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Constructing Superhydrophobicity by Self-Assembly of SiO2@Polydopamine Core-Shell Nanospheres with Robust Oil-Water Separation Efficiency and Anti-Corrosion Performance
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-01-31 , DOI: 10.1002/adfm.202213042 Zhen Shi 1 , Hang Zeng 1 , Yusheng Yuan 1 , Nan Shi 1 , Lin Wen 1 , Huawei Rong 1 , Dapeng Zhu 1 , Liang Hu 1 , Lianze Ji 1 , Lizhong Zhao 1 , Xuefeng Zhang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-01-31 , DOI: 10.1002/adfm.202213042 Zhen Shi 1 , Hang Zeng 1 , Yusheng Yuan 1 , Nan Shi 1 , Lin Wen 1 , Huawei Rong 1 , Dapeng Zhu 1 , Liang Hu 1 , Lianze Ji 1 , Lizhong Zhao 1 , Xuefeng Zhang 1
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Vulnerable robustness of superhydrophobic materials have mightily hindered their practical applications. Herein, a controllable and effective strategy is demonstrated for constructing robust superhydrophobicity with aqueous hydrophobic interaction driving self-assembly (HIDS), using polydopamine (PDA) as the binder and SiO2 particles as the nano-sized structures to enable low-adhesive property. The proposed strategy realizes the rapid interfacial assembly of PDA by manipulating the wetting properties of SiO2@PDA core-shell particles with hydrophobic modifier. The polyurethane (PU) sponges are facilely rendered superhydrophobic with remarkable robustness, stemming from the excellent adherence of HIDS enhanced covalent interaction between PDA and PU. Coated sponge possesses ultralong-term stability during the oil-water separation, the separation efficiency can be maintained at 98.8% even after 1000 cycle separations and strikingly, superhydrophobicity is still retained after 100 cycle abrasion with ultrahigh loading pressure of 49 kPa. Versatilely, the coatings can be assembled on various substrates through scalable dip coating for attaining superhydrophobicity, regardless of size, roughness, chemistry, and rigidity. The complete water-repellent coatings on permanent magnet of Nd-Fe-B hold excellent anti-corrosion properties without deteriorating the magnetic properties, exhibiting a low corrosion current density of 2.03 × 10−8 A cm−2, which is three orders of magnitude lower than that of 1.30 × 10−5 A cm−2 for bare Nd-Fe-B magnet.
中文翻译：
通过自组装 SiO2@聚多巴胺核壳纳米球构建具有强大油水分离效率和抗腐蚀性能的超疏水性
超疏水材料脆弱的坚固性极大地阻碍了它们的实际应用。在此，展示了一种可控且有效的策略，通过使用聚多巴胺 (PDA) 作为粘合剂和 SiO 2颗粒作为纳米尺寸结构来实现低粘附性，通过水性疏水相互作用驱动自组装 (HIDS) 构建稳健的超疏水性。所提出的策略通过控制 SiO 2的润湿特性实现了 PDA 的快速界面组装@PDA 具有疏水改性剂的核壳颗粒。聚氨酯 (PU) 海绵很容易呈现超疏水性，具有显着的坚固性，这源于 HIDS 的出色粘附增强了 PDA 和 PU 之间的共价相互作用。涂层海绵在油水分离过程中具有超长的稳定性，即使经过 1000 次循环分离后分离效率仍可保持在 98.8%，并且在 49 kPa 的超高负载压力下经过 100 次循环磨损后仍保持超疏水性。多功能地，可以通过可扩展的浸涂将涂层组装在各种基材上，以实现超疏水性，而不管尺寸、粗糙度、化学性质和刚度如何。−8 A cm -2 ，比裸Nd-Fe-B磁体的1.30×10 -5 A cm -2低三个数量级。
更新日期：2023-01-31
中文翻译：
通过自组装 SiO2@聚多巴胺核壳纳米球构建具有强大油水分离效率和抗腐蚀性能的超疏水性
超疏水材料脆弱的坚固性极大地阻碍了它们的实际应用。在此，展示了一种可控且有效的策略，通过使用聚多巴胺 (PDA) 作为粘合剂和 SiO 2颗粒作为纳米尺寸结构来实现低粘附性，通过水性疏水相互作用驱动自组装 (HIDS) 构建稳健的超疏水性。所提出的策略通过控制 SiO 2的润湿特性实现了 PDA 的快速界面组装@PDA 具有疏水改性剂的核壳颗粒。聚氨酯 (PU) 海绵很容易呈现超疏水性，具有显着的坚固性，这源于 HIDS 的出色粘附增强了 PDA 和 PU 之间的共价相互作用。涂层海绵在油水分离过程中具有超长的稳定性，即使经过 1000 次循环分离后分离效率仍可保持在 98.8%，并且在 49 kPa 的超高负载压力下经过 100 次循环磨损后仍保持超疏水性。多功能地，可以通过可扩展的浸涂将涂层组装在各种基材上，以实现超疏水性，而不管尺寸、粗糙度、化学性质和刚度如何。−8 A cm -2 ，比裸Nd-Fe-B磁体的1.30×10 -5 A cm -2低三个数量级。
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