Papers Published

  1. Wang, Jun and Sun, Daniel N. and Shin-ya, Yoshitsune and Leong, Kam W., Stimuli-responsive hydrogel based on poly(propylene phosphate), Macromolecules, vol. 37 no. 2 (2004), pp. 670 - 672 [ma035453d] .
    (last updated on 2007/04/13)

    Abstract:
    Poly(propylene phosphate) solutions were studied and found to display a sol-gel transition temperature that can be controlled by adjusting the concentrations of polymer and Ca2+ so that the therapeutic delivery cargo is liquid at room temperature but solidifies at the in vivo temperature of 37°C. The gels showed rapid gelation kinetics but instability at high shear strains. Ion exchange between buffer and gel induced a dissociation of the network with time, leading to a zero-order controlled release of plasmid DNA or lysozyme.

    Keywords:
    Hydrogels;Phase transitions;Synthesis (chemical);Biodegradation;Biocompatibility;Rheology;Shear stress;Temperature;Elastic moduli;Gel permeation chromatography;Nuclear magnetic resonance spectroscopy;