Abstract Engineering innovative nanomaterials with low volatile organic content (VOC) has awarded great interest to control air pollutant emissions. We designed a highly branched alkyd matrix suitable for surface coating from castor oil via polyesterification. A simple A2 + B3 (di- and tri-functional monomers) methodology was used to prepare the hyperbranched polyester from natural multifunctional monomers. Magnetite-coated silica (Fe3O4@SiO2) particles with 60–70 nm average diameter were prepared by in situ method that binds magnetite nanoparticles to silica nanospheres. The magnetite size and attaching efficiency were controlled by the concentration of chemicals and reflux duration. The nanocomposite coating was prepared by solution casting. The structure-property relationship was studied for different concentrations of nanofiller in the alkyd matrix. The surface and anticorrosive properties were studied via contact angle and salt spray tests. Mechanical performance and thermal stability were assessed by various methods. The highest improvement was achieved with nanofiller insertion up to 0.5% Fe3O4@SiO2 nanospheres.

中文翻译：

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超支化醇酸/磁铁矿-二氧化硅纳米复合材料作为涂层材料

摘要 具有低挥发性有机物 (VOC) 的工程创新纳米材料在控制空气污染物排放方面引起了极大的兴趣。我们设计了一种高度支化的醇酸树脂基质，适用于通过聚酯化由蓖麻油制成的表面涂层。使用简单的 A2 + B3（双和三官能单体）方法从天然多官能单体制备超支化聚酯。通过将磁铁矿纳米颗粒与二氧化硅纳米球结合的原位方法制备了平均直径为 60-70 nm 的磁铁矿包覆二氧化硅 (Fe3O4@SiO2) 颗粒。磁铁矿的大小和附着效率受化学品浓度和回流时间的控制。通过溶液浇铸制备纳米复合涂层。研究了醇酸树脂基质中不同浓度纳米填料的结构-性能关系。通过接触角和盐雾试验研究了表面和防腐性能。通过各种方法评估机械性能和热稳定性。最高的改进是通过插入高达 0.5% Fe3O4@SiO2 纳米球的纳米填料实现的。