工艺与制造英文2023被引 12
不同浸渍喷嘴直径的酚醛浸胶连续碳纤维增强酚醛树脂复合材料的界面性能研究——基于3D打印工艺
Interfacial performance of phenolic‐sized continuous carbon fiber‐reinforced phenolic resin composites with different impregnation nozzle diameters via <scp>3D</scp> printing
Wencai Dong, Chonggao Bao, Rongzhen Liu, Shijia Li · Xi'an Jiaotong University
摘要整理
3D打印复合材料由于浸渍不充分导致界面结合强度较低。为改善3D打印复合材料的界面性能和力学性能，采用氧化结合浸胶处理对碳纤维（原始碳纤维）进行改性，得到浸胶碳纤维，通过原位固化3D打印工艺制备了连续碳纤维增强酚醛树脂复合材料（原始碳纤维/酚醛树脂和浸胶碳纤维/酚醛树脂）。浸渍喷嘴直径影响树脂含量和树脂对纤维束的浸渍效果。不同浸渍喷嘴直径的浸胶碳纤维/酚醛树脂复合材料的力学性能均优于原始碳纤维/酚醛树脂复合材料。当浸渍喷嘴直径为0.40 mm时，浸胶碳纤维/酚醛树脂复合材料的弯曲强度相比原始碳纤维/酚醛树脂复合材料提高了15.3%，层间剪切强度提高了28.6%。系统研究了纤维-树脂界面及界面性能对复合材料断裂模式的影响。界面性能的改善源于孔隙缺陷体积的减少和纤维-树脂界面浸渍均匀性的提高；断裂模式从原始碳纤维/酚醛树脂复合材料的长纤维拔出转变为浸胶碳纤维/酚醛树脂复合材料的短纤维拔出，这是由于界面性能的改善所致。
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