Significantly suppressed coalescence in flowing polymer blends by a synergy between surface chemistry and roughness of nanoparticles
Significantly suppressed coalescence in flowing polymer blends by a synergy between surface chemistry and roughness of nanoparticles
复制标题
通过表面化学和纳米颗粒粗糙度之间的协同作用，显着抑制流动聚合物共混物的聚结
DOI：
10.1016/j.polymer.2021.123698
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发表时间：
2021-05
期刊：
影响因子：
4.6
通讯作者：
Li Guangxian
中科院分区：
文献类型：
--
作者：
Yao Yingchun;Xiang Siying;Lu Miaomiao;Huang Yajiang;Kong Miqiu;Li Guangxian
纳米粒子对不混溶聚合物共混物的增容效率在很大程度上取决于纳米粒子的结构细节。在这里，我们合成了三种荧光标记的二氧化硅纳米粒子具有不同的表面化学和粗糙度，通过使用溶胶-凝胶和静电吸附方法。采用流动共聚焦激光扫描显微镜原位研究了纳米粒子对聚异丁烯/聚环氧乙烷（10/90）共混物在慢剪切流动条件下的稳定作用。结果发现，NP的表面化学和浓度决定了NP负载的共混物是否得到细化或粗化，而颗粒粗糙度进一步调节相尺寸变化的幅度。具有纳米级粗糙度的疏水纳米颗粒表现出最高的稳定效率，由于更好的分散在共混物界面。因此，表面粗糙度是合理设计聚合物共混物的NP基相容剂的一个有前途的参数。
The compatibilization efficiency of nanoparticles (NPs) towards immiscible polymer blends highly depends on the structural details of NPs. Here, we synthesized three kinds of fluorescently labeled silica NPs with different surface chemistries and roughnesses by using the sol-gel and electrostatic adsorption methods. The efficiencies of NPs in stabilizing immiscible polyisobutylene/polyethylene oxide (10/90) blends under slow shear flow were evaluatedin-situby using the flow-confocal laser scanning microscopy. It was found that the surface chemistry and concentration of NPs determined whether the NP-laden blends get refined or coarsened while the particle roughness further regulates the magnitude of the change in the phase size. Hydrophobic NPs with nanoscale roughness demonstrated the highest stabilization efficiency owing to better dispersion at the blend interface. Therefore, surface roughness is a promising parameter in rationally designing NP-based compatibilizers for polymer blends.
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影响因子：
3.4
作者：
Steven Vandebril;J. Vermant;P. Moldenaers
通讯作者：
Steven Vandebril;J. Vermant;P. Moldenaers
DOI：
10.1073/pnas.1116820109
发表时间：
2012-07-03
影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
3.4
作者：
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通讯作者：
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