SiC纳米线/环氧树脂复合材料的力学性能研究
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摘要
通过先超声波振荡再浇注成型的方法制得了长径比不相同的SiC纳米线/环氧树脂复合材料。通过力学性能测试及X射线衍射仪,扫描电镜和透射电镜分析研究了SiC纳米线用量及其不同长径比对复合材料性能的影响。结果表明,不同长径比碳化硅纳米线/环氧树脂复合材料的拉伸性能和弯曲性能均优于纯环氧树脂。随着碳化硅纳米线用量增加,复合材料的拉伸和弯曲性能均呈现出先增大后减弱的趋势。长径比小的碳化硅纳米线分散性较好,具有更显著的增强效果,最大拉伸强度和弯曲强度比纯环氧树脂分别提高了61.4%和50.4%,比长径比大的复合材料提高了6.8%和7%。
The SiC nanowire with different aspect ratios/epoxy resin composites were prepared by ultrasonic wave oscillation and cast molding. The effects of SiC nanowire amount and aspect ratio on the properties of composites were investigated by mechanical properties test and X-ray diffractometry,scanning electron microscopy and transmission electron microscopy. The results showed that the tensile properties and flexural properties of SiC nanowire/epoxy composites with different aspect ratios were better than those of pure epoxy resins. The tensile properties and flexural properties of the composites showed a tendency to increase first and then decrease with the increasing of SiC nanowire amount. The SiC nanowires with small aspect ratio had better dispersibility and more significant reinforcing effect. The maximum tensile strength and flexural strength were 61.4% and 50.4% higher than those of pure epoxy resin and 6.8% and7% higher than those of composites with larger aspect ratio.
The SiC nanowire with different aspect ratios/epoxy resin composites were prepared by ultrasonic wave oscillation and cast molding. The effects of SiC nanowire amount and aspect ratio on the properties of composites were investigated by mechanical properties test and X-ray diffractometry,scanning electron microscopy and transmission electron microscopy. The results showed that the tensile properties and flexural properties of SiC nanowire/epoxy composites with different aspect ratios were better than those of pure epoxy resins. The tensile properties and flexural properties of the composites showed a tendency to increase first and then decrease with the increasing of SiC nanowire amount. The SiC nanowires with small aspect ratio had better dispersibility and more significant reinforcing effect. The maximum tensile strength and flexural strength were 61.4% and 50.4% higher than those of pure epoxy resin and 6.8% and7% higher than those of composites with larger aspect ratio.
引文
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[2]Dang Z M,Yuan J K,Zha J W,et al.Fundamentals,processes and applications of high-permittivity polymer-matrix composites[J].Prog.Mater.Sci.,2012,57(4):660-723.
[3]S Sprenger.Epoxy resin composites with surface-modified silicon dioxide nanoparticles:A review[J].Appl.Polym.Sci.,2013,130(3):1421-1428.
[4]Shin-Yi Yang,Wei-Ning Lin,Yuan-Li Huang,et al.Synergetic effects of graphene platelets and carbon nanotubes on the mechanical and thermal properties of epoxy composites[J].Carbon,2011,49(3):793-803.
[5]Long-Cheng Tang,Yan-Jun Wan,Dong Yan,et al.The effect of graphene dispersion on the mechanical properties of graphene/epoxy composites[J].Carbon,2013,60:16-27.
[6]Tran Huu Nam,Ken Goto,Yudai Yamaguchi,et al.Improving mechanical properties of high volume fraction aligned multi-walled carbon nanotube/epoxy composites by stretching and pressing[J].Compos.Part B-Eng.,2016,85B(2):15-23.
[7]Fuzhong Wang,Lawrence T Drzal,Yan Qin,et al.Mechanical properties and thermal conductivity of graphene nanoplatelet/epoxy composites[J].J.Mater.Sci.,2015,50(3):1082-1093.
[8]曾尤,王函.纳米炭/环氧树脂复合材料黏弹阻尼性能[J].科学通报,2014,59(33):3232-3239.
[9]Wong E W,Sheehan P E,Lieber CM.Nanobeam mechanics:elasticity,strength and toughness of nanorods and nanotubes[J].Science,1997,277(5334):1971-1975.
[10]Zhang Y F,Han X D,Zheng K,et al.Direct observation of superplasticity of beta-SiC nanowires at low temperature[J].Adv.Funct.Mater.,2007,17(17):3435-3440.
[11]W Yang,H Araki,C Tang,et al.Single-crystal SiC nanowires with a thin carbon coating for stronger and tougher ceramic composites[J].Adv.Mater.,2005,17(12):1519-1523.
[12]Hao Y J,Wagner J B,Su D S,et al.Beaded silicon carbide nanochains via carbothermal reduction of carbonaceous silica xerogel[J].Nanotechnology,2006,17(12):2870-2874.
[13]Shuai Meng,Guo-Qiang Jin,Ying-Yong Wang,et al.Tailoring and application of SiC nanowires in composites[J].Mater.Sci.Eng.A.,2010,527(21/22):5761-5765.
[14]Choi H J,Lee J G.Stacking faults in silicon carbide whiskers[J].Ceram.Int.,2000,26(1):7-12.