盐刺激响应疏水缔合聚合物溶液的流变性能  

Rheological properties of hydrophobic associating polymer solutions in response to salt stimulation

作　　者：刘永 王磊[1,2] 刘利锋[3] 苗林[4] 赖小娟 文新[1,2] 范美玲 刘贵茹 LIU Yong;WANG Lei;LIU Lifeng;MIAO Lin;LAI Xiaojuan;WEN Xin;FAN Meiling;LIU Guiru(College of Chemistry and Chemical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry,Ministry of Education,College of Chemistry and Chemical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;Research Institute of Petroleum Technology,Petrochina Changqing Oilfield Company,Xi'an 710021,Shaanxi,China;Xi’an Changqing Chemical Group Co.,Ltd.,Xi'an 710021,Shaanxi,China)

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021 [2]陕西科技大学化学与化工学院教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [3]中国石油长庆油田分公司油气工艺研究院,陕西西安710021 [4]西安长庆化工集团有限公司,陕西西安710021

出　　处：《精细化工》2022年第7期1486-1494,共9页Fine Chemicals

基　　金：陕西省重点研发计划项目(2021GY-142);陕西省国际科技合作项目(2020KW-025);西安市科技计划项目(2020KJRC0004);陕西省教育厅项目(21JC005)。

摘　　要：以丙烯酰胺、十八烷基二甲基烯丙基氯化铵和异构十烷基聚氧乙烯醚丙烯酸酯(ECY)为原料,通过水溶液聚合反应合成了一种抗盐疏水缔合聚合物(HLMY)。通过表观黏度、荧光光谱、SEM和流变性能测试考察了HLMY在水溶液中的自组装缔合性能以及盐和温度对HLMY缔合行为的影响。结果表明,HLMY的临界缔合质量分数为0.30%~0.35%。盐的加入增强了拟空间网络结构,同时,HLMY分子在NaCl溶液中比在CaCl_(2)溶液中聚集得更紧密。在90、120和180℃,170 s^(-1)下,将质量分数为0.6%的HLMY溶液(以质量分数为5%NaCl水溶液为溶剂)剪切时间<500 s时,表观黏度随温度的升高而增加,说明HLMY在NaCl中具有优异的盐增稠能力,继续剪切2500 s后,表观黏度仍>50 m Pa·s。弹性模量(G')随HLMY质量分数的增加而增大,体系的弹性增大,形成密集的拟空间网络结构。A novel salt-resistant hydrophobic associating polymer(HLMY)was synthesized via aqueous solution polymerization of acrylamide(ECY),octadecyldimethylpropyl ammonium chloride and iso-decane polyoxyethylene ether acrylate.The self-association properties as well the effects of salt and temperature on the association behavior of HLMY were investigated by apparent viscosity,fluorescence,SEM and rheological properties tests.The results showed that the critical association mass fraction of HLMY was about 0.30%~0.35%.Meanwhile,salt addition enhanced the quasi-spatial network structure with more close clustering of HLMY molecules in Na Cl solution than in CaCl_(2) solution.Moreover,it was found that the apparent viscosity of HLMY with a mass fraction of 0.6% in 5% NaCl solution increased with the increment of temperature from 90 to 180℃ at the conditions of shear time<500 s and shear rate at 170 s^(-1),indicating excellent salt thickening ability of HLMY in NaCl.The apparent viscosity still remained larger than 50 mPa·s when shear time elongated to 2500 s.The elastic modulus(G’)increased with the increase of HLMY mass fraction,and the elasticity of the system increased,forming a dense quasi-spatial network structure.

关 键 词：疏水缔合效应 盐增稠 刺激响应 协同效应 黏弹性 油田化学品 

分 类 号：TE357[石油与天然气工程—油气田开发工程]