Preparation and Properties of Poly(vinyl alcohol) Films Containing Magnetite Functionalized–Multiwalled Carbon Nanotubes

I. Kong, R.A. Shanks, M.N.M. Ansari, G.H. Krishna Rao
Universiti Tenaga Nasional, MY

Keywords: CNT, MWCNT

Summary:

The research field of carbon nanotubes (CNT) has received a continuous growing interest since these tubes were discovered in 1991. They have attracted attention as ideal reinforcement in composites with various matrices due to their unique structural, extraordinary mechanical, electrical and thermal properties. Recently, many efforts have been made towards decorating CNT with different materials, especially CNT coated or filled with magnetic nanoparticles which have attracted considerable interest due to their potential in applications such as biomedical, magnetic data storage, microwave absorber and heterogeneous catalysis. However, most of their works focused on the CNT–magnetic materials hybrid, with only few studies reported on the properties of CNT–magnetic materials hybrid reinforced polymer composites. Poly(vinyl alcohol) (PVA) has been considered to be a truly biodegradable synthetic polymer since 1930s. It is used widely in paper coating, paper adhesives, textile sizing agent, and flexible water-soluble packaging films. Modification of PVA with various fillers is common to enhance its film performance. The dispersion state of fillers in this polymer is critical in determining the final property of the polymer composites. PVA composites films containing magnetite–functionalized multiwalled carbon nanotubes (MWCNTs) were prepared using two different methods: casting and coagulating the PVA–fillers dispersion.