Lu Chunrui, Qiu Si, Lu Xue, Wang Jian, Xiao Lin, Zheng Ting, Wang Xiaodong, Zhang Dongxing
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
School of Chemistry and Materials Engineering, Huizhou university, Huizhou 516007, China.
Polymers (Basel). 2019 Apr 28;11(5):753. doi: 10.3390/polym11050753.
As a promising alternative to traditional prepreg, carbon fiber/poly(ether ether ketone) (CF/PEEK) hybrid composites have attracted wide public interest for their flexibility and conformability. However, modification methods focused on the hybrid premix have not been previously studied. In the present work, the interfacial strength of the hybrid composite was improved by treating the carbon and PEEK fibers together in a radiofrequency (RF) plasma containing one of the following gases to achieve surface activation: air, Ar, or Ar-air. After plasma treatment, the increased roughness of CF and the grafted chemical groups of CFs and PEEK fibers were propitious to the mechanical interlocking and interfacial strength. Significant interfacial shear strength (IFSS) enhancement was achieved after Ar 1 min, air 1 min plasma treatment. This study offers an alternative method for improving the interfacial properties of CF/PEEK composites by focusing on the boundary layer and modifying and controlling the fiber-matrix interface.
作为传统预浸料的一种有前途的替代品，碳纤维/聚醚醚酮（CF/PEEK）混杂复合材料因其柔韧性和贴合性而引起了广泛的公众关注。然而，此前尚未对专注于混杂预混料的改性方法进行研究。在本工作中，通过在含有以下气体之一的射频（RF）等离子体中对碳纤维和聚醚醚酮纤维进行共同处理以实现表面活化，从而提高了混杂复合材料的界面强度：空气、氩气或氩气 - 空气。等离子体处理后，碳纤维粗糙度的增加以及碳纤维和聚醚醚酮纤维上接枝的化学基团有利于机械联锁和界面强度。在氩气处理1分钟、空气处理1分钟的等离子体处理后，显著提高了界面剪切强度（IFSS）。本研究通过关注边界层并改性和控制纤维 - 基体界面，提供了一种改善CF/PEEK复合材料界面性能的替代方法。
