Baniasadi Hossein, Madani Zahra, Mohan Mithila, Vaara Maija, Lipponen Sami, Vapaavuori Jaana, Seppälä Jukka V
Polymer Technology, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland.
Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland.
ACS Appl Mater Interfaces. 2023 Oct 18;15(41):48584-48600. doi: 10.1021/acsami.3c08774. Epub 2023 Oct 3.
This study introduces the development of a thermally responsive shape-morphing fabric using low-melting-point polyamide shape memory actuators. To facilitate the blending of biomaterials, we report the synthesis and characterization of a biopolyamide with a relatively low melting point. Additionally, we present a straightforward and solvent-free method for the compatibilization of starch particles with the synthesized biopolyamide, aiming to enhance the sustainability of polyamide and customize the actuation temperature. Subsequently, homogeneous dispersion of up to 70 wt % compatibilized starch particles into the matrix is achieved. The resulting composites exhibit excellent mechanical properties comparable to those reported for soft and tough materials, making them well suited for textile integration. Furthermore, cyclic thermomechanical tests were conducted to evaluate the shape memory and shape recovery of both plain polyamide and composites. The results confirmed their remarkable shape recovery properties. To demonstrate the potential application of biocomposites in textiles, a heat-responsive fabric was created using thermoresponsive shape memory polymer actuators composed of a biocomposite containing 50 wt % compatibilized starch. This fabric demonstrates the ability to repeatedly undergo significant heat-induced deformations by opening and closing pores, thereby exposing hidden functionalities through heat stimulation. This innovative approach provides a convenient pathway for designing heat-responsive textiles, adding value to state-of-the-art smart textiles.
本研究介绍了一种使用低熔点聚酰胺形状记忆致动器的热响应形状变形织物的开发。为了便于生物材料的共混，我们报告了一种具有相对较低熔点的生物聚酰胺的合成与表征。此外，我们提出了一种简单且无溶剂的方法，用于使淀粉颗粒与合成的生物聚酰胺相容，旨在提高聚酰胺的可持续性并定制致动温度。随后，实现了高达70 wt%的相容化淀粉颗粒在基体中的均匀分散。所得复合材料表现出与报道的柔软坚韧材料相当的优异机械性能，使其非常适合用于纺织品集成。此外，进行了循环热机械测试以评估纯聚酰胺和复合材料的形状记忆和形状恢复性能。结果证实了它们卓越的形状恢复性能。为了证明生物复合材料在纺织品中的潜在应用，使用由含有50 wt%相容化淀粉的生物复合材料组成的热响应形状记忆聚合物致动器制作了一种热响应织物。这种织物展示了通过打开和关闭孔隙反复经历显著热诱导变形的能力，从而通过热刺激展现隐藏功能。这种创新方法为设计热响应纺织品提供了一条便捷途径，为先进的智能纺织品增添了价值。
