{"title":"A strong and tough hydroxyapatite-based fiber with enamel-inspired hierarchical structure","authors":"Baosen Ding, Shaojia Liu, Junfeng Lu, Yiran Guo, Tian Zheng, Hewei Zhao, Lin Guo","doi":"10.1007/s40843-024-2902-y","DOIUrl":null,"url":null,"abstract":"<p>The hierarchical structure of tooth enamel can inspire the preparation of high strength and high toughness biomimetic composites, but fully mimicking the entire hierarchy of tooth enamel is still challenging. Here, we show that synthetic hydroxyapatite (HAP) microbundles containing a long range of ordered crystalline/amorphous HAP nanowires can be spun into enamel-inspired high-performance macroscopic fiber through shear-induced assembly. The highly ordered nanowire-microbundle structure as well as the strong interfacial connection between HAP nanowires, HAP microbundles, and the polymer matrix, leads to a hierarchical energy dissipation route, which enables this enamel-inspired fiber with a high strength and toughness of 196.3 MPa and 46.3 MJ m<sup>−3</sup>, exceeding the fracture toughness of previously reported HAP-based hybrid fibers. This hierarchical enamel-inspired design strategy provides a new sight into the development of high strength and high toughness fibers for potential engineering and bio-repair applications.\n</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":6.8000,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40843-024-2902-y","RegionNum":2,"RegionCategory":"材料科学","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
The hierarchical structure of tooth enamel can inspire the preparation of high strength and high toughness biomimetic composites, but fully mimicking the entire hierarchy of tooth enamel is still challenging. Here, we show that synthetic hydroxyapatite (HAP) microbundles containing a long range of ordered crystalline/amorphous HAP nanowires can be spun into enamel-inspired high-performance macroscopic fiber through shear-induced assembly. The highly ordered nanowire-microbundle structure as well as the strong interfacial connection between HAP nanowires, HAP microbundles, and the polymer matrix, leads to a hierarchical energy dissipation route, which enables this enamel-inspired fiber with a high strength and toughness of 196.3 MPa and 46.3 MJ m−3, exceeding the fracture toughness of previously reported HAP-based hybrid fibers. This hierarchical enamel-inspired design strategy provides a new sight into the development of high strength and high toughness fibers for potential engineering and bio-repair applications.
期刊介绍:
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.