Chemical functionality of surfaces for the characteristic adsorption of melamine

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-10-25 DOI:10.1002/sia.7265

Mohit Tiwari, Sudip K. Pattanayek

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Abstract

The surface functionality leading to a high reversibility adsorption of melamine was determined. Four different silane coupling agents, namely, 3‐(tri‐methoxysilyl) propyl methacrylate (TMSPMA), n‐propyl tri‐methoxy‐silane (PTMS), 3‐(tri‐ethoxysilyl) propionitrile (TESPN), and tri‐methoxy‐(octadecyl) silane (OTMS) were taken for making chemical functionality methacrylate, short methyl, nitrile, and extended methyl group respectively. The adsorption behavior of melamine over the substrates with four functionalities was determined using quartz crystal microbalance (QCM). The adsorption kinetics and adsorption isotherms of the adsorption studies were analyzed. The initial adsorption rate depends on the hydrophobicity and roughness of the surfaces. However, the subsequent adsorption rate depends on the specific interaction. The data of equilibrium adsorbed mass at various equilibrium concentrations were fitted with the modified Brunauer–Emmett–Teller (BET) and Freundlich adsorption isotherms. The estimated model parameters were analyzed and compared with the reported parameters of the relevant systems. There is good agreement between our results and the reported results. In addition, very high adsorption with a very high binding constant was observed for the adsorption of melamine OTMS surface. On the other hand, high adsorption with an intermediate layer binding constant for the adsorption of melamine on the methacrylate surface was observed. Based on this, we propose using acrylate chemical functionality to develop molecularly imprinted polymer‐based melamine sensors.

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三聚氰胺特性吸附表面的化学功能

测定了导致三聚氰胺高可逆性吸附的表面官能团。采用3‐(三甲氧基硅基)甲基丙烯酸丙酯(TMSPMA)、正丙基三甲氧基硅烷(PTMS)、3‐(三乙氧基硅基)丙腈(TESPN)和三甲氧基十八烷基硅烷(OTMS)四种不同的硅烷偶联剂，分别制备了化学官能团甲基丙烯酸酯、短甲基、腈基和扩展甲基。用石英晶体微天平(QCM)测定了三聚氰胺在四种官能团底物上的吸附行为。分析了吸附动力学和吸附等温线。初始吸附速率取决于表面的疏水性和粗糙度。然而，随后的吸附速率取决于特定的相互作用。用改进的brunauer - emmet - teller (BET)吸附等温线和Freundlich吸附等温线拟合不同平衡浓度下的平衡吸附质量数据。对估计的模型参数进行了分析，并与相关系统的报告参数进行了比较。我们的结果和报道的结果吻合得很好。此外，三聚氰胺在OTMS表面的吸附具有很高的吸附常数。另一方面，对三聚氰胺在甲基丙烯酸酯表面的吸附具有较高的吸附性。在此基础上，我们提出利用丙烯酸酯化学功能开发分子印迹聚合物基三聚氰胺传感器。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.