| A Highly Tunable Silicone-Based Magnetic Elastomer with Nanoscale Homogeneity. | |
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MedLine Citation:
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PMID: 22184482 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Magnetic elastomers have been widely pursued for sensing and actuation applications. Silicone-based magnetic elastomers have a number of advantages over other materials such as hydrogels, but aggregation of magnetic nanoparticles within silicones is difficult to prevent. Aggregation inherently limits the minimum size of fabricated structures and leads to non-uniform response from structure to structure. We have developed a novel material which is a complex of a silicone polymer (polydimethylsiloxane-co-aminopropylmethylsiloxane) adsorbed onto the surface of magnetite (γ-Fe(2)0(3)) nanoparticles 7-10 nm in diameter. The material is homogenous at very small length scales (< 100 nm) and can be crosslinked to form a flexible, magnetic material which is ideally suited for the fabrication of micro- to nanoscale magnetic actuators. The loading fraction of magnetic nanoparticles in the composite can be varied smoothly from 0 - 50% wt. without loss of homogeneity, providing a simple mechanism for tuning actuator response. We evaluate the material properties of the composite across a range of nanoparticle loading, and demonstrate a magnetic-field-induced increase in compressive modulus as high as 300%. Furthermore, we implement a strategy for predicting the optimal nanoparticle loading for magnetic actuation applications, and show that our predictions correlate well with experimental findings. |
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Authors:
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Benjamin A Evans; Briana L Fiser; Willem J Prins; Daniel J Rapp; Adam R Shields; Daniel R Glass; R Superfine |
Publication Detail:
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Type: JOURNAL ARTICLE |
Journal Detail:
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Title: Journal of magnetism and magnetic materials Volume: 324 ISSN: 0304-8853 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2011-12-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101314425 Medline TA: J Magn Magn Mater Country: - |
Other Details:
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Languages: ENG Pagination: 501-507 Citation Subset: - |
Affiliation:
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Department of Physics, Elon University, Elon, NC 27244 (USA). |
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Descriptor/Qualifier:
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| Grant Support | |
ID/Acronym/Agency:
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P41 EB002025-21A1//NIBIB NIH HHS; R01 HL077546-01A2//NHLBI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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