A nonionic binary aqueous interaction system consisting ofβ-cyclodextrin trimer (β-CD
3) and naphthaleneterminated poly(ethylene glycol) (PEG-NP2), which has tunable upper critical solution temperature (UCST) behavior around room temperature and lower critical solution temperature (LCST) behavior at high temperature, was investigated. In the UCST transition, gel-like aggregates form because of supramolecular inclusion complexation between β-CD3 and PEG-NP2. During LCST transition, PEG-NP2 becomes insoluble in water, which results in its precipitation. The effects of concentration, stoichiometry of the two components, and electrolyte on UCST behavior are discussed. This study
provides a new nonionic thermoresponsive material.
全文链接：http://pubs.acs.org/doi/abs/10.1021/la501278n