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Holey Reduced Graphene Oxide Scaffolded Heterocyclic Aramid Fibers with Enhanced Mechanical Performance

机译:Holey Reduced Graphene Oxide Scaffolded Heterocyclic Aramid Fibers with Enhanced Mechanical Performance

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摘要

Poly(p-phenylene-benzimidazole-terephthalamide) (PBIA) fibers, a kind ofheterocyclic aramid fibers, possess extraordinary mechanical properties andadvanced applications in aerospace, military protection, and other civilianareas. However, harsh application scenarios are putting forward even stringentrequirements for the mechanical performances and environmental compatibilityof PBIA fibers. Strengthening lateral interactions between polymer chainsare approachable methods but ongoing challenges to obtain PBIA fibers withhigh-performance. This work develops a novel holey reduced-graphene-oxide(HrGO)/PBIA composite fiber with a scaffolded structure, in which the HrGOplays a role of clamp to effectively band plentiful PBIA chains through thein-plane holes. A small amount of HrGO (0.075 wt%) is able to improve thetensile strength and Young’s modulus of HrGO/PBIA fibers by 11.5% and8.3%, respectively. The small amount of well dispersed HrGO improves thecrystallinity and serves as the topological constraint that enhances the lateralinteraction of the PBIA chains, which is unveiled by the wide-angle X-ray scatteringand the coarse-grained molecular dynamics simulations. In addition, thefavorable compatibility of HrGO/PBIA fibers in complex application scenariosis demonstrated by the dynamic and cyclic-loading measurements.

著录项

  • 来源
    《Advanced functional materials》 |2022年第42期|2200937.1-2200937.10|共10页
  • 作者单位

    Center of Nano ChemistryBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871, China Division of Graphene Fiber TechnologyBeijing Graphene Institute (BGI)Beijing 100095, China Advan;

    Center of Nano ChemistryBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871, China Division of Graphene Fiber TechnologyBeijing Graphene Institute (BGI)Beijing 100095, China;

    National Center for Nanoscience and TechnologyBeijing 100190, ChinaSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798, SingaporeDivision of Graphene Fiber TechnologyBeijing Graphene Institute (BGI)Beijing 100095, China Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100021, ChinaCenter of Nano ChemistryBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871, China Division of Graphene Fiber TechnologyBeijing Graphene Institute (BGI)Beijing 100095, China SchooSchool of Materials Science and EngineeringPeking UniversityBeijing 100871, ChinaDivision of Graphene Fiber TechnologyBeijing Graphene Institute (BGI)Beijing 100095, ChinaNational Center for Nanoscience and TechnologyBeijing 100190, China CAS Key Laboratory of Mechanical Behavior and Design of MaterialsDepartment of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230026, China;

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  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类
  • 关键词

    heterocyclic aramid fibers; holey graphene; lateral interactions; mechanical properties; scaffolded structures;

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