应用于3D打印技术的ABS/纳米二氧化钛复合材料制备及力学性能研究

以丙烯腈-丁二烯-苯乙烯共聚物(ABS)为基体及自制的纳米二氧化钛(nano-TiO2)为改性剂,利用加热混制法制备ABS/nano-TiO2复合材料,混炼时以不同质量分数的nano-TiO2进行混炼。针对复合材料的动态力学性能(储能模量和损耗模量)和静态力学性能(拉伸强度、杨氏模量和硬度),对混制挤压成型的线材及3D打印的试样进行对比分析。通过扫描电子显微镜(SEM)分析可知,二氧化钛粉末为纳米级,能量色散X射线光谱(EDS)分析表明,元素含量和种类与设计一致。结果显示,通过添加nano-TiO2,可以提高ABS的拉伸强度、硬度、储能模量及损耗模量;且随着温度增加,ABS/nano-TiO2复合材料的储能模量降低,而损耗模量增加。研究结果可知,添加nano-TiO2可以提升ABS/nano-TiO2复合材料的力学性能,且经3D打印成型试样的各项性能保持稳定。

Research on Fabrication and Mechanical Properties of ABS with TiO2 Nanoparticles Applied to 3D Printing Technology

Taking acrylonitrile-butadiene-styrene-copolymer(ABS)as matrix,and self-prepared nano-TiO2 as modifier,the ABS/nano-TiO2 composites was prepared via a heating mixed method with different mass fraction of nano-TiO2.They were subjected to properties testing and then were compared,including the dynamic mechanical performance(storage modulus and loss modulus)and static mechanical properties(tensile strength,Young s modulus and hardness).It was observed that the prepared titanium dioxide was nano-scale by scanning electron microscope(SEM),and energy dispersive X-ray spectroscopy(EDS)analyzed that the proportion of elements were the same as the design.The experimental results show that the mechanical strength,hardness,storage modulus and loss modulus of ABS filaments are increased by adding nano-TiO2.And as the temperature increases,the storage modulus decreases and the loss modulus increases.The results show that mechanical properties of ABS can be improved by adding nano-TiO2,and the various properties are stable for 3D printing filament using ABS/nano-TiO2 composites.