Abstract
In this research, the special effects of graphene oxide nanoparticle charging (0, 2, 4, 6, wt.%) on the properties of medium-density fiberboard were examined. Physical and mechanical properties of the panels were determined conferring the method of European Norm standards. The consequences exhibited substantial enhancement in mechanical properties, explicitly in modulus of rupture, modulus of elasticity and internal bonding for 2–6% nanoparticle addition in a urea–formaldehyde resin. The mechanical properties, i.e., internal bond, modulus of elasticity and modulus of rupture were improved by 28.5%, 19.22% and 38.8%, respectively. Results also show a clear enhancement in thickness swelling and water absorption. The physical properties of thickness swelling, water absorption and thermal conductivity were improved up to 50%, 19.5% and 39.79%, respectively. The addition of graphene oxide nanoparticles strongly affected the curing time of the urea–formaldehyde resin and improved its thermal stability.
Highlights
In the last decade, the properties of graphene materials have been intensively studied in the scientific community owing to their exceptional thermal, mechanical and electrical properties [1]
Scanning electron microscopy (SEM) of graphene oxide is shown in Figure 2 below
In this research study, nano medium-density fiberboard (MDF) panels of 16 mm thickness were manufactured with four concentrations levels, 0%, 2%, 4% and 6%, of graphene oxide nanoparticles
Summary
The properties of graphene materials have been intensively studied in the scientific community owing to their exceptional thermal, mechanical and electrical properties [1]. Graphene oxide is the graphene derivatives characterized by the presence of oxygen functional groups on the graphene surface and, by the presence of defects in the graphene hexagonal rings as well. Such disorder in the graphene structure leads to many unique properties of GO. Due to the presence of oxygen groups bonded to the surface, GO is an electrical insulator (ideal graphene is an excellent semiconductor). The surface of GO is susceptible to modifications with different molecules, including biological ones, which allows composites with strictly controlled and desired properties to be synthesized. GO, due to its large active surface areas, can serve as a platform for biological molecules (both organic and inorganic) to be safely introduced into the fibers without the risk of uncontrolled and undesirable spreading into the surroundings [2,3]
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