Tuan Nguyen*, Isaac Pincus, Simon Biggs

 

School of Chemical Engineering, The University of Queensland, QLD, Australia

 

Polymeric nanoparticles, including micelles with a core-shell structure formed by amphiphilic block copolymers, have often been used to enhance stability, solubility, and transport properties, for drug and other bioactive molecules. The hydrophobic core is conventionally used to accommodate poorly water-soluble drug molecules via physical incorporation or chemical conjugation; while, the corona dictates the micelle’s hydrophilicity, charge, and valency, which, in turn, determines the interaction of the whole structure with surrounding environment. Due to geometrical constraints of packing polymer chains into a spherical cavity, current polymeric micelles cannot be used to effectively deliver low molecular weight drug molecules. Here we show how a rational design of novel hydrophilic blocks is needed to make progress on this challenge. Our simulations, using coarse-grained molecular dynamics (CG-MD), provide a detailed molecular-scale picture for the packing of amphiphilic block copolymers with a novel architecture into the core-shell structures. Information about the loading and partitioning of bioactive molecules within the micelles is also obtained.

Figure 1: (a) Self-assembled core-shell structure of block copolymers in water as revealed by the soft-sphere dissipative particle dynamics CG-MD method. (b) Schematic of the equilibrium structure of a polymeric micelle formed by diblock AB copolymer. The corona (purple) composes of the solvophilic block A (red), while the solvophobic block B is in the core (blue).

Biographic Details

Title: Dr

Affiliation, Country: School of Chemical Engineering, The University of Queensland

Phone: +61 7 334 63849     E-mail: tuan.a.h.nguyen@uq.edu.au

Research interests: Colloid and Interface science, and their practical applications in various disciplinary and interdisciplinary contexts

Venue

Room: 
AEB Auditorium