Abstract A new method for functionalizing the surface of aramid fibers by hydrochloric acid is proposed, and new polyethylene glycol (PEG) coatings are prepared on the surface of the fibers by the reconstruction of hydrogen bonds for improving the bond strength with the resins. The structure and morphology of the aramid fibers are characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction instrument, atomic force microscopy, and scanning electron microscopy. Single fiber tensile test and interlaminar shear strength test are carried out to evaluate the mechanical properties of the modified fibers. The results show that the fibers are functionalized after hydrochloric acid treatment. The amino-groups and carbonyl of the aramid fibers are released while both carboxyl and amine groups are produced. In addition, it is also proved that polyethylene glycol has successfully coated the fiber surface, which improves the surface roughness and polarity of the fibers. As a result, the interlaminar shear strength increases by 51.68 %, while the tensile strength of the fibers decreases by 19.61 %.

中文翻译：

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通过氢键的重建在纤维表面制备PEG涂层以提高纤维和树脂的界面强度的简便方法

摘要 提出了一种盐酸功能化芳纶纤维表面的新方法，通过氢键的重构在纤维表面制备了新型聚乙二醇(PEG)涂层，以提高与树脂的结合强度。通过傅里叶变换红外光谱、X射线光电子能谱、X射线衍射仪、原子力显微镜和扫描电子显微镜对芳纶纤维的结构和形貌进行表征。进行单纤维拉伸试验和层间剪切强度试验以评价改性纤维的力学性能。结果表明，纤维在盐酸处理后被功能化。芳纶纤维的氨基和羰基被释放，同时产生羧基和胺基。此外，还证明聚乙二醇成功地包覆了纤维表面，改善了纤维的表面粗糙度和极性。结果，层间剪切强度增加了 51.68%，而纤维的拉伸强度下降了 19.61%。