直写打印高聚物形状记忆复合材料制备与性能

Preparation and Properties of Direct-write Printing Shape Memory Polymer Composites

形状记忆聚合物目前在各领域具有广阔的应用前景,但其成型所依赖的模具形状难以做得非常复杂,很难满足新兴高科技领域对器件结构复杂性的需求,利用3D打印的方法制备形状记忆聚合物可以克服传统制备方法的诸多缺点。本研究将乙炔炭黑(ACB)与双酚A型环氧树脂(E51)共混,制备出不同ACB含量的环氧树脂基墨水。研究了墨水可打印性与流变性能的关系,筛选出四种可打印墨水,然后利用直接喷墨式打印技术制备环氧树脂基形状记忆复合材料,通过扫描电镜(SEM)观测填料的分布情况,研究了ACB含量对该复合材料玻璃化转变温度、动态力学行为、准静态力学性能、形状记忆性能的影响,为3D打印制备形状记忆聚合物以及环氧树脂基形状记忆聚合物更广泛的应用提供了参考。

Shape memory polymers currently had broad application prospects in various fields,but their formation relied on complex mold shapes that were difficult to manufacture,making it difficult to meet the demand for device structure complexity in emerging high-tech fields.The use of three dimensional(3D)printing to prepare shape memory polymers could overcome many drawbacks of traditional preparation methods.In this study,the epoxy resin based inks with different acetylene carbon black(ACB)contents were prepared by blending ACB with bisphenol A epoxy resin(E51).The relationship between printable ink and rheological properties was studied.Four kings of printable inks were selected,and then epoxy resin based shape memory composite materials were prepared by direct inkjet printing technology.The filler distribution was observed by scanning electron microscope(SEM).The effects of ACB content on the glass transition temperature,dynamic mechanical behavior,quasi-static mechanical properties and shape memory properties of the composites were studied,that provided a reference for 3D printing preparation of shape memory polymers and epoxy resin based shape memory polymers more widely used.