Magnetic Epoxy Resin Nanocomposites Reinforced with Core-Shell Structured Fe@FeO Nanoparticles: Fabrication and Property Analysis

被引：118

作者：

Zhu, Jiahua ^{[1
]}

Wei, Suying ^{[2
]}

Ryu, Jongeun ^{[3
]}

Sun, Luyi ^{[4
]}

Luo, Zhiping ^{[5
]}

Guo, Zhanhu ^{[1
]}

机构：

[1] Lamar Univ, ICL, Dan F Smith Dept Chem Engn, Beaumont, TX 77710 USA

[2] Lamar Univ, Dept Chem & Phys, Beaumont, TX 77710 USA

[3] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA

[4] SW Texas State Univ, Dept Chem & Biochem, San Marcos, TX 78666 USA

[5] Texas A&M Univ, Microscopy & Imaging Ctr, College Stn, TX 77843 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2010年 / 2卷 / 07期

关键词：

polymer-matrix composites; magnetic properties; rheology; nanoparticles; electrical properties; mechanical properties; IRON-OXIDE; POLYMER NANOCOMPOSITES; MECHANICAL-PROPERTIES; ELECTRICAL-PROPERTIES; PERCOLATION; RHEOLOGY;

D O I：

10.1021/am100361h

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Epoxy resin nanocomposites reinforced with various loadings of core-shell structured nanoparticles (Fe@FeO) are prepared using a surface wetting method. Nanoparticle loading effect on the viscosity of epoxy monomers is well-correlated to Cross' rheological model. Dynamic mechanical analysis (DMA) results reveal that the glass transition temperature is increased by 10 degrees C with the addition of nanoparticles, which is surprisingly independent of the particle loadings. The saturation magnetization (M-s) of the 20 wt % Fe@FeO/epoxy nanocomposites is 17.03 emu/g, which is about 15.8% of that of the pure nanoparticles. Meanwhile. the coercivity increases from 62.33 to 202.13 Oe after the nanoparticles are dispersed in the epoxy matrix. The electrical conductivity percolation is found to be around 5-10 wt %. where the resistance of the nanocomposites sharply decreases by 6 orders of magnitude. Thermal stability and tensile properties of the pristine epoxy and nanocomposites are also Investigated in this work.

引用

页码：2100 / 2107

页数：8