Effects of addition of silica nanospheres on mechanical properties of clay/sodium polyacrylate hydrogels
Effects of addition of silica nanospheres on mechanical properties of clay/sodium polyacrylate hydrogels
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DOI：
10.1016/j.mtcomm.2021.102710
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发表时间：
2021-08-13
影响因子：
3.8
通讯作者：
Kimura, K.
中科院分区：
文献类型：
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作者：
Takeno, H.;Aoki, Y.;Kimura, K.
在这项研究中，我们研究了二氧化硅纳米球的加入对粘土/PAAS水凝胶力学性能的影响。因此，在粘土/PAAS水凝胶中添加SiO2纳米球可以显著提高其抗拉强度和拉伸性能。有趣的是，石英晶体微天平（QCM）和傅里叶变换红外光谱（FT-IR）测量显示，尽管机械性能有所提高，但SiO2纳米球不会粘附任何其他成分。此外，同步加速器小角x射线散射（SAXS）分析表明，粘土薄片在粘土/SiO2/PAAS水凝胶中相对分散。由此我们得出结论，SiO2纳米球的加入提高了材料的力学性能，这可能是由于SiO2和PAAS之间的静电斥力导致吸附在粘土颗粒上的PAAS分子数量增加。
In this study, we investigated the effect of the addition of silica (SiO2) nanospheres on the mechanical properties of clay/PAAS hydrogels. Consequently, the addition of SiO2 nanospheres to the clay/PAAS hydrogels remarkably enhanced mechanical performance such as tensile strength and extensibility. Interestingly, quartz crystal microbalance (QCM) and Fourier transform infrared spectroscopy (FT-IR) measurements reveal that SiO2 nanospheres do not adhere to any other constituents despite the improvement of mechanical performance. Additionally, synchrotron small-angle X-ray scattering (SAXS) analysis reveals that clay platelets comparatively disperse in the clay/SiO2/PAAS hydrogels. We conclude from these results that the mechanical performance enhanced by the addition of SiO2 nanospheres may come from the increase in the number of PAAS molecules adsorbed on clay particles arising from the electrostatic repulsion between SiO2 and PAAS.