TY - JOUR
T1 - Stimuli-responsive fiber-like micelles from the self-assembly of well-defined rod-coil block copolymer
AU - Zhou, Mi
AU - Li, Jie
AU - Zhang, Honghai
AU - Hong, Kunlun
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/6
Y1 - 2018/6
N2 - A series of photoluminescent fiber-like micelles were obtained in solutions via self-assembly of well-defined rod-coil block copolymers, poly[2,7-(9,9-dihexyl-fuorene)]-b-poly[2-(dimethylamino)ethyl methacrylate] (PFH-b-PDMAEMA), which prepared by combining controlled Suzuki-coupling and atom transfer radical polymerization (ATRP) in a “double controlled” manner. The length of micelles can be varied by changing the solvent mixtures, probably because of the H-type aggregation of the PFH block. The morphology and photoluminescence of these micelles were pH- or temperature-responsive in aqueous. The fluorescence intensity increased with temperature increased and became stronger as the pH increased (pH < 9) but reduced again when the pH further increased (pH > 9). And the morphologies of micelles transited into shorter linear or shuttle-like structures with the change of pH and showed aggregation as temperature-induced. These phenomena may be mainly caused by the structure of micelles and the effect of hydrophillic-hydrophobic transformation of the PDMAEMA corona. Our work provides a push to the synthesis and self-assembly of well-defined rod-coil polymer, and also provides insights into the stimuli-responsive properties of fiber-like micelles.
AB - A series of photoluminescent fiber-like micelles were obtained in solutions via self-assembly of well-defined rod-coil block copolymers, poly[2,7-(9,9-dihexyl-fuorene)]-b-poly[2-(dimethylamino)ethyl methacrylate] (PFH-b-PDMAEMA), which prepared by combining controlled Suzuki-coupling and atom transfer radical polymerization (ATRP) in a “double controlled” manner. The length of micelles can be varied by changing the solvent mixtures, probably because of the H-type aggregation of the PFH block. The morphology and photoluminescence of these micelles were pH- or temperature-responsive in aqueous. The fluorescence intensity increased with temperature increased and became stronger as the pH increased (pH < 9) but reduced again when the pH further increased (pH > 9). And the morphologies of micelles transited into shorter linear or shuttle-like structures with the change of pH and showed aggregation as temperature-induced. These phenomena may be mainly caused by the structure of micelles and the effect of hydrophillic-hydrophobic transformation of the PDMAEMA corona. Our work provides a push to the synthesis and self-assembly of well-defined rod-coil polymer, and also provides insights into the stimuli-responsive properties of fiber-like micelles.
KW - Fiber-like micelles
KW - Rod-coil block copolymer
KW - Stimuli-responsiveness
UR - http://www.scopus.com/inward/record.url?scp=85046373888&partnerID=8YFLogxK
U2 - 10.1016/j.eurpolymj.2018.04.004
DO - 10.1016/j.eurpolymj.2018.04.004
M3 - Article
AN - SCOPUS:85046373888
SN - 0014-3057
VL - 103
SP - 304
EP - 311
JO - European Polymer Journal
JF - European Polymer Journal
ER -