Jiangkongkho Pornpot, Arksornnukit Mansuang, Takahashi Hidekazu
Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University.
Oral Biomaterials Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Dent Mater J. 2018 Jul 29;37(4):582-591. doi: 10.4012/dmj.2017-142. Epub 2018 Jan 31.
This study aimed to investigate amount of γ-methacryloxypropyltrimethoxysilane (MPS) silanized on experimental nanosilica particles (NPs), amount of NP and amount of MPS silanized NP on flexural strength (FS), flexural modulus (FM), and fracture toughness (FT) of NP reinforced polymethyl methacrylate (PMMA). The chemisorbed amount of MPS was determined using elemental analysis. Six groups (n=8) were prepared with chemisorbed amount and mixed with PMMA-monomer to make 0.25, 0.5, 1, 5, 10 and 15% (w/w) of NP reinforced PMMA. PMMA without NP served as control. Seven groups (n=8) were prepared with 1% of NP silanized with 0, 0.061, 0.123, 0.246, 0.493, 0.987, and 1.974 g/g and mixed with PMMA-monomer to make NP reinforced PMMA. FS, FM, and FT were determined using 3-point bending test. One-way ANOVA and multiple comparisons showed that 0.246 g/g of 1% amount of silanized NP group was significantly highest in FS, FM, and FT compared to the others (p<0.05).
本研究旨在探究实验性纳米二氧化硅颗粒（NPs）上硅烷化的γ-甲基丙烯酰氧基丙基三甲氧基硅烷（MPS）的量、纳米颗粒的量以及硅烷化纳米颗粒的量对纳米颗粒增强聚甲基丙烯酸甲酯（PMMA）的弯曲强度（FS）、弯曲模量（FM）和断裂韧性（FT）的影响。使用元素分析确定MPS的化学吸附量。制备六组（n = 8），根据化学吸附量与PMMA单体混合，制成含0.25%、0.5%、1%、5%、10%和15%（w/w）纳米颗粒增强的PMMA。不含纳米颗粒的PMMA用作对照。制备七组（n = 8），用0、0.061、0.123、0.246、0.493、0.987和1.974 g/g的量对1%的纳米颗粒进行硅烷化，然后与PMMA单体混合制成纳米颗粒增强的PMMA。使用三点弯曲试验测定FS、FM和FT。单因素方差分析和多重比较表明，与其他组相比，硅烷化纳米颗粒含量为1%且用量为0.246 g/g的组在FS、FM和FT方面显著最高（p<0.05）。
