Feng Jianshun, Kong Guoqiang, Shao Meng, Yu Qiubing, Yu Guang, Ren Xin, Yuan Wenjie, Liu Wenbo, Wang Xinyu, Wang Kang, Li Dayong, Di Chengrui, Zhu Bo
Key Laboratory for Liquid Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
Shandong Institute of Nonmetallic Materials, Jinan 250031, China.
Materials (Basel). 2024 Sep 19;17(18):4594. doi: 10.3390/ma17184594.
In this study, vinyltriethoxysilane (TEVS) was introduced onto the surface of carbon fiber using liquid-phase oxidation and impregnation methods to incorporate vinyl groups onto the carbon fiber, thereby enhancing the chemical bonding between the carbon fiber and norbornene-polyimide (PI-NA). Through a systematic study of the hydrolysis conditions and concentration of the TEVS solution, the optimal modification conditions were determined. These conditions were used to graft TEVS onto the surface of oxidized carbon fiber to prepare carbon-fiber-reinforced PI-NA composites (CF/PI-NA). The results show that when carbon fiber was treated with a 0.4 wt% TEVS solution, the interlaminar shear strength (ILSS) of the composites reached 65.12 MPa, and the interfacial shear strength (IFSS) reached 88.58 MPa, representing increases of 27.58% and 35.62%, respectively, compared to the CF/PI-NA composite materials prepared from untreated carbon fiber. It is worth noting that the modification method described in the study is simple and easy to implement, and it has the potential for large-scale continuous production applications.
在本研究中，采用液相氧化和浸渍法将乙烯基三乙氧基硅烷（TEVS）引入碳纤维表面，使碳纤维引入乙烯基，从而增强碳纤维与降冰片烯-聚酰亚胺（PI-NA）之间的化学键合。通过对TEVS溶液水解条件和浓度的系统研究，确定了最佳改性条件。利用这些条件将TEVS接枝到氧化碳纤维表面，制备了碳纤维增强PI-NA复合材料（CF/PI-NA）。结果表明，当用0.4 wt%的TEVS溶液处理碳纤维时，复合材料的层间剪切强度（ILSS）达到65.12 MPa，界面剪切强度（IFSS）达到88.58 MPa，与由未处理碳纤维制备的CF/PI-NA复合材料相比，分别提高了27.58%和35.62%。值得注意的是，该研究中描述的改性方法简单易行，具有大规模连续生产应用的潜力。
