College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
Biomacromolecules. 2021 Jun 14;22(6):2768-2776. doi: 10.1021/acs.biomac.1c00465. Epub 2021 May 25.
Biomass bifunctional polyamide elastomers (BbPEs) were successfully prepared from dimer acid (DA), trimer acid (TA), and triethylenetetramine with shape memory and self-healing abilities. In the composition structure of BbPEs, vast hydrogen bonds formed among the amide bonds of different segments endowed the BbPEs with self-healing ability. At room temperature, the mechanical properties of BbPEs can be restored to 49% of the original condition after healing for 2 h. In addition, the physical and chemical cross-linking endowed the BbPE with preferable mechanical and shape memory properties. The tensile strength of the material is 4.4 ± 0.1 MPa, and the elongation at break reaches 1500 ± 2%. Under the recovery temperature of 60 °C, the shape memory recovery rate of 5 min can reach 95%. The recovery efficiency is 88.9%. This material can be utilized for many practical applications, such as intelligent electronic devices, bionic materials, and so on.
生物质双官能聚酰胺弹性体（BbPEs）由二聚酸（DA）、三聚酸（TA）和三亚乙基四胺成功制备，具有形状记忆和自修复能力。在 BbPEs 的组成结构中，不同链段之间的大量氢键赋予了 BbPEs 自修复能力。在室温下，经过 2 小时的愈合，BbPEs 的力学性能可以恢复到原始状态的 49%。此外，物理和化学交联赋予了 BbPE 更好的力学性能和形状记忆性能。材料的拉伸强度为 4.4±0.1 MPa，断裂伸长率达到 1500±2%。在 60°C 的回复温度下，5 分钟的形状记忆回复率可达 95%。回复效率为 88.9%。这种材料可用于许多实际应用，如智能电子设备、仿生材料等。
