Choi Young-Min, Hwangbo Seon-Ae, Lee Tae-Geol, Ham Young-Bog
Department of Thermal Systems, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
Nanosafety Team, Safety Measurement Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Korea.
Materials (Basel). 2021 May 27;14(11):2866. doi: 10.3390/ma14112866.
This study investigated the effects of the packing density and particle size distribution of TiO nanoparticles on the mechanical properties of TiO-epoxy nanocomposites (NCs). The uniform dispersion and good interfacial bonding of TiO in the epoxy resin resulted in improved mechanical properties with the addition of nanoparticles. Reinforcement nano-TiO particles dispersed in deionized water produced by three different ultrasonic dispersion methods were used; the ultrasonication effects were then compared. The nano-TiO suspension was added at 0.5-5.0 wt.%, and the mechanical and thermal properties of TiO-epoxy NCs were compared using a universal testing machine, scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and differential scanning calorimetry (DSC). The tensile strength of the NCs was improved by the dispersion strengthening effect of the TiO nanoparticles, and focused sonication improved the tensile strength the most when nano-TiO suspensions with a particle size of 100 nm or smaller were used. Thus, the reinforcing effect of TiO nanoparticles on the epoxy resin was observed, and the nano-TiO suspension produced by focused sonication showed a more distinct reinforcing effect.
本研究考察了TiO纳米颗粒的堆积密度和粒径分布对TiO-环氧树脂纳米复合材料（NCs）力学性能的影响。TiO在环氧树脂中的均匀分散和良好的界面结合使得添加纳米颗粒后力学性能得到改善。使用了通过三种不同超声分散方法制备的分散在去离子水中的增强纳米TiO颗粒；然后比较了超声处理效果。纳米TiO悬浮液的添加量为0.5-5.0 wt.%，使用万能试验机、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）和差示扫描量热法（DSC）比较了TiO-环氧树脂NCs的力学和热性能。NCs的拉伸强度因TiO纳米颗粒的分散强化作用而提高，当使用粒径为100 nm或更小的纳米TiO悬浮液时，聚焦超声处理对拉伸强度的提高最为显著。因此，观察到了TiO纳米颗粒对环氧树脂的增强作用，聚焦超声处理制备的纳米TiO悬浮液表现出更明显的增强效果。
