18 research outputs found
Synthesis of hydroxylated fatty amide from underutilized seed oil of Khaya senegalensis: a potential green inhibitor of corrosion in aluminum
No full textAbstract Background Corrosion is a serious problem all over the world. Most currently used approach to control corrosion have short comings which necessitates the search for novel materials that are green, cheap, from renewable source, and eco-friendly that can be used to combat this problem of corrosion control. Method Khaya senegalensis fatty hydroxylamide (KSFA) was synthesized from K. senegalensis seed oil via simple reaction route involving esterification, transesterification, hydroxylation, and amidation reaction. KSFA was characterized using Fourier-transform infrared (FTIR), nuclear magnetic resonance (1HNMR), CHN elemental analyzer, particle size distribution (PSD), X-ray diffractometer, zeta potential, thermogravimetric analysis (TG), thermogravimetric-mass spectrometer (TG-MS), and scanning electron micrograph (SEM) coupled with energy dispersion spectroscopy (EDS). Inhibitory effect of KSFA on corrosion of aluminum (Al) in 0.5 M HCl was studied at different concentrations of KSFA and temperatures using weight loss method. Result Result from gas chromatography (GC) revealed oil of K. senegalensis to predominantly contain C18:1 (68.46%) fatty acid. Hydroxyl and amide functional groups present in KSFA were confirmed by FTIR and 1HNMR. TG analysis revealed loss in mass around 80–190, 200–450, and above 450 °C while TG-MS revealed five different masses with m/z values 16, 17, 18, 28, and 44. Corrosion inhibition capacity of KSFA was by surface adsorption, which is spontaneous, and physisorption and described by Langmuir isotherm. The corrosion inhibition efficiency of KSFA increased with increase in its concentration while its corrosion rate reduced with increase in concentration. Conclusion The inhibition efficiency of 90.43% exhibited by KSFA and the fact that KSFA was synthesized via non-hazardous process from a renewable sourced biomass is an indication that KSFA is a potential green and efficient inhibitor of corrosion in aluminum. KSFA is simple to use as an inhibitor and easy to prepare
Synthesis of Epoxy Monoethanolamide from Bauhinia monandra Seed Oil
No full textIn this study, we synthesized epoxidised monoethanolamide (EMA) from Bauhinia monandra seed oil (BMO) via a simple reaction route. In this process, BMO was transesterified to obtain a mixture of methyl esters, which was subjected to a urea adduct complexation reaction. The unsaturated methyl esters (BME) from the urea adduct complexation reaction were then epoxidised using performic acid produced in situ in a one-pot reaction system. The epoxidised methyl esters were converted to EMA by reacting them with monoethanolamine (1:10). The progression of the reaction was monitored using Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy, and the fatty acid composition was determined by gas chromatography. The results indicate that the most abundant fatty acid in BMO is C18:1 (25.70% ± 0.20%), with a degree of unsaturation of 49.00% ± 0.50%. After the urea adduct complexation reaction, the degree of unsaturation increased to 95.20% ± 0.10% with C18:2 (75.00% ± 0.10%) becoming the most dominant fatty acid. The oxirane oxygen content was found to be 5.50% ± 0.50%. The results of this study suggest that the urea adduct complexation reaction offers a potential means for increasing the unsaturation of fatty methyl esters. In addition, our findings show that EMA can be produced at low or room temperature
Infrared and Nuclear Magnetic Resonance Studies of A Copper(l) Complex of Vitamin B1,Cu(thiamine)Cl2
No full textSucrose fatty esters from underutilized seed oil of Terminalia catappa as potential steel corrosion inhibitor in acidic medium
No full textCorrosion of metals is a common problem which requires definite attention. In response to this, the oil was extracted from the seed of Terminalia catappa and used to synthesize sucrose fatty esters via simple reaction mechanism which was considered eco-friendly and sustainable. The corrosion inhibition capacity of sucrose fatty esters for mild steel in 1 M HCl was studied using the weight loss method. It was shown that sucrose fatty ester inhibited corrosion process of mild steel and obeyed Langmuir isotherm. Corrosion rate and inhibition efficiency of sucrose fatty esters were found to reduce with increase of immersion time. The study presented sucrose fatty ester as a promising inhibitor of mild steel corrosion in acidic medium
Fatty Acid Composition and Lipid Profile of Diospyros mespiliformis, Albizia lebbeck, and Caesalpinia pulcherrima Seed Oils from Nigeria
No full textThe screening of lesser-known underutilized seeds as source of food has been a way of finding solution to food insecurity in developing nations. In this regard, oil as a class of food was extracted from the seeds of Diospyros mespiliformis (4.72±0.2%), Albizia lebbeck (6.40±0.60%), and Caesalpinia pulcherrima (7.2±0.30%). The oils were finally analyzed for their fatty acid composition, lipid classes, fatty acid distribution in the lipid fractions, and molecular speciation of the triacylglycerols, glycolipids, and phospholipids. The fatty acid composition of the oils varied with C18:2 fatty acid being the most dominant in the oils. Neutral lipids were the most abundant lipid class found in the oils while molecular species of the triacylglycerol with equivalent carbon chain number C40 was majorly present in the oils of Diospyros mespiliformis and Caesalpinia pulcherrima. The present study presents lesser-known underutilized seeds as possible sources of food
Synthesis of tin ferrite-dopped zeolitic imidazolate framework and its application in the photocatalytic degradation of sulfamethoxazole, ciprofloxacin, erythromycin and ampicillin in water
No full textIncomplete removal of antibiotics such as sulfamethoxazole (SMX), ciprofloxacin (CIP), ampicillin (AMP) and erythromycin (ERY) from water is a global challenge. Therefore, tin ferrite incorporated in zeolitic imidazolate framework (SnFe2O4@monoZIF-8) was synthesized as a photocatalyst for complete water photodegradation of SMX, ERY, CIP and AMP. Characterization of SnFe2O4@monoZIF-8 revealed a surface area of 1506.94 m2 g−1 and a direct bandgap of 2.05 eV. SnFe2O4@ZIF-8 exhibited outstanding degradation efficiency with complete removal of SMX, CIP, AMP and 91.00 ± 0.20% of ERY. The regeneration capacity of SnFe2O4@monoZIF-8 is higher than 90%, which reveals it as a promising photocatalyst for water treatment
Synthesis of fatty phenylthiosemicarbazide from underutilized Sesamum indicum seed oil: a promising corrosion inhibitor of carbon steel in developing country
No full textAntibacterial activities of acetonides prepared from the seed oils of Calophyllum inophyllum and Pterocarpus osun
No full textAbstractCalophyllum inophyllum and Pterocarpus osun are underutilized plant species in Nigeria, but these have the potential to serve as a source material for various industries, especially in the pharmaceutical industry. Over the years, the search for antimicrobial agents from cheap and renewable sources has been on the rise. In this study, oil was extracted from the seeds of C. inophyllum and P. osun, analyzed for fatty acid composition, and the oils were then converted into acetonides by simple chemical reactions. The acetonides synthesized from these oils were tested for antimicrobial activities. The oil yield from C. inophyllum (41.96 ± 2.0%) and P. osun (10.16 ± 0.5%) was fairly high. C18:1 was the most dominant fatty acid in C. inophyllum (36.88 ± 0.20%), whereas C18:2 was the most dominant form in P. osun (38.97 ± 0.50%). Acetonides were produced from the oils with a yield of 91.70% for C. inophyllum and 92.10% for P. osun. The synthesis was monitored and confirmed using the PerkinElmer Fourier transform infrared spectrophotometer. The acetonide from C. inophyllum inhibited the growth of organisms such as Escherichia coli, Salmonella typhi, and Pseudomonas aeruginosa, whereas the oil had inhibitory activity against Bacillus subtilis and Staphylococcus aureus. Acetonides from P. osun did not show any inhibition activity against the studied organisms
Production of biodiesel from<i>Terminalia catappa</i>seed oil with high free fatty acids using an acid-catalyzed pretreatment step
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