The simplest peroxide, hydrogen peroxide (H2O2) was used to prepare the surface modified poly(p-phenylene terephthalaramide) (PPTA) fibers under the assistant of ultrasonic vibration. Fourier transform infrared spectroscopy (FTIR) spectra indicated the increase of the active polar groups on the surface of the fibers. X-ray photoelectron spectroscopy (XPS) analysis confirmed that more carboxyl groups and hydroxyl groups have been obtained after this treatment. Scanning electron microscope (SEM) showed that the surface roughness of the fibers has been improved accordingly. The interfacial properties of modified PPTA fiber/epoxy composites were investigated by the single fiber pull-out test (SFP). The results showed that the interfacial shear strength (IFSS) of PPTA/epoxy composites was remarkably improved by 42.14 % while the breaking strength was not affected appreciably. The modified fiber presented 26.9 % higher moisture regain compared with the original fiber. It proved to be an efficient method to make the surface modified PPTA fiber for the application of the advanced composites at a relatively low cost.

在超声振动的辅助下，使用最简单的过氧化物过氧化氢（H2O2）来制备表面改性的聚对苯二甲酰对苯二甲酰胺（PPTA）纤维。傅立叶变换红外光谱（FTIR）光谱表明纤维表面活性极性基团的增加。X射线光电子能谱（XPS）分析证实了该处理后获得了更多的羧基和羟基。扫描电子显微镜（SEM）表明，纤维的表面粗糙度得到了相应的改善。通过单纤维拉出试验（SFP）研究了改性PPTA纤维/环氧树脂复合材料的界面性能。结果表明，PPTA /环氧树脂复合材料的界面剪切强度（IFSS）显着提高了42。14％，而断裂强度没有受到明显的影响。与原始纤维相比，改性纤维的回潮率高26.9％。实践证明，这是一种以相对较低的成本生产用于高级复合材料的表面改性PPTA纤维的有效方法。