Novel hydrogen-bonded organic frameworks-based coating for fat oil and grease deposition control in the sewer system

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-10-23 DOI:10.1016/j.porgcoat.2024.108867

Sachin Yadav, Anika Amir Mohana, Sagor Kumar Pramanik, Biplob Kumar Pramanik

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引用次数: 0

Abstract

Hydrogen-bonded organic frameworks (HOFs) represent an emerging class of porous materials characterized by crystalline frame structures, self-assembled from organic molecules through hydrogen bonding. This study demonstrates that HOFs fragment into small particles while preserving their original structure when dispersed in a polymeric epoxy solution. The intermolecular hydrogen bond structural and electronic properties of the LH₄-HOF complex as well as the mechanism of HOF incorporated epoxy were extensively studied using density functional theory. LH₄-HOF has a high Langmuir surface area of 2758.3 m²/g and nonlocal density functional theory pore size distributions of 3 A°. This unique solution processability enables the fabrication of coatings with high stability in aqueous systems. Results from a 30-day leaching test under controlled conditions (pH 7, temperature 20 ± 2 °C) indicate that LH₄-HOF incorporated epoxy-coated concrete samples exhibited an over 85 % reduction in calcium release compared to uncoated samples, with epoxy-coated samples alone showing a 60 % reduction in calcium leaching. Additionally, the LH₄-HOF-incorporated epoxy coating reduced the formation of fats, oils and grease deposits by more than 73 % on the concrete samples. Thus, this novel coating approach offers a sustainable solution with significant potential applications in sewer management.

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基于氢键有机框架的新型下水道油脂沉积控制涂层

氢键有机框架（HOFs）是一类新兴的多孔材料，具有结晶框架结构，由有机分子通过氢键自组装而成。本研究证明，当 HOFs 分散在聚合物环氧溶液中时，可碎裂成小颗粒，同时保持其原始结构。利用密度泛函理论对 LH4-HOF 复合物的分子间氢键结构和电子特性以及 HOF 与环氧树脂结合的机理进行了广泛研究。LH4-HOF 的朗缪尔表面积高达 2758.3 m2/g，非局部密度泛函理论孔径分布为 3 A°。这种独特的溶液加工性使得涂层在水性体系中具有很高的稳定性。在受控条件（pH 值为 7，温度为 20 ± 2 °C）下进行的为期 30 天的浸出试验结果表明，与未涂覆样品相比，掺入 LH4-HOF 的环氧树脂涂覆混凝土样品的钙释放量减少了 85%，而单独涂覆环氧树脂的样品的钙浸出量减少了 60%。此外，掺入 LH4-HOF 的环氧涂层还能将混凝土样品上形成的油脂沉积物减少 73% 以上。因此，这种新型涂层方法提供了一种可持续的解决方案，在下水道管理方面具有巨大的应用潜力。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.