title: Facile fabrication of narrowly-distributed polymeric micelles via host-guest inclusion complexation of hyperbranched polymers and cyclodextrin and its two-dimensional self-assembly.
abstract: A novel narrowly-distributed (ND) polymeric micelle obtained in combination with host-guest recognition and self-assembly is reported. First, the adamantyl-terminated hyperbranched poly[3-ethyl-3-(hydroxymethyl)oxetane] (HBPO-AD) was synthesized by esterification of hyperbranched poly[3-ethyl-3-(hydroxymethyl)oxetane] (HBPO) with 1-adamantanecarbonyl chloride. Then the ND polymeric core-shell micelles, with the hydrophobic HBPO-AD cores and hydrophilic beta-cyclodextrin (β-CD) shells, were prepared via host-guest inclusion complexation of HBPO-AD and β-CD. The resultant polymer micelles were well characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Interestingly, after annealing at a temperature above the glass transition temperature (T(g)) for a certain time, the polymeric micelles can further self-assemble and fuse into two-dimensional (2D) sheets. The TEM, SEM and atomic force microscopy (AFM) characterization validate that the sheets are formed through stacking and fusion of tightly packed nanoparticles. In addition, the formation mechanism of polymeric complex micelles and 2D sheets has also been discussed.
authors: School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
authors: Xiaoyi
authors: X
authors: Sun
authors: Wei
authors: W
authors: Huang
authors: Yongfeng
authors: Y
authors: Zhou
authors: Deyue
authors: D
authors: Yan
mesh_terms: D000218:Adamantane / Q000031:analogs & derivatives; D008823:Micelles; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011409:Propylene Glycols / Q000138:chemical synthesis / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D008823:Micelles; D011108:Polymers; D011409:Propylene Glycols; D047392:beta-Cyclodextrins; C524812:poly(oxetane); C031215:betadex; D000218:Adamantane