首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Enhanced surface free energy of polyimide fibers by alkali treatment and its interfacial adhesion behavior to epoxy resins
Authors:Guofeng Tian  Binbin Chen  Shengli Qi  Hongqing Niu  Enlin Han
Institution:1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China;2. Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou, China
Abstract:In this article, polyimide (PI) fibers were modified by alkali treatment, and PI fiber-reinforced epoxy composites were fabricated. The effects of different alkali treatment times on the surface properties of the PI fibers and the adhesion behaviors of PI fiber/epoxy composites were studied. The surface morphologies, chemical compositions, mechanical properties, and surface free energy of the PI fibers were characterized by atomic force microscopy, X-ray photoelectron spectroscopy, single-fiber tensile strength analysis, and dynamic contact angle analysis, respectively. The results show that alkali treatment plays an important role in the improvement of the surface free energy and the wettability of PI fibers. We also found that, after the 3 min, 30 °C, 20 wt% NaOH solution treatment, the fibers possessed good mechanical properties and surface activities, and the interlaminar shear strength of the composites increased to 64.52 MPa, indicating good interfacial adhesion properties.
Keywords:Polyimide fiber  composite  surface modification  surface free energy
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号