Preparation of Non-spherical Particles from Amphiphilic Block Copolymers

Kempe, Kristian; Wylie, Ross A.; Dimitriou, Michael D.; Tran, Helen; Hoogenboom, Richard; Schubert, Ulrich S.; Hawker, Craig J.; Campos, Luis M.; Connal, Luke A.

Abstract:

Simple self-assembly techniques to fabricate non-spherical polymer particles, where surface composition and shape can be tuned through temperature and the choice of non-solvents was developed. A series of amphiphilic polystyrene-b-poly(2-ethyl-2-oxazoline) block copolymers were prepared and through solvent exchange techniques using varying non-solvent composition a range of non-spherical particles were formed. Faceted phase separated particles approximately 300 nm in diameter were obtained when self-assembled from tetrahydrofuran (THF) into water compared with unique large multivesicular particles of 1200 nm size being obtained when assembled from THF into ethanol (EtOH). A range of intermediate structures were also prepared from a three part solvent system THF/water/EtOH. These techniques present new tools to engineer the self-assembly of non-spherical polymer particles.

Research areas:

• Polymer Science

Year:

2016

Type of Publication:

Article

Journal:

Journal of Polymer Science Part A Polymer Chemistry

Volume:

54

Pages:

750 - 757

DOI:

10.1002/pola.27927