{"title":"Synergistic toughening of epoxy resin by block ionomers and carbon nanofibers","authors":"","doi":"10.1016/j.engfracmech.2024.110584","DOIUrl":null,"url":null,"abstract":"<div><div>Epoxy has been widely used in practical applications because of its excellent properties such as high tensile strength, high stiffness, strong chemical stability and excellent thermal performance, however, the brittleness has limited its further potentials. In this work, ternary polymer composites have been prepared by incorporating acidified carbon nanofibers (CNFs) and sulfonated polystyrene-block-poly (ethylene-co-butylene)-block-polystyrene (SSEBS) into epoxy resin using solution processing method. The synergistic strengthening and toughening effects of the hybrid fillers have been explored using quasi-static mechanical tests and microscopic morphology characterization. The mechanical properties of the ternary composites have been optimized by varying the loading amount of SSEBS and CNFs. The results show that when the loading amounts of SSEBS and CNFs are 10 wt% and 0.75 wt%, respectively, the composites deliver the highest fracture toughness of 1.39 KJ/m<sup>2</sup>, which has been enhanced by a factor of 500 % as compared with pure epoxy while the tensile strength has been increased slightly without sacrificing its strength.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Engineering Fracture Mechanics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0013794424007471","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
Abstract
Epoxy has been widely used in practical applications because of its excellent properties such as high tensile strength, high stiffness, strong chemical stability and excellent thermal performance, however, the brittleness has limited its further potentials. In this work, ternary polymer composites have been prepared by incorporating acidified carbon nanofibers (CNFs) and sulfonated polystyrene-block-poly (ethylene-co-butylene)-block-polystyrene (SSEBS) into epoxy resin using solution processing method. The synergistic strengthening and toughening effects of the hybrid fillers have been explored using quasi-static mechanical tests and microscopic morphology characterization. The mechanical properties of the ternary composites have been optimized by varying the loading amount of SSEBS and CNFs. The results show that when the loading amounts of SSEBS and CNFs are 10 wt% and 0.75 wt%, respectively, the composites deliver the highest fracture toughness of 1.39 KJ/m2, which has been enhanced by a factor of 500 % as compared with pure epoxy while the tensile strength has been increased slightly without sacrificing its strength.
期刊介绍:
EFM covers a broad range of topics in fracture mechanics to be of interest and use to both researchers and practitioners. Contributions are welcome which address the fracture behavior of conventional engineering material systems as well as newly emerging material systems. Contributions on developments in the areas of mechanics and materials science strongly related to fracture mechanics are also welcome. Papers on fatigue are welcome if they treat the fatigue process using the methods of fracture mechanics.