具有自修复功能的形状记忆聚酯的研究

Self-healing and shape memory capabilities of copper-coordination polyester

针对传统形状记忆聚合物在应用方面功能化单一这一缺陷,设计多功能型形状记忆聚合物体系是提高形状记忆聚合物智能性的主要方法。通过金属离子与高分子配位合成了具有较好形状记忆性能和高自修复能力的智能高分子材料。通过异烟酸功能聚酯中的氮原子与铜离子配位得到聚合物网络结构(Cu-PIE)。通过红外吸收光谱和紫外可见吸收光谱确定铜离子的配位结构,用原子吸收光谱(AAS)检测铜离子的吸收浓度。通过对Cu-PIE的含水量、分离时间等考察了Cu-PIE的自修复性能。结果发现,在45℃、含水量为5%、分离时间在10s以内的情况下,材料的自修复率可以达到90%以上。与传统形状记忆聚合物相比,具有自修复功能的形状记忆聚酯具有更好的应用前景。

The application of conventional shape memory polymers （SMP）is limited due to itssingle function.The design of mul-tifunctional SMP is a key method for improving the intelligence of SMP.In this study,a new and simple strategy was developed to fabricate a smart material with excellent shape memory and high self-healing capabilities through a metal ion coordinating poly-mer.A copper-coordination polymer network （Cu-PIE）was formed via thenitrogen of isonicotinate-functionalized polyesters （PIE）coordinating copper ions.The coordinated structure of Cu-PIE was confirmed by Fourier transform infrared spectroscopy （FTIT）and ultraviolet-visible spectroscopy（UV-vis）,and the absorbed copper ion concentrations were measured by atomic ab-sorption spectrometry.The self-healing properties of Cu-PIE were in vestigated through varying water content and different sepa-rate time of the cutted Cu-PIE.The results show that the self-healing efficiency of this material could be more than 90% at 45 ℃when the water content is 5% and the separate time was within 10 s.Compared with the conventional SMP,self-healing func-tional shape memory polyesters possessed better for prospects application.