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在应用于钢表面的紫外光固化涂料中，通过化学改性氧化铝提高耐腐蚀性。

Enhancing corrosion resistance with chemically modified aluminum oxide in UV-curable coatings applied to steel surfaces.

作者信息

Attia M, Mohamed Mahmoud Basseem I, Hegazy M A, Ghobashy M M, El-Wahab H Abd, Abdelhai F

机构信息

Chemistry Department, Faculty of Science, Al-Azhar University, P.O. 11884, Nasr City, Cairo, Egypt.

Petrochemicals Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, 11727, Egypt.

出版信息

Sci Rep. 2025 May 14;15(1):16720. doi: 10.1038/s41598-025-99898-6.

DOI:10.1038/s41598-025-99898-6
PMID:40369035
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12078604/
Abstract

This study introduces a novel, environmentally sustainable epoxidized soybean oil acrylate (ESOA) nanocomposite coating containing nAlO-silane nanoparticles (ESOA@TMPTA-nAlO-Silane), which was fabricated using ultraviolet (UV) curing technology. As far as we know, this is the first study to incorporate aluminum oxide nanoparticles (nAlO) modified through covalent bonding with a reactive diluent monomer, tripropylene glycol diacrylate (TPGDA), and a coupling agent to enhance their dispersibility and interaction within the polymer matrix. Comprehensive characterization techniques, including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), UV-spectroscopy, energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM), confirmed the nanocomposite's structural and polymer morphological enhancements. Electrochemical impedance spectroscopy (EIS) demonstrated a substantial increase in polarization resistance (R), rising from 25.6 kΩ cm for the unmodified polymer to 288.7 kΩ cm upon the incorporation of (8 wt%) nAlO-Silane. In a similar vein, Potentiodynamic polarization (PDP) exhibited a significant decrease in corrosion current density (i), diminishing from 0.82 to 0.059 µA/cm, thereby achieving an inhibition efficiency exceeding 99%. Additionally, the salt spray test data showed a considerable improvement in the rust degree from 3 to 8G under identical conditions. The data demonstrates the outstanding corrosion resistance characteristics that the nAlO-Silane nanoparticles provided when coupled with the steel substrate. This improvement is attributed to the excellent dispersion, excellent barrier properties, transparency of the resulting coatings and strong adhesion of nAlO-Silane dispersed in the polymer matrix.

摘要

本研究介绍了一种新型的、环境可持续的环氧大豆油丙烯酸酯（ESOA）纳米复合涂层，该涂层包含nAlO-硅烷纳米颗粒（ESOA@TMPTA-nAlO-硅烷），采用紫外（UV）固化技术制备。据我们所知，这是第一项将通过与反应性稀释单体三丙二醇二丙烯酸酯（TPGDA）和偶联剂进行共价键改性的氧化铝纳米颗粒（nAlO）纳入其中，以增强其在聚合物基体中的分散性和相互作用的研究。综合表征技术，包括傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、原子力显微镜（AFM）、X射线衍射（XRD）、紫外光谱、能量色散X射线光谱（EDX）和透射电子显微镜（TEM），证实了纳米复合材料的结构和聚合物形态得到了增强。电化学阻抗谱（EIS）表明极化电阻（R）大幅增加，从未改性聚合物的25.6 kΩ·cm增加到加入（8 wt%）nAlO-硅烷后的288.7 kΩ·cm。同样，动电位极化（PDP）显示腐蚀电流密度（i）显著降低，从0.82降至0.059 μA/cm，从而实现了超过99%的抑制效率。此外，盐雾试验数据表明，在相同条件下，锈蚀程度从3级显著提高到8G级。数据表明，nAlO-硅烷纳米颗粒与钢基材结合时具有出色的耐腐蚀特性。这种改进归因于nAlO-硅烷在聚合物基体中的优异分散性、优异的阻隔性能、涂层的透明度以及强附着力。

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