Synthesis of Hydrophobically Modified Poly(acrylic acid) Gels and Interaction of the Gels with Cationic/Anionic Surfactants

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2002,（10）
• 页码范围: 1088-1096
• 页数: 9页
• 语种: 英文

摘要

Poly( acrylic acid) (PAA) gel network with only chemical crosslinking and hydrophobically modified PAA (HM-PAA)gels with both chemical and physical crosslinking were synthesized by radical polymerization in tert-butanol, using ethylene glycol dimethacrylate (EGDMA) as crosslinker, and 2-(Nethylperfiuorooctanesulfoamido) ethyl methacrylate ( FMA ),stearyl acrylate (SA) or lauryl acrylate (LA) as hydrophobic comonomer respectively. The effect of the fractions and the species of the hydrophobes on swelling properties of HM-PAA gels and the interaction of gels and surfactants were studied.The results showed that the swelling ratio of HM-PAA gels exhibited a sharp decrease with increasing hydrophobic comonomer concentration, which could be ascribed to the formation of strong hydrophobic association among hydrophobic groups. It was proved that two kinds of binding mechanisms of surfactant/gel and different kinds of hydrophobic dusters existed in gels containing both physical and chemical networks.