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Silane treatment of magnetite filler and its effect on the properties of magnetite-filled epoxy thin-film composites

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Abstract

Surface modification of magnetite by 3-aminopropyltriethoxysilane coupling agent (3APTES) at different percentages (5, 10, and 20 wt%) with variable treatment times (3, 5, and 7 h) was performed. The effects of these two variables on the properties of magnetite-filled epoxy thin-film composite were investigated. Treated composites exhibited higher saturation magnetization, storage modulus and T g than untreated composites. Increasing 3APTES amount associated with increasing treatment time improved both the interfacial adhesion of magnetite filler matrix and the properties of treated composites. However, using a comparison system at a fixed treatment time, the system treated with a higher concentration of 3APTES exhibited lower saturation magnetization than that treated with a lower concentration. This result can be attributed to the thick coating on the filler surface that acted as a non-magnetic mass to the total sample volume and subsequently reduced the magnetization efficiency.

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Acknowledgments

The authors gratefully acknowledge the support of the Universiti Sains Malaysia, and Ministry of Education, Malaysia for granting Explorating Research Grant Scheme (ERGS) used for this project (Project No. 6730109).

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  1. School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Penang, Malaysia

    M. S. Boon & M. Mariatti

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  1. M. S. Boon
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  2. M. Mariatti
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Correspondence to M. Mariatti.

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Boon, M.S., Mariatti, M. Silane treatment of magnetite filler and its effect on the properties of magnetite-filled epoxy thin-film composites. Polym. Bull. 71, 3333–3346 (2014). https://doi.org/10.1007/s00289-014-1253-8

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  • DOI: https://doi.org/10.1007/s00289-014-1253-8

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