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首页> 美国卫生研究院文献>Polymers >Coordination-Driven Controlled Assembly of Polyphenol-Metal Green Coating on Wood Micro-Grooved Surfaces: A Novel Approach to Stable Superhydrophobicity
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Coordination-Driven Controlled Assembly of Polyphenol-Metal Green Coating on Wood Micro-Grooved Surfaces: A Novel Approach to Stable Superhydrophobicity

机译：木材微沟槽表面上多酚金属绿色涂料的配位驱动受控组装：稳定超疏水性的​​新方法

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A versatile, fast, and nature-inspired polyphenol chemistry surface modification was applied to prepare superhydrophobic surfaces with micro-grooved structures in this study. Tannic acid and iron ion (TA–FeIII) complexes were employed as a molecular building block for anchoring biomimetic coating onto the wood substrate with catalytically reducing formative Ag ions as the rough surface to ensure well-developed microanostructure hierarchical roughness. TA–FeIII complexes also acted as stable bridges between the substrate and hydrophobic groups. The thickness and architecture of TA–FeIII complex coatings can be tailored by coordination-driven multistep assembly. The results indicated that the microano hierarchical roughness structure was well-developed with increased coating times and increased deposition of reduced Ag nanoparticles, resulting in excellent superhydrophobic properties (e.g., water CA (contact angle) of about 156° and a rolling angle of about 4°). The superhydrophobic material exhibited outstanding stability and durability in harsh conditions, including strong acid/base or organic solvent, high-temperature water boiling, ultrasonic cleaning, and ultraviolet aging. A series of superhydrophobic models are proposed to clarify the effect of the microano hierarchical structure on these superhydrophobic properties.
机译：在这项研究中，将一种通用，快速且受自然启发的多酚化学表面改性技术用于制备具有微沟槽结构的超疏水表面。单宁酸和铁离子（TA–Fe III ）配合物被用作分子构件，将仿生涂层锚固在木质基材上，并催化还原形成的Ag离子作为粗糙表面，以确保精细发育的微结构。 /纳米结构分层粗糙度。 TA–Fe III 配合物还充当底物和疏水基团之间的稳定桥梁。 TA-Fe III 复杂涂层的厚度和结构可以通过协调驱动的多步装配进行定制。结果表明，随着涂层时间的增加和还原性Ag纳米颗粒的沉积增加，微/纳米分层粗糙度结构得到了很好的发展，从而产生了优异的超疏水性能（例如，水CA（接触角）约为156°，滚动角为）。约4°）。该超疏水材料在苛刻的条件下表现出出色的稳定性和耐久性，包括强酸/碱或有机溶剂，高温水煮沸，超声清洗和紫外线老化。提出了一系列超疏水模型来阐明微/纳米分层结构对这些超疏水特性的影响。

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