Morphological stabilization efficiencies of nanoparticles toward flowing polymer blends: Role of roughness and viscosity ratio
Morphological stabilization efficiencies of nanoparticles toward flowing polymer blends: Role of roughness and viscosity ratio
复制标题
纳米粒子对流动聚合物共混物的形态稳定效率：粗糙度和粘度比的作用
DOI：
10.1016/j.colsurfa.2022.129094
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Guangxian Li
中科院分区：
文献类型：
--
作者：
Miaomiao Lu;Siying Xiang;Yajiang Huang;Guangxian Li
据报道，纳米颗粒对聚合物共混物的增容效率取决于粘度比。然而，在粗糙NPs的情况下，这种影响很少被考虑。本研究合成了具有不同粗糙度的荧光标记疏水性二氧化硅（SiO2） NPs，并通过共聚焦激光扫描显微镜原位评价了这些NPs对流动的聚异丁烯/聚乙二醇共混物的形态稳定效率。表面粗糙度影响了NPs在共混界面的堆积行为，粗糙度越大的NPs对稳定流动共混物的形貌越有效。此外，发现粗NPs的形态稳定效率在很大程度上取决于共混物组分的粘度对比，这决定了NPs在共混物界面区域的覆盖范围，并且可以通过剪切流的强度来定制。因此，粘度比是评价粗NPs增容效率时应考虑的重要参数。
Compatibilization efficiency of nanoparticles (NPs) toward polymer blends has been reported to depend on the viscosity ratio. However, this effect is seldom considered in the case of rough NPs. In this study, fluorescently labeled hydrophobic silica (SiO2) NPs with different roughness were synthesized, and the morphological stabilization efficiencies of these NPs toward flowing polyisobutylene/polyethylene glycol blends were evaluated in-situ by confocal laser scanning microscopy. The surface roughness was found to affect the stacking behavior of NPs at the blend interface and NPs with larger roughness were more effective in stabilizing the morphology of flowing blends. Moreover, the morphological stabilization efficiencies of rough NPs were found to depend largely on the viscosity contrast of blend components, which determined the coverage of NPs at the interfacial area of blends and could be tailored by the strength of the shear flow. Therefore, the viscosity ratio should be an important parameter to be considered when evaluating the compatibilization efficiency of rough NPs.