Effects of silane-modified carbon nanotubes on flexural and fracture behaviors of carbon nanotube-modified epoxy/basalt composites

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• 作者：M.T. Kim^a ; K.Y. Rhee^b ; ^{rheeky@khu.ac.kr} ; S.J. Park^c ; ^{sjpark@inha.ac.kr} ; D. Hui^b ; ^d
• 关键词：A. Polymer&ndash ; matrix composites ; B. Mechanical properties ; E. Surface treatments
• 刊名：Composites Part B ; Engineering
• 出版年：2012
• 期刊代码：18_13598368
• 类别：ms
• 出版时间：July, 2012
• 卷：43
• 期：5
• 页码：2298-2302
• 文件大小：930 K

摘要

We investigated the effects of carbon nanotube (CNT) modification with silane on the flexural and fracture behaviors of modified carbon nanotube epoxy/basalt (CNT/epoxy/basalt) composites. Flexural and mode I fracture tests were performed using acid-treated and silane-treated CNT/epoxy/basalt composites, respectively. FT-IR analysis was conducted to determine the chemical change on the surface of basalt fiber due to the silane modification. After the fracture tests, the fracture surfaces of the CNT/epoxy/basalt composites were examined with scanning electron microscopy (SEM) to investigate the fracture mechanisms of the CNT/epoxy/basalt composites, depending on the CNT modification. The results show that the flexural modulus and strength of silane-treated CNT/epoxy/basalt composites are 鈭?0%and 鈭?4%greater, respectively, than those of acid-treated CNT/epoxy/basalt composites. The fracture toughness G_Ic of silane-treated CNT/epoxy/basalt composites was 鈭?0%greater than that of acid-treated CNT/epoxy/basalt composites. SEM examination revealed that the improvement in the flexural and fracture properties of silane-treated CNT/epoxy/basalt composites occurred due to enhanced dispersion and interfacial interaction between the silane-modified CNTs and the epoxy.