文献类型：期刊文献

英文题名：Mechanically interlocked [c2]daisy chain backbone enabling advanced shape-memory polymeric materials

作者：Zhou, Shang-Wu[1,2];Zhou, Danlei[1,2];Gu, Ruirui[1,2];Ma, Chang-Shun[1,2];Yu, Chengyuan[1,2];Qu, Da-Hui[1,2]

机构：[1]East China Univ Sci & Technol, Inst Fine Chem, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Adv Mat,Feringa Nobel Prize Scientist Join, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Frontiers Sci Ctr Materiobiol & Dynam Chem, Joint Int Res Lab Precis Chem & Mol Engn,Feringa N, Shanghai 200237, Peoples R China

年份：2024

卷号：15

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001177163800015)】；

基金：This work was supported by the National Natural Science Foundation of China (grant No. 22025503, 22205064, 22220102004), Shanghai Municipal Science and Technology Major Project (grant No. 2018SHZDZX03), the Fundamental Research Funds for the Central Universities, the Programme of Introducing Talents of Discipline to Universities (grant No. B16017), Science and Technology Commission of Shanghai Municipality (grant No. 21JC1401700), the Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study (grant No. SN-ZJU-SIAS-006), Shanghai Pujiang Program (grant No. 22PJ1402200), the Innovation Program of the Shanghai Municipal Education Commission (2023ZKZD40).

语种：英文

摘要：The incorporation of mechanically interlocked structures into polymer backbones has been shown to confer remarkable functionalities to materials. In this work, a [c2]daisy chain unit based on dibenzo-24-crown-8 is covalently embedded into the backbone of a polymer network, resulting in a synthetic material possessing remarkable shape-memory properties under thermal control. By decoupling the molecular structure into three control groups, we demonstrate the essential role of the [c2]daisy chain crosslinks in driving the shape memory function. The mechanically interlocked topology is found to be an essential element for the increase of glass transition temperature and consequent gain of shape memory function. The supramolecular host-guest interactions within the [c2]daisy chain topology not only ensure robust mechanical strength and good network stability of the polymer, but also impart the shape memory polymer with remarkable shape recovery properties and fatigue resistance ability. The incorporation of the [c2]daisy chain unit as a building block has the potential to lay the groundwork for the development of a wide range of shape-memory polymer materials.