Ternary Polymeric Composites Exhibiting Bulk and Surface Quadruple-Shape Memory Properties
Ternary Polymeric Composites Exhibiting Bulk and Surface Quadruple-Shape Memory Properties
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DOI：
10.1002/cphc.201800389
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发表时间：
2018-08-17
期刊：
影响因子：
2.9
通讯作者：
Mather, Patrick T.
中科院分区：
文献类型：
--
作者：
Buffington, Shelby L.;Posnick, Benjamin M.;Mather, Patrick T.
我们报告了一种多相四重形状记忆复合材料的设计和表征，该复合材料能够在4个编程形状之间切换，三个临时形状和一个永久形状。我们的方法结合了两个先前报道的制造方法，通过将PCL的静电纺丝垫嵌入作为复合基质的环氧单体和PMMA的混溶共混物中。当环氧聚合发生时，基体在环氧和PMMA材料之间发生相分离。这产生了具有PCL纤维和由相分离的环氧树脂和PMMA组成的两相基质的多相复合材料。所得到的复合材料表现出三个独立的热转变和顺从性，除了一个最终的，平衡形状的三个独立的临时形状的机械编程。此外，四重表面形状记忆能力被成功地证明。这种方法的多功能性为多形状记忆材料提供了很大程度的设计灵活性。
We report the design and characterization of a multiphase quadruple shape memory composite capable of switching between 4 programmed shapes, three temporary and one permanent. Our approach combined two previously reported fabrication methods by embedding an electrospun mat of PCL in a miscible blend of epoxy monomers and PMMA as a composite matrix. As epoxy polymerization occurred the matrix underwent phase separation between the epoxy and PMMA materials. This created a multiphase composite with PCL fibers and a two-phase matrix composed of phase-separated epoxy and PMMA. The resulting composite demonstrated three separate thermal transitions and amenability to mechanical programming of three separate temporary shapes in addition to one final, equilibrium shape. In addition, quadruple surface shape memory abilities are successfully demonstrated. The versatility of this approach offers a large degree of design flexibility for multi-shape memory materials.