Synthesis and evaluation of novel water-soluble copolymers based on acrylamide and modular ¦Â-cyclodextrin

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• 作者：Xiangjun Liu^a ; Wenchao Jiang^b ; Shaohua Gou^a ; ^b ; ^{shaohuagou@swpu.edu.cn} ; ^{shgou@126.com} ; Zhongbin Ye^a ; ^b ; Mingming Feng^b ; Nanjun Lai^a ; ^b ; Lixi Liang^a
• 关键词：Acrylamide ; ¦Â-Cyclodextrin ; Crystalline interspace ; Enhanced oil recovery ; Sodium montmorillonite
• 刊名：Carbohydrate Polymers
• 出版年：2013
• 出版时间：1 July, 2013
• 年：2013
• 卷：96
• 期：1
• 页码：47-56
• 全文大小：3762 K

文摘

Mono-6-(allyl amino)-¦Â-cyclodextrin (N-¦Â-CD) and mono-2-O-(allyl oxygen radicals-2-hydroxyl propyl)-¦Â-cyclodextrin (O-¦Â-CD) were copolymerized with acrylamide (AM), acrylic acid (AA), and 1-llyl-3-oil acyloxyimidazole-1-ammonion bramide (AOAB) initiated by redox initiation system in an aqueous medium. The AM/AA/AOAB/N-¦Â-CD and AM/AA/AOAB/O-¦Â-CD were prepared by adjusting the reactive conditions, such as initiator concentration, pH, temperature, and monomer ratios. The obtained copolymers were characterized by means of infrared (IR) spectroscopy, ¹H NMR spectroscopy, scanning electron microscope (SEM), rotational rheometer, intrinsic viscosity, salt resistance, core flood test, etc. The temperature-tolerance, shear-tolerance, salt-resistance and thickening function of these copolymers are improved remarkably compared with partially hydrolyzed polyacrylamide (HPAM). About 18.3 % and 12.5 % oil recovery could be enhanced by 2000 mg/L AM/AA/AOAB/N-¦Â-CD and AM/AA/AOAB/O-¦Â-CD comparing with water-flooding. In addition, the result of X-ray diffractometry (XRD) test showed that the solutions of obtained copolymers could remarkably reduce the crystalline interspace of sodium montmorillonite (from 18.9 ? to 15.3 ?).