Effects of the polyurethane sizing agent on surface and its interfacial properties for the aramid fiber

doi:10.19936/j.cnki.2096-8000.20251028.004

Abstract

Abstract: Waterborne polyurethane (WPU) sizing agent was used to modify aramid fiber (AF) and improve the interfacial bonding properties for AF and thermoplastic polyurethane (TPU) resin. The structure, surface element composition and morphology of AF were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscopy. The results showed that WPU sizing agent was successfully coated on the AF surface. The effects of WPU content on the surface energy, interlaminar shear strength of aramid fibers and TPU were studied. It is found can improve the surface roughness and surface energy of fiber surface with various WPU content. When the content of WPU sizing agent is 0.8wt%, the surface energy of WPU-AF is increased by 28.91%, while the interlaminar shear strength is 32.7 MPa, increased by 37.9%.

Key words: polyurethane, aramid fiber, interfacial bonding, composites

CLC Number:

TB332

DENG Zhikang, ZHANG Peng, KONG Haijuan, YU Muhuo. Effects of the polyurethane sizing agent on surface and its interfacial properties for the aramid fiber[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(10): 22-27.

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