Improving the interfacial property of carbon fiber/PI resin composite by grafting modification of carbon fiber surface
Improving the interfacial property of carbon fiber/PI resin composite by grafting modification of carbon fiber surface
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DOI：
10.1002/sia.6439
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发表时间：
2018-06
影响因子：
1.7
通讯作者：
Peng Chun-zheng
中科院分区：
文献类型：
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作者：
Peng Chun-zheng
碳纤维（CF）与聚酰亚胺（PI）树脂间的界面结合力差，严重制约了CF/PI复合材料的应用。在这项工作中，有效地提高界面粘合力的CF表面接枝。对改性炭纤维的表面形貌和表面组成进行了表征，表明丙烯酰胺成功地接枝到了炭纤维表面，表面粗糙度略有增加。接枝改性后的碳纤维/PI复合材料的界面剪切强度提高了86.96%，由于界面上的共价键和上浆剂的增韧作用，复合材料的层间剪切强度提高了55.61%。此外，还测试了不同界面结合强度的复合材料的力学性能，进一步证实了接枝改性的效果。
The poor interfacial adhesion between carbon fibers (CFs) and polyimide (PI) resin has seriously hampered the application of CF/PI composites. In this work, the interfacial adhesion was efficiently enhanced by grafting on the CF surface. Surface morphology and surface composition of modified carbon fibers were characterized, which indicated that acrylamide was grafted successfully on the CF surface and the surface roughness was increased slightly. After grafting, the interface shear strength of modified carbon fibers/PI composites was significantly improved by 86.96%, and the interlaminar shear strength was enhanced by 55.61% due to the covalent bonds in interphase and the toughening effect of sizing agent. Moreover, the mechanical properties of composites with different interfacial adhesion were measured, which further confirmed the effect of the grafting modification.