Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》
Abstract： Three high-performance continuous fibers PBO, Armos and Twaron were on-line modified by atmospheric air dielectric barrier discharge (DBD) plasma. Then the modified fibers were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), atomic force microscopy (AFM), measurements of single fiber tensile strength (SFTS) and interlaminar shear strength (ILSS) in terms of their surface chemical composition, morphology, roughness and tensile strength, as well as interfacial adhesion properties of fiber reinforced composites respectively. Results showed that the oxygen and nitrogen content, and the roughness of fiber surface after DBD plasma modification with PBO, Armos and Twaron were all increased, and the ILSS of their composites were enhanced by 18.6%, 10.2% and 24.8%, respectively. However, it is important to note that there were significant differences in the increment of oxygen and nitrogen content as well as the etching effect of the surface for the three modified fibers, which might be related to the difference of their molecular structures and thermal performances. Apparently, the atmospheric air dielectric barrier discharge (DBD) plasma treatment is proved to be an effective means to improve the surface performance of the fibers while no harm to their SFTS and thereby the ILSS of the composite composed of a resin with the three fibers may obviously be enhanced.
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