Hydrophilicity and Hydrophobicity Control of Plasma-Treated Surfaces via Fractal Parameters,Advanced Materials Interfaces

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Hydrophilicity and Hydrophobicity Control of Plasma-Treated Surfaces via Fractal Parameters
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2021-09-13 , DOI: 10.1002/admi.202100724
Cecilia Piferi ₁ , Kateryna Bazaka _{2,

3,

4} , Debora L. D'Aversa ₁ , Rocco Di Girolamo ₅ , Claudio De Rosa ₅ , H. Eduardo Roman ₁ , Claudia Riccardi ₁ , Igor Levchenko ₃

Affiliation

It is still problematic to define a direct relationship between specific properties of a nanostructured surface (e.g., wettability) and its morphology. Not surprisingly, scientists continue to explore en masse the cut-and-try method. In this work, new insights are presented into the correlation of functional properties of the complex nanocomposites with their morphological characteristics. Using polyethylene-terephthalate (PET) as a model material due to its importance and wide use in experiments, super-hydrophilic nanocomposites amenable to be used in a variety of industrial applications are first developed, by exposing PET samples to oxygen plasma under controlled conditions. The morphology of the surfaces is confirmed using AFM and SEM techniques, and wettability in air and its oleophobic properties in water using contact angle and roll-off measurements. Next, different analytical tools such as Minkowski connectivity (Euler-Poincaré characteristic), Hough distributions and 2D FFT are applied to study ordering, connectivity, and fractal characteristics of the samples. It is concluded that fractal dimension, along with ordering and connectivity, are among the major characteristics of the nanocomposite that determine many important physical and chemical properties of the functional nanomaterials, and the fractal dimension could be a target morphological feature to inform the design of fabrication technology.

中文翻译：

通过分形参数控制等离子处理表面的亲水性和疏水性

定义纳米结构表面的特定性质（例如润湿性）与其形态之间的直接关系仍然是有问题的。毫不奇怪，科学家们继续集体探索切入即试的方法。在这项工作中，对复杂纳米复合材料的功能特性与其形态特征的相关性提出了新的见解。由于聚对苯二甲酸乙二醇酯 (PET) 在实验中的重要性和广泛应用，使用聚对苯二甲酸乙二醇酯 (PET) 作为模型材料，通过在受控条件下将 PET 样品暴露于氧等离子体，首先开发了适用于各种工业应用的超亲水纳米复合材料。使用 AFM 和 SEM 技术确认表面的形态，和空气中的润湿性及其在水中的疏油性能使用接触角和滚降测量。接下来，应用不同的分析工具，例如 Minkowski 连通性（欧拉-庞加莱特征）、霍夫分布和 2D FFT 来研究样本的排序、连通性和分形特征。得出的结论是，分形维数以及有序性和连通性是纳米复合材料的主要特征之一，决定了功能纳米材料的许多重要物理和化学性质，分形维数可以作为目标形态特征来指导制造设计技术。和样品的分形特征。得出的结论是，分形维数以及有序性和连通性是纳米复合材料的主要特征之一，决定了功能纳米材料的许多重要物理和化学性质，分形维数可以作为目标形态特征来指导制造设计技术。和样品的分形特征。得出的结论是，分形维数以及有序性和连通性是纳米复合材料的主要特征之一，决定了功能纳米材料的许多重要物理和化学性质，分形维数可以作为目标形态特征来指导制造设计技术。

更新日期：2021-10-08

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