Mobile Gates Driven by Intermolecular Hydrogen Bonding

摘要

abstract_textpA novel family of mobile gates is reported. The proposed gates were fabricated with polyacrylamide (PAAM) microspheres solution and the immobilizing-poly(acrylic acid) (PAAC) membrane using their intermolecular hydrogen bonding. Under the range of the molar ratio of the amide groups and carboxylic acid groups being from 26 to 38, the system showed off when PAAM microspheres combined with PAAC at the temperatures being lower than upper critical solution temperature (UCST) of PAAM-PAAC while displayed on when PAAM microspheres were far away PAAC at the temperatures being higher than the UCST. The results of the optical microscopy images and reversible thermoresponsive release experiments display that the gates had satisfactorily reversibility and renewability. The proposed mobile gates provide a new mode of behavior for drug delivery systems and other chemical purification./p/abstract_text