活性碳纳米管制备及其碳纤维复合材料性能研究

发布时间：2018-03-24 09:51

本文选题：环氧化合物　切入点：碳纳米管　出处：《北京化工大学》2015年硕士论文

【摘要】：纤维复合材料相比于传统的金属材料,强度、模量更高而质量更轻,因而广泛的应用于航空航天、交通运输、风力发电和体育器材等领域。作为先进的各向异性材料,纤维复合材料的径向性能远低于轴向性能。碳纳米管(CNTs)的力学性能优异,通过在基体中引入碳纳米管可以有效改善纤维复合材料的径向性能。然而由于碳纳米管的表面张力和比表面积较大,易在基体中发生团聚从而限制了其优异性能的发挥。本文在多壁碳纳米管(MWCNTs)的氨基化改性基础之上,将其与三种不同的单官能度环氧化合物正丁基缩水甘油醚(BGE)、苄基缩水甘油醚(EP 692)和十二-十四烷基缩水甘油醚(AGE)反应制备得到了活性碳纳米管。FTIR, XPS, TGA等测试表明通过氨基与环氧基的反应可以将环氧化合物接枝到氨基化碳管的表面,从而可控的在基体树脂与碳管间引入了不同刚性结构的界面层。动态接触角测试发现接枝环氧化合物后,环氧树脂与碳纳米管薄膜的接触角变小,表现出了更好的浸润性。将活性碳管添加到基体树脂中并与T700碳纤维复合制备了单向复合材料。碳纳米管/环氧树脂复合材料的弯曲性能测试发现,活性碳纳米管对环氧树脂的弯曲性能提升更大。在添加量为0.5%时,氨基化碳管使体树脂的强度和模量分别提高了10.6%和22.5%,而活性碳纳米管则分别提高了22.9%和38.1%。对于T700碳纤维/环氧树脂复合材料,加入1Wt%的活性碳纳米管后,复合材料的层间剪切性能(ILSS)从79MPa最大提高到86.3MPa。
[Abstract]:Compared with traditional metal materials, fiber composites have higher strength, higher modulus and lighter mass, so they are widely used in the fields of aerospace, transportation, wind power generation and sports equipment, etc. As advanced anisotropic materials, fiber composites are widely used in the fields of aerospace, transportation, wind power generation and sports equipment. The radial properties of the fiber composites are much lower than those of the axial ones, and the mechanical properties of CNTsare excellent. The radial properties of fiber composites can be effectively improved by introducing carbon nanotubes into the matrix. However, due to the large surface tension and specific surface area of carbon nanotubes, It is easy to agglomerate in the matrix, which limits its excellent performance. In this paper, based on the amination modification of MWCNTsof multi-walled carbon nanotubes (MWCNTs), The reactive carbon nanotubes, FTIR, XPS, TGA, were prepared by the reaction of three monofunctional epoxides: Ding Ji glycidyl ether BGEN, benzyl glycidyl ether EP692) and dodecyl glycidyl ether (ages). Through the reaction of amino group with epoxy group, epoxy compound can be grafted onto the surface of amino carbon tube. Therefore, a controllable interface layer with different rigid structures was introduced between the matrix resin and the carbon tube. The dynamic contact angle test showed that the contact angle between epoxy resin and carbon nanotube film became smaller after grafting epoxy compound. The unidirectional composites were prepared by adding activated carbon tubes to matrix resin and compounding with T700 carbon fiber. The bending properties of carbon nanotubes / epoxy composites were tested. The flexural properties of activated carbon nanotubes to epoxy resin were improved even more. When the amount of active carbon nanotubes was 0.5, Aminated carbon tubes increased the strength and modulus of the resin by 10.6% and 22.5%, respectively, while activated carbon nanotubes increased by 22.9% and 38.1%, respectively. For T700 carbon fiber / epoxy composites, 1Wt% active carbon nanotubes were added. The interlaminar shear properties of the composites increased from 79MPa to 86.3 MPA.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ127.11;TB383.1

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