CAJ | 학술논문

采用浓硫酸和硅烷偶联剂对碳纤维(CF)进行表面处理，利用可变纤维注入技术和反应注射成型技术相结合制备了聚氨酯(PUR)/CF泡沫复合材料，研究了CF表面处理及含量对复合材料力学性能的影响，并对破坏断口进行了扫描电镜观测。结果表明，CF表面处理可以有效提高PUR/CF泡沫复合材料的界面结合力，随着CF含量的增加，复合材料的拉伸强度、弯曲强度和冲击强度均呈先增加后下降的趋势，表面处理的CF质量分数为15%时，复合材料的拉伸强度、弯曲强度和冲击强度分别比纯PUR增加了1.52倍、2.73倍和2.25倍。
채용농류산화규완우련제대탄섬유(CF)진행표면처리，이용가변섬유주입기술화반응주사성형기술상결합제비료취안지(PUR)/CF포말복합재료，연구료CF표면처리급함량대복합재료역학성능적영향，병대파배단구진행료소묘전경관측。결과표명，CF표면처리가이유효제고PUR/CF포말복합재료적계면결합력，수착CF함량적증가，복합재료적랍신강도、만곡강도화충격강도균정선증가후하강적추세，표면처리적CF질량분수위15%시，복합재료적랍신강도、만곡강도화충격강도분별비순PUR증가료1.52배、2.73배화2.25배。
Polyurethane(PUR)/carbon fiber(CF) composites were prepared by varible fiber injection technology and reaction injection molding technology.The surface of CF was oxidized by concentrated sulfuric acid and was treated by silane coupling agent. The effects of carbon fiber content and surface treatment on mechanical properties of PUR/CF composites were studied,and the fracture microstructure of impact fracture specimens was observed with scanning electron microscope.The results show that surface treatment can improve the bonding and mechanical properties of PUR/CF composites efficiently.With the increase of CF content, the tensile strength,bending strength and impact strength of composites increase firstly and then decrease.When the content of CF is about 15%,and the tensile strength,bending strength and impact strength of composites increase 2.52 times,3.73 times and 3.25 times respectively,compared with those of pure PUR.