表面处理芳纶纤维在丁羟橡胶中的应用

Application of Aramid Fiber Treated Insurface in Hydroxy Rubber Composite Materials

为改进芳纶纤维的表面光滑、化学惰性强、与橡胶黏结性能差等缺点,用硅烷偶联剂KH-550对其表面进行改性处理。用电子能谱仪(ESCA)和扫描电镜(SEM)对改性后的纤维和丁羟橡胶表面进行了测试,结果表明:C元素的含量明显下降,N和O元素的含量提高,纤维表面活性提高。制得芳纤/丁羟橡胶复合材料的拉伸强度由未处理的2.58 MPa提高到处理后的3.22 MPa。处理后,由SEM得到芳纶纤维丁羟橡胶复合材料表面的丁羟橡胶量增加。在KH-550的质量分数为5%、处理时间为5 h的条件下,芳纶纤维的处理效果最佳。

In order to improve the smooth surface and chemical inert of aramid fiber and poor adhesiveness of aramid fiber with hydroxy rubber materials, the surface of aramid fiber is modified with silicon coupling agent KH- 550. The change of fibers and hydroxy rubber in surface is determined by ESCA and SEM. The results show that the content of carbon element decreases and the contents of nitrogen and oxygen element increase. The activity of surface of fiber is increased. The tensile strength of aramid fiber/hydroxy rubber composite materials is increased from 2.58 MPa to 3.22 MPa. The weight of hydroxy rubber on surface of hydroxy rubber obtained by SEM is more than untreated fiber composite materials. Under the conditions of the content of KH-550 5% and treating time 5 hours, the treating effect on aramid fiber is best.