Temporal variations of surface roughness and thickness of polymer-coated quartz sand

IF 2.3 4区材料科学 Q2 Chemistry

Journal of Coatings Technology and Research Pub Date : 2023-07-10 DOI:10.1007/s11998-023-00798-z

Yunesh Saulick, Hong-Wei Yang, Sérgio D. N. Lourenço

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引用次数: 0

Abstract

In this work, the changes in surface roughness and thickness of particles have been investigated after coating with polymers that result in hydrophobicity after a given time period. The study fundamentally investigates the evolution of these surface properties from the instant the particles are coated. Six chemical agents have been used on near-spherical glass beads and the changes in surface profiles monitored. Surface roughness was quantified using the power spectral density method and the surface thickness of the coatings was determined by a new technique which involved calculating the change in the representative radius of asperity. Results showed that the coating process altered the surface roughness and thickness of particles irrespective of chemicals used. The time-dependency of the coating process is illustrated and it was observed that fluctuations in both surface roughness and thickness lessened after a time period of 30 min. Depending on the chemical agent used, either an overall roughening or softening was recorded at 60 min and the values of surface thickness showed increases between 71 and 256 nm. By analyzing the evolution of surface roughness and thickness at the particle level following coating, this study demonstrated the intricate link between surface properties and chemistry in inducing functional properties on particles.

Graphical Abstract

Abstract Image

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聚合物包覆石英砂表面粗糙度和厚度的时间变化

在这项工作中，研究了聚合物涂层后颗粒表面粗糙度和厚度的变化，这些聚合物在给定的时间内产生疏水性。这项研究从根本上调查了这些表面特性从颗粒被涂覆的瞬间开始的演变。在近球形玻璃微珠上使用了6种化学药剂，并监测了表面轮廓的变化。采用功率谱密度法对表面粗糙度进行量化，采用计算粗糙度代表半径变化量的新方法确定涂层的表面厚度。结果表明，涂层过程改变了颗粒的表面粗糙度和厚度，而与使用的化学物质无关。说明了涂层过程的时间依赖性，并观察到表面粗糙度和厚度的波动在30分钟后减小。根据所使用的化学剂，在60分钟时记录了整体粗化或软化，表面厚度值显示在71至256 nm之间增加。通过分析涂层后颗粒级表面粗糙度和厚度的变化，本研究揭示了表面性能和化学在诱导颗粒功能特性方面的复杂联系。图形抽象

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来源期刊

Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS

CiteScore

4.40

自引率

8.70%

发文量

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.