物理化学学报2012，Vol.28Issue(6)：1405-1410,6.DOI:10.3866/PKU.WHXB201203202
疏水缔合聚丙烯酰胺与双子表面活性剂的自组装
Self-Assembly of Hydrophobically Associating Polyacrylamide and Gemini Surfactant
摘要
Abstract
The self-assembly of hydrophobically associating polyacrylamide (HAPAM) and the effect of adding gemini surfactant (dimyristic acid glycol ester di(a-sodium sulfonate), DMES-14) were studied by static light scattering, dynamic light scattering, and fluorometry. HAPAM formed hydrophobic microdomains in solution through setf-assembly, which decreased the fluorescence intensity ratio (Ⅰ1 Ⅱ3) of the first peak (373 nm) and the third peak (383 nm) in the emission spectrum of pyrene as the polymer HAPAM concentration (Cp) was increased until a plateau was reached at high Cp. When surfactant was added to the polymer solution, the interaction between HAPAM and surfactant resulted in the formation of mixed micelles. This caused Ijh to decrease as the surfactant concentration (Cs) was increased at the same polymer concentration until Cs was greater than 30 mg - L-1 after which point Ijh showed little change. The aggregation number of aggregates in the mixed system containing surfactant and polymer decreased at first and then increased as Cp was increased. A certain amount of surfactant could enhance interchain interactions, while excess surfactant broke down interchain interactions between the hydrophobic groups of HAPAM, which resulted in maximum values of the apparent weight average molecular weight (Afp.,), root-mean-square radius of gyration (<Rh>), and hydrodynamic radius (<Rh>) of HAPAM as Cs was increased. <Rg>/<Rh> increased slowly as Ce was increased, which reflected the relative stretch of the polymer chains.关键词
疏水缔合聚丙烯酰胺/双子表面活性剂/荧光光谱/聚集数/激光光散射Key words
Hydrophobically associating polyacrylamide/ Gemini surfactant/ Fluorescence spectrum/ Aggregation number/ Laser light scattering分类
化学化工引用本文复制引用
韩利娟,叶仲斌,陈洪,罗平亚..疏水缔合聚丙烯酰胺与双子表面活性剂的自组装[J].物理化学学报,2012,28(6):1405-1410,6.基金项目
中国石油科技创新基金(2011D-5006-0209)资助项目 （2011D-5006-0209）
