Ionic-Bond Regulated Cross-Linking Polyurethane with Multilevel Energy Dissipation, Enhanced Chain Rearrangement and Solvent Reprocessability

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-04-21 DOI:10.1021/acsmaterialslett.5c0031710.1021/acsmaterialslett.5c00317

Qingyun Zhao, Linzhu Xu, Birong Zeng*, Yiting Xu, Weiang Luo, Conghui Yuan and Lizong Dai*,

{"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":"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.","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}

引用次数: 0

Abstract

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.

Abstract Image

查看原文本刊更多论文

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

基于共价自适应网络（can）的高交联热固性聚氨酯由于聚合物链迁移率降低，在网络重排方面存在局限性。在此基础上，提出了基于离子键调控的多层动态纳米畴（mnd）策略，以构建一系列具有高力学性能、自修复能力和溶剂再处理能力的离子聚氨酯（ionic- pu）。具体而言，以巯基丙酸盐（SH(CH2)2COO -）为阴离子部分，以含有不同碳链长度的悬垂基团n -取代1,4-双（咪唑-1-基）丁烷（IC4I）为阳离子部分合成了3种离子扩链剂，并将其聚合成主链。由于空间位阻、静电力的大小和非共价相互作用的类型对mnd结构的影响，离子- pu表现出可定制的力学性能和多层能量耗散。由于离子键在高温或高极性溶剂中有效地断裂和重组，离子- pu增强了链重排甚至溶剂再加工。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

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.