{"title":"Impact of flax fibre kink-bands on local longitudinal mechanical properties and cell wall ultrastructure","authors":"Loren Morgillo , Camille Goudenhooft , Alessia Melelli , Sylvie Durand , Marwa Abida , Johnny Beaugrand , Alain Bourmaud","doi":"10.1016/j.compositesa.2025.108754","DOIUrl":null,"url":null,"abstract":"<div><div>Atomic Force Microscope (AFM) in mechanical mode, Raman and Second Harmonic Generation (SHG) microscopy were applied to explore the ultrastructure and nano-mechanical properties of kink-band regions in flax fibres. It is evidenced, that the longitudinal indentation modulus drastically drops (between −43 and −53%) in kink-band regions, mainly explained by pronounced changes in microfibrillar angle (MFA), from 0 to 6° to 19-21°. At contrary, Raman investigations demonstrate a conservation of biochemical composition, along with a decrease in local crystallinity (between 11 and 57%), contributing also to the mechanical loss in kink-band regions. These micro-scale investigations provide inedited findings about the kink-band features and specificities, especially in term of local properties.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"191 ","pages":"Article 108754"},"PeriodicalIF":8.1000,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Part A: Applied Science and Manufacturing","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359835X2500048X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MANUFACTURING","Score":null,"Total":0}
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Abstract
Atomic Force Microscope (AFM) in mechanical mode, Raman and Second Harmonic Generation (SHG) microscopy were applied to explore the ultrastructure and nano-mechanical properties of kink-band regions in flax fibres. It is evidenced, that the longitudinal indentation modulus drastically drops (between −43 and −53%) in kink-band regions, mainly explained by pronounced changes in microfibrillar angle (MFA), from 0 to 6° to 19-21°. At contrary, Raman investigations demonstrate a conservation of biochemical composition, along with a decrease in local crystallinity (between 11 and 57%), contributing also to the mechanical loss in kink-band regions. These micro-scale investigations provide inedited findings about the kink-band features and specificities, especially in term of local properties.
期刊介绍：
Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.
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