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首页> 外文期刊>Journal of Applied Polymer Science >Effect of polyurethane sizing on carbon fibers surface and interfacial adhesion of fiber/polyamide 6 composites
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Effect of polyurethane sizing on carbon fibers surface and interfacial adhesion of fiber/polyamide 6 composites

机译：聚氨酯施胶对碳纤维表面的影响和纤维/聚酰胺6复合材料的界面粘附

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摘要

Commercial epoxy sized carbon fibers (CFs) or unsized CFs have poor interfacial adhesion with polyamide 6 (PA6). Here, CFs are coated with polyurethane (PU) and their surface properties in terms of surface chemistry, contact angle, roughness, and morphology, are investigated. The results of Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy demonstrate PU sizing evidently increases the quantity of polar functional groups on the CFs surface. The surface energy of the PU sized fiber is calculated according to the Owens-Wendt method. Compared with unsized fibers, the contact angle of PU sized fibers is decreased while their total surface energy is increased, indicating superior wettability. Moreover, transverse fiber bundle tests are performed to determine the interfacial adhesion between the CFs and PA6 matrix. The transverse fiber bundle strength of unsized CF is measured to be 12.57 MPa. For PU sized CFs processed with sizing concentration of 1.2%, this value is increased to 24.35 MPa, showing an increase of more than 90%. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46111.
机译：商业环氧尺寸碳纤维（CFS）或未定义的CFS与聚酰胺6（PA6）具有差的界面粘附性。这里，研究CFS涂有聚氨酯（PU），并在表面化学方面，接触角，粗糙度和形态学的表面性质进行研究。傅里叶变换红外光谱，X射线光电子能谱，扫描电子显微镜和原子力显微镜的结果证明PU施加明显增加了CFS表面上极性官能团的量。根据欧文斯Wendt方法计算PU尺寸光纤的表面能。与未定义的纤维相比，PU大小纤维的接触角在其总表面能增加时降低，表明优越的润湿性。此外，进行横向纤维束测试以确定CFS和PA6矩阵之间的界面粘附。未调整CF的横向纤维束强度测量为12.57MPa。对于施胶浓度为1.2％的PU大小的CFS，该值增加到24.35MPa，显示出超过90％。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46111。

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