Morphology transitions of supramolecular hyperbranched polymers induced by double supramolecular driving forces

Tuning the morphology of supramolecular hyperbranched polymers (SHPs) in solution has theoretical and practical significance in SHP applications. This study successfully achieved SHP morphology transitions from branched supramolecular structures to spherical nanosized micelles in mixed solvents. Tra...

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Published inPolymer chemistry Vol. 6; no. 5; pp. 732 - 737
Main Authors Bai, Yang, Fan, Xiao-dong, Tian, Wei, Liu, Ting-ting, Yao, Hao, Yang, Zhen, Zhang, Hai-tao, Zhang, Wan-bin
Format Journal Article
LanguageEnglish
Published 01.01.2015
Subjects
Inclusions
Micelles
Monomers
Morphology
Nanostructure
Polymers
Solvents
Tuning
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Summary:Tuning the morphology of supramolecular hyperbranched polymers (SHPs) in solution has theoretical and practical significance in SHP applications. This study successfully achieved SHP morphology transitions from branched supramolecular structures to spherical nanosized micelles in mixed solvents. Transmission electron microscopy, dynamic light scattering, 2D 1 H NMR ROESY, and fluorescence emission spectroscopy confirmed these transitions. An AB 2 -type amphiphilic β-cyclodextrin (β-CD) monomer (Ada-CD 2 ) exhibiting double supramolecular interactions was initially synthesized. SHPs based on Ada-CD 2 were then formed in DMF–H 2 O mixed solvents through the host–guest inclusion interaction between β-CD and Ada. The formed SHPs disassembled with the addition of adamantane carboxylic sodium salt, which was a competitive guest. The SHPs reassembled into core–shell structured micelles based on the hydrophilic–hydrophobic interaction of the amphiphilic Ada-CD 2 monomer.
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ISSN:1759-9954
1759-9962
DOI:10.1039/C4PY01092B