Microwave-functionalized natural tannic acid as an anticorrosive UV-curable coating

IF 4.1 2区化学 Q2 POLYMER SCIENCE Polymer Pub Date : 2024-11-12 DOI:10.1016/j.polymer.2024.127824

Rossella Sesia , Paula Pou I Rodríguez , Massimo Calovi , Minna Hakkarainen , Stefano Rossi , Sara Ferraris , Silvia Spriano , Marco Sangermano

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Abstract

Corrosion causes serious steel deterioration with consequent negative impacts on the environment and economy. Organic coatings are widely exploited to provide corrosion protection on low-carbon steel. However, the raw materials and preparation methods for common anticorrosive coatings are not sustainable. In this framework, the efficient microwave-assisted methacrylation of a natural polyphenolic compound, tannic acid (TA), provided a UV-curable monomer with a high degree of substitution. The produced methacrylated tannic acid (MTA) was characterized by means of ³¹P NMR and FTIR spectroscopies. The UV-curing of MTA by radical photopolymerization was deeply investigated via the real-time FTIR, photo-DSC, and photo-rheological analyses, confirming the high photo-reactivity of MTA with a conversion of 80 % and a gel point at 2.5 s. The UV-cured MTA showed good thermal stability and a glass transition temperature (T_g) of 133 °C. Furthermore, UV-cured MTA coating exhibited high hardness and hydrophobicity. The zeta potential measurement indicated a negatively charged surface with an isoelectric point (IEP) at pH 2.7. Finally, the good corrosion protection performance of UV-cured MTA coating on plasma pre-treated steel surface was assessed through electrochemical impedance spectroscopy.

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微波官能化天然单宁酸作为紫外线固化防腐涂料

腐蚀会导致钢材严重老化，从而对环境和经济产生负面影响。有机涂层被广泛用于为低碳钢提供防腐保护。然而，普通防腐涂料的原材料和制备方法都不是可持续的。在此框架下，对天然多酚化合物单宁酸（TA）进行高效的微波辅助甲基丙烯酸化，提供了一种具有高取代度的紫外线固化单体。通过 31P NMR 和傅立叶变换红外光谱对生成的甲基丙烯酸单宁酸（MTA）进行了表征。通过实时傅立叶变换红外光谱（FTIR）、光致变量-电化学（DSC）和光流变学分析对自由基光聚合法紫外固化 MTA 进行了深入研究，结果表明 MTA 具有很高的光活性，转化率达 80%，凝胶点为 2.5 秒。此外，紫外固化 MTA 涂层还具有高硬度和疏水性。zeta 电位测量结果表明，涂层表面带负电，等电点（IEP）为 pH 值 2.7。最后，通过电化学阻抗光谱评估了等离子预处理钢表面紫外固化 MTA 涂层的良好腐蚀保护性能。

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.