Improved interfacial shear strength of CF/PA6 and CF/epoxy composites by grafting graphene oxide onto carbon fiber surface with hyperbranched polyglycerol
Improved interfacial shear strength of CF/PA6 and CF/epoxy composites by grafting graphene oxide onto carbon fiber surface with hyperbranched polyglycerol
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通过用超支化聚甘油将氧化石墨烯接枝到碳纤维表面来提高CF/PA6和CF/环氧树脂复合材料的界面剪切强度
DOI：
10.1002/sia.6984
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发表时间：
2021-07
影响因子：
1.7
通讯作者：
Cong Gao
中科院分区：
文献类型：
--
作者：
Yingdan Zhu;Yunyun Ma;Chun Yan;Haibing Xu;Dong Liu;Gang Chen;Pengcheng Shi;Junfeng Hu;Cong Gao
碳纤维/聚合物复合材料的界面性质对碳纤维增强复合材料的性能具有重要影响。本文报道了一种利用超支化聚甘油(HPG)在CF表面接枝氧化石墨烯(GO)来调整界面性能的新方法，以提高CF/PA6和CF/EP复合材料的界面剪切强度(IFSS)和耐热性。以HPG为偶联剂，在碳纤维表面引入大量羟基，提高了GO的接枝量，提高了碳纤维的极性、润湿性和表面能。通过微粘结试验研究了复合材料在不同温度下的界面剪切强度。结果表明，在界面引入GO后，碳纤维增强尼龙6和环氧基复合材料的界面剪切强度分别提高了44%和30%以上。此外，GO改性的CF/EP1复合材料在85℃时的IFSS仅比25℃时降低9.1%，且当环境温度低于树脂熔点或玻璃化转变温度时，CF/PA6和CF/EP2复合材料的IFSS保持稳定。最后，对界面强化机理进行了进一步的分析。
The interfacial properties between carbon fiber (CF) and polymer matrix are critical to the performance of CF reinforced composites. Herein, we reported a new method of tailoring the interfacial properties by grafting graphene oxide (GO) onto the CF surface with hyperbranched polyglycerol (HPG), which could improve the interfacial shear strength (IFSS) and heat resistance of CF/PA6 and CF/epoxy (EP) composites. A large number of hydroxyl groups were introduced onto CF surface by using HPG as a new coupling agent, which improved the grafting amount of GO, the polarity, wettability and surface energy of CF. The IFSS of composites at different temperature was investigated by microbond test. The results showed that after introducing GO into the interface, the IFSS of CF reinforced PA6 and epoxy composites increased by 44% and more than 30%, respectively. Moreover, the IFSS of GO modified CF/EP1 composites at 85°C was only 9.1% lower than that at 25°C. In addition, the IFSS of the CF/PA6 and CF/EP2 composites could be kept stable when the ambient temperature was lower than the melting point or glass transition temperature of the resin matrix. Finally, the interfacial enhancement mechanism was further analyzed in details.
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影响因子：
10.9
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