Shape Controlled, Monodisperse Block Copolymer Particles through Particle Restructuring by Solvent Engineering
발표자
()
초록
내용
Non-spherical colloidal particles of block copolymer (BCP) are important class of materials. Here, we introduce a re-shaping strategy using solvent vapor annealing (SVA) to transform the size controlled, monodisperse BCP spheres into shape-anisotropic particles to demonstrate their potential to control both internal morphology and overall particle shape. BCP spheres in a wide range of particle size were first produced using Shirasu Porous Glass (SPG) membrane emulsification. Then, successful transformation to non-spherical shapes was conducted using SVA. This approach was applicable to various types of BCPs including polystyrene-block-poly(1,4-butadiene) (PS-b-PB), polystyrene-block-polydimethylsiloxane (PS-b-PDMS), polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) which allows control over aspect ratio (AR). Furthermore, versatility of SVA on particle shape was demonstrated by successfully transforming BCP spheres into various shapes such as prolate and oblate ellipsoids.