Effect of nano-SiO2 on physical and mechanical properties of fiber reinforced composites (FRCs)

Abstract

This study evaluated reinforcing effect of waste lignocellulosic material (bagasse) and nano-SiO 2 powder on physical and mechanical properties of nano-biocomposites. In the specimen preparation, three levels of nanoSiO 2 (0, 2, and 5 wt%) and 40 wt% of fibers were used. In order to increase the interphase adhesion, polyethylene grafted with maleic anhydride was added as a coupling agent to all composites studied. The results showed that while tensile, flexural, and hardness properties were moderately improved by adding bagasse fibers and increasing nano-SiO 2 (NDS) content, Izod impact strength decreased dramatically, but fibers filled composite with 5 wt% nanoSiO 2 showed similar impact strength value to pure HDPE specimen. Natural fibers and increasing levels of nanoSiO 2 particles led to an upward trend for water absorption, while thickness swelling sharply increased and leveled off with adding these fillers. The results of study demonstrate positive effects of waste lignocellulosic material and nanoSiO 2 particles on physical and mechanical properties of composites.

Effect of silicon carbide and pulping processes on physical and mechanical properties of pulp plastic composites (PPCs)

“…[1]. Increasing wood costs and competition of wood resources led to develop natural fiber sources as alternative, cheap, and environmentally friendly materials for plastic composites [2]. The utilization of lignocellulosic material, such as wood or non-wood as a reinforcing component in polymer composites (thermoplastic or thermoset), has received considerable attention particularly for price-driven/high-volume application [3][4][5][6][7][8].…”

Investigation on physical and mechanical properties of pulp–plastic composites from bagasse

“…This negative effect may be ascribed to the reduction of polymer matrix content and poor compatibility between the fibers and polymer matrix. Decreases in impact strength values by addition of natural fibers are observed in many studies (Klyosov 2007, Mengeloğlu and Karakus 2008, Basiji et al 2010, Hosseini et al 2014.…”

“…There are a large variety of natural fibers such as rice straw, rice husk, wheat straw, corn stalks, palm, bagasse, hemp, flax and other agricultural residues (Ayora et al 1997, Joo and Cho 1999, Sombatsompop et al 2003, Jiang and Kamdem 2004, Hosseini et al 2014. Natural fibers contain various organic materials (mainly celluloses as well as hemicelluloses and lignin) and there are several chemical treatments such as bleaching, esterification, silane treatment, use of compatibilizer, acetylation, alkali treatment and treatment with other chemicals in order to enhance the fiber matrix adhesion, which improve the physical and mechanical properties of composites (Gu 2009, Migneault et al 2009, Alves et al 2010, Carvalho et al 2010, Wong et al 2010.…”

Effect of Water on Some Mechanical Properties of Epoxy Blends Reinforced With Different Weight Fractions of Nano Titanium Oxide and Nano Silica

“…This behavior suggests that a plasticization process took place when the specimens were immersed in water, and the amount of decrease in Young's modulus was more significant with the blend without any reinforcement, which supports the idea that nano reinforcements served the composite material in a beneficially. [12], [8]. Figure-4 shows the three point test specimens that were tested before and after immersion in water for 10 weeks.…”

“…The nano fillers are believed to have the high specific surface area needed to reduce the effects of applied mechanical stresses, in addition to their filling effect that serve the same purpose [8].…”