Thermodynamically stable, size selective solubilization of carbon nanotubes in aqueous solutions of amphiphilic block copolymers

2009 ◽  
Vol 131 (10) ◽  
pp. 104906 ◽  
Author(s):  
R. Nagarajan ◽  
R. Ashton Bradley ◽  
Bindu R. Nair
Keyword(s):  
Carbon Nanotubes ◽  
Block Copolymers ◽  
Aqueous Solutions ◽  
Amphiphilic Block Copolymers

scholarly journals Polystyrene–Poly(sodium methacrylate) Amphiphilic Block Copolymers by ATRP: Effect of Structure, pH, and Ionic Strength on Rheology of Aqueous Solutions

2013 ◽  
Vol 46 (17) ◽  
pp. 7106-7111 ◽  
Author(s):  
Patrizio Raffa ◽  
Piter Brandenburg ◽  
Diego A. Z. Wever ◽  
Antonius A. Broekhuis ◽  
Francesco Picchioni
Keyword(s):  
Ionic Strength ◽  
Block Copolymers ◽  
Aqueous Solutions ◽  
Amphiphilic Block Copolymers ◽  
Effect Of Structure ◽  
Sodium Methacrylate

Pressure-induced reentrant micellization of amphiphilic block copolymers in dilute aqueous solutions

2007 ◽  
Vol 127 (9) ◽  
pp. 094905 ◽  
Author(s):  
Noboru Osaka ◽  
Sho Miyazaki ◽  
Satoshi Okabe ◽  
Hitoshi Endo ◽  
Aya Sasai ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Aqueous Solutions ◽  
Amphiphilic Block Copolymers ◽  
Dilute Aqueous Solutions

scholarly journals Design of a pH-Responsive Conductive Nanocomposite Based on MWCNTs Stabilized in Water by Amphiphilic Block Copolymers

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1410 ◽  
Author(s):  
den Hoed ◽  
Pucci ◽  
Picchioni ◽  
Raffa
Keyword(s):  
Carbon Nanotubes ◽  
Block Copolymers ◽  
Acrylic Acid ◽  
Zeta Potential ◽  
Amphiphilic Block Copolymers ◽  
Ph Responsive ◽  
Potential Applications ◽  
Multi Walled Carbon Nanotubes ◽  
Responsive Behavior ◽  
Walled Carbon Nanotubes

Homogeneous water dispersions of multi-walled carbon nanotubes (MWCNTs) were prepared by ultrasonication in the presence of an amphiphilic polystyrene-block-poly(acrylic acid) (PS-b-PAA) copolymer. The ability of PS-b-PAA to disperse and stabilize MWCTNs was investigated by UV-vis, SEM and zeta potential. The results show that the addition of a styrene block to PAA enhances the dispersion efficiency of the graphitic filler compared to pure PAA, possibly due to the nanotube affinity with the polystyrene moiety. Notably, the dispersions show an evident pH-responsive behavior, being MWCNTs reaggregation promoted in basic environment. It is worth noting that the responsive character is maintained in solid composites obtained by drop casting, thus indicating potential applications in sensing.

Aggregation and Self-Assembly of Amphiphilic Block Copolymers in Aqueous Dispersions of Carbon Nanotubes

Langmuir ◽  
2008 ◽  
Vol 24 (9) ◽  
pp. 4625-4632 ◽  
Author(s):  
Rina Shvartzman-Cohen ◽  
Marc Florent ◽  
Daniella Goldfarb ◽  
Igal Szleifer ◽  
Rachel Yerushalmi-Rozen
Keyword(s):  
Carbon Nanotubes ◽  
Block Copolymers ◽  
Self Assembly ◽  
Amphiphilic Block Copolymers ◽  
Aqueous Dispersions

Amphiphilic Block Copolymers: A Novel Substance for Bitter-Masking in Aqueous Solutions

2020 ◽  
Vol 17 (5) ◽  
pp. 1586-1595
Author(s):  
Pan Li ◽  
Yin Tian ◽  
Xiu-Mei Ke ◽  
Qing-Chu Tan ◽  
Xue Han ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Aqueous Solutions ◽  
Amphiphilic Block Copolymers

scholarly journals Diameter of Carbon Nanotube-Directed Self-Assembly of Amphiphilic Block Copolymers

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1606 ◽  
Author(s):  
Zihao Wang ◽  
Susu Tao ◽  
Yanyan Chu ◽  
Xiaoyan Xu ◽  
Qinggang Tan
Keyword(s):  
Carbon Nanotubes ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Self Assembly ◽  
Supramolecular Structures ◽  
The Self ◽  
Amphiphilic Block Copolymers ◽  
Core Shell ◽  
Nanoparticle Interactions ◽  
Nanocomposite Structures

The cooperative self-assembly of nanoparticles and amphiphilic block copolymers has attracted increasing interests as it offers effective routes to achieve nanocomposite supramolecular structures with desired structure and properties. The incorporation of nanoparticles usually tunes the self-assembly structure of block copolymers, as the copolymer–nanoparticle interactions may change the relative volume ratio of hydrophobic block/hydrophilic block copolymers. It should be noted that the micro-size length and the strong nonpolar feature of carbon nanotubes (CNTs) may cause the block copolymer–CNT interactions to differ from the the block copolymer–nanoparticle interactions. Herein, we show that the diameter of CNTs and the copolymer/CNT ratio have a profound effect on the self-assembly behavior of amphiphilic block copolymers. Upon the addition of carboxylated multi-walled carbon nanotubes (c-MWCNTs, diameter <8 nm,) to the methoxy polyethylene glycol-poly (D,L-lactic acid) (MPEG-PDLLA) solution, it is difficult to observe the c-MWCNTs directly in TEM images. However, it has been found that they form supramolecular nanocomposite structures with MPEG-PDLLA. Moreover, these supramolecular structures transform from core–shell spherical micelles into rod-like micelles and then into large composite aggregates with the increase of the c-MWCNT addition. However, in the case of the addition of c-MWCNTs with a diameter of 30–50 nm, the dispersed c-MWCNTs and spherical core–shell micelles could be observed simultaneously in the TEM images at a low c-MWCNT addition, and then the micelle structure disappeared and only well-dispersed c-MWNTs were observed in TEM images at a high c-MWCNT addition. A possible model was proposed to explain the rule of CNTs participating in the formation of copolymer/CNT nanocomposite structures. It was also shown that as-prepared copolymer/CNT supramolecular nanocomposites could be used as drug carriers, enabling the adjustment of the drug loading and release time.

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