Self-Sensing Nanocomposites for Structural Applications: Choice Criteria

被引:10
作者
Guadagno, Liberata [1 ,2 ]
Lamberti, Patrizia [2 ,3 ]
Tucci, Vincenzo [2 ,3 ]
Vertuccio, Luigi [1 ,2 ]
机构
[1] Univ Salerno, Dept Ind Engn, Via Giovanni Paolo II, I-84084 Fisciano, Italy
[2] Univ Salerno, Res Ctr Nanomat & Nanotechnol, NANO MATES, Via Giovanni Paolo II 132, I-84084 Fisciano, Italy
[3] Univ Salerno, Dept Informat & Elect Engn & Appl Math, Via Giovanni Paolo II, I-84084 Fisciano, Italy
基金
欧盟地平线“2020”;
关键词
carbon nanoparticles; electrical percolation threshold; self-sensing; mechanical properties;
D O I
10.3390/nano11040833
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Epoxy resins containing multi-wall carbon nanotubes (MWCNTs) have proven to be suitable for manufacturing promising self-sensing materials to be applied in the automotive and aeronautic sectors. Different parameters concerning morphological and mechanical properties of the hosting matrices have been analyzed to choose the most suitable system for targeted applications. Two different epoxy precursors, the tetrafunctional tetraglycidyl methylene dianiline (TGMDA) and the bifunctional bisphenol A diglycidyl ether (DGEBA) have been considered. Both precursors have been hardened using the same hardener in stoichiometric conditions. The different functionality of the precursor strongly affects the crosslinking density and, as a direct consequence, the electrical and mechanical behavior. The properties exhibited by the two different formulations can be taken into account in order to make the most appropriate choice with respect to the sensing performance. For practical applications, the choice of one formulation rather than another can be performed on the basis of costs, sensitivity, processing conditions, and most of all, mechanical requirements and in-service conditions of the final product. The performed characterization shows that the nanocomposite based on the TGMDA precursor manifests better performance in applications where high values in the glass transition temperature and storage modulus are required.
引用
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页数:13
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