In order to improve the surface infiltration of carbon fiber reinforced plastic/polymer (CFRP) and improve the bonding strength, the CFRP bonding surface was pretreated by the normal temperature and pressure air plasma treatment method, the contact angle of CFRP under different pretreatment parameters was tested, the surface energy was calculated. By using atomic force microscope, Fourier infrared spectrometer and X-ray photoelectron spectrometer, the physical and chemical properties of CFRP surface were analyzed under different treatment parameters, and 4 kinds of adhesives were used to test the tensile shear strength of bonding joints. The results show that the distance between the nozzle and the CFRP surface is 6mm, the nozzle movement speed is 50 mm/s as the best treatment condition. After plasma treatment, the contact angle between CFRP and water is reduced from 114° to 23°, and the surface can be raised from 32.49mJ/m2 to 72.19mJ/m2. Plasma treatment enhances the epoxy functional groups on the surface of CFRP, reduces the surface roughness, forms a large number of micro-scale gullies on the surface. The use of plasma treatment significantly improves the tensile shear strength of epoxy adhesive joints, so that the failures such as the interface failure and the substrate damage decrease, but pull shear strength of polyurethane adhesive joints changes little. The failure form is transformed from the composite failure of the interfacial adhesive layer to pure interface failure.
LIU Xiaodong,WU Lei,KONG Liang,WANG Min,CHEN Yidong
. Effect of Surface and Adhesive-Bonded Properties of Carbon Fiber
Reinforced Plastic/Polymer and Atmosphere Plasma Processing[J]. Journal of Shanghai Jiaotong University, 2019
, 53(8)
: 971
-977
.
DOI: 10.16183/j.cnki.jsjtu.2019.08.012
［1］KELLY G. Joining of carbon fiber reinforced plastics for automotive applications［D］. Stockholm, Sweden: Royal Institute of Technology, 2004.
［2］CHE D, SAXENA I, HAN P, et al. Machining of carbon fiber reinforced plastics/polymers: A literature review［J］. Journal of Manufacturing Science and Engineering, 2014, 136(3): 034001-1-22.
［3］陈秋飞, 戴慧平, 郭鹏宗, 等. 表面处理工艺对碳纤维复合材料的 ILSS 及界面形貌的影响［J］. 玻璃钢/复合材料, 2016 (3): 60-64.
CHEN Qiufei, DAI Huiping, GUO Pengzong. The influence of surface treatment process on ILSS and interface morphology of carbon fiber/resin composites［J］. Fiber Reinforces Plastics/Composites, 2016 (3): 60-64.
［4］赵艳荣, 胡平, 梁继才, 等. 碳纤维复合材料在汽车工业中的应用 ［J］. 合成树脂及塑料, 2015, 32(5): 95-98.
ZHAO Yanrong, HU Ping, LIANG Jicai, et al. Application of carbon fiber composites in the automotive industry［J］. China Synthetic Resin and Plastics, 2015, 32(5): 95-98.
［5］竺铝涛. 汽车用碳纤维复合材料加工成型工艺研究进展［J］. 石油化工技术与经济, 2013, 29(1): 59-62.
ZHU Lütao. Advance of study on moulding process for automobile carbon fiber composite［J］. Technology & Economics in Petrochemicals, 2013, 29(1): 59-62.
［6］ZALDIVAR R J, KIM H I, STECKEL G L, et al. Surface preparation for adhesive bonding of polycyanurate-based fiber-reinforced composites using atmospheric plasma treatment［J］. Journal of Applied Polymer Science, 2011, 120(2): 921-931.
［7］American Society for Testing and Materials. Standard test method for apparent shear strength of single-lap-joint adhesively bonded metal specime by tension loading (metal-to-metal): ASTM D1002-2010［S］. USA: American Society for Testing and Materials, 2010.
［8］林建平, 王询, 杨晓军, 等. 常压空气等离子处理对铝合金胶接接头强度的影响 ［J］. 中国表面工程, 2017, 30(3): 48-57.
LIN Jianping, WANG Xun, YANG Xiaojun, et al. Effects of atmospheric pressure air plasma treatment on static strength of adhesive-bonded aluminum alloy ［J］. China Surface Engineering, 2017, 30(3): 48-57.
［9］ZALDI VAR R J, NOK ES J P, PATEL D N, et al. Effect of using oxygen, carbon dioxide, and carbon monoxide as active gases in the atmospheric plasma treatment of fiber-reinforced polycyanurate compo-sites［J］. Journal of Applied Polymer Science, 2012, 125(4): 2510-2520.
