Abdullah Mahmood M S, Al-Lohedan Hamad A
Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
Nanomaterials (Basel). 2021 Nov 15;11(11):3081. doi: 10.3390/nano11113081.
Over the past few decades, there has been an increased trend for the use of natural compounds and their derivatives as alternatives to traditional chemicals and is due to their renewability, green character, and wide availability. This work aims to convert sodium alginate (S.ALG), a natural polysaccharide, into amides through its conversion to alginic acid (H.ALG). The formed H.ALG was esterified using methanol, followed by a reaction with octadecylamine (OA) and dodecylamine (DA) to produce corresponding amides, OA-ALG, and DA-ALG, respectively. The synthesized OA-ALG and DA-ALG were used as capping agents to further form hydrophobic magnetite nanoparticles (MNPs), OA-MNPs and DA-MNPs, respectively. The chemical structures, morphology, hydrophobicity, and magnetic properties of OA-MNPs and DA-MNPs were investigated using different instrumental techniques. Furthermore, the efficacy of as-synthesized MNPs as oil spill collectors were also evaluated using different ratios of MNPs:crude oil. From the analysis of results, the OA-MNPs and DA-MNPs exhibited high efficiency in the collection of oil spill even at low ratios of MNPs:crude oil.
在过去几十年里，使用天然化合物及其衍生物替代传统化学品的趋势有所增加，这归因于它们的可再生性、绿色特性和广泛可得性。这项工作旨在通过将天然多糖海藻酸钠（S.ALG）转化为海藻酸（H.ALG），进而将其转化为酰胺。生成的H.ALG用甲醇酯化，随后与十八胺（OA）和十二胺（DA）反应，分别生成相应的酰胺OA - ALG和DA - ALG。合成的OA - ALG和DA - ALG用作封端剂，进一步分别形成疏水性磁铁矿纳米颗粒（MNPs），即OA - MNPs和DA - MNPs。使用不同的仪器技术研究了OA - MNPs和DA - MNPs的化学结构、形态、疏水性和磁性。此外，还使用不同比例的MNPs:原油评估了合成的MNPs作为溢油收集剂的功效。从结果分析来看，即使在MNPs:原油比例较低时，OA - MNPs和DA - MNPs在溢油收集方面也表现出高效率。
