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Bio-based epoxy/polyaniline nanofiber-carbon dot nanocomposites as advanced anticorrosive materials

机译:生物基环氧/聚苯胺纳米纤维 - 碳点纳米复合材料作为先进的防腐蚀材料

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Application of anticorrosive coating on metal surface enhances the durability of the metal. Anticorrosion can be achieved by the incorporation of conducting nanomaterials like polyaniline or its nanohybrid to a coating material. Thus, bio-based epoxy nanocomposites were fabricated by the in situ method using polyaniline nanofiber-carbon dot nanohybrid (0.50 and 1 wt % with respect to epoxy), as the anticorrosive material. The epoxy resin was obtained by polycondensation of bisphenol-A, sorbitol, and monoglyceride of castor oil (mole ratio of 16:3:1), as hydroxyl compounds with epichlorohydrin (1:3 equivalent, hydroxyl:epichlorohydrin). The morphological analyses of the nanocomposites revealed the uniform dispersion and good compatibility of the nanohybrid in the epoxy matrix. The thermosets demonstrated good tensile strength (30MPa), elongation at break (45%), scratch resistance (>10 kg) and impact resistance (14.75 kJ/m), good thermal stability (above 250 degrees C), and chemical resistance. The anticorrosion study of the nanocomposites showed excellent corrosion protection efficiency (corrosion rate: 5.68x 10(-3) mils per year) in 3.5 wt % NaCl compared to the pristine epoxy system. Therefore, this bio-based thermosetting epoxy nanocomposite was demonstrated as efficient anticorrosive material. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47744.
机译:防腐蚀涂层对金属表面的应用增强了金属的耐久性。通过将纳米材料掺入多酰氯或其纳米冬次的涂层材料,可以通过掺入涂料来实现防腐。因此,通过使用聚苯胺纳米纤维 - 碳点纳米冬次(相对于环氧树脂的0.50和1wt%)的原位方法制备生物基环氧纳米复合材料作为防腐蚀材料。环氧树脂是通过缩聚的双酚-A,山梨糖醇和蓖麻油(摩尔比为16:3:1)的单甘油,作为羟基氯醇(1:3当量,羟基:表氯醇)的羟基化合物。纳米复合材料的形态学分析揭示了环氧基质中纳米油的均匀分散和良好的相容性。热固性件显示出良好的拉伸强度(30MPa),断裂伸长(45%),耐刮擦性(> 10kg)和抗冲击性(14.75 kJ / m),良好的热稳定性(250℃以上)和耐化学性。与原始环氧系统相比,纳米复合材料的防腐效率(腐蚀速率:每年5.68×10(-3)米尔)显示出优异的腐蚀保护效率(每年5.68×10(-3)米尔)。因此,这种基于生物的热固性环氧纳米复合材料被证明为有效的抗腐蚀性材料。 (c)2019 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2019,136,47744。

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