Quan Hongping, Lu Qiangying, Chen Zhonghao, Huang Zhiyu, Jiang Qingying
College of Chemistry and Chemical Engineering, Southwest Petroleum University Chengdu 610500 PR China.
Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province Chengdu 610500 PR China.
RSC Adv. 2019 Apr 18;9(22):12300-12309. doi: 10.1039/c9ra01932d. eCollection 2019 Apr 17.
In this study, acrylamide (AM), allyl polyethylene-1000 (APEG), octadecyl dimethyl allyl ammonium chloride (DMDAAC-18), and sodium styrene sulfonate (SSS) were chosen to synthesize a quadripolymer (HPAAT) in which a hydrophobic association exists between the molecules. The critical concentration of the hydrophobic association was determined using fluorescence spectrophotometry. Furthermore, HPAAT formed films by adsorbing onto a carbonate rock surface. The molecular structure of HPAAT was characterized using Fourier-transform infrared spectroscopy and H-NMR spectroscopy, the results showed that the obtained product was consistent with the target product. The intrinsic viscosity was determined using an Ubbelohde viscometer. The molecular weight and dispersion exponent of HPAAT were determined using gel permeation chromatography. Addition of HPAAT into 20% HCl decreased the reaction rate of the acid rock obviously, even at a low viscosity. Variation of the reaction rate with time with different amounts of HPAAT was investigated using the volume of carbon dioxide gas produced. The adsorption and desorption of HPAAT on a carbonate rock surface were demonstrated using infrared spectroscopy analysis, scanning electron microscopy and ultraviolet spectrophotometry.
在本研究中，选用丙烯酰胺（AM）、烯丙基聚醚-1000（APEG）、十八烷基二甲基烯丙基氯化铵（DMDAAC-18）和苯乙烯磺酸钠（SSS）来合成一种分子间存在疏水缔合的四元共聚物（HPAAT）。使用荧光分光光度法测定疏水缔合的临界浓度。此外，HPAAT通过吸附在碳酸盐岩表面形成薄膜。利用傅里叶变换红外光谱和氢核磁共振光谱对HPAAT的分子结构进行了表征，结果表明所得产物与目标产物一致。使用乌氏粘度计测定特性粘度。使用凝胶渗透色谱法测定HPAAT的分子量和分散指数。即使在低粘度下，向20%盐酸中添加HPAAT也明显降低了酸岩反应速率。利用产生的二氧化碳气体体积研究了不同用量的HPAAT时反应速率随时间的变化。通过红外光谱分析、扫描电子显微镜和紫外分光光度法证明了HPAAT在碳酸盐岩表面的吸附和解吸。
