Abstract Fluoropolymers are very important owing to their excellent application performances, especially in extreme conditions. On the other hand, the preparation of porous fluoropolymers is a difficult task due to unavailability of suitable surfactants as well as tedious synthesis steps. Here we prepared multifunctional porous fluoropolymer composite foams with a simple process of “high internal phase emulsion (HIPE)” by using humic acid modified iron oxide nanoparticles (HA-Fe3O4 NPs) and cationic fluorosurfactant (CFS) (PDMAEMA-b-PHFBA) as co-stabilizer. The inclusion of HA-Fe3O4 NPs in the system made fluoro-HIPE more stable than the emulsion prepared using only CFS or other conventional stabilizers. Morphology of the prepared polyHIPE was easily controlled by altering the concentration of HA-Fe3O4 and/or CFS in the original formulation. Adjustment of the porous structure with open/close cells was performed and the average diameter of the pores tuned between 4.9 and 23 μm. With the increase in specific surface area by using nanoparticles (NPs) and CFS as co-surfactants, Pickering HIPE monoliths adsorbed double amount of oil compared to foams based solely on HIPE template. Multiple functional groups were bound onto Fe3O4 NPs through HA modification that made the fluoro-monolith capable of adsorbing dye, i.e. methylene blue, from water. A simple centrifugation enabled regeneration of the oil soaked foams and adsorption capacity was not decreased after 10 adsorption/regeneration cycles.

中文翻译：

---

以阳离子含氟表面活性剂为助稳定剂的腐植酸改性Fe 3 O 4 纳米颗粒稳定Pickering高内相乳液制备多孔多功能含氟聚合物复合泡沫

摘要 含氟聚合物由于其优异的应用性能，特别是在极端条件下的应用性能非常重要。另一方面，由于没有合适的表面活性剂以及繁琐的合成步骤，多孔含氟聚合物的制备是一项艰巨的任务。在这里，我们使用腐植酸改性氧化铁纳米粒子（HA-Fe3O4 NPs）和阳离子含氟表面活性剂（CFS）（PDMAEMA-b-PHFBA）作为“高内相乳液（HIPE）”的简单工艺制备多功能多孔含氟聚合物复合泡沫。助稳定剂。系统中包含 HA-Fe3O4 NPs 使氟-HIPE 比仅使用 CFS 或其他常规稳定剂制备的乳液更稳定。通过改变原始配方中 HA-Fe3O4 和/或 CFS 的浓度，可以轻松控制制备的 polyHIPE 的形态。使用开/关单元调整多孔结构，并将孔的平均直径调整在 4.9 到 23 μm 之间。随着通过使用纳米颗粒 (NPs) 和 CFS 作为辅助表面活性剂增加比表面积，与仅基于 HIPE 模板的泡沫相比，Pickering HIPE 整料吸附了双倍的油量。多个官能团通过 HA 改性结合到 Fe3O4 NPs 上，使氟单体能够从水中吸附染料，即亚甲蓝。简单的离心使油浸泡沫能够再生，并且在 10 次吸附/再生循环后吸附能力没有降低。随着通过使用纳米颗粒 (NPs) 和 CFS 作为辅助表面活性剂增加比表面积，与仅基于 HIPE 模板的泡沫相比，Pickering HIPE 整料吸附了双倍的油量。多个官能团通过 HA 改性结合到 Fe3O4 NPs 上，使氟单体能够从水中吸附染料，即亚甲蓝。简单的离心使油浸泡沫能够再生，并且在 10 次吸附/再生循环后吸附能力没有降低。随着通过使用纳米颗粒 (NPs) 和 CFS 作为辅助表面活性剂增加比表面积，与仅基于 HIPE 模板的泡沫相比，Pickering HIPE 整料吸附了双倍的油量。多个官能团通过 HA 改性结合到 Fe3O4 NPs 上，使氟单体能够从水中吸附染料，即亚甲蓝。简单的离心使油浸泡沫能够再生，并且在 10 次吸附/再生循环后吸附能力没有降低。