Silane treatment of Fe3O4 and its effect on the magnetic and wear properties of Fe3O4/epoxy nanocomposites

✍ Scribed by J.O. Park; K.Y. Rhee; S.J. Park

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 858 KB
• Volume: 256
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2010.04.110

✦ Synopsis

In this study, the effect of silane treatment of Fe 3 O 4 on the magnetic and wear properties of Fe 3 O 4 /epoxy nanocomposites was investigated. Fe 3 O 4 nanopowders were prepared by coprecipitation of iron(II) chloride tetrahydrate with iron(III) chloride hexahydrate, and the surfaces of Fe 3 O 4 were modified with 3-aminopropyltriethoxysilane. The magnetic properties of the powders were measured on unmodified and surface-modified Fe 3 O 4 /epoxy nanocomposites using SQUID magnetometer. Wear tests were performed on unmodified and surface-modified Fe 3 O 4 /epoxy nanocomposites under the same conditions (sliding speed: 0.18 m/s, load: 20 N).

The results showed that the saturation magnetization (M s ) of surface-modified Fe 3 O 4 /epoxy nanocomposites was approximately 110% greater than that of unmodified Fe 3 O 4 /epoxy nanocomposites. This showed that the specific wear rate of surface-modified Fe 3 O 4 /epoxy nanocomposites was lower than that of unmodified Fe 3 O 4 /epoxy nanocomposites. The decrease in wear rate and the increase in magnetic properties of surface-modified Fe 3 O 4 /epoxy nanocomposites occurred due to the improved dispersion of Fe 3 O 4 into the epoxy matrix.