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Surface modification of aramid fibers by amino functionalized silane grafting to improve interfacial property of aramid fibers reinforced composite
Author(s) -
Jia Chuyuan,
Zhang Runze,
Yuan Chengce,
Ma Zhenyu,
Du Yunzhe,
Liu Li,
Huang Yudong
Publication year - 2020
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.25519
Subject(s) - aramid , materials science , composite material , surface modification , ultimate tensile strength , wetting , composite number , scanning electron microscope , contact angle , fiber , epoxy , fourier transform infrared spectroscopy , grafting , chemical engineering , polymer , engineering
The 3‐aminopropyltriethoxysilane (APS) grafted aramid fibers were prepared by γ‐ray irradiation and chemical treatment to improve the interfacial properties between aramid fibers and epoxy matrix. The functionalization process of aramid fibers was investigated by scanning electron microscopy, X‐ray photoelectron spectroscopy, and Fourier transform infrared spectrum. After grafted with APS, the surface roughness of aramid fibers increased obviously, and the element content and composition of functional groups changed significantly in the modification process. Dynamic contact analysis indicated the wettability, and surface free energy of the fibers were greatly improved after the APS treatment. Monofilament pull‐out measurement showed that the interfacial shear strength of aramid fiber reinforced composite increased by 51.03%, from 36.33 to 54.87 MPa after the surface modification. Moreover, benefited from the appropriate radiation and the APS grafting, the functionalization process did not damage fiber tensile strength.