Amphiphobic polyHIPEs with pH-triggered transition to hydrophilicity–oleophobicity for the controlled removal of water from oil–water mixtures,Polymer Chemistry

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Amphiphobic polyHIPEs with pH-triggered transition to hydrophilicity–oleophobicity for the controlled removal of water from oil–water mixtures
Polymer Chemistry ( IF 4.1 ) Pub Date : 2020-10-12 , DOI: 10.1039/d0py01144d
Xiaomin Li _{1,

2,

3,

4} , Tao Zhang _{1,

2,

3,

4,

5} , Zhiguang Xu _{4,

6,

7,

8} , Huanjie Chi _{1,

2,

3,

4} , Zhu Wu _{1,

2,

3,

4} , Yan Zhao _{1,

2,

3,

4}

Affiliation

While emulsion-templated porous polymers (polyHIPEs) with pH-controlled wetting behaviours are advantageous for the removal of oils from oil–water mixtures, they are easily clogged by oils and are not suitable for separating mixtures consisting of a small amount of water and a large amount of oils. Herein, we report the fabrication of amphiphobic polyHIPEs from high internal phase emulsions via simultaneous solution polymerization and interface-induced polymerization. After pH adjustment with an HCl solution, the amphiphobicity of the polyHIPEs was transformed into hydrophilicity–oleophobicity, which enabled water to be selectively absorbed and separated from oil–water mixtures, and the pH-triggered transition achieved the separation in a controlled manner. Moreover, the absorption was realized in a continuous manner under an external pressure provided by a pump. The resulting hydrophilic–oleophobic polyHIPEs also absorbed water from emulsified oil–water mixtures (emulsions). The pH-triggered transition from amphiphobicity to hydrophilicity–oleophobicity and the selective absorption of water from oil–water mixtures in a continuous manner make the polyHIPEs excellent candidates for the controlled removal of water from oil–water mixtures.

中文翻译：

可控制pH从油-水混合物中除去水的两亲性polyHIPEs，其pH触发转变为亲水性-疏油性

虽然具有pH控制的润湿行为的乳液模板多孔聚合物（polyHIPEs）有利于从油水混合物中去除油，但它们很容易被油堵塞，不适用于分离由少量水和少量水组成的混合物。大量的油。在这里，我们报道了通过高内相乳液通过同时进行溶液聚合和界面诱导聚合。用HCl溶液调节pH值后，polyHIPEs的两亲性转变为亲水性-疏油性，这使水能够被选择性地吸收并从油水混合物中分离出来，并且pH触发的转变以可控的方式实现了分离。此外，在由泵提供的外部压力下以连续的方式实现吸收。所得的亲水-疏油性polyHIPEs还从乳化的油-水混合物（乳液）中吸收了水。从两亲性到亲水性-疏油性的pH触发转变以及连续不断地从油水混合物中选择性吸收水，使得polyHIPEs成为控制从油水混合物中除去水的极佳候选者。

更新日期：2020-11-03

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