Polyaniline Stabilized Magnetite Nanoparticle Reinforced Epoxy Nanocomposites

Autor: Zhanhu Guo, Hongbo Gu, Sruthi Tadakamalla, Yudong Huang, Suying Wei, Neel Haldolaarachchige, David P. Young, Henry A. Colorado, Zhiping Luo
Rok vydání: 2012
Předmět:
Zdroj: ACS Applied Materials & Interfaces. 4:5613-5624
ISSN: 1944-8252
1944-8244
DOI: 10.1021/am301529t
Popis: Magnetic epoxy polymer nanocomposites (PNCs) reinforced with magnetite (Fe(3)O(4)) nanoparticles (NPs) have been prepared at different particle loading levels. The particle surface functionality tuned by conductive polyaniline (PANI) is achieved via a surface initiated polymerization (SIP) approach. The effects of nanoparticle loading, surface functionality, and temperature on both the viscosity and storage/loss modulus of liquid epoxy resin suspensions and the physicochemical properties of the cured solid PNCs are systematically investigated. The glass transition temperature (T(g)) of the cured epoxy filled with the functionalized NPs has shifted to the higher temperature in the dynamic mechanical analysis (DMA) compared with that of the cured pure epoxy. Enhanced mechanical properties of the cured epoxy PNCs filled with the functionalized NPs are observed in the tensile test compared with that of the cured pure epoxy and cured epoxy PNCs filled with as-received NPs. The uniform NP distribution in the cured epoxy PNCs filled with functionalized NPs is observed by scanning electron microscope (SEM). These magnetic epoxy PNCs show the good magnetic properties and can be attached by a permanent magnet. Enhanced interfacial interaction between NPs and epoxy is revealed in the fracture surface analysis. The PNCs formation mechanism is also interpreted from the comprehensive analysis based on the TGA, DSC, and FTIR in this work.
Databáze: OpenAIRE