Park Soo-Jin, Seo Min-Kang, Ma Tae-Jun, Lee Douk-Rae
Advanced Materials Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusong, Taejon, 305-600, Korea (South).
J Colloid Interface Sci. 2002 Aug 1;252(1):249-55. doi: 10.1006/jcis.2002.8479.
In this work, the effects of chemical treatment on Kevlar 29 fibers have been studied in a composite system. The surface characteristics of Kevlar 29 fibers were characterized by pH, acid-base value, X-ray photoelectron spectroscopy (XPS), and FT-IR. The mechanical interfacial properties of the final composites were studied by interlaminar shear strength (ILSS), critical stress intensity factor (K(IC)), and specific fracture energy (G(IC)). Also, impact properties of the composites were investigated in the context of differentiating between initiation and propagation energies and ductile index (DI) along with maximum force and total energy. As a result, it was found that chemical treatment with phosphoric acid solution significantly affected the degree of adhesion at interfaces between fibers and resin matrix, resulting in improved mechanical interfacial strength in the composites. This was probably due to the presence of chemical polar groups on Kevlar surfaces, leading to an increment of interfacial binding force between fibers and matrix in a composite system.
在这项工作中，已在复合体系中研究了化学处理对凯夫拉29纤维的影响。通过pH值、酸碱值、X射线光电子能谱（XPS）和傅里叶变换红外光谱（FT-IR）对凯夫拉29纤维的表面特性进行了表征。通过层间剪切强度（ILSS）、临界应力强度因子（K(IC)）和比断裂能（G(IC)）研究了最终复合材料的机械界面性能。此外，还在区分引发能和传播能以及韧性指数（DI）以及最大力和总能量的背景下研究了复合材料的冲击性能。结果发现，用磷酸溶液进行化学处理显著影响了纤维与树脂基体之间界面的粘附程度，从而提高了复合材料的机械界面强度。这可能是由于凯夫拉表面存在化学极性基团，导致复合体系中纤维与基体之间的界面结合力增加。
