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首页> 外文期刊>RSC Advances >Adsorption behavior of the copolymer AM/DMC/APEG/DMAAC-16 on a carbonate rock and its application for acidizing
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Adsorption behavior of the copolymer AM/DMC/APEG/DMAAC-16 on a carbonate rock and its application for acidizing

机译：共聚物AM / DMC / APEG / DMAAC-16在碳酸盐岩上的吸附行为及其在酸化中的应用

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摘要

In this study, a quadripolymer of acrylamide (AM), [2-(methacryloyloxy)ethyl]-trimethylammonium chloride (DMC), allyl polyethylene glycol (APEG), and hexadecyl trimethyl allylammonium chloride (DMAAC-16) was designed and synthesized, which was named PADAD. The molecular structure of PADAD was characterized by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (1H-NMR) spectroscopy. The molecular weight and the dispersion exponent of PADAD were determined by gel permeation chromatography (GPC). The adsorption behavior of PADAD on a carbonate rock surface was investigated. The kinetic model of PADAD on a carbonate rock surface was found to fit the pseudo-second-order kinetic model. The adsorption isotherm model of PADAD on the surface of a carbonate rock fitted with the Freundlich model. Addition of PADAD into 20% HCl obviously reduced the rate of the acid rock reaction. We analyzed the microstructure of the rock surface by scanning electron microscopy (SEM) and found that an adsorption film appeared on the rock surface due to PADAD, which could reduce the contact of acid with the rock surface.
机译：在这项研究中，设计并合成了丙烯酰胺（AM），[2-（甲基丙烯酰氧基）乙基]-三甲基氯化铵（DMC），烯丙基聚乙二醇（APEG）和十六烷基三甲基烯丙基氯化铵（DMAAC-16）的四元共聚物，被命名为PADAD。通过傅里叶变换红外光谱（FT-IR）和核磁共振（ 1 H-NMR）表征了PADAD的分子结构。通过凝胶渗透色谱法（GPC）测定PADAD的分子量和分散指数。研究了PADAD在碳酸盐岩表面的吸附行为。发现碳酸盐岩表面上PADAD的动力学模型符合拟二级动力学模型。 PADAD在碳酸盐岩表面的吸附等温线模型符合Freundlich模型。在20％的HCl中添加PADAD明显降低了酸性岩石反应的速率。我们通过扫描电子显微镜（SEM）分析了岩石表面的微观结构，发现由于PADAD，岩石表面出现了吸附膜，这可以减少酸与岩石表面的接触。

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