Globular structured oleo alkyds possess low viscosity, good fluidity, and play an important role in the generation of volatile organic compound (VOC) free paints and coatings. Soya oil (SO), an abundant, inexpensive, renewable, and sustainable material is one of the examples of such oleo alkyd precursors that meets the requirement of green chemistry. The present work reports the synthesis of hyperbranched soya alkyd based nanocomposite coatings and their corrosion inhibition efficiency. Hyperbranched alkyd (HBA) was synthesized using SO, pentaerythritol, and phthalic anhydride. The magnetite (Fe₃O₄) nanoparticles were dispersed via sonication in butylated melamine formaldehyde (BMF) modified HBA (HBA–BMF) to formulate the nanocomposite (HBA–BMF–Fe₃O₄) anticorrosive coatings. The ASTM methods were used to evaluate structural, morphological, physicomechanical, thermal, electrochemical, and anticorrosive properties of these coatings. The HBA has a globular structure with the good degree of branching (DOB = 0.69). HBA–BMF and HBA–BMF–Fe₃O₄ nanocomposite coatings showed good flexibility and physicomechanical properties. The inclusion of Fe₃O₄ nanoparticles enhanced the load bearing capacity of nanocomposite coatings by dissipating the instantaneous energy in scratch and impact tests. Electrochemical corrosion studies revealed that the HBA–BMF–Fe₃O₄ nanocomposite coatings exhibit superior corrosion resistance performance (impedance = 10⁷ Ω and corrosion rate 1.0 × 10^–4 mils per year (mpy) than that of HBA–BMF and other similar reported coating systems.

中文翻译：

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超支化大豆醇酸纳米复合涂料：一种可持续的基于原料的防腐纳米复合涂料

球形结构的油性醇酸树脂具有低粘度，良好的流动性，并且在产生不含挥发性有机化合物（VOC）的油漆和涂料中起着重要作用。大豆油（SO）是一种丰富，廉价，可再生和可持续的材料，是满足绿色化学要求的此类油性醇酸前体的实例之一。本工作报道了基于超支化大豆醇酸的纳米复合涂料的合成及其缓蚀效率。使用SO，季戊四醇和邻苯二甲酸酐合成了超支链醇酸树脂（HBA）。通过超声处理将磁铁矿（Fe ₃ O ₄）纳米颗粒分散在丁基化三聚氰胺甲醛（BMF）改性的HBA（HBA-BMF）中，从而配制出纳米复合材料（HBA-BMF-Fe ₃ O₄）防腐涂料。ASTM方法用于评估这些涂层的结构，形态，物理力学，热，电化学和防腐性能。HBA具有球形结构，具有良好的分支度（DOB = 0.69）。HBA-BMF和HBA-BMF-Fe ₃ O ₄纳米复合涂层具有良好的柔韧性和物理机械性能。通过耗散刮擦和冲击试验中的瞬时能量，Fe ₃ O ₄纳米颗粒的加入增强了纳米复合涂层的承重能力。电化学腐蚀研究表明，HBA–BMF–Fe ₃ O ₄纳米复合材料涂层表现出优异的耐腐蚀性能（阻抗= 10 ⁷ Ω和腐蚀速率为1.0×10 ^-4每年密耳（MPY）高于HBA-BMF的和其他类似的报涂料体系。