Université de Fribourg

Hierarchical self-organization in polyelectrolyte-surfactant complexes based on heteroarm star block copolyampholytes

Hammond, Matthew R. ; Li, Chaoxu ; Tsitsilianis, Constantinos ; Mezzenga, Raffaele

In: Soft Matter, 2009, vol. 5, no. 12, p. 2371-2377

A novel heteroarm star block terpolymer bearing short polystyrene (PS) arms and an equal number of longer poly(2-vinylpyridine)-block-poly(acrylic acid) (P2VP-b-PAA) arms was used as the macromolecular template component in polyelectrolyte-surfactant supramolecular complexes. The ampholytic nature of this novel star block copolymer allowed complexation to be carried out on either the P2VP blocks...

Université de Fribourg

Supramolecular routes towards liquid crystalline side-chain polymers

Hammond, Matthew R. ; Mezzenga, Raffaele

In: Soft Matter, 2008, vol. 4, p. 952-961

Supramolecular attachment of mesogenic or non-mesogenic side chains to polymer backbones can result in the formation of liquid crystalline morphologies. The various parameters that can be tuned in order to achieve these morphologies, such as the type of non-covalent bonding chemistry (hydrogen bonding, ionic bonding, metal coordination, π–π interactions), the polymeric template architecture,...

Université de Fribourg

Self-organization on multiple length scales in "hairy rod"-coil block copolymer supramolecular complexes

Hammond, Matthew R. ; Klok, Harm-Anton ; Mezzenga, Raffaele

In: Macromolecular Rapid Communications, 2008, vol. 29, no. 4, p. 299-303

A peptide-synthetic hybrid block copolymer, poly(ethylene oxide)-block-poly(L-glutamic acid), is shown to form supramolecular complexes with primary alkylamines of varying alkyl chain lengths (8 to 18 methylene units) in organic solvents via acid-base proton transfer and subsequent ionic bonding. The peptidic block being in the α-helical conformation, these materials behave as...