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Facile Preparation of a Fluorine‐Free, Robust, Superhydrophobic Coating through Dip Coating Combined with Non‐Solvent Induced Phase Separation (Dip‐Coating‐NIPS) Method
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-03-03 , DOI: 10.1002/macp.202000023
Yuwei Zhu 1 , Lei Pei 2 , Jaweria Ambreen 3 , Chuanxin He 2 , To Ngai 1
Affiliation  

Superhydrophobic surfaces based on non‐fluorinated materials and facile fabrication techniques are of great practical value with respect to environmental friendliness and industrial applications. In this work, a fluorine‐free, superhydrophobic coating with hierarchical surface structure and low surface energy is successfully fabricated on various substrates through a recently developed dip coating combined with non‐solvent induced phase separation (dip‐coating‐NIPS) method. A bio‐based polymer, poly(l‐lactic acid), and commercially available hydrophobic SiO2 nanoparticles, are used. The fabricated coating exhibits superhydrophobicity, with a static water contact angle (WCA) of 155.7° ± 1.4° and contact angle hysteresis (θHys) of 5.2° ± 0.4°. The results from stability tests demonstrate excellent mechanical durability and chemical stability of the superhydrophobic coating. Finally, the fabricated coating is successfully applied in water–oil separation with superior efficiency. This simple, cost‐effective, and time‐efficient method may provide an effective way for the design of nonfluorine‐based environmentally friendly membranes for separation applications.

中文翻译:

通过浸涂结合非溶剂诱导相分离(Dip-Coating-NIPS)方法轻松制备无氟,坚固,超疏水涂层

基于非氟化材料和便捷的制造技术的超疏水表面在环境友好性和工业应用方面具有巨大的实用价值。在这项工作中,通过最近开发的浸涂结合非溶剂诱导的相分离(浸涂-NIPS)方法,成功地在各种基材上制造了具有分层表面结构和低表面能的无氟超疏水涂层。生物基聚合物,聚(-乳酸),和可商购的疏水性的SiO 2纳米粒子,被使用。制成的涂料具有超疏水性,静态水接触角(WCA)为155.7°±1.4°,接触角滞后(θHys)为5.2°±0.4°。稳定性测试的结果表明,超疏水涂层具有出色的机械耐久性和化学稳定性。最后,人造涂层成功地以优异的效率应用于水油分离。这种简单,经济高效且省时的方法可能为分离应用中基于非氟的环保膜的设计提供有效途径。
更新日期:2020-03-03
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