γ辐射诱导聚丙烯酸丁酯接枝到乙烯-醋酸乙烯酯共聚物上以改善原油流动性。

Gamma radiation-induced grafting of poly(butyl acrylate) onto ethylene vinyl acetate copolymer for improved crude oil flowability.

作者信息

Siddiq Ahmed, Ghobashy Mohamed M, El-Adasy Abu-Bakr A A M, Ashmawy Ashraf M

机构信息

Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt.

Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.

出版信息

Sci Rep. 2024 Apr 17;14(1):8863. doi: 10.1038/s41598-024-58521-w.

DOI:10.1038/s41598-024-58521-w

PMID:38632269

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11024112/

Abstract

Ethylene vinyl acetate (EVA) copolymers are widely employed as pour point depressants to enhance the flow properties of crude oil. However, EVA copolymers have limitations that necessitate their development. This work investigated the modification of EVA via gamma radiation-induced grafting of butyl acrylate (BuA) monomers and the evaluation of grafted EVA as a pour point depressant for crude oil. The successful grafting of poly(butyl acrylate) p(BuA) onto EVA was verified through grafting parameters, FTIR spectroscopy, and H NMR spectroscopy. Treating crude oil with 3000 ppm of (EVA) (EVA), and (1EVA:3BuA) yielded substantial reductions in pour point of 24, 21, and 21 °C, respectively. Also, rheological characterization demonstrated improving evidenced by a viscosity reduction of 76.20%, 67.70%, and 71.94% at 25 °C, and 83.16%, 74.98%, and 81.53% at 12 °C. At low dosages of 1000 ppm, the EVA-g-p(BuA) exhibited superior pour point reductions compared to unmodified EVA, highlighting the benefit of incorporating p(BuA) side chains. The grafted EVA copolymers with p(BuA) side chains showed excellent potential as crude oil flow improvers by promoting more effective adsorption and co-crystallization with paraffin wax molecules.

摘要

乙烯-醋酸乙烯酯（EVA）共聚物被广泛用作降凝剂以改善原油的流动性能。然而，EVA共聚物存在局限性，这就需要对其进行改进。本研究通过γ辐射引发丙烯酸丁酯（BuA）单体接枝改性EVA，并对接枝后的EVA作为原油降凝剂进行了评价。通过接枝参数、傅里叶变换红外光谱（FTIR）和核磁共振氢谱（H NMR）证实了聚丙烯酸丁酯（p（BuA））成功接枝到EVA上。用3000 ppm的（EVA）、（EVA）和（1EVA:3BuA）处理原油，倾点分别大幅降低了24、21和21℃。此外，流变学表征表明有所改善，在25℃时粘度分别降低了76.20%、67.70%和71.94%，在12℃时分别降低了83.16%、74.98%和81.53%。在1000 ppm的低剂量下，EVA-g-p（BuA）相比未改性的EVA表现出更优异的降倾点效果，突出了引入p（BuA）侧链的益处。带有p（BuA）侧链的接枝EVA共聚物通过促进与石蜡分子更有效的吸附和共结晶，展现出作为原油流动改进剂的巨大潜力。