Huang Charley, Huang Pan, Yang Wenshuai, Liu Jifang, Zeng Hongbo
Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9 Alberta, Canada.
Zhongyuan Critical Metal Laboratory, Zhengzhou 450001, China; The Key Lab of Critical Metals Minerals Supernormal Enrichment and Extraction, Ministry of Education, Zhengzhou, Henan 450001, China.
J Colloid Interface Sci. 2025 Dec;699(Pt 2):138197. doi: 10.1016/j.jcis.2025.138197. Epub 2025 Jun 14.
The fast and unregulated bio-inspired Schiff base and Michael addition reactions between phenol- and amino-based materials often lead to the formation of uneven coatings with large aggregates, affecting the coating efficiency and various designed functionalities. Therefore, a co-hydrolysis strategy was proposed to modulate the phenol/amino reaction and the self-assembly coating process, achieving uniform and compact phenol/amino-based antifouling coating.
A uniform bio-inspired antifouling coating was fabricated by modulating the Schiff base and Michael addition reactions between tannic acid with amino groups within the co-hydrolyzed amino, zwitterionic, and fluorine-containing silane system. The surface morphology and underlying molecular interaction mechanism was probed by atomic force microscopy (AFM). The wettability of the coating was tuned through optimization of the coating composition and its interfacial antifouling performance was evaluated using quartz crystal microbalance (QCM) and optical photothermal infrared (O-PTIR) spectroscopy. The separation efficiency of the coated polyvinylidene difluoride (PVDF) membrane for treating oil-in-water emulsions was assessed using dead-end filtration tests.
Molecular force measurements and antifouling test results showed that incorporating zwitterionic and fluorine-containing silane not only regulated the Schiff base and Michael addition reaction rates, enabling the formation of a uniform surface coating, but also provided a stable hydration layer and low-surface-energy sites to enhance the fouling resistance and fouling release properties of the prepared antifouling surfaces. The proposed coating can be extended for membrane surface functionalization, showing enhanced water flux (over 5700 L m h bar) and excellent separation performance of oil-in-water emulsions even in the presence of additional bio-foulants, with a flux recovery ratio over 90 %. This study proposes and validates a co-hydrolysis strategy that enables precise control over the structure and morphology of phenol/amino-based coating systems by modulating steric and hydration effects as well as electrostatic repulsion between reactive colloids. This strategy can be extended to other phenol/amino-based coating systems to modulate surface functionality and morphology through interfacial design.
基于苯酚和氨基的材料之间快速且不受调控的仿生席夫碱反应和迈克尔加成反应，常常会导致形成含有大聚集体的不均匀涂层，影响涂层效率和各种设计功能。因此，提出了一种共水解策略来调控苯酚/氨基反应和自组装涂层过程，从而实现均匀且致密的基于苯酚/氨基的防污涂层。
通过调控共水解的氨基、两性离子和含氟硅烷体系中没食子酸与氨基之间的席夫碱反应和迈克尔加成反应，制备了一种均匀的仿生防污涂层。通过原子力显微镜（AFM）探测表面形貌和潜在的分子相互作用机制。通过优化涂层组成来调节涂层的润湿性，并使用石英晶体微天平（QCM）和光热红外（O-PTIR）光谱评估其界面防污性能。使用死端过滤测试评估涂覆的聚偏氟乙烯（PVDF）膜处理水包油乳液的分离效率。
分子力测量和防污测试结果表明，引入两性离子和含氟硅烷不仅调控了席夫碱反应和迈克尔加成反应速率，使得能够形成均匀的表面涂层，还提供了稳定的水合层和低表面能位点，以增强所制备防污表面 的抗污性和污损释放性能。所提出的涂层可扩展用于膜表面功能化，即使在存在额外生物污垢的情况下，也显示出增强的水通量（超过5700 L m h bar）和优异的水包油乳液分离性能，通量恢复率超过90%。本研究提出并验证了一种共水解策略，该策略能够通过调节空间位阻和水合效应以及反应性胶体之间的静电排斥，精确控制基于苯酚/氨基的涂层体系的结构和形貌。该策略可扩展到其他基于苯酚/氨基的涂层体系，以通过界面设计调节表面功能和形貌。
