Guest - Host Interaction between Hydrophobically Modified Polyacrylamide and Water-soluble β-Cyclodextrin-Epichlorohydrin Polymer

摘要

A supramolecular recognizing system was constructed based on the water-soluble β-cyclodextrin- epichlorohydrin polymer (β-CD-EP) as host and hydrophobically modified polyacrylamide of P(AM-NaA-OAM) as guest. P(AM-NaA-OAM) was synthesized using micellar polymerization and β-CD-EP polymer was produced by the reaction of β-CD with epichlorohydrin (EP) in an alkaline medium. Viscosity, rheology and fluorescent probe were used to study the host-guest interaction of the inclusion complexes between P(AM-NaA-OAM) and β-CD-EP polymer. The inclusion complex of P(AM-NaA-OAM) and β-CD-EP polymer has obvious privilege in viscosity enhancement under and around critical aggregation concentration (CAC) of P(AM-NaA-OAM). Both the inclusion association and intermolecular hydrophobic association can exist in the inclusion complex. At CD/OAM ratio of 1, a maximum of 2.3-fold enhancement of apparent viscosity was observed. The inclusion complex showed better salt resistant performance compared with P(AM-NaA-OAM) because the increasing polarity forced more and more intermolecular association to form inclusion association.