From multi-responsive tri- and diblock copolymers to diblock-copolymer-decorated gold nanoparticles: the effect of architecture on micellization behaviors in aqueous solutions

Soft Matter ◽  
2015 ◽  
Vol 11 (24) ◽  
pp. 4830-4839 ◽  
Author(s):  
Lichun Song ◽  
Hui Sun ◽  
Xiaolu Chen ◽  
Xia Han ◽  
Honglai Liu
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Diblock Copolymers ◽  
Stimuli Responsive ◽  
Aba Triblock Copolymer

This work reports on the aqueous stimuli-responsive behaviors of an ABA triblock copolymer, a BAB triblock copolymer, an AB diblock copolymer and citrate-based gold nanoparticles decorated with AB diblock copolymers.

Sticky ends in a self-assembling ABA triblock copolymer: the role of ureas in stimuli-responsive hydrogels

2019 ◽  
Vol 4 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Ryan T. Shafranek ◽  
Joel D. Leger ◽  
Song Zhang ◽  
Munira Khalil ◽  
Xiaodan Gu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Viscoelastic Properties ◽  
Triblock Copolymer ◽  
Thermal Response ◽  
Stimuli Responsive ◽  
Self Assembling ◽  
Polymeric Hydrogels ◽  
Aba Triblock Copolymer ◽  
Responsive Hydrogels

Directed self-assembly in polymeric hydrogels allows tunability of thermal response and viscoelastic properties.

Temperature-Dependent Optical Properties of Gold Nanoparticles Coated with a Charged Diblock Copolymer and an Uncharged Triblock Copolymer

ACS Nano ◽  
2010 ◽  
Vol 4 (2) ◽  
pp. 1187-1201 ◽  
Author(s):  
Sondre Volden ◽  
Anna-Lena Kjøniksen ◽  
Kaizheng Zhu ◽  
Jan Genzer ◽  
Bo Nyström ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Temperature Dependent

Polyethyleneimine and Poly(ethylene glycol) Functionalized Oligoester Based Polycationic Particles

MRS Advances ◽  
2018 ◽  
Vol 3 (50) ◽  
pp. 3033-3040
Author(s):  
Magdalena Mazurek-Budzynska ◽  
Maria Balk ◽  
Marc Behl ◽  
Andreas Lendlein
Keyword(s):  
Zeta Potential ◽  
Ethylene Glycol ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Diblock Copolymers ◽  
Copolymer Composition ◽  
Surface Charges ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Carrier Systems

ABSTRACTPolycationic particles based on a degradable oligoester core are interesting candidate materials for the transfection of polyanionic macromolecules like DNA, which would enable the degradation after delivery of condensed molecules. Good transfection efficiencies can be obtained when the size of the polyplex (containing both polycationic nanoparticles and polyanionic macromolecules) does not exceed 120 nm. Therefore, here we explored how size, but also dispersity, and surface charge of these carrier systems can be adjusted by variation of the block copolymer composition or the presence and ratio of a co-assembly agent. Polycationic particles were obtained based on an amphiphilic triblock copolymer from oligo[(ε-caprolactone)-co-glycolide] (CG) functionalized with polyethyleneimine (PEI) and diblock copolymer based on poly(ethylene glycol) (PEG) modified with CG. A second series of particles was created, in which the oligoester blocks contained only ε-caprolactone units, therefore the effect of the presence of glycolide units was also studied. In both series, the ratio between di- and triblock copolymers was systematically varied. Nano-sized particles ranging from 34.5 ± 0.2 nm to 97.9 ± 0.3 nm with controllable positive surface charges between 2.9 ± 0.2 mV and 18.1 ± 0.5 mV were obtained by self-assembly in PBS solution under intensive stirring. The incorporation of PEG-C diblock copolymers resulted in an increase of particle size, however no specific relation between composition, size, and polydispersity was observed. In case of PEG-CG diblock copolymers a rather systematic increase of the particles’ size with increasing content of diblock copolymer was shown. Furthermore, with a decrease of content of diblock copolymer in the particle structure zeta potential strongly increased. Additionally, the content of glycolide units in triblock copolymer increased the zeta potential of PEI-CG-PEI-based particles in comparison to PEI-C-PEI-based ones. Therefore, obtained particles could be used as potential target-oriented polycationic macromolecules for carrier systems.

A mussel-inspired catecholic ABA triblock copolymer exhibits better antifouling properties compared to a diblock copolymer

2020 ◽  
Vol 11 (28) ◽  
pp. 4622-4629
Author(s):  
Yadan Zhai ◽  
Xueqian Chen ◽  
Zhaobin Yuan ◽  
Xia Han ◽  
Honglai Liu
Keyword(s):  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Aba Triblock Copolymer

The scheme of the chemical architecture, aggregation, assembly and antifouling properties of two copolymers.

Synthesis of stimuli responsive PEG47–b-PAA126–b-PSt32 triblock copolymer and its self-assembly in aqueous solutions

2013 ◽  
Vol 49 (1) ◽  
pp. 209-216 ◽  
Author(s):  
S. Chavda ◽  
S. Yusa ◽  
M. Inoue ◽  
L. Abezgauz ◽  
E. Kesselman ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Self Assembly ◽  
Triblock Copolymer ◽  
Stimuli Responsive

Stimuli responsive nanostructured porous network from triblock copolymer self-assemblies

2015 ◽  
Vol 6 (11) ◽  
pp. 2023-2028 ◽  
Author(s):  
Zineb Mouline ◽  
Mona Semsarilar ◽  
Andre Deratani ◽  
Damien Quemener
Keyword(s):  
Boronic Acid ◽  
Triblock Copolymer ◽  
Stimuli Responsive ◽  
Porous Network ◽  
Aba Triblock Copolymer

Well controlled ABA triblock copolymer with pendent boronic acid groups is prepared using RAFT chemistry. The resulting flower like micelles in mixture of H2O/NMP forms stimuli responsive porous network.

Thermoresponsive Amphiphilic Diblock Copolymers Synthesized by MADIX/RAFT: Properties in Aqueous Solutions and Use for the Preparation and Stabilization of Gold Nanoparticles

2010 ◽  
Vol 22 (12) ◽  
pp. 3712-3724 ◽  
Author(s):  
Stéphanie Sistach ◽  
Mariana Beija ◽  
Virginie Rahal ◽  
Annie Brûlet ◽  
Jean-Daniel Marty ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Diblock Copolymers ◽  
Amphiphilic Diblock Copolymers

Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes

2019 ◽  
Author(s):  
Yanchun Tang ◽  
Kohzo Ito ◽  
Hideaki Yokoyama
Keyword(s):  
Polymer Brushes ◽  
Diblock Copolymers ◽  
Neutron Reflectivity ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
The Matrix ◽  
Stable Part ◽  
Copolymer Brushes ◽  
Mesoporous Membranes

In this study, we prepared ultrafiltration membranes with a decoupled responses of filtration property to temperature and pH. The membrane preparation method was developed based on our previous work. We utilized methanol-supercritical carbon dioxide (methanol-scCO<sub>2</sub>) selective swelling method to introduce nanopores to block copolymers containing poly(diethylene glycol) methyl ether methacrylate (PMEO<sub>2</sub>MA), poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) and polystyrene (PS) blocks. Formation of the mesoporous barrier layer with PS being the mechanically stable part of the matrix was driven by selective swelling of the PMEO<sub>2</sub>MA-b-PDMAEMA domains. Due to the selective swelling of PMEO<sub>2</sub>MA or PDMAEMA domains to introduce pores, the interior of the pores are covered with PMEO<sub>2</sub>MA or PDMAEMA blocks after pore formation. The PMEO<sub>2</sub>MA-b-PDMAEMA polymer brushes are naturally attached on the pore walls and worked as functional gates. PMEO<sub>2</sub>MA is a non-toxic, neutral thermo-responsive polymer with LCST at 26 ᴼC. PDMAEMA is a typical weak polyelectrolyte with pK<sub>a</sub> value at 7.0-7.5 and also a thermo-responsive polymer revealed a LCST of 20-80 °C in aqueous solution. Therefore, these membranes were expected to have multi dimensions as function of the combination of temperature and pH. Moreover, to understand the detail of the temperature and pH depended conformation transitions of PMEO<sub>2</sub>MA-b-PDMAEMA brushes, those diblock copolymers were end-tethered on flat substrates and analyzed via neutron reflectivity (NR).

Association and physical gelation of ABA triblock copolymer in selective solvent

Polymer ◽  
2003 ◽  
Vol 44 (18) ◽  
pp. 5303-5310 ◽  
Author(s):  
Katsuhiro Inomata ◽  
Daisuke Nakanishi ◽  
Ai Banno ◽  
Eiji Nakanishi ◽  
Yosuke Abe ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Selective Solvent ◽  
Physical Gelation ◽  
Aba Triblock Copolymer

scholarly journals Dissipative Particle Dynamics Study on Interfacial Properties of Symmetric Ternary Polymeric Blends

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1516
Author(s):  
Dongmei Liu ◽  
Kai Gong ◽  
Ye Lin ◽  
Tao Liu ◽  
Yu Liu ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Chain Length ◽  
Triblock Copolymer ◽  
Diblock Copolymers ◽  
Triblock Copolymers ◽  
Dissipative Particle Dynamics ◽  
Interfacial Properties ◽  
Particle Dynamics ◽  
Polymeric Blends ◽  
Polymer Component

We investigated the interfacial properties of symmetric ternary An/AmBm/Bn and An/Am/2BmAm/2/Bn polymeric blends by means of dissipative particle dynamics (DPD) simulations. We systematically analyzed the effects of composition, chain length, and concentration of the copolymers on the interfacial tensions, interfacial widths, and the structures of each polymer component in the blends. Our simulations show that: (i) the efficiency of the copolymers in reducing the interfacial tension is highly dependent on their compositions. The triblock copolymers are more effective in reducing the interfacial tension compared to that of the diblock copolymers at the same chain length and concentration; (ii) the interfacial tension of the blends increases with increases in the triblock copolymer chain length, which indicates that the triblock copolymers with a shorter chain length exhibit a better performance as the compatibilizers compared to that of their counterparts with longer chain lengths; and (iii) elevating the triblock copolymer concentration can promote copolymer enrichment at the center of the interface, which enlarges the width of the phase interfaces and reduces the interfacial tension. These findings illustrate the correlations between the efficiency of copolymer compatibilizers and their detailed molecular parameters.

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