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Polymers 2018, 10(8), 820; https://doi.org/10.3390/polym10080820

Layer-by-Layer Self-Assembly Strategy for Surface Modification of Aramid Fibers to Enhance Interfacial Adhesion to Epoxy Resin

1
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
2
Accupath Medical (Jiaxing) Co., Ltd., Jiaxing 314000, China
3
School of Materials Engineer, Shanghai University of Engineer Science, Shanghai 201620, China
*
Authors to whom correspondence should be addressed.
Received: 9 July 2018 / Revised: 23 July 2018 / Accepted: 24 July 2018 / Published: 25 July 2018
(This article belongs to the Special Issue Surface Modification and Functional Coatings for Polymers)
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Abstract

In this work, the layer-by-layer self-assembly technology was used to modify aramid fibers (AFs) to improve the interfacial adhesion to epoxy matrix. By virtue of the facile layer-by-layer self-assembly technique, poly(l-3,4-Dihydroxyphenylalanine) (l-PDOPA) was successfully coated on the surface of AFs, leading to the formation of AFs with controllable layers (nL-AF). Then, a hydroxyl functionalized silane coupling agent (KH550) was grafted on the surface of l-PDOPA coated AFs. The properties such as microstructure and surface morphology of AFs before and after modification were characterized by FTIR, XPS and FE-SEM. The results confirmed that l-PDOPA and KH550 were successfully introduced into the surface of AFs by electrostatic adsorption. The interfacial properties of AFs reinforced epoxy resin composites before and after coating were characterized by interfacial shear strength (IFSS), interlaminar shear strength (ILSS) and FE-SEM, and the results show that the interfacial adhesion properties of the modified fiber/epoxy resin composites were greatly improved. View Full-Text
Keywords: aramid fibers; surface modification; l-PDOPA; interfacial adhesion; epoxy composites aramid fibers; surface modification; l-PDOPA; interfacial adhesion; epoxy composites
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Li, Z.; Liu, B.; Kong, H.; Yu, M.; Qin, M.; Teng, C. Layer-by-Layer Self-Assembly Strategy for Surface Modification of Aramid Fibers to Enhance Interfacial Adhesion to Epoxy Resin. Polymers 2018, 10, 820.

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