Preparation of Robust Aramid/Epoxy Composites through Enhancing the Interface Performance by Nanocoating Solution

Aramid fiber reinforced composites (AFRC) have attracted considerable attention because of its high strength and modulus. But the poor interface due to the smooth fiber surface and few active groups limits the application of the final composites. In this study, robust AFRC was achieved via dip-coati...

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Bibliographic Details
Published in:Fibers and polymers 2022, 23(4), , pp.1077-1088
Main Authors: Li, Ting, Wang, Zengxiao, Cao, Yutong, Hu, Zuming, Yu, Junrong, Wang, Yan
Format: Article
Language:English
Subjects:
Aramid fiber reinforced plastics
Aramid fibers
Chemistry
Chemistry and Materials Science
Dip coatings
Epichlorohydrin
Fiber composites
Fiber reinforced polymers
Flexural strength
High strength
Immersion coating
Interfacial bonding
Interfacial shear strength
Kevlar (trademark)
Mechanical properties
Phenylenediamine
Polymer Sciences
Shear strength
Shellac
Tensile strength
섬유공학
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Summary:Aramid fiber reinforced composites (AFRC) have attracted considerable attention because of its high strength and modulus. But the poor interface due to the smooth fiber surface and few active groups limits the application of the final composites. In this study, robust AFRC was achieved via dip-coating approach. Instead of Kevlar fiber, sulfone-functionalized poly( p -phthaloyl- p -phenylenediamine) (SPPTA) was served as precursor to prepare nanocoating solution. By further grafting epichlorohydrin (ECH) and Shellac (SLC), the functional coating solution was obtained. After modification, the roughness and the polarity of the fiber were considerably improved. The modified AF/epoxy composites showed excellent interfacial bonding and mechanical properties. For the sample grafted with SLC, the interfacial shear strength (IFSS) reached 43.7 MPa with a significant enhancement by 21.4 %; while the inter-laminar shear strength (ILSS) reached 48.6 MPa with a reinforcement of 45.9 %. The flexural strength and tensile strength were increased to 283 MPa and 831 MPa, indicating that the study provides an effective method to achieve high strength AFRC.
ISSN:1229-9197
1875-0052
DOI:10.1007/s12221-022-4414-7