Lee J H, Rhee K Y, Park S J
Mechanical Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea.
J Nanosci Nanotechnol. 2011 Jan;11(1):275-80. doi: 10.1166/jnn.2011.3237.
We investigated the effects of carbon nanotube (CNT) functionalization with silanes and temperature on the tensile and fractural characteristics of CNT/epoxy nanocomposites. Three groups of nanocomposites were fabricated using unmodified, oxidized and silanized CNTs, each at 0.1 wt%. Tensile and fractural tests were performed using the three nanocomposite samples at -30 degrees C, 20 degrees C, and 45 degrees C. Results showed that the tensile strength of silanized samples at -30 degrees C was about 89% and 241% higher, respectively, than at 20 degrees C and 45 degrees C. The elastic modulus of silanized CNT nanocomposite at -30 degrees C was about 52% and 871% higher, respectively, than at 20 degrees C and 45 degrees C. The fracture toughness of silanized samples was higher than those of unmodified and oxidized samples at all temperatures. However, fracture toughness decreased with decreasing temperature. Specifically, fracture toughness of silanized nanocomposites at -30 degrees C was about 76% and 117% lower, respectively, than those at 20 degrees C and 45 degrees C.
我们研究了硅烷对碳纳米管（CNT）的功能化处理以及温度对CNT/环氧树脂纳米复合材料拉伸和断裂特性的影响。使用未改性、氧化和硅烷化的碳纳米管制备了三组纳米复合材料，每组的含量均为0.1 wt%。在-30℃、20℃和45℃下，对这三种纳米复合材料样品进行了拉伸和断裂测试。结果表明，硅烷化样品在-30℃时的拉伸强度分别比在20℃和45℃时高出约89%和241%。硅烷化CNT纳米复合材料在-30℃时的弹性模量分别比在20℃和45℃时高出约52%和871%。在所有温度下，硅烷化样品的断裂韧性均高于未改性和氧化样品。然而，断裂韧性随温度降低而降低。具体而言，硅烷化纳米复合材料在-30℃时的断裂韧性分别比在20℃和45℃时低约76%和117%。
