The effect of Nano-MgO on the mechanical and flammability properties of hybrid nano composites from wood flour-polyethylene
This study considered the effect of nanomagnesium oxide on the mechanical and flammability features of composites made of wood flour and high-density polyethylene. A sample of wood flour was made from the mixture of hardwoods and high density polyethylene with the weight ratio of 50%. Maleic anhydride was added as a compatibilizer (2 phc), and nanomagnesium oxide was applied at 6 levels (0, 1, 2, 3, 4, 5 phc). These materials were mixed, and samples were prepared with determined sizes by injection molding machine. The samples were subjected to flexural tests to examine the mechanical features, and to study flammability strength, various tests were conducted with a cone calorimeter, including the amount of char residue, total smoke production, time to ignition, and heat release rate, according to ASTM E1354-92 (1992). The addition of up to 3 phc nanomagnesium oxide increased flexural strength and modulus, but further additions decreased these values. The addition of 5 phc nanomagnesium oxide increased the char residue and ignition time, and it decreased the heat release rate, total smoke production, and burning rate. Scanning electron microscopy and energy dispersive X-ray (EDX) analysis indicated the improper transmittance of nanomagnesium oxide and accumulations in the samples.
American Society for Testing and Materials. ASTM. 2010. Standard test method for bending properties of unreinforced and reinforced plastics and electrical insulating materials, D790-10. West Conshohocken, PA, USA.
American Society for Testing and Materials. ASTM. 1998. Standard test method for rate of burning and/or extent and time of burning of plastics in a horizontal position, D635-98. West Conshohocken, PA.
American Society for Testing and Materials. ASTM. 1992. Standard test method for heat and visible smoke release rates for materials and products using an oxygen consumption calorimeter, E1354-92, West Conshohocken, PA.
Balasuriya, P.W.; Ye, L.; Mai, Y.W. 2001. Mechanical properties of wood flake-polyethylene composites. Part 1: Effects of processing methods and matrix melt flow behavior. Composites: Part A 32(5): 619-629.
Kiaei, M.; Kord, B.; Vaysi, R. 2014. Influence of residual lignin content on physical and mechanical properties of kraft pulp/pp composites. Maderas-Cienc Tecnol 16(4): 495-503.
Deka, B.K.; Maji, T.K. 2012. Effect of nanoclay and ZnO on the physical and chemical properties of wood polymer nanocomposite. Journal of Applied Polymer Science 124(4): 2919-2929.
Gao, H.; Song, Y.M.; Wang, Q.W.; Han, Z.; Zhang, M.L. 2008. Rheological and mechanical properties of wood fiber-PP/PE blend composites. Journal of Forestry Research 19(4): 315-318.
Gao, H.; Xie, Y.; Ou, R.; Wang, Q. 2012. Grafting effects of polypropylene/polyethylene blends with maleic anhydride on the properties of the resulting wood-plastic composites. Composites Part A: Applied Science and Manufacturing 43(1): 150-157.
Guo, G.; Park, C.B.; Lee, Y.H.; Kim, Y.S.; and Sain, M. 2007. Flame retarding effect of nanoclay on wood-fiber composites. Polymer Engineering and Science 47(3): 330-336.
Kord, B. 2012. Effect of nanoclay particles on the physical properties and flammability of HDPE/ wood flour composites. Journal of Wood and Forest Science and Technology 18(4): 131-143.
Mazaheri, N.; Karimi, A.; Salavati, H.; Rezaei Zarchi, S.; Khalilian, S.; Rezaei Ranjbar Sardari, R. 2014. Investigating the effect of intraperitoneal injection of magnesium oxide nanoparticles on the liver and kidney function of rat in vivo. Journal of Shahid Sadoughi University of Medical Science 22(4): 1430-1438.
Nemati, M.; Eslam, H.K.; Talaeipour, M.; Bazyar, B.; Samariha, A. 2016. Effect of nanoclay on flammability behavior and morphology of nanocomposites from wood flour and polystyrene materials. BioResources 11(1): 748-758.
Poletto, M. 2016. Effect of styrene maleic anhydride on physical and mechanical properties of recycled polystyrene wood flour composites. Maderas-Cienc Tecnol 18(4): 533-542.
Sahraeian, R. 2004. Flammability Behavior of Nanocomposites of Polymer-Clay Soil, Master’s Thesis, Tarbiat Modarres University, Tehran, Iran.
Samariha, A.; Hemmasi, A.H.; Ghasemi, I.; Bazyar, B.; Nemati, M. 2015. Effect of nanoclay contents on properties, of bagasse flour/reprocessed high density polyethylene/nanoclay composites. Maderas-Cienc Tecnol 17(3): 637-646.
Wu, Q.; Lei, Y.; Yao, F.; Xu, Y.; Lian, K. 2007. Properties of HDPE/clay/wood nanocomposites. in: 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems, Sanya, China, pp. 181-188.