Abstract：
Intelligent materials derived from green and renewable bio-based materials garner widespread attention recently. Herein, shape memory polyurethane composite (PUTA/Fe) with fast response to near-infrared (NIR) light is successfully prepared by introducing Fe3+ into the tannic acid-based polyurethane (PUTA) matrix through coordination between Fe3+ and tannic acid. The results show that the excellent NIR light response ability is due to the even distribution of Fe3+ filler with good photo-thermal conversion ability. With the increase of Fe3+ content, the NIR light response shape recovery rate of PUTA/Fe composite films is significantly improved, and the shape recovery time is reduced from over 60 s to 40 s. In addition, the mechanical properties of PUTA/Fe composite film are also improved. Importantly, owing to the dynamic phenol-carbamate network within the polymer matrix, the PUTA/Fe composite film can reshape its permanent shape through topological rearrangement and show its good NIR light response shape memory performance. Therefore, PUTA/Fe composites with high content of bio-based material (TA content of 15.1-19.4%) demonstrate the shape memory characteristics of fast response to NIR light; so, it will have great potential in the application of new intelligent materials including efficient and environmentally friendly smart photothermal responder.
摘要：
近年来，基于绿色和可再生生物基材料的智能材料受到了广泛的关注。在这里，通过将Fe3引入单宁酸基聚氨酯（PUTA）基质中，通过Fe3与单宁酸之间的配位，成功制备了对近红外（NIR）光具有快速响应的形状记忆聚氨酯复合材料（PUTA/Fe）。结果表明，优异的NIR光响应能力是由于Fe3+填料分布均匀，具有良好的光热转化能力。随着Fe3+含量的增加,PUTA/Fe复合薄膜的NIR光响应形状恢复率显著提高,形状恢复时间从60s减少到40s。PUTA/Fe复合薄膜的力学性能也得到了改善。重要的是,由于聚合物基质中动态的苯酚-氨基甲酸酯网络，PUTA/Fe复合膜可以通过拓扑重排重塑其永久形状，并显示出其良好的NIR光响应形状记忆性能。因此,具有高含量生物基材料（TA含量为15.1-19.4％）的PUTA/Fe复合材料表现出快速响应NIR光的形状记忆特性，因此，它将在新型智能材料的应用中具有巨大的潜力，包括高效和环保的智能光热响应器。本文受版权保护。保留所有权利。
