Preparation of Hydrophobic Monolithic Supermacroporous Cryogel Particles for the Separation of Stabilized Oil-in-Water Emulsion
Preparation of Hydrophobic Monolithic Supermacroporous Cryogel Particles for the Separation of Stabilized Oil-in-Water Emulsion
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DOI：
10.3390/colloids7010009
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发表时间：
2023-01
影响因子：
2.4
通讯作者：
Hayato Takase;N. Watanabe;K. Shiomori;Y. Okamoto;E. Ciptawati;H. Matsune;H. Umakoshi
中科院分区：
文献类型：
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作者：
Hayato Takase;N. Watanabe;K. Shiomori;Y. Okamoto;E. Ciptawati;H. Matsune;H. Umakoshi
在这里，我们通过结合逆莱顿弗罗斯特效应和冷冻聚合技术，制备了基于聚三羟甲基丙烷三甲基丙烯酸酯（pTrim）的具有整体式超大孔的疏水性冷冻凝胶颗粒。采用该方法制备的疏水性冷冻凝胶颗粒证明了稳定的O/W乳液与表面活性剂的分离。对所制备的冷冻凝胶颗粒的宏观形状和多孔结构进行了表征。研究发现，冷冻凝胶颗粒具有窄的尺寸分布和整体式超大孔结构。通过将水性和有机液滴置于颗粒上来确认冷冻凝胶颗粒的疏水性。当有机液滴立即被吸附到颗粒中时，水滴由于排斥力而保留在颗粒的表面上。另外，在吸附有机液滴后观察粒子，有机溶剂扩散到整个粒子中。结果表明，整体孔隙由表面向内部分布。关于疏水性冷冻凝胶颗粒的应用，我们演示了稳定的水包油乳液的分离，从而成功地从乳液中去除有机溶剂。
Here, we prepared hydrophobic cryogel particles with monolithic supermacropores based on poly-trimethylolpropane trimethacrylate (pTrim) by combining the inverse Leidenfrost effect and cryo-polymerization technique. The hydrophobic cryogel particles prepared by adopting this method demonstrated the separation of the stabilized O/W emulsion with surfactant. The prepared cryogel particles were characterized in terms of macroscopic shape and porous structure. It was found that the cryogel particles had a narrow size distribution and a monolithic supermacroporous structure. The hydrophobicity of the cryogel particles was confirmed by placing aqueous and organic droplets on the particles. Where the organic droplet was immediately adsorbed into the particles, the aqueous droplet remained on the surface of the particle due to repelling force. In addition, after it adsorbed the organic droplet the particle was observed, and the organic solvent was diffused into the entire particle. It was indicated that monolithic pores were distributed from the surface to the interior. Regarding the application of the hydrophobic cryogel particles, we demonstrated the separation of a stabilized oil-in-water emulsion, resulting in the successful removal of the organic solvent from the emulsion.