Non-spherical morphologies from cross-linked biomimetic diblock copolymers using RAFT aqueous dispersion polymerization

作者：Sugihara Shinji^*; Armes Steven P; Blanazs Adam; Lewis Andrew L

来源：Soft Matter, 2011, 7(22): 10787-10793.

DOI：10.1039/c1sm06593a

The RAFT synthesis of cross-linked diblock copolymer nanoparticles was explored using an aqueous dispersion polymerisation formulation. This diblock copolymer comprised biomimetic poly(2-methacryloyloxy)ethyl phosphorylcholine) (PMPC) stabilizing chains and a highly cross-linked poly (2-hydroxypropyl methacrylate) (PHPMA) core-forming block. At either zero or relatively low levels of ethylene glycol dimethacrylate (EGDMA) cross-linker, only spherical morphologies were observed. However, using higher levels of EGDMA led to increasing particle anisotropy, with both a worm-like morphology and a novel 'lumpy rod' morphology (comprising fused nano-sized aggregates of primary spherical particles) being observed.

• 出版日期2011