摘要
为了探究合适的碳纤维表面处理方法,改善碳纤维-尼龙6织物复合材料界面结合效果,提高复合材料的力学性能,通过混编的方式制备碳纤维-尼龙6预制件,将预制件浸泡在不同浓度的醇溶尼龙无水乙醇溶液中,最后将预制件通过热压成型,制备碳纤维织物-尼龙6复合材料。采用万能拉伸试验机、SEM、TGA、DSC、XRD分析碳纤维-尼龙6复合材料的力学性能、微观形貌、耐热性能、结晶度及晶型变化。结果表明:将预制件在浓度为1wt%的尼龙溶液处理后,并采用1℃/min的降温速率制备的碳纤维-尼龙6织物复合材料力学性能最佳,抗拉强度、弹性模量、弯曲强度、弯曲模量、冲击强度分别为449.32 MPa、5.32GPa、657.67 MPa、44.08GPa、138.42kJ/m^2。纤维拔出后,单根碳纤维表面附着部分尼龙基体,碳纤维与尼龙基体形成了良好的界面层。碳纤维-尼龙6织物复合材料的起始分解温度较尼龙6纤维提高了13℃,耐热性有所增强,尼龙6树脂主要以α晶型存在,结晶较为完善。
To explore the suitable surface treatment method of carbon fiber and improve the interface bonding effect of carbon fiber fabric reinforced nylon 6composites,carbon fiber-nylon 6preforms were prepared by mixing braid,and the preform was socked in different concentrations of alcohol-soluble nylon anhydrous ethanol solution,and finally the carbon fiber fabric-nylon 6composite was prepared by hot pressing.The mechanical properties,microstructure,heat resistance,crystallinity and crystal form of the carbon fiber fabric-nylon 6composite were analyzed by universal tensile testing machine,SEM,TGA,DSC and XRD.The results indicate that when preforms are socked at 1wt%alcohol-soluble nylon anhydrous ethanol solution,the carbon fiber fabric-nylon 6composites have the best mechanical properties,the tensile strength,elastic modulus,bending strength,flexural modulus and impact strength are 449.32MPa,5.32GPa,657.67MPa,44.08GPa and 138.42kJ/m^2,respectively.After the fiber is pulled out,apart of the nylon matrix is adhered to the surface of the single carbon fiber,and the carbon fiber and the nylon matrix form a good interface layer.Compared with nylon 6fiber,the initial decomposition temperature of carbon fiber fabric-nylon 6composite material is increased by 13℃,and the heat resistance is enhanced.The nylon 6 resin mainly exists inαcrystal form,and the crystallization is perfect.
作者
张承启
彭小红
包海峰
ZHANG Chengqi;PENG Xiaohong;BAO Haifeng(School of Materials Science and Engineering,University of Wuhan Textile,Wuhan 430200,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2019年第11期2487-2494,共8页
Acta Materiae Compositae Sinica
基金
国家自然科学基金面上项目(21673167)
关键词
碳纤维
尼龙6
混编织物
表面处理
热压成型
复合材料
carbon fiber
nylon 6
mixed braid fabric
surface treatment
hot press forming
composites
