{"title":"具有多层能量耗散、增强链重排和溶剂再加工性的离子键调控交联聚氨酯","authors":"Qingyun Zhao, Linzhu Xu, Birong Zeng*, Yiting Xu, Weiang Luo, Conghui Yuan and Lizong Dai*, ","doi":"10.1021/acsmaterialslett.5c0031710.1021/acsmaterialslett.5c00317","DOIUrl":null,"url":null,"abstract":"<p >Highly cross-linked thermosetting polyurethanes based on covalent adaptable networks (CANs) have limitations in network rearrangement due to reduced polymer chain mobility. Herein, the strategy of multilevel dynamic nanodomains (<b>MDND</b>) based on ionic-bond regulation was proposed for constructing a series of ionic polyurethane (Ionic-PU) with high mechanical properties, self-healing and solvent reprocessing ability. Specifically, three ionic chain extenders were synthesized using mercaptopropionate (SH(CH<sub>2</sub>)<sub>2</sub>COO<sup>–</sup>) as the anion part and N-substituted 1,4-bis(imidazol-1-yl)-butane (<b>IC</b><sub><b>4</b></sub><b>I</b>) containing different carbon chain length in a pendant group as the cation part, which were then polymerized into the main chain. Ionic-PUs exhibited customizable mechanical properties and multilevel energy dissipation due to the steric hindrance, the magnitude of electrostatic force, and the type of noncovalent interaction on the construction of <b>MDND</b>. Ionic-PUs had enhanced chain rearrangement and even solvent reprocessing due to the fact that ionic bonds break and reorganize efficiently at elevated temperatures or in highly polar solvents.</p>","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 5","pages":"1984–1992 1984–1992"},"PeriodicalIF":9.6000,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ionic-Bond Regulated Cross-Linking Polyurethane with Multilevel Energy Dissipation, Enhanced Chain Rearrangement and Solvent Reprocessability\",\"authors\":\"Qingyun Zhao, Linzhu Xu, Birong Zeng*, Yiting Xu, Weiang Luo, Conghui Yuan and Lizong Dai*, \",\"doi\":\"10.1021/acsmaterialslett.5c0031710.1021/acsmaterialslett.5c00317\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Highly cross-linked thermosetting polyurethanes based on covalent adaptable networks (CANs) have limitations in network rearrangement due to reduced polymer chain mobility. Herein, the strategy of multilevel dynamic nanodomains (<b>MDND</b>) based on ionic-bond regulation was proposed for constructing a series of ionic polyurethane (Ionic-PU) with high mechanical properties, self-healing and solvent reprocessing ability. Specifically, three ionic chain extenders were synthesized using mercaptopropionate (SH(CH<sub>2</sub>)<sub>2</sub>COO<sup>–</sup>) as the anion part and N-substituted 1,4-bis(imidazol-1-yl)-butane (<b>IC</b><sub><b>4</b></sub><b>I</b>) containing different carbon chain length in a pendant group as the cation part, which were then polymerized into the main chain. Ionic-PUs exhibited customizable mechanical properties and multilevel energy dissipation due to the steric hindrance, the magnitude of electrostatic force, and the type of noncovalent interaction on the construction of <b>MDND</b>. Ionic-PUs had enhanced chain rearrangement and even solvent reprocessing due to the fact that ionic bonds break and reorganize efficiently at elevated temperatures or in highly polar solvents.</p>\",\"PeriodicalId\":19,\"journal\":{\"name\":\"ACS Materials Letters\",\"volume\":\"7 5\",\"pages\":\"1984–1992 1984–1992\"},\"PeriodicalIF\":9.6000,\"publicationDate\":\"2025-04-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Materials Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsmaterialslett.5c00317\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Materials Letters","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmaterialslett.5c00317","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Ionic-Bond Regulated Cross-Linking Polyurethane with Multilevel Energy Dissipation, Enhanced Chain Rearrangement and Solvent Reprocessability
Highly cross-linked thermosetting polyurethanes based on covalent adaptable networks (CANs) have limitations in network rearrangement due to reduced polymer chain mobility. Herein, the strategy of multilevel dynamic nanodomains (MDND) based on ionic-bond regulation was proposed for constructing a series of ionic polyurethane (Ionic-PU) with high mechanical properties, self-healing and solvent reprocessing ability. Specifically, three ionic chain extenders were synthesized using mercaptopropionate (SH(CH2)2COO–) as the anion part and N-substituted 1,4-bis(imidazol-1-yl)-butane (IC4I) containing different carbon chain length in a pendant group as the cation part, which were then polymerized into the main chain. Ionic-PUs exhibited customizable mechanical properties and multilevel energy dissipation due to the steric hindrance, the magnitude of electrostatic force, and the type of noncovalent interaction on the construction of MDND. Ionic-PUs had enhanced chain rearrangement and even solvent reprocessing due to the fact that ionic bonds break and reorganize efficiently at elevated temperatures or in highly polar solvents.
期刊介绍：
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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