期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 21, 页码 10912-10919出版社
AMER CHEMICAL SOC
DOI: 10.1021/am4031054
关键词
magnetoelectric; piezoelectric; polymer composites; interface; multiferroic
资金
- FEDER through the COMPETE Program
- Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Project [PEST-C/FIS/UI607/2011, PTDC/CTM-NAN/112574/2009]
- FCT [SFRH/BD/ 45265/2008, SFRH/BD/70303/2010, SFRH/BDE/ 51542/2011]
- Erasmus Mundus-VECCEU program
- Matepro Optimizing Materials and Processes [NORTE-07-0124-FEDER-000037]
- Programa Operacional Regional do Norte (ON.2 0 Novo Norte), under the Quadro de Referencia Estrategico Nacional (QREN)
- Fundo Europeu de Desenvolvimento Regional (FEDER)
- COST Actions (European Scientific Network for Artificial Muscles, ESNAM) [MP1003]
- Composites of Inorganic Nanotubes and Polymers, (COINAPO) [MP0902]
- Basque Government for financial support under ACTIMAT Project (Etortek Program)
- Fundação para a Ciência e a Tecnologia [SFRH/BD/70303/2010, SFRH/BDE/51542/2011] Funding Source: FCT
The effect of the bonding layer type and piezoelectric layer thickness on the magnetoelectric (ME) response of layered poly(vinylidene fluoride) (PVDF)/epoxy/Vitrovac composites is reported. Three distinct epoxy types were tested, commercially known as M-Bond, Devcon, and Stycast. The main differences among them are their different mechanical characteristics, in particular the value of the Young modulus, and the coupling with the polymer and Vitrovac (Fe39Ni39Mo4Si6B12) layers of the laminate. The laminated composites prepared with M-Bond epoxy exhibit the highest ME coupling. Experimental results also show that the ME response increases with increasing PVDF thickness, the highest ME response of 53 V.cm(-1).Oe(-1) being obtained for a 110 mu m thick PVDF/M-Bond epoxy/Vitrovac laminate. The behavior of the ME laminates with increasing temperatures up to 90 degrees C shows a decrease of more than 80% in the ME response of the laminate, explained by the deteriorated coupling between the different layers. A two-dimensional numerical model of the ME laminate composite based on the finite element method was used to evaluate the experimental results. A comparison between numerical and experimental data allows us to select the appropriate epoxy and to optimize the piezoelectric PVDF layer width to maximize the induced magnetoelectric voltage. The obtained results show the critical role of the bonding layer and piezoelectric layer thickness in the ME performance of laminate composites.
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