离子型疏水缔合共聚物的分子复合  

INTERMOLECULAR COMPOSITE OF HYDROPHOBICALLY ASSOCIATING IONIC COPOLYMERS

作　　者：钟传蓉[1,2] 邓俊[1] 罗平亚[2] 刘文祥[1] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川新都610500

出　　处：《石油学报（石油加工）》2009年第1期78-83,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：油气藏地质及开发工程国家重点实验室开放基金项目(PCL200601);中国博士后科学基金项目(20060391033)资助

摘　　要：通过丙烯酰胺(AM)/丁基苯乙烯(BST)/2-丙烯酰胺基-2-甲基丙磺酸钠(NaAMPS)阴离子共聚物(PASA)与丙烯酰胺(AM)/BST/二甲基二烯丙基氯化铵(DMDAAC)阳离子共聚物(PBAD)的分子复合,得到复合型疏水缔合聚合物驱油剂PASA/PBAD。溶液表观黏度测试和原子力显微镜(AFM)结果表明,反电荷的静电相互吸引作用能加强疏水基团的分子间缔合作用,形成流体力学体积巨大的缔合结构,使得当PASA/PBAD复合聚合物中PBAD质量分数分别为15%和90%时,其质量浓度为2 g/l的水溶液和NaCl溶液(NaCl浓度为1.026 mol/l)的表观黏度分别为3561和227 mPa.s,远高于相同质量浓度PBAD和PASA单组分的水和NaCl溶液的表观黏度。在NaCl浓度更高(1.710 mol/l)时,PASA/PBAD的NaCl溶液的表观黏度仍能达到201 mPa.s,显示了其良好的抗盐性。复合聚合物溶液的耐温和抗剪切性能也得到了明显的提高。Acrylamide/butyl styrene/ sodium 2-acrylamido-2-methylpropane sulphonate copolymer （PASA） and acrylamide/butyl styrene/dimethyldiallyammonium chloride copolymer （PBAD） were blended to form an intermolecular composite polymer of PASA/PBAD. The solution apparent viscosity and atomic force microscope （AFM） measurements showed that the intermolecular hydrophobic associations were reinforced via electrostatic attraction of opposite charges and the network structures with huge hydrodynamic volume were formed. When the mass fractions of PBAD in PASA/PBAD were 15% and 900//00, respectively, the apparent viscosities of the 2 g/1 aqueous and NaC1 solutions （The concentration of NaCl was 1. 026 mol/l） of PASA/PBAD were 3561 mPa. s and 227 mPa. s, respectively, which were greatly higher than that of the aqueous and brine solution of mono-component polymer PBAD and PASA with the same mass concentration. With increasing the NaCl concentration to 1. 710 mol/1, the brine solution viscosity of PASA/PBAD was still up to 201 mPa. s, indicating its good salt resistance. The anti-shearing and anti-heating properties of PASA/PBAD composite solution were also obviously improved.

关 键 词：分子复合 疏水缔合 丙烯酰胺 原子力显微镜(AFM) 溶液表观黏度 

分 类 号：TQ326.4[化学工程—合成树脂塑料工业]