Room-temperature self-healing glassy polymer

室温自修复玻璃状聚合物

• 批准号: 22KJ0971
• 负责人: 王 豪
• 金额: $ 1.09万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2023
• 资助国家: 日本
• 起止时间: 2023-03-08 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22KJ0971/
• 关键词: self-healing; glassy polymers; dynamic covalent bonds; thiourea

My research focuses on developing room-temperature self-healing glassy polymers. In 2018, we reported a groundbreaking discovery of poly(ether-thiourea) TUEG3 as the first room-temperature self-healable glassy polymer (Yanagisawa et al., Science 2018, 357, 72). This polymer possesses a large number of nonlinear zigzag arrays of H-bonded thiourea units, rendering it non-crystalline but amorphous over a wide temperature range. Remarkably, it exhibits self-healing behavior even at a low temperature of 12 °C, which is significantly below its glass transition temperature (Tg) of 27 °C.This pioneering work challenged the preconception that mechanically robust polymers cannot self-heal at ambient temperatures. Although there have been some recent reports of other room-temperature self-healable glassy polymers, the successful examples are still limited. In my research, I have developed a new room-temperature self-healable glassy polymer with repeating monomeric units that consist not only of a thiourea group but also a disulfide group, which can be reversibly cleaved off to provide the polymer with dynamic healing properties.Overall, my research contributes to the growing field of self-healing materials and opens up new possibilities for the development of advanced polymer materials with enhanced mechanical properties and extended functional lifetimes.

我的研究重点是开发室温自愈合玻璃聚合物。2018年，我们报告了一项突破性的发现，即聚(醚-硫脲)TUEG3是第一种室温自愈玻璃聚合物(Yanagisawa等人，Science 2018,357，72)。这种聚合物具有大量的氢键硫脲单元的非线性锯齿形阵列，使其在很宽的温度范围内呈非晶态。值得注意的是，即使在12°C的低温下，它也表现出自愈合行为，这明显低于其27°C的玻璃化转变温度(Tg)。这项开创性的工作挑战了机械坚固的聚合物在常温下不能自愈合的先入为主的观念。尽管最近也有一些其他室温自愈玻璃聚合物的报道，但成功的例子仍然有限。在我的研究中，我开发了一种新型的室温自愈合玻璃聚合物，它具有重复的单体单元，不仅由硫脲基团组成，还包括二硫键基团，这些基团可以可逆地裂解，为聚合物提供动态愈合性能。总体而言，我的研究为自愈合材料日益增长的领域做出了贡献，并为开发具有增强机械性能和延长功能寿命的先进聚合物材料开辟了新的可能性。