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首页> 外文期刊>Journal of Applied Polymer Science >MPEG grafted quaternized carboxymethyl chitosan for demulsification of crude oil emulsions
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MPEG grafted quaternized carboxymethyl chitosan for demulsification of crude oil emulsions

机译：MPEG接枝季甲基甲基壳聚糖用于破乳的原油乳液

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摘要

Four novel environmentally friendly and highly branched crude oil demulsifiers were prepared by using different molecular weight (M-n=350, 750, 1000, 1900 g/mol) of methoxy poly(ethylene glycol) to modify quaternized N,O-carboxymethyl chitosan. Fourier transform infrared and H-1-nuclear magnetic resonance were employed to confirm the structure of the demulsifiers. The surface tension of demulsifies was determined and hydrophile-lipophile balance value was calculated at the critical micelle concentration. The demulsification performance was evaluated by the bottle test method against water-in-oil emulsions simulated in the laboratory and it was found that the dehydration rate of four demulsifiers can come to 74.2%-80.4%, which have better demulsification performance than the commercial demulsifier JL-1. Demulsification mechanism was discussed, and it was encouraging to find that the tiny water droplets in the emulsion coalesced to form the water phase and separated with the water from the polarization microscope. Results show that methoxy poly(ethylene glycol) grafted quaternized carboxymethyl chitosan has a promising application as a demulsifiers for dealing with W/O crude oil emulsions. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45867.
机译：通过使用不同的分子量（M-N = 350,750,1000,1900g / mol）甲氧基聚（乙二醇）来改变季铵化N，O-羧甲基壳聚糖制备四种新的环保和高度分支原油破乳剂。傅里叶变换红外线和H-1核磁共振用于确认破乳剂的结构。确定破乳的表面张力，并在临界胶束浓度下计算亲水性 - 亲脂性平衡值。破乳性能通过对在实验室模拟的水油乳液瓶测试方法评估，发现四个破乳剂脱水率能到74.2％-80.4％，这比商业破乳剂更好的破乳性能JL-1。讨论破乳机构，和令人鼓舞地发现，在乳液中的小水滴聚结，以形成水相，并用从偏振显微镜的水分离。结果表明，甲氧基聚（乙二醇）接枝的季铵化的羧甲基脱乙酰壳多糖具有有前途的应用程序作为破乳剂用于为W处理/ O原油乳液。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45867。

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