Reactive Extrusion Additive Manufacturing (REAM) of Functionally Graded, Magneto-Active Thermoset Composites
Reactive Extrusion Additive Manufacturing (REAM) of Functionally Graded, Magneto-Active Thermoset Composites
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DOI：
10.1016/j.addma.2023.103486
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发表时间：
2023-03
影响因子：
11
通讯作者：
O. Uitz;Rui Leng;Tan Pan;Xiaoyue Zhao;A. Oridate;Carolyn C. Seepersad;Z. Ounaies;M. Frecker
中科院分区：
文献类型：
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作者：
O. Uitz;Rui Leng;Tan Pan;Xiaoyue Zhao;A. Oridate;Carolyn C. Seepersad;Z. Ounaies;M. Frecker
反应挤出添加剂制造(REAM)是运动控制喷嘴混合并立即沉积多组分热固性树脂以产生在环境中快速固化的分层部件的过程。通过按需混合颗粒填充的树脂和整齐的树脂，可以对材料结构和由此产生的部件性能进行功能分级。本研究研究了一种两组分的形状记忆聚合物，其中环氧树脂与固化剂相结合，以制备具有结构完整性和形状记忆性能的热固性聚合物部件。将磁性氧化铁颗粒添加到环氧树脂中，以创建填充树脂，该填充树脂根据需要与整齐的环氧树脂和固化剂混合；控制混合和沉积导致定制的氧化铁含量在部件内的空间分布。在表征了环氧树脂的形状记忆性能后，分别对磁活性复合材料进行了热场和磁场作用下的形状编程和驱动，论证了功能级配对形状记忆聚合物磁性能的影响。建立了预测热固性复合材料磁场响应行为的解析模型。
Reactive extrusion additive manufacturing (REAM) is a process in which a motion-controlled nozzle mixes and immediately deposits a multi-part thermoset resin to create layered parts that cure rapidly in the ambient environment. By mixing particle-filled and neat resins on demand, it is possible to functionally grade both the material structure and the resulting properties of the parts. This research investigates a two-part shape memory polymer in which an epoxy resin is combined with a curing agent to yield a thermoset polymer part with structural integrity and shape memory properties. Magneto-active iron oxide particles are added to the epoxy resin to create a filled resin that is mixed on demand with neat epoxy resin and curing agent; control over the mixing and deposition results in a customized distribution of iron oxide content spatially within a part. After characterizing the shape memory properties of the matrix epoxy, the magneto-active composites are shape programmed and actuated via the application of thermal and magnetic fields, respectively, and the effect of the functional grading on the magneto-active properties of the shape memory polymer is demonstrated. Analytical models are derived to predict the magnetic field-responsive behavior of the thermoset composites.