Conformal formation of physically cross-linked dual-network hydrogels on porous surface for excellent electrochemical performance and self-healing behavior
{"title":"Conformal formation of physically cross-linked dual-network hydrogels on porous surface for excellent electrochemical performance and self-healing behavior","authors":"","doi":"10.1016/j.compositesb.2024.111733","DOIUrl":null,"url":null,"abstract":"<div><p>Despite significant advances in multilayer hybrid composite structures for exceptionally promising applications, controlling their chemisorption and growth on stationary platforms for excellent anti-corrosion and self-healing properties remains challenging. In this study, we coated porous MgO on magnesium substrate, and alginic acid sodium salt (ALG) with hydroxypropyl methylcellulose (HMC; layer-forming agent) and sodium calcium (CaCl<sub>2</sub>; self-healing agent), respectively, via a combination of interfacial plasma electrolysis (I-PE) and dip chemical coating (DCC). The HMC-ALG layer grew on the platform surface via robust physical and chemical bonds, affording HMC-ALG mats with two-dimensional morphologies. Polarization analysis and electrochemical impedance spectroscopy (EIS) measurements of HMC-ALG/MgO in a 3.5 wt% NaCl solution demonstrated its excellent electrochemical performance (inhibition efficiency of 98.79 %), due to the electron donor effect of the hydroxyl group and cross-linking behavior between ALG and CaCl<sub>2</sub>. This elucidates the anti-corrosive mechanism of the additional layer with chemically adsorbed Mg–O bonds on the inorganic layer. This dual-network hydrogel offers good self-healing abilities, with healing efficiencies reaching up to 86 % within 45 min, owing to robust hydrogen bonding and aggregation during stretching. These results highlight the promise of the hydroxyl group's electron donor effect and cross-linking behavior for enhancing electrochemical performances with self-healing ability.</p></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":null,"pages":null},"PeriodicalIF":12.7000,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Part B: Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359836824005456","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Despite significant advances in multilayer hybrid composite structures for exceptionally promising applications, controlling their chemisorption and growth on stationary platforms for excellent anti-corrosion and self-healing properties remains challenging. In this study, we coated porous MgO on magnesium substrate, and alginic acid sodium salt (ALG) with hydroxypropyl methylcellulose (HMC; layer-forming agent) and sodium calcium (CaCl2; self-healing agent), respectively, via a combination of interfacial plasma electrolysis (I-PE) and dip chemical coating (DCC). The HMC-ALG layer grew on the platform surface via robust physical and chemical bonds, affording HMC-ALG mats with two-dimensional morphologies. Polarization analysis and electrochemical impedance spectroscopy (EIS) measurements of HMC-ALG/MgO in a 3.5 wt% NaCl solution demonstrated its excellent electrochemical performance (inhibition efficiency of 98.79 %), due to the electron donor effect of the hydroxyl group and cross-linking behavior between ALG and CaCl2. This elucidates the anti-corrosive mechanism of the additional layer with chemically adsorbed Mg–O bonds on the inorganic layer. This dual-network hydrogel offers good self-healing abilities, with healing efficiencies reaching up to 86 % within 45 min, owing to robust hydrogen bonding and aggregation during stretching. These results highlight the promise of the hydroxyl group's electron donor effect and cross-linking behavior for enhancing electrochemical performances with self-healing ability.
期刊介绍:
Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development.
The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.