Shinohara Akira, Pan Chengjun, Guo Zhenfeng, Zhou Liyang, Liu Zhonghua, Du Lei, Yan Zhichao, Stadler Florian J, Wang Lei, Nakanishi Takashi
Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China.
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan, Shenzhen, 518060, China.
Angew Chem Int Ed Engl. 2019 Jul 8;58(28):9581-9585. doi: 10.1002/anie.201903148. Epub 2019 May 30.
The introduction of optoelectronic functions into viscoelastic polymers can yield highly sophisticated soft materials for biomedical devices and autonomous robotics. However, viscoelasticity and excellent optoelectronic properties are difficult to achieve because the presence of a large number of π-conjugated moieties drastically stiffens a polymer. Here, we report a variation of additive-free viscoelastic conjugated polymers (VE-CPs) at room temperature by using an intact π-conjugated backbone and bulky, yet flexible, alkyl side chains as "internal plasticizers." Some of these polymers exhibit gel- and elastomer-like rheological behaviors without cross-linking or entanglement. Furthermore, binary blends of these VE-CPs exhibit a never-seen-before dynamic miscibility with self-restorable and mechanically induced fluorescence color changes.
将光电功能引入粘弹性聚合物中，可以生产出用于生物医学设备和自主机器人的高度复杂的软材料。然而，由于大量π共轭部分的存在会使聚合物急剧变硬，因此很难实现粘弹性和优异的光电性能。在这里，我们报告了一种在室温下通过使用完整的π共轭主链和庞大但灵活的烷基侧链作为“内增塑剂”来制备无添加剂的粘弹性共轭聚合物（VE-CP）的方法。这些聚合物中的一些表现出类似凝胶和弹性体的流变行为，而无需交联或缠结。此外，这些VE-CP的二元共混物表现出前所未有的动态混溶性，并具有自我修复和机械诱导的荧光颜色变化。
