East China University of Qu Tai-fai \”Germany should\”: A self-healing polymers research progress in the field of supramolecular

The supramolecular polymer as a unique class of polymeric materials dynamic, high-performance elastomers, materials having self-repairing field wide application prospect. Recently, Professor of Chemistry and Molecular Engineering Qu Hui large East China University team In supramolecular self-healing polymers research areas of progress [ 123], the results related to the form of research papers published online in the international field of chemistry renowned German journal applied Chemistry Angew. Chem. Int. Ed. . In previous work, the research group to open up a new polymerization method can be a small molecule natural lipoic acid is converted into a high-performance polymeric material step ( Sci. Adv. 2018, 4, eaat8192 ; JACS , 2019, 141, 12804). Although such a polymeric material prepared without solvent polymerization process exhibits a high elongation and a quick self-healing properties, but it has a lower mechanical modulus (only 81KPa), which certainly limits its application in the field of high-performance materials. Meanwhile, high-strength elastomers often leads to low dynamic of the network, which limits the temperature self-repairing property. Thus, , design of both high strength and temperature properties of the self-repairing material is an elastomeric material such design challenge longstanding . The researchers found that, on the basis of the original system and method, the iron concentration to enhance the mole ratio of 1%, and to avoid the introduction of water molecules during the synthesis from the air, can significantly improve the mechanical modulus of the polymers (more than 60 times ), and good retention of the network dynamics, i.e., exhibits excellent room temperature ductility and mechanical properties of self-healing. Technique demonstrated by X-ray diffraction, scattering, etc., greatly enhance the mechanical strength due to the high concentration of the iron – carboxy complex formation of long range disorder cluster ions by unique strong Coulomb force polyethylene lipoic acid-free solvent polymerization network, i.e. further introducing two key crosslinking ion based on the original three kinds of dynamic chemically . The resulting polymeric network having a high Young\’s modulus (5.1 MPa) , High mechanical ductility (more than 65%) , chamberSelf-healing temperature (may be underwater) , can be reprocessed recovering and the like. As an extension of this groundbreaking work work upfront, lipoic acid to further promote the polymerization of the polymer to improve the self-repairing properties. The outcome to \”Toughening a Self-Healable Supramolecular Polymer by Ionic Cluster Enhanced Iron-Carboxylate Complexes\” was published in Angew. Chem. Int. Ed. . The work by the doctoral Deng Yuan Xin , Dr. Zhang Qi completed under the guidance of Professor Qu Tai-fai of , and has been Tian Academy of Sciences , Feilin Jia Academy of Sciences careful guidance. Related synchrotron radiation test has been the strong support of the Shanghai Synchrotron Radiation BL19U2 line station of Dr. Li Na. This work was supported by the National Natural Science Foundation of major projects, project funding of basic science centers, major science and technology in Shanghai and East China University of Zhangjiang tree Yubo focus on fostering program and other support. Article link: http://dx.doi.org/10.1002/anie.201913893