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Effect of silica nanoparticles on mechanical properties of self-cured acrylic resin
Journal of Nanoparticle Research ( IF 2.5 ) Pub Date : 2020-10-21 , DOI: 10.1007/s11051-020-05050-y
C. M. B. Mussatto , E. M. N. Oliveira , K. Subramani , R. M. Papaléo , E. G. Mota

The purpose of this in vitro study is to evaluate the effect of the incorporation of silanized and non-silanized silica nanoparticles (~ 160 nm) in mechanical properties and surface roughness of self-cured acrylic resins. Five groups of samples were produced (with six specimens each), following the ISO 20795-1:2013 specifications. In the control group (Ctrl), no particles were added in the resin composition. Non-silanized silica nanoparticles were added either into the polymer (0.7 wt%, group G1) or into the monomer (0.27 wt%, G2). Two equivalent groups were formed for composite resins with silanized nanoparticles (groups G3 with 0.7 wt% incorporated into the polymer and G4 with 0.27 wt% added into the monomer). Data were submitted to Shapiro-Wilk (α = 0.05) and ANOVA/Tukey (α = 0.05). Nanoparticle-loaded resins showed similar microhardness as the control and a reduced flexural strength (20–27%) which was neither dependent on the amount of filler added nor in the method of nanoparticle incorporation. Surface silanization caused no major improvement in the mechanical behavior of the nanoresins but appears to improve dispersibility, as indicated by a smaller surface roughness.



中文翻译:

二氧化硅纳米粒子对自固化丙烯酸树脂力学性能的影响

这项体外研究的目的是评估硅烷化和未硅烷化的二氧化硅纳米粒子(〜160 nm)的掺入对自固化丙烯酸树脂的机械性能和表面粗糙度的影响。按照ISO 20795-1:2013规范,生产了五组样品(每组六个样品)。在对照组(Ctrl)中,没有在树脂组合物中添加颗粒。将未硅烷化的二氧化硅纳米粒子添加到聚合物(0.7 wt%,G1组)或单体(0.27 wt%,G2)中。对于具有硅烷化的纳米颗粒的复合树脂,形成了两个等效的基团(聚合物中掺入0.7 wt%的组G3和单体中掺入0.27 wt%的G4)。数据已提交给Shapiro-Wilk(α  = 0.05)和ANOVA / Tukey(α = 0.05)。负载纳米颗粒的树脂显示出与对照相似的显微硬度,并且抗弯强度降低(20–27%),这既不依赖于添加的填料量,也不依赖于纳米颗粒的掺入方法。表面硅烷化并未引起纳米树脂机械性能的重大改善,但似乎改善了分散性,如较小的表面粗糙度所表明。

更新日期:2020-10-27
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