Mechanical, electrical and microstructural characterisation of multifunctional structural power composites
Mechanical, electrical and microstructural characterisation of multifunctional structural power composites
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DOI：
10.1177/0021998314554125
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发表时间：
2015-06-01
影响因子：
2.9
通讯作者：
Wienrich, M.
中科院分区：
文献类型：
--
作者：
Greenhalgh, E. S.;Ankersen, J.;Wienrich, M.
多功能复合材料，可以履行一个系统中的一个以上的角色，吸引了相当大的兴趣。这项工作的重点是结构超级电容器，同时携带机械负载，同时存储/输送电能。对两种单功能材料和四种多功能材料的临界力学性能（面内剪切和面内压缩性能）进行了表征，揭示了这些性能、微观结构和断裂过程之间的关系。增强材料包括基线T300织物，然后用碳纳米管接枝或上浆，而基线基质是MTM 57，其与离子液体和锂盐（两种浓度）共混以注入多功能性。所得到的复合材料表现出高度的基体异质性，与离子液体相优先形成的纤维，导致差的矩阵为主的性能。然而，以纤维为主的性能并没有受到抑制。因此，证明了这些材料现在可以在适度负载下提供优于常规单官能系统的重量减轻。
Multifunctional composites which can fulfil more than one role within a system have attracted considerable interest. This work focusses on structural supercapacitors which simultaneously carry mechanical load whilst storing/delivering electrical energy. Critical mechanical properties (in-plane shear and in-plane compression performance) of two monofunctional and four multifunctional materials were characterised, which gave an insight into the relationships between these properties, the microstructures and fracture processes. The reinforcements included baseline T300 fabric, which was then either grafted or sized with carbon nanotubes, whilst the baseline matrix was MTM57, which was blended with ionic liquid and lithium salt (two concentrations) to imbue multifunctionality. The resulting composites exhibited a high degree of matrix heterogeneity, with the ionic liquid phase preferentially forming at the fibres, resulting in poor matrix-dominated properties. However, fibre-dominated properties were not depressed. Thus, it was demonstrated that these materials can now offer weight savings over conventional monofunctional systems when under modest loading.