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    Highly Magneto-Responsive Elastomeric Films Created by a Two-Step Fabrication Process

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    Type
    Article
    Authors
    Marchi, Sophie
    Casu, Alberto
    Bertora, Franco
    Athanassiou, Athanassia
    Fragouli, Despina
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2015-08-24
    Online Publication Date
    2015-08-24
    Print Publication Date
    2015-09-02
    Permanent link to this record
    http://hdl.handle.net/10754/576137
    
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    Abstract
    An innovative method for the preparation of elastomeric magnetic films with increased magneto-responsivity is presented. Polymeric films containing aligned magnetic microchains throughout their thickness are formed upon the magnetophoretic transport and assembly of microparticles during polymer curing. The obtained films are subsequently magnetized at a high magnetic field of 3 T directed parallel to the orientation of the microchains. We prove that the combination of both alignment of the particles along a favorable direction during curing and the subsequent magnetization of the solid films induces an impressive increase of the films’ deflection. Specifically, the displacements reach few millimeters, up to 85 times higher than those of the nontreated films with the same particle concentration. Such a process can improve the performance of the magnetic films without increasing the amount of magnetic fillers and, thus, without compromising the mechanical properties of the resulting composites. The proposed method can be used for the fabrication of magnetic films suitable as components in systems in which large displacements at relatively low magnetic fields are required, such as sensors and drug delivery or microfluidic systems, especially where remote control of valves is requested to achieve appropriate flow and mixing of liquids.
    Citation
    Highly Magneto-Responsive Elastomeric Films Created by a Two-Step Fabrication Process 2015:150824074924006 ACS Applied Materials & Interfaces
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.5b04711
    PubMed ID
    26299444
    Additional Links
    http://pubs.acs.org/doi/10.1021/acsami.5b04711
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.5b04711
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