周期性孪晶结构碳化硅纳米线改性环氧树脂的性能

发布时间：2018-07-22 16:23

【摘要】：通过超声分散和模具浇注成型法制备了周期性孪晶结构碳化硅(SiC)纳米线改性环氧树脂,探讨了SiC纳米线的周期性孪晶结构及含量对环氧树脂复合材料力学性能的影响。结果表明,周期性孪晶结构SiC纳米线的加入明显改善了环氧树脂基体的力学性能,孪晶结构有助于提高SiC纳米线与基体树脂之间的相互结合程度。随着孪晶SiC纳米线含量的增加,复合材料的拉伸性能和弯曲性能都呈现出先增加后减小的趋势。当SiC纳米线的含量为2%时,复合材料的拉伸强度、拉伸弹性模量、断裂伸长率、弯曲强度和弯曲弹性模量均达到最大值,相比于纯环氧树脂分别提高了90.6%,37.8%,38.3%,53.4%和24.5%。当SiC纳米线含量为3%时,弯曲应变达到最大值(6.72%),相比于环氧树脂提高了32.0%。
[Abstract]:Epoxy resin modified by silicon carbide (sic) nanowires with periodic twin structure was prepared by ultrasonic dispersion and mold casting. The effects of cyclic twin structure and content of sic nanowires on the mechanical properties of epoxy resin composites were investigated. The results show that the addition of sic nanowires with periodic twinning structure can obviously improve the mechanical properties of epoxy resin matrix, and the twin structure is helpful to improve the bonding degree between sic nanowires and matrix resins. With the increase of the content of twin sic nanowires, the tensile properties and bending properties of the composites show a tendency of first increasing and then decreasing. When the content of sic nanowires is 2, the tensile strength, elastic modulus, elongation at break, flexural strength and flexural modulus of the composite reach the maximum value, and the ratio of 38.33.3% and 53.4% higher than that of pure epoxy resin, respectively, compared with the pure epoxy resin, the tensile strength, tensile modulus, elongation at break, bending strength and flexural modulus of the composites are increased by 53.4% and 24.5%, respectively. When the content of sic nanowires is 3, the bending strain reaches the maximum value (6.72%), which is 32.0% higher than that of epoxy resin.
【作者单位】：渭南师范学院化学与材料学院;
【基金】：陕西省教育厅专项科研计划项目(16 JK1270) 渭南师范学院教育科学研究项目(2016 JYKX005)
【分类号】：TB332

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