Synthesis and Characterization of Alkyd Resin Immersed in Silver-Nanoparticle Derived from Cottonseed Oil

Omowonuola, O. E., Victor-Oji, C.O., Chukwu, U. J.
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Abstract

Alkyd resin prepared from Gossypium hirsutum (cotton seed) seed oil and immersed in silver nanoparticles has been characterized and evaluated using standard analytical methods. Gas Chromatography-Mass Spectrometry (GCMS) was used to determine the fatty acid profile of the seed oil extract which was physicochemically characterized using AOAC standard method. The results obtained are as follows: Iodine value; 102.36g I2/100g, Acid value; 3.19 mgKOH/g, Saponification value; 202.32 mg/KOH/g, Refractive index; 1.46, Specific gravity; 0.91 and Moisture content; 1.20. The alkyd resin was prepared using alcoholysis-polyesterification reaction. The prepared resin was then immersed in silver benzoate to give Gossypium hirsutum immersed silver nanoparticle alkyd resin (GHSOR-AgNps) and the formulated resin was analyzed using Ultraviolet-Visible spectroscopy (UV), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM). UV-visible spectroscopy was used to analyze the silver benzoate salt. The performance of the formulated resin was assessed and revealed thus: soluble in both polar and non-polar organic solvents used in the study, dried through after 24 hours, showed chemical resistance to 0.1M NaOH with total removal, and its acid value was below 10 mgKOH/g. Therefore, Gossypium hirsutum seed oil (GHSO) has been shown to be a cost-effective, renewable and sustainable feedstock for alkyd resin production in the coating industry.
浸入棉籽油衍生银纳米粒子的醇酸树脂的合成与表征
采用标准分析方法对从棉花籽油中提取的醇酸树脂进行了表征和评估。采用气相色谱-质谱法(GCMS)测定了棉籽油提取物的脂肪酸谱,并采用 AOAC 标准方法对其进行了理化表征。结果如下碘值:102.36g I2/100g,酸值:3.19 mgKOH/g,皂化值:202.32 mg/KOH/g,折射率:1.46,比重:0.91,水分含量:1.20。醇酸树脂是通过醇解-聚酯化反应制备的。然后将制备好的树脂浸入苯甲酸银中,得到浸入银纳米粒子的 Gossypium hirsutum 醇酸树脂(GHSOR-AgNps),并使用紫外可见光谱(UV)、傅立叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)对配制好的树脂进行分析。紫外可见光谱用于分析苯甲酸银盐。对所配制树脂的性能进行了评估,结果表明:该树脂可溶于研究中使用的极性和非极性有机溶剂,24 小时后即可干燥,对 0.1M NaOH 具有耐化学性,可完全去除,其酸值低于 10 mgKOH/g。因此,研究表明,棉子油(GHSO)是涂料行业生产醇酸树脂的一种经济、可再生和可持续的原料。
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