Self-Assembly of Amphiphilic Homopolymers Bearing Ferrocene and Carboxyl Functionalities: Effect of Polymer Concentration, β-Cyclodextrin, and Length of Alkyl Linker

Langmuir ◽  
2013 ◽  
Vol 29 (34) ◽  
pp. 10922-10931 ◽  
Author(s):  
Chun Feng ◽  
Guolin Lu ◽  
Yongjun Li ◽  
Xiaoyu Huang
Keyword(s):  
Self Assembly ◽  
Polymer Concentration ◽  
Amphiphilic Homopolymers

Orientation- and cosolvent-induced self-assembly of amphiphilic homopolymers in selective solvents

Polymer ◽  
2021 ◽  
Vol 232 ◽  
pp. 124160
Author(s):  
Aleksandr I. Buglakov ◽  
Daniil E. Larin ◽  
Valentina V. Vasilevskaya
Keyword(s):  
Self Assembly ◽  
Selective Solvents ◽  
Amphiphilic Homopolymers

scholarly journals Complex Temperature and Concentration Dependent Self-Assembly of Poly(2-oxazoline) Block Copolymers

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1495 ◽  
Author(s):  
Loan Trinh Che ◽  
Marianne Hiorth ◽  
Richard Hoogenboom ◽  
Anna-Lena Kjøniksen
Keyword(s):  
High Temperatures ◽  
Self Assembly ◽  
Low Temperatures ◽  
Polymer Concentration ◽  
Random Copolymer ◽  
Polymer Chains ◽  
Relaxation Modes ◽  
Self Association ◽  
Copolymer Structure ◽  
Complex Temperature

The effect of polymer concentration on the temperature-induced self-association of a block copolymer comprising a poly(2-ethyl-2-oxazoline) block and a random copolymer block consisting of 2-ethyl-2-oxazoline and 2-n-propyl-2-oxazoline (PEtO80-block-P(EtOxx-stat-PropO40-x) with x = 0, 4, or 8 were investigated by dynamic light scattering (DLS) and transmittance measurements (turbidimetry). The polymers reveal a complex aggregation behavior with up to three relaxation modes in the DLS data and with a transmittance that first goes through a minimum before it declines at high temperatures. At low temperatures, unassociated polymer chains were found to co-exist with larger aggregates. As the temperature is increased, enhanced association and contraction of the aggregates results in a drop of the transmittance values. The aggregates fragment into smaller micellar-like clusters when the temperature is raised further, causing the samples to become optically clear again. At high temperatures, the polymers aggregate into large compact clusters, and the samples become turbid. Interestingly, very large aggregates were observed at low temperatures when the polymer concentrations were low. The formation of these aggregates was also promoted by a more hydrophilic copolymer structure. The formation of large aggregates with an open structure at conditions where the solvent conditions are improved is probably caused by depletion flocculation of the smaller aggregates.

pH-responsive self-assembly of fluorophore-ended homopolymers

2014 ◽  
Vol 50 (56) ◽  
pp. 7511-7513 ◽  
Author(s):  
Jin Zhang ◽  
Shusen You ◽  
Shouke Yan ◽  
Klaus Müllen ◽  
Wantai Yang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Ph Responsive ◽  
Ph Adjustment ◽  
Amphiphilic Homopolymers

pH-responsive perylene-ended amphiphilic homopolymers can self-assemble into flower-like structures by the pH-adjustment.

Self-assembly of poly(ionic liquid) (PIL)-based amphiphilic homopolymers into vesicles and supramolecular structures with dyes and silver nanoparticles

2017 ◽  
Vol 8 (22) ◽  
pp. 3497-3503 ◽  
Author(s):  
Kasina Manojkumar ◽  
David Mecerreyes ◽  
Daniel Taton ◽  
Yves Gnanou ◽  
Kari Vijayakrishna
Keyword(s):  
Silver Nanoparticles ◽  
Ionic Liquid ◽  
Self Assembly ◽  
Supramolecular Structures ◽  
Poly Ionic Liquid ◽  
Amphiphilic Homopolymers

Self assembly of amphiphilic homo-PILs.

Microstructures of Poly (9'9-Dihexylfluorene) Grown in the Non-Solvent Vapor

2014 ◽  
Vol 936 ◽  
pp. 53-57 ◽  
Author(s):  
Xue Qing Xiao ◽  
Wei Bin Bai ◽  
Jin Huo Lin
Keyword(s):  
Self Assembly ◽  
Polymer Concentration ◽  
Solvent Vapor ◽  
Poor Solvent

In this research, the microspheres of poly (99-dihexylfluorene) were fabricated with dichloromethane as a good solvent by self-assembly methods. The effects of poor solvent vapor, polymer concentration, and the temperature of environment on the formation of the sphere patterns were investigated. It was found that the microsphere could be easily prepared in the ethanol non-solvent vapor atmosphere. Besides, increasing the environment temperatures was advantageous to fabricate microspheres. Furthermore, the property of non-solvent vapor was a key role to the formation of the sphere.

scholarly journals Electrospinning Processing Techniques for the Manufacturing of Composite Dielectric Elastomer Fibers

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6288
Author(s):  
Mirella Ramirez ◽  
Louis Vaught ◽  
Chiu Law ◽  
Jacob L. Meyer ◽  
Rani Elhajjar
Keyword(s):  
Self Assembly ◽  
Direct Synthesis ◽  
Polymer Concentration ◽  
Artificial Muscle ◽  
Dielectric Elastomer ◽  
Solution Viscosity ◽  
Viscous Polymer ◽  
Processing Techniques ◽  
The Impact ◽  
Protective Textiles

Dielectric elastomers (DE) are novel composite architectures capable of large actuation strains and the ability to be formed into a variety of actuator configurations. However, the high voltage requirement of DE actuators limits their applications for a variety of applications. Fiber actuators composed of DE fibers are particularly attractive as they can be formed into artificial muscle architectures. The interest in manufacturing micro or nanoscale DE fibers is increasing due to the possible applications in tissue engineering, filtration, drug delivery, catalysis, protective textiles, and sensors. Drawing, self-assembly, template-direct synthesis, and electrospinning processing have been explored to manufacture these fibers. Electrospinning has been proposed because of its ability to produce sub-mm diameter size fibers. In this paper, we investigate the impact of electrospinning parameters on the production of composite dielectric elastomer fibers. In an electrospinning setup, an electrostatic field is applied to a viscous polymer solution at an electrode’s tip. The polymer composite with carbon black and carbon nanotubes is expelled and accelerated towards a collector. Factors that are considered in this study include polymer concentration, solution viscosity, flow rate, electric field intensity, and the distance to the collector.

Self-Assembly Behavior of Oligo(ethylene glycol) Substituted Polycaprolactone Homopolymers

2021 ◽  
Author(s):  
Mihaela C. Stefan ◽  
Erika Calubaquib ◽  
Pooneh Soltantabar ◽  
Hanghang Wang ◽  
Heejin Shin ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Self Assembly ◽  
Assembly Behavior ◽  
Amphiphilic Homopolymers

Amphiphilic homopolymers are gaining importance due to their easy synthesis compared to copolymers and their ability to assemble into various nanostructures. The majority of reported amphiphilic homopolymers have a non-biodegradable...

Novel amphiphilic homopolymers containing meta- and para- pyridine moieties with living characteristics and their self-assembly

2013 ◽  
Vol 51 (16) ◽  
pp. 3458-3469 ◽  
Author(s):  
Yoon-Hyung Hur ◽  
Nam-Goo Kang ◽  
Beom-Goo Kang ◽  
Yong-Guen Yu ◽  
Mohammed Changez ◽  
...  
Keyword(s):  
Self Assembly ◽  
Amphiphilic Homopolymers
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