Department of Chemistry, P.S.G.R. Krishnammal College for Women, Peelamedu, Coimbatore 641004, Tamil Nadu, India.
Department of Chemistry, P.S.G.R. Krishnammal College for Women, Peelamedu, Coimbatore 641004, Tamil Nadu, India.
Ecotoxicol Environ Saf. 2016 Dec;134(Pt 2):319-326. doi: 10.1016/j.ecoenv.2015.08.014. Epub 2015 Aug 25.
The use of natural fibers as reinforcing materials in thermoplastics and thermoset matrix composites provide optimistic environmental profits with regard to ultimate disposability and better use of raw materials. The present work is focused on the corrosion inhibition property of a polymer matrix composite produced by the use of groundnut shell (GNS) waste. Polyester (PE) was synthesized by condensation polymerization of symmetrical 1,3,4-oxadiazole and pimelic acid using sodium lauryl sulfate as surfactant. The polyester-groundnut shell composite (PEGNS) was prepared by ultrasonication method. The synthesized polyester-groundnut shell composite was characterized by FT-IR, TGA and XRD analysis. The corrosion inhibitory effect of PEGNS on mild steel in 1M HSO was investigated using gravimetric method, electrochemical impedance spectroscopy, potentiodynamic polarization, atomic absorption spectroscopy and scanning electron microscopy. The results showed that PEGNS inhibited mild steel corrosion in acid solution and indicated that the inhibition efficiency increased with increasing inhibitor concentration and decrease with increasing temperature. The composite inhibited the corrosion of mild steel through adsorption following the Langmuir adsorption isotherm. Changes in the impedance parameters R, C, I, E, b and b suggested the adsorption of PEGNS onto the mild steel surface, leading to the formation of protective film.
天然纤维作为热塑性塑料和热固性基体复合材料的增强材料的使用，在最终可处置性和原材料的更好利用方面提供了乐观的环境效益。本工作集中于使用落花生壳（GNS）废料生产的聚合物基体复合材料的腐蚀抑制性能。聚酯（PE）通过对称 1,3,4-恶二唑和戊二酸的缩聚聚合反应，使用十二烷基硫酸钠作为表面活性剂来合成。通过超声处理方法制备聚酯-落花生壳复合材料（PEGNS）。通过傅里叶变换红外光谱（FT-IR）、热重分析（TGA）和 X 射线衍射（XRD）分析对合成的聚酯-落花生壳复合材料进行了表征。使用重量法、电化学阻抗谱（EIS）、动电位极化、原子吸收光谱和扫描电子显微镜（SEM）研究了 PEGNS 在 1M HSO 中对低碳钢的腐蚀抑制作用。结果表明，PEGNS 在酸性溶液中抑制低碳钢腐蚀，并且随着抑制剂浓度的增加和温度的降低，抑制效率增加。该复合材料通过遵循 Langmuir 吸附等温线的吸附抑制低碳钢的腐蚀。阻抗参数 R、C、I、E、b 和 b 的变化表明 PEGNS 吸附在低碳钢表面，形成保护膜。
