Emulsion microstructural evolution with the action of environmentally friendly demulsifying bacteria
Emulsion microstructural evolution with the action of environmentally friendly demulsifying bacteria
复制标题
环保破乳菌作用下乳液微观结构的演变
DOI：
10.1016/j.colsurfa.2018.06.005
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发表时间：
2018-09
期刊：
影响因子：
--
通讯作者：
Huang Xiangfeng
中科院分区：
文献类型：
--
作者：
Peng Kaiming;Liu Wanqi;Xiong Yongjiao;Lu Lijun;Liu Jia;Huang Xiangfeng
破乳菌是一种环境友好型的软颗粒，可用于从表面活性剂稳定的乳状液中回收油和净化水。然而，这种破乳机制的细节尚不清楚。在这里，我们调查的乳状液相行为和微观结构的演变在真实的空间和时间，以及细菌S-XJ-1在这种演变中的具体作用，通过多方面的方法。结果表明，S-XJ-1乳液相行为的新特征表现为全区域滴-滴聚结，导致乳液网络崩溃，随后发生滴重排，导致乳液空间分层清晰。在真实的乳状液体系中，细菌吸附在油水界面上，聚集成菌群，并在界面处变得不均匀分布。使用微量移液器和座滴技术，细菌的特殊行为被示出为改善滴-滴和滴-界面聚结。因此，细菌在界面处的分布和聚集有助于相邻水滴的桥接，破坏原始界面膜，并促进水滴聚结。这项研究提供了一个洞察粒子破乳剂在乳状液微观结构演变的作用。
Demulsifying bacteria, as soft particles, are environmentally friendly agents used to recycle oil and purify water from surfactant-stabilized emulsions. However, details of this demulsification mechanism are unclear. Herein, we investigate the emulsion phase behavior and microstructural evolution in real space and time, as well as the specific role of the bacterium S-XJ-1 in this evolution through multifaceted approaches. Results reveal that new features of emulsion phase behavior with S-XJ-1 exhibited whole zone drop-drop coalescence, which caused emulsion network collapse, followed by drop rearrangement, which led to clear spatial layering of the emulsion. The bacteria adsorb onto the water-oil interface, aggregate into bacterial clusters, and become unevenly distributed at the interfaces in real emulsion systems. The bacterial peculiar behaviors were shown to improve drop-drop and drop-interface coalescence using micropipettes and sessile drop technology. Thus, the distribution and aggregation of bacteria at the interface could contribute to the bridging of neighboring water drops, rupture the original interface films, and improve drop coalescence. This study provides an insight into the role of particle demulsifiers in emulsion microstructural evolution.
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DOI：
10.1016/s0927-7757(98)00680-3
发表时间：
1999-07-15
影响因子：
5.2
作者：
Mengual, O;Meunier, G;Snabre, P
通讯作者：
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DOI：
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期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
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影响因子：
13.6
作者：
Liu, Jia;Huang, Xiang-feng;Deng, Hui-ping
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Deng, Hui-ping
DOI：
10.1016/j.colsurfa.2017.07.085
发表时间：
2017-10-20
影响因子：
5.2
作者：
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通讯作者：
Muelheims, Kerstin