Fabrication of High-Speed Microswimmers by Spray Drying Technology for Oil Removal,Industrial & Engineering Chemistry Research

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Fabrication of High-Speed Microswimmers by Spray Drying Technology for Oil Removal
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-09-13 , DOI: 10.1021/acs.iecr.4c02865
Rong-Kun Liu _{1,

2} , Jia Jia _{1,

2} , Qian Sun ₃ , Hong Zhao ₂ , Jie-Xin Wang _{1,

2}

Affiliation

Janus-microswimmers, as efficient self-propelled materials, have garnered considerable attention, particularly for their potential applications in nonagitated liquids, like natural aquatic systems. However, current microswimmers face challenges such as unconfined diffusion areas and small-scale production. Herein, we propose a scalable spray-drying-assisted strategy for the efficient production of Janus-microswimmers. The Janus structures are fabricated by the assembly of polystyrene microparticles and SiO₂/polydopamine nanoparticles in the microdroplets, and the single-side propulsion microswimmers are subsequently obtained by loading MnO₂. By catalyzing the decomposition of H₂O₂ to produce oxygen, the speed of these microswimmers is much faster than those of other reported continuous-motion microswimmers. Interestingly, the microswimmers are self-propelled and gather in the proximity of water surface, and the extent of the confined area is controllable. This range-confined motion, distinct from the traditional irregular motion, offers a novel perspective on the behavioral patterns of Janus-microswimmers. Furthermore, by in situ loading of Fe₃O₄ nanoparticles, the microswimmers can be sensitively induced and controlled in their movement direction by a magnetic field. As a proof-of-concept, by harnessing the hydrophobic components of the microswimmers, we successfully recover floating oil films in a simulated natural water body, offering a promising approach for the remediation of petroleum pollution in the environment.

中文翻译：

利用喷雾干燥除油技术制造高速微型游泳器

Janus-微型游泳器作为高效的自推进材料，引起了相当大的关注，特别是它们在非搅拌液体（如天然水生系统）中的潜在应用。然而，目前的微型游泳器面临扩散区域无限制、生产规模小等挑战。在此，我们提出了一种可扩展的喷雾干燥辅助策略，用于高效生产 Janus-microswimmers。 Janus结构是通过聚苯乙烯微粒和SiO ₂ /聚多巴胺纳米粒子在微滴中组装而成，随后通过负载MnO ₂获得单侧推进微游泳器。通过催化H ₂ O ₂分解产生氧气，这些微型游泳器的速度比其他报道的连续运动微型游泳器快得多。有趣的是，微型游泳器是自行推进的，聚集在水面附近，并且受限区域的范围是可控的。这种范围受限的运动与传统的不规则运动不同，为研究 Janus 微型游泳者的行为模式提供了新的视角。此外，通过原位负载Fe ₃ O ₄纳米颗粒，可以通过磁场灵敏地诱导和控制微型游泳器的运动方向。作为概念验证，通过利用微型游泳器的疏水成分，我们成功地在模拟天然水体中恢复了漂浮的油膜，为修复环境中的石油污染提供了一种有前途的方法。

更新日期：2024-09-13

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