不同石墨烯基材料对复合材料热性能影响的对比研究

摘要石墨烯具有优异的热学、力学及电学性能。本毕业论文通过制备两种不同石墨烯基材料（GONPs和MGO）环氧树脂复合材料，对比研究了GONPs和MGO对DGEBA/EMI-2,4体系固化行为的影响，利用FTIR光谱、FE-SEM、WAXD和DSC分析分别对两种石墨烯基材料的表面化学性质、形貌结构及固化行为进行了表征，并发现采用混合法可制备均匀分散于基体中的GONPs和MGO环氧树脂复合材料，当GONPs和MGO的加入量达到3wt%时，仍未发生填料的团聚现象。在DGEBA/EMI-2,4体系初始固化阶段，GONPs对体系的影响为催化与阻碍两种作用相互竞争的关系；而MGO对体系的影响始终为阻碍作用占主导地位。在后固化阶段，不论GONPs还是MGO都表现为阻碍作用。对于后固化阶段的玻璃化转变，GONPs随含量的增加促进作用增强，而MGO随含量的增加对玻璃化转变随MGO含量增加阻碍作用有所波动。19250
关键词石墨纳米片多层氧化石墨烯环氧树脂固化行为
毕业论文设计说明书（论文）外文摘要
Title Comparative study of the effect of different GO-based nanomaterials on the thermal properties of composites
Abstract
Graphene has excellent thermal, mechanical and electrical properties. This article does research on the different effects of GONPs and MGO on the curing behavior of DGEBA/EMI-2,4 system by preparing two different graphene-based materials (GONPs and MGO)/epoxy composites. The surface chemistry, morphology and structure and curing behavior of the two graphene-based materials are characterized by using FTIR spectroscopy, FE-SEM, WAXD and DSC analysis. We found that both GONPs and MGO which were   prepared with the mixing method used in this work show a uniform dispersion in the matrix of epoxy and no significant restack of GONP or MGO were observed in matrix when the loading is up to 3wt%. At the initial curing stage of DGEBA/EMI-2,4 system, GONPs shows a seesaw struggle between the catalytic and the hindrance effect while MGO shows a state dominated by the hindrance effect. At the later curing stage, both GONPs and MGO show delayed curing processes. For the vitrification phenomenon, GONPs shows a continuously increasing promotion effect while MGO shows a nonlinear hindrance effect which fluctuates in the hindrance intensity.
Keywords   GONPs   MGO   epoxy   curing behavior
目   次
1 引言    1
1.1 石墨烯概况    1
1.2 石墨烯衍生物    2
1.3 石墨纳米片    3
1.4 石墨烯环氧树脂基复合材料    4
1.5 其它石墨烯聚合物基复合材料    6
1.6 论文工作内容、目的及意义    6
2 实验部分    7
2.1 材料    7
2.2 GONPs的制备    7
2.3 GONP/DGEBA/EMI-2,4和MGO/DGEBA/EMI-2,4混合物的制备    7
2.4 GONP/环氧树脂和MGO/环氧树脂复合材料的制备    8
2.5 表征    8
3 结果与讨论    9
3.1 GONPs和MGO的形态特征及GONPs环氧树脂和MGO环氧树脂复合材料的微观结构    9
3.2 不同层数的GO基纳米材料对DGEBA/EMI-2,4体系固化行为的影响    11
结论    23
致谢    24
参考文献    25
1 引言
目前，复合材料因其优异的综合性能正越来越受到人们广泛的关注。而这其中，聚合物复合材料又以其质轻、耐腐蚀、易加工等特点在众多复合材料中脱颖而出。然而，绝大多数聚合物复合材料的热导率极低，热性能也较差，这就阻碍了其推广应用。因此，如何提高聚合物复合材料的热性能（包括热导率、固化行为、热膨胀系数等）成为了目前材料科学家们研究的重要课题。其中，向聚合物中填充导热填料是一种有效提高复合材料热性能的方法，如BN、AlN、碳纳米管和石墨烯等。而这其中，又以石墨烯的热导率最高。因此，石墨烯基材料成为了近年来研究的热点。不同石墨烯基材料对复合材料热性能影响的对比研究:http://www.youerw.com/cailiao/lunwen_10545.html