皮克林乳液
乳状液
吸附
化学工程
Zeta电位
表面改性
两亲性
粘度
材料科学
粒子(生态学)
提高采收率
油滴
环境修复
纳米颗粒
色谱法
化学
纳米技术
有机化学
共聚物
复合材料
聚合物
污染
海洋学
地质学
工程类
生物
生态学
作者
Xinyu Zhao,Furui He,Gaobo Yu,Feng Ye,Jiacheng Li
标识
DOI:10.1016/j.carbpol.2021.118492
摘要
The separation of crude oil from oily water and collection of the emulsion constituents has attracted significant attention. We demonstrate that the relationships between inherent dynamic factors and the performance of a Pickering emulsion stabilized by SiO2 particles with adsorbed hydrophobically modified sodium alginate derivatives (HMSA), a natural pH-sensitive polysaccharide, can be clarified via a multi-scale methodology. Functionalization of the silica surface with HMSA controls particle dispersibility, as verified by turbidity and stability analyses, the zeta potential, and transmission electron microscopy measurements. The interaction mechanism between HMSA and SiO2 nanoparticles was elucidated by both experimental adsorption measurements and computer simulations, which showed qualitative consistency. The aggregation/disaggregation of HMSA/SiO2 particles achieved by tuning the pH of the solution facilitated reversible dispersibility/collectability behavior. Overall, a high-viscosity Pickering emulsion system based on particle-particle and droplet-droplet interactions, which can be filtered for the recovery of spilled crude oil, was demonstrated.
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