scholarly journals Fully amorphous atactic and isotactic block copolymers and their self-assembly into nano- and microscopic vesicles

2021 ◽  
Vol 12 (37) ◽  
pp. 5377-5389
Author(s):  
Riccardo Wehr ◽  
Elena C. dos Santos ◽  
Moritz S. Muthwill ◽  
Vittoria Chimisso ◽  
Jens Gaitzsch ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Membrane Properties ◽  
Giant Unilamellar Vesicles ◽  
Unilamellar Vesicles ◽  
Amphiphilic Diblock Copolymers

Analysis of the membrane properties and stability of fully amorphous small and giant unilamellar vesicles composed of atactic or isotactic poly(butylene oxide)-block-poly(glycidol) (PBO-b-PG) amphiphilic diblock copolymers.

scholarly journals Preparation of well-defined 2D-lenticular aggregates by self-assembly of PNIPAM-b-PVDF amphiphilic diblock copolymers in solution

2021 ◽  
Author(s):  
Enrique Folgado ◽  
Matthias Mayor ◽  
Didier Cot ◽  
Michel Ramonda ◽  
Franck Godiard ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Dimethyl Carbonate ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers ◽  
Amphiphilic Diblock Copolymers

PNIPAM-b-PVDF amphiphilic block copolymers were synthesized via RAFT polymerization in dimethyl carbonate. These block copolymers were able to self-assemble into various morphologies such as spherical, crumpled, lamellar and lenticular 2D aggregates.

Amphiphilic Diblock Copolymers of Poly(glycidol) with Biodegradable Polyester/Polycarbonate. Organocatalytic One-Pot ROP and Self-Assembling Property

2021 ◽  
Author(s):  
Tingyu He ◽  
Atsushi Narumi ◽  
Yanqiu Wang ◽  
Liang Xu ◽  
Shin-ichiro Sato ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Synthetic Method ◽  
Biodegradable Polyester ◽  
One Pot ◽  
Self Assembling ◽  
Amphiphilic Diblock Copolymers

A synthetic method for a series of poly(glycidol) (PG)-based amphiphilic block copolymers is presented with an emphasis on the catalyst switch method from an organic superbase (t-Bu-P4) to another with...

scholarly journals The combination of block copolymers and phospholipids to form giant hybrid unilamellar vesicles (GHUVs) does not systematically lead to “intermediate” membrane properties

Soft Matter ◽  
2018 ◽  
Vol 14 (31) ◽  
pp. 6476-6484 ◽  
Author(s):  
T. P. T. Dao ◽  
F. Fernandes ◽  
M. Fauquignon ◽  
E. Ibarboure ◽  
M. Prieto ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Triblock Copolymer ◽  
Membrane Properties ◽  
Unilamellar Vesicles

The combination of a triblock copolymer and phospholipids to form GHUVs leads to an unexpected decrease of vesicle toughness.

Synthesis, characterization and association behavior of linear-dendritic amphiphilic diblock copolymers based on poly(ethylene oxide) and a dendron derived from 2,2′-bis(hydroxymethyl)propionic acid

2015 ◽  
Vol 6 (12) ◽  
pp. 2274-2282 ◽  
Author(s):  
Weiwei Zhang ◽  
Weiwei Jiang ◽  
Delong Zhang ◽  
Guangyue Bai ◽  
Pengxiao Lou ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Propionic Acid ◽  
Diblock Copolymers ◽  
Association Behavior ◽  
Poly Ethylene Oxide ◽  
Amphiphilic Diblock Copolymers ◽  
Poly Ethylene

Two new amphiphilic linear-dendritic block copolymers have been synthesized and characterized. And their association behaviors have also been studied.

scholarly journals Large and Giant Unilamellar Vesicle(s) Obtained by Self-Assembly of Poly(dimethylsiloxane)-b-poly(ethylene oxide) Diblock Copolymers, Membrane Properties and Preliminary Investigation of Their Ability to Form Hybrid Polymer/Lipid Vesicles

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2013 ◽  
Author(s):  
Martin Fauquignon ◽  
Emmanuel Ibarboure ◽  
Stéphane Carlotti ◽  
Annie Brûlet ◽  
Marc Schmutz ◽  
...  
Keyword(s):  
Light Scattering ◽  
Ethylene Oxide ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Lipid Vesicles ◽  
Membrane Properties ◽  
Membrane Thickness ◽  
Hybrid Polymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

In the emerging field of hybrid polymer/lipid vesicles, relatively few copolymers have been evaluated regarding their ability to form these structures and the resulting membrane properties have been scarcely studied. Here, we present the synthesis and self-assembly in solution of poly(dimethylsiloxane)-block-poly(ethylene oxide) diblock copolymers (PDMS-b-PEO). A library of different PDMS-b-PEO diblock copolymers was synthesized using ring-opening polymerization of hexamethylcyclotrisiloxane (D3) and further coupling with PEO chains via click chemistry. Self-assembly of the copolymers in water was studied using Dynamic Light Scattering (DLS), Static Light Scattering (SLS), Small Angle Neutron Scattering (SANS), and Cryo-Transmission Electron Microscopy (Cryo-TEM). Giant polymersomes obtained by electroformation present high toughness compared to those obtained from triblock copolymer in previous studies, for similar membrane thickness. Interestingly, these copolymers can be associated to phospholipids to form Giant Hybrid Unilamellar Vesicles (GHUV); preliminary investigations of their mechanical properties show that tough hybrid vesicles can be obtained.

Block copolymers in giant unilamellar vesicles with proteins or with phospholipids

2013 ◽  
Vol 166 ◽  
pp. 303 ◽  
Author(s):  
Regina Schöps ◽  
Elkin Amado ◽  
Sophie S. Müller ◽  
Holger Frey ◽  
Jörg Kressler
Keyword(s):  
Block Copolymers ◽  
Giant Unilamellar Vesicles ◽  
Unilamellar Vesicles

1998 E.W.R. Steacie Award Lecture Asymmetric amphiphilic block copolymers in solution: a morphological wonderland

1999 ◽  
Vol 77 (8) ◽  
pp. 1311-1326 ◽  
Author(s):  
Neil S Cameron ◽  
Muriel K Corbierre ◽  
Adi Eisenberg
Keyword(s):  
Self Assembly ◽  
Diblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Polymer Composition ◽  
Selective Solvents ◽  
Thermodynamic And Kinetic Parameters ◽  
Amphiphilic Diblock Copolymers ◽  
Systematic Understanding ◽  
Selection Of ◽  
Qualitative Discussion

Asymmetric amphiphilic diblock copolymers self-assemble in selective solvents. Since 1995, when we first reported the systematic preparation of a sequence of various "crew-cut" aggregate morphologies from this class of copolymer in solution (1), we have identified a vast array of structures and have begun a detailed investigation of the thermodynamic and kinetic parameters that induce morphogenesis. Not only spheres, rods, bilayer and bicontinuous architectures, as well as inverted structures are observed, but also a selection of mixed, combined and much more complex aggregates is documented. All of these aggregates have a phase-separated insoluble core and a crew-cut soluble corona. Thus, all parameters that permit selective modification of the component of either phase or of the interface provide a window for morphological control. By carefully adjusting the polymer chain environment, it has been possible to develop a systematic understanding of morphogenic parameters, which include, among others, polymer composition, common solvent, initial concentration, temperature, type and concentration of added ions, method of preparation, and added homopolymer. To date, more than 30 publications have appeared in the literature from our group alone on this subject. One of the problems inherent with such a complicated system is the taxonomy or classification: which morphologies correspond to equilibrium positions and which are intermediate or trapped? An attempt at a logical presentation of the observed aggregates is given, preceded by a qualitative discussion of the thermodynamic framework for this system. Where possible, the transitions between morphologies are explained in the context of the thermodynamic parameters. Finally, parallels are drawn between the copolymer aggregates and biological architectures.Key words: crew-cut, morphology, block copolymer, self-assembly, amphiphile.

scholarly journals Uniform electroactive fibre-like micelle nanowires for organic electronics

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Xiaoyu Li ◽  
Piotr J. Wolanin ◽  
Liam R. MacFarlane ◽  
Robert L. Harniman ◽  
Jieshu Qian ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Charge Carrier ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Field Effect Transistors ◽  
Fibre Length ◽  
Charge Carrier Mobility ◽  
Degree Of Polymerization ◽  
Selective Solvents ◽  
The Individual

Abstract Micelles formed by the self-assembly of block copolymers in selective solvents have attracted widespread attention and have uses in a wide variety of fields, whereas applications based on their electronic properties are virtually unexplored. Herein we describe studies of solution-processable, low-dispersity, electroactive fibre-like micelles of controlled length from π-conjugated diblock copolymers containing a crystalline regioregular poly(3-hexylthiophene) core and a solubilizing, amorphous regiosymmetric poly(3-hexylthiophene) or polystyrene corona. Tunnelling atomic force microscopy measurements demonstrate that the individual fibres exhibit appreciable conductivity. The fibres were subsequently incorporated as the active layer in field-effect transistors. The resulting charge carrier mobility strongly depends on both the degree of polymerization of the core-forming block and the fibre length, and is independent of corona composition. The use of uniform, colloidally stable electroactive fibre-like micelles based on common π-conjugated block copolymers highlights their significant potential to provide fundamental insight into charge carrier processes in devices, and to enable future electronic applications.

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