A Record Nine Different Phases (Four Cubic, Two Hexagonal, and One Lamellar Lyotropic Liquid Crystalline and Two Micellar Solutions) in a Ternary Isothermal System of an Amphiphilic Block Copolymer and Selective Solvents (Water and Oil)

Langmuir ◽  
1998 ◽  
Vol 14 (10) ◽  
pp. 2627-2638 ◽  
Author(s):  
Paschalis Alexandridis ◽  
Ulf Olsson ◽  
Björn Lindman
Keyword(s):  
Block Copolymer ◽  
Liquid Crystalline ◽  
Amphiphilic Block Copolymer ◽  
Micellar Solutions ◽  
Selective Solvents ◽  
Isothermal System

scholarly journals Stimuli-Responsive Lyotropic Liquid Crystalline Nanosystems with Incorporated Poly(2-Dimethylamino Ethyl Methacrylate)-b-Poly(Lauryl Methacrylate) Amphiphilic Block Copolymer

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1400 ◽  
Author(s):  
Maria Chountoulesi ◽  
Natassa Pippa ◽  
Varvara Chrysostomou ◽  
Stergios Pispas ◽  
Evangelia D. Chrysina ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Liquid Crystalline ◽  
Polymer Concentration ◽  
Morphological Characteristics ◽  
Amphiphilic Block Copolymer ◽  
Poloxamer 407 ◽  
Stimuli Responsive ◽  
Ph Responsive ◽  
Ethyl Methacrylate ◽  
Liquid Crystalline Nanoparticles

There is an emerging need to evolve the conventional lyotropic liquid crystalline nanoparticles to advanced stimuli-responsive, therapeutic nanosystems with upgraded functionality. Towards this effort, typically used stabilizers, such as Pluronics®, can be combined or replaced by smart, stimuli-responsive block copolymers. The aim of this study is to incorporate the stimuli-responsive amphiphilic block copolymer poly(2-(dimethylamino)ethyl methacrylate)-b-poly(lauryl methacrylate) (PDMAEMA-b-PLMA) as a stabilizer in lipidic liquid crystalline nanoparticles, in order to provide steric stabilization and simultaneous stimuli-responsiveness. The physicochemical and morphological characteristics of the prepared nanosystems were investigated by light scattering techniques, cryogenic-transmission electron microscopy (cryo-TEM), X-ray diffraction (XRD) and fluorescence spectroscopy. The PDMAEMA-b-PLMA, either individually or combined with Poloxamer 407, exhibited different modes of stabilization depending on the lipid used. Due to the protonation ability of PDMAEMA blocks in acidic pH, the nanoparticles exhibited high positive charge, as well as pH-responsive charge conversion, which can be exploited towards pharmaceutical applications. The ionic strength, temperature and serum proteins influenced the physicochemical behavior of the nanoparticles, while the polymer concentration differentiated their morphology; their micropolarity and microfluidity were also evaluated. The proposed liquid crystalline nanosystems can be considered as novel and attractive pH-responsive drug and gene delivery nanocarriers due to their polycationic content.

Controllable Morphology Formation of Gold Nano- and Micro-plates in Amphiphilic Block Copolymer-based Liquid Crystalline Phase

2004 ◽  
Vol 33 (6) ◽  
pp. 720-721 ◽  
Author(s):  
Luyan Wang ◽  
Xiao Chen ◽  
Jie Zhan ◽  
Zhenming Sui ◽  
Jikuan Zhao ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Liquid Crystalline Phase ◽  
Amphiphilic Block Copolymer ◽  
Micro Plates

scholarly journals Self-Assembly of Molecular Brushes with Polyimide Backbone and Amphiphilic Block Copolymer Side Chains in Selective Solvents

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2922
Author(s):  
Maria Simonova ◽  
Ivan Ivanov ◽  
Tamara Meleshko ◽  
Alexey Kopyshev ◽  
Svetlana Santer ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Methyl Methacrylate ◽  
Self Assembly ◽  
Amphiphilic Block Copolymer ◽  
Side Chains ◽  
Poly Methyl Methacrylate ◽  
Molecular Brushes ◽  
Selective Solvents ◽  
Significant Difference ◽  
Thermodynamic Quality

Three-component molecular brushes with a polyimide backbone and amphiphilic block copolymer side chains with different contents of the “inner” hydrophilic (poly(methacrylic acid)) and “outer” hydrophobic (poly(methyl methacrylate)) blocks were synthesized and characterized by molecular hydrodynamics and optics methods in solutions of chloroform, dimethylformamide, tetrahydrofuran and ethanol. The peculiarity of the studied polymers is the amphiphilic structure of the grafted chains. The molar masses of the molecular brushes were determined by static and dynamic light scattering in chloroform in which polymers form molecularly disperse solutions. Spontaneous self-assembly of macromolecules was detected in dimethylformamide, tetrahydrofuran and ethanol. The aggregates size depended on the thermodynamic quality of the solvent as well as on the macromolecular architectural parameters. In dimethylformamide and tetrahydrofuran, the distribution of hydrodynamic radii of aggregates was bimodal, while in ethanol, it was unimodal. Moreover, in ethanol, an increase in the poly(methyl methacrylate) content caused a decrease in the hydrodynamic radius of aggregates. A significant difference in the nature of the blocks included in the brushes determines the selectivity of the used solvents, since their thermodynamic quality with respect to the blocks is different. The macromolecules of the studied graft copolymers tend to self-organization in selective solvents with formation of a core–shell structure with an insoluble solvophobic core surrounded by the solvophilic shell of side chains.

Synthesis and Characterization of a Temperature-responsive Amphiphilic Block Copolymer Containing a Liquid Crystalline Unit

2008 ◽  
Vol 37 (12) ◽  
pp. 1214-1215 ◽  
Author(s):  
Masamichi Nishihara ◽  
Yoshihiko Murakami ◽  
Takashi Shinoda ◽  
Jun Yamamoto ◽  
Masayuki Yokoyama
Keyword(s):  
Block Copolymer ◽  
Liquid Crystalline ◽  
Amphiphilic Block Copolymer ◽  
Synthesis And Characterization ◽  
Temperature Responsive

The Self-Assembly of an Amphiphilic Block Copolymer: A Dissipative Particle Dynamics Study

2005 ◽  
Vol 42 (3) ◽  
pp. 180-183 ◽  
Author(s):  
S. G. Schulz ◽  
U. Frieske ◽  
H. Kuhn ◽  
G. Schmid ◽  
F. Müller ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
The Self ◽  
Amphiphilic Block Copolymer

β-lactam Functionalized Poly(isoprene-b-ethylene oxide) Amphiphilic Block Copolymer Micelles as a New Nanocarrier System for Curcumin

2010 ◽  
Vol 6 (3) ◽  
pp. 277-284 ◽  
Author(s):  
Konstantinos Gardikis ◽  
Konstantinos Dimas ◽  
Aristidis Georgopoulos ◽  
Eleni Kaditi ◽  
Stergios Pispas ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Amphiphilic Block Copolymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

Synthesis of azobenzene-containing liquid crystalline block copolymer nanoparticles via polymerization induced hierarchical self-assembly

2021 ◽  
Author(s):  
Wei Wen ◽  
Wangqi Ouyang ◽  
Song Guan ◽  
Aihua Chen
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
Facile Synthesis ◽  
Liquid Crystalline Nanoparticles

A facile synthesis of non-spherical photoresponsive azobenzene-containing liquid crystalline nanoparticles via polymerization-induced hierarchical self-assembly (PIHSA).

Regioregular Poly(3-hexylthiophene) in a Novel Conducting Amphiphilic Block Copolymer

2009 ◽  
Vol 30 (1) ◽  
pp. 11-16 ◽  
Author(s):  
C. Rockford Craley ◽  
Rui Zhang ◽  
Tomasz Kowalewski ◽  
Richard D. McCullough ◽  
Mihaela C. Stefan
Keyword(s):  
Block Copolymer ◽  
Amphiphilic Block Copolymer ◽  
Regioregular Poly

Amphiphilic block copolymer-based photonic platform towards efficient protein detection

2016 ◽  
Author(s):  
Afroditi Petropoulou ◽  
Thomas J. Gibson ◽  
Efrosyni Themistou ◽  
Stergios Pispas ◽  
Christos Riziotis
Keyword(s):  
Block Copolymer ◽  
Protein Detection ◽  
Amphiphilic Block Copolymer
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