Li Wenle, Lu Xiaocun, Diamond Jacob M, Shen Chengtian, Jiang Bo, Sun Shi, Moore Jeffrey S, Sottos Nancy R
School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China.
Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA.
Nat Commun. 2024 Mar 30;15(1):2771. doi: 10.1038/s41467-024-47175-x.
A method is developed for facile encapsulation of reactive organic bases with potential application for autonomous damage detection and self-healing polymers. Highly reactive chemicals such as bases and acids are challenging to encapsulate by traditional oil-water emulsion techniques due to unfavorable physical and chemical interactions. In this work, reactivity of the bases is temporarily masked with photo-removable protecting groups, and the resulting inactive payloads are encapsulated via an in situ emulsion-templated interfacial polymerization method. The encapsulated payloads are then activated to restore the organic bases via photo irradiation, either before or after being released from the core-shell carriers. The efficacy of the photo-activated capsules is demonstrated by a damage-triggered, pH-induced color change in polymeric coatings and by recovery of adhesive strength of a damaged interface. Given the wide range of potential photo-deprotection chemistries, this encapsulation scheme provides a simple but powerful method for storage and targeted delivery of a broad variety of reactive chemicals, promoting design of diverse autonomous functionalities in polymeric materials.
开发了一种用于轻松封装反应性有机碱的方法，该方法在自主损伤检测和自修复聚合物方面具有潜在应用。由于不利的物理和化学相互作用，诸如碱和酸之类的高反应性化学品难以通过传统的油水乳液技术进行封装。在这项工作中，碱的反应性被光可去除的保护基团暂时掩盖，然后通过原位乳液模板界面聚合法封装所得的无活性负载物。然后，在从核壳载体释放之前或之后，通过光照射激活封装的负载物以恢复有机碱。光活化胶囊的功效通过聚合物涂层中损伤触发的、pH诱导的颜色变化以及受损界面的粘合强度恢复得以证明。鉴于潜在的光脱保护化学种类繁多，这种封装方案为各种反应性化学品的储存和靶向递送提供了一种简单而强大的方法，促进了聚合物材料中各种自主功能的设计。
