Preparation of Magnetic Porous Microspheres and Their Ability to Remove Oils,Macromolecular Materials and Engineering

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Preparation of Magnetic Porous Microspheres and Their Ability to Remove Oils
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2019-12-12 , DOI: 10.1002/mame.201900452
Ya‐Lan Yu _{1,

2} , Zi‐Han Zhou ₁ , Wan‐Ting Yu ₁ , Yu‐Zhen Song ₁ , Min‐Qian Xie ₁

Affiliation

Magnetic, porous poly (tripropylene glycol diacrylate) (PTPGDA) microspheres are successfully prepared using a combination of microfluidic emulsification and free‐radical polymerization. The porous structure can be precisely controlled by controlling the amount of the oil‐phase emulsifier polyglycerol polyricinoleate (PGPR). The effects of PGPR content and pH on the contact angle of the microspheres is investigated. The contact angle of the microspheres increases with the raise of PGPR content, and the hydrophobicity of the microspheres remains stable at different pHs. The microstructure, magnetic properties, and oil adsorption abilities of the microspheres are also studied. The as‐prepared microspheres perform adsorption well, the higher the PGPR content, the more pore structures and larger contact angle occurres on the microspheres, which improves the adsorption capacity. In addition, the adsorption capacity of the microspheres for diesel can reach 3.38 g·g⁻¹ when the mass fraction of PGPR in oil phase is 50% w/v. After adsorbing oil, the microspheres can be separated, recovered, and reused by applying an external magnetic field. The magnetic microspheres have good oil adsorption abilities and recyclability, which shows their potential for use in oil removal.

中文翻译：

磁性多孔微球的制备及其除油能力

磁性多孔聚（三丙二醇二丙烯酸三丙二醇酯）（PTPGDA）微球是通过微流乳化和自由基聚合相结合而成功制备的。通过控制油相乳化剂聚甘油聚蓖麻油酸酯（PGPR）的量可以精确控制多孔结构。研究了PGPR含量和pH值对微球接触角的影响。微球的接触角随PGPR含量的增加而增加，并且微球的疏水性在不同的pH值下保持稳定。还研究了微球的微观结构，磁性和吸油能力。制备的微球吸附性能良好，PGPR含量越高，微球上出现的孔结构越多，接触角越大，从而提高了吸附能力。另外，微球对柴油的吸附能力可以达到3.38 g·g。当油相中PGPR的质量分数为50％w / v时为^-1。吸附油后，可通过施加外部磁场将微球分离，回收和再利用。磁性微球具有良好的吸油能力和可回收性，显示出其在除油中的潜力。

更新日期：2020-01-15

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