ENHANCING THE MECHANICAL PROPERTIES OF THE SOL-GEL GLASS IONOMER CEMENT BY TREATED CHITOSAN FIBER REINFORCEMENT
Keywords:
Glass ionomer cement, sol-gel, treatment fiber, chitosan fiber, reinforcementAbstract
Glass ionomer cement (GIC) is commonly used for a restorative dental material which has good physical, biological and mainly anti-caries properties. The sol-gel method is a candidate method for low temperature and controlling glass composition. In this study, the glass ionomer for 4.5SiO2-4Al2O3-0.45P2O3-2CaO-2F2 composition was synthesized by the sol-gel method and the treated chitosan fibers were added to reinforce the mechanical properties of the sol-gel GIC. The chitosan fibers were cut randomly with the average length of 1 mm and treated by acetic acid at concentrations of 0.3 M and 0.5 M. After treatment, chemical analysis of chitosan fibers was characterized by Fourier Transform Infrared Spectroscopy (FT-IR) and the morphology of chitosan fiber was observed by scanning electron microscope (SEM). The sol-gel GIC was reinforced with chitosan fibers at the different amount of 0.1, 0.5, and 1 wt%. The compressive strength of GIC reinforced with 0.1 wt% treated chitosan fiber in 0.5 M acetic acid was significantly improved as compared to the GIC without reinforcement. The setting time of GIC was slightly decrease when increasing the fibers. This study successfully improved the compressive strength of the sol-gel GIC by reinforcing with 0.1 wt% chitosan fiber treated in 0.5 M acetic acid.
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