4.7 Article

Understanding interfacial interactions of polydopamine and glass fiber and their enhancement mechanisms in epoxy-based laminates

期刊

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2018.10.024

关键词

Glass fibers; Mechanical properties; Interface/interphase; Surface analysis

资金

  1. China Scholarship Council
  2. Longshan Academic Talent Research Supporting Program of SWUST, China [17LZX411]
  3. East Lake Scholars Sponsorship Program of WHSU, China

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Interfacial behavior greatly affects the bulk mechanical performance of fiber reinforced polymer laminates. In this study, polydopamine modified glass fiber was used to fabricate short glass fiber reinforced polymer (GFRP) laminates. The interactions between glass fiber and polydopamine were studied experimentally and theoretically by X-ray photoelectron spectroscopy (XPS) and density functional calculation respectively. Theoretical study clearly demonstrated that electronic interactions existed between polydopamine and glass fiber, indicating the hydrogen bonds/chemical interactions between them that were also demonstrated by XPS results. The enhanced interfacial interaction significantly benefited GFRP laminates, as demonstrated by various mechanical characterizations such as single fiber pull-out and Mode I interlaminar fracture toughness tests. Combining the theoretical and experimental studies indicated that polydopamine modification of glass fiber could be an easy and effective way to significantly improve the interfacial interactions between glass fiber and matrix and enhance the mechanical properties of GFRP laminates.

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