Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 224, Issue 7, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.202200402
Keywords
3D confinement; block copolymers; non-spherical particles; patchy particles; poly(2; 2; 2-trifluoroethyl methacrylate)-b-poly(2-vinylpyridine); self-assembly
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Advancements in nanotechnology have allowed for the preparation of polymer particles with ordered internal and surface structures. This study used 3D confined self-assembly to create well-shaped spheres with ordered mesostructures. The internal mesoporous structure was formed through microphase separation, while the surface mesostructure was caused by the decomposition of certain domains.
Advancements in nanotechnology and materials science have led to an increased demand for specific material functions, preparation, and design of polymer particles with ordered internal and surface mesostructures. In this work, well-shaped spheres of poly(2,2,2-trifluoroethyl methacrylate)-b-poly(2-vinylpyridine) with four different molecular weights are prepared by 3D confined self-assembly. After thermal annealing, these spheres exhibit ordered internal and surface mesostructure. Analytical studies suggest that the internal mesoporous structure is formed by the microphase separation properties of the diblock copolymers, while the formation of ordered mesopores on the surface is caused by the decomposition of the PTFEMA domains under electron irradiation. Other microphase-separated structures, such as cylindrical and lamellar ones, are observed using solution casting and non-solution casting methods in the same diblock copolymer, indicating that the 3D confined environment induces the formation of internal ordered spherical microphase-separated structures in the particles.
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