物理化学学报 >> 1994, Vol. 10 >> Issue (10): 909-914.doi: 10.3866/PKU.WHXB19941009

研究论文 上一篇    下一篇

聚丙烯酰胺与混合表面活性剂的相互作用

徐桂英, 苏红梅, 李干佐, 刘木辛, 李方, 毛宏志   

  1. 山东大学胶体与界面化学研究所,济南 250100
  • 收稿日期:1993-08-23 修回日期:1994-01-10 发布日期:1994-10-15
  • 通讯作者: 徐桂英

The Interaction between Polyacrylamide and Mixed Surfactants

Xu Gui-Ying, Su Hong-Mei, Li Gan-Zuo, Liu Mu-Xin, Li Fang, Mao Hong-Zhi   

  1. Institute of Colloid and Interface Chemistry,Shandong University,Jinan 250100
  • Received:1993-08-23 Revised:1994-01-10 Published:1994-10-15
  • Contact: Xu Gui-Ying

摘要:

通过粘度和紫外吸收光谱的测定,研究了PAM与R12SO3Na-R11COONa混合表面活性剂之间的相互作用.结果表明,PAM可与混合表面活性剂形成复合物,从而使体系表现出典型聚电解质的粘度行为,可能的机理是,以流水力形成的R12SO3--R11COOH(Na)预波束或二聚体通过PAM-R11COOH间的氢健力相结合,进而使大分子链上带有大量负电行,静电斥力引起大分子链伸展,因而产生电粘效应.

关键词: 聚丙烯酰胺(PAM), 月桂酸钠(R11 COONa), 十二烷基磺酸钠(R12SO3Na), 比浓粘度, 相互作用

Abstract:

The interaction between polyacrylamide (PAM) and sodium dodecyl sulfonate (R12SO3Na)-Laurate (R11COONa) mixture in various NaOH concentration and mole ratio n(R12S03Na)/n(R11COONa) have been studied by viscosity and ultraviolet-visible spectroscopy. The reduced viscosity measurements show that PAM/R12SO3Na-R11COONa mixed soutions exhibit viscometric behavior of polyelectro1yte-electro -viscous effect. This phenomenon appears even when the concentration of mixed surfactant is smaller than their CMC. The electro-viscous effect of mixed systems increases with the raise of R11COONa amount and the decrease of the concentration of NaOH. These results indicate the complex of PAM-mixed surfactant was taking shape in solution. It was found from ultraviolet visible spectroscopy that hydrogen bond was formed between PAM and R11COOH. The premicelle formation in surfactant solution is posible as concentration of surfactan is smaller than CMC. Therefore, we guess that interaction between PAM and mixed surfactant occurs due to premicelle of mixed surfactans binding to the macro-molecule of PAM by the bydrogen bond of PAM-R11COOH before the formation of the normal micelle.

Key words: Polyacrylamide(PAM), Sodium dodecyl sulfonate, Laurate, Ruduced viscosity, Interaction