การศึกษาคุณสมบัติดัดขวางของพอลิเมทิลเมทาคริเลตเสริมด้วยอนุภาคนาโนอลูมินาที่ผ่านการปรับสภาพผิวด้วยสารคู่ควบไซเลนในปริมาณที่แตกต่างกัน

Abstract

Purposes: To study amount of silane coupling agent that form monolayer on nano-alumina particles and the effect of silanized nano-alumina particles mixed in acrylic resin on flexural strength and modulus of elasticity. Materials and Methods: Silanized nano-alumina and non-silanized nano-alumina particles were mixed with acrylic resin at concentrations of 0.25, 0.5, 0.75, 1, 3 and 5% w/w, producing the experimental groups. The control group was acrylic resin without nano-alumina. The specimens were 10 mm in width, 64 mm in length and 3.3 mm in thickness. Flexural strength and modulus of elasticity were investigated for all groups and were analyzed using one-way ANOVA at 95% confidence intervals. Results: The average flexural strength ranged between 75.86 - 100.63 MPa. The highest average flexural strength was found in the 0.25% w/w silanized nano-alumina group (100.63 MPa ± 14.05) and significantly higher than control group. The average modulus of elasticity ranged between 1.95 - 3.92 GPa. The highest average modulus of elasticity was found in the 0.5% w/w silanized nano -alumina group (3.92 ± 0.81 GPa). Conclusion: The highest average flexural strength was found in the 0.25% w/w silanized nano -alumina group and was significantly different from control group. The average flexural strength of resin acrylic mixed with non-silanized alumina group were not significantly different from control group. The average modulus of elasticity values in all the non - silanized nano-alumina groups were significantly lower than those of the control group and all silanized nano-alumina groups.