospective to be applied on the design and 3D printing of various electronic devices.
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基金资助
广西科技计划重点研发项目(桂科AB17292017)
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