Schaller Roman, Hils Christian, Karg Matthias, Schmalz Holger
Macromolecular Chemistry II, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany.
Physical Chemistry I / Colloids and Nanooptics, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany.
Macromol Rapid Commun. 2023 Feb;44(3):e2200682. doi: 10.1002/marc.202200682. Epub 2022 Nov 6.
The unique corona structure of surface-compartmentalized micelles (Janus micelles, patchy micelles) opens highly relevant applications, e.g. as efficient particulate surfactants for emulsion stabilization or compatibilization of polymer blends. Here, stereocomplex-driven self-assembly (SCDSA) as a facile route to micelles with a semicrystalline stereocomplex (SC) core and a patch-like microphase separated corona, employing diblock copolymers with enantiomeric poly(L-lactide)/poly(D-lactide) blocks and highly incompatible corona-forming blocks (polystyrene (PS), poly(tert-butyl methacrylate)) is introduced. The spherical patchy SC micelles feature a narrow size distribution and show a compartmentalized, shamrock-like corona structure. Compared to SC micelles with a homogeneous PS corona the patchy micelles have a significantly higher interfacial activity attributable to the synergistic combination of an amphiphilic corona with the Pickering effect of nanoparticles. The patchy micelles are successfully employed in the stabilization of emulsions, underlining their application potential.
表面分区化胶束（Janus胶束、补丁状胶束）独特的冠状结构开启了高度相关的应用，例如作为用于乳液稳定或聚合物共混物增容的高效颗粒表面活性剂。在此，引入了立体复合驱动的自组装（SCDSA），这是一种制备具有半结晶立体复合物（SC）核和补丁状微相分离冠状结构胶束的简便方法，采用具有对映体聚（L-丙交酯）/聚（D-丙交酯）嵌段和高度不相容的冠状形成嵌段（聚苯乙烯（PS）、聚（甲基丙烯酸叔丁酯））的二嵌段共聚物。球形补丁状SC胶束具有窄尺寸分布，并呈现出分区化的三叶草状冠状结构。与具有均匀PS冠状结构的SC胶束相比，补丁状胶束具有显著更高的界面活性，这归因于两亲性冠状结构与纳米颗粒的皮克林效应的协同组合。补丁状胶束成功用于乳液的稳定，突出了它们的应用潜力。
