Fabrication of Microporous Film and Microspheres Hybrids

Abstract

Hybrids consisting of a microporous film and polymeric microspheres were fabricated via a simple method without a special apparatus. Highly ordered microporous polymer films with honeycomb structure were fabricated by a dissipative process utilizing amphiphilic poly(acrylic acid)block-polystyrene, which was synthesized by atom transfer radical polymerization followed by an acid-catalyzed ester cleavage reaction. In order to embed the microsphere efficiently, the dried microporous films should be soaked in methanol to alter the surface functionality and to improve the wettability of the film surface. The introduction of amino functionality to polystyrene microspheres by seeded polymerization of N,N-dimethylaminoethyl methacrylate drastically improved the embedding efficiency. The effect of open pore size was also investigated.

Diverse Particle Carriers Prepared by Co‐Precipitation and Phase Separation: Formation and Applications

“…Generally, the interfacial tension between polymers increases as the polymer molecular weights increase, leading to morphologic changes. [43,44,45,46] Ge et al demonstrated that low molecular weight PS (L-PS) and low molecular weight PMMA (L-PMMA) form spherical Janus particles while H-PS and H-PMMA form snowman-like Janus particles. [47] The difference between the final morphologies is attributed to the different interfacial tensions between PS and PMMA with different molecular weights, i. e. the polymer/polymer interfacial tension increases as the polymer molecular weights increase, causing less interfacial area between the polymers.…”

“…Generally, the interfacial tension between polymers increases as the polymer molecular weights increase, leading to morphologic changes [43,44,45,46] . Ge et al.…”