Results 241 to 250 of about 109,485 (298)
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Orienting Block Copolymer Microdomains with Block Copolymer Brushes
ACS Nano, 2012A simple, rapid, and robust technique for controlling the self-assembly of block copolymers (BCPs) with a large segmental interaction parameter, χ, is described using a surface modified with anchored BCP brushes. End-functionalized poly(styrene-b-ethylene oxide)s (PS-b-PEOs), where the fraction of PS (f(PS)) was varied, end-functionalized neat PS, and ...
Weiyin, Gu +2 more
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Skin delivery by block copolymer nanoparticles (block copolymer micelles)
International Journal of Pharmaceutics, 2015Block copolymer nanoparticles often referred to as "block copolymer micelles" have been assessed as carriers for skin delivery of hydrophobic drugs. Such carriers are based on organic biocompatible and biodegradable materials loaded with hydrophobic drugs: poly(lactide)-block-poly(ethylene glycol) copolymer (PLA-b-PEG) nanoparticles that have a solid ...
Laredj-Bourezg, Faiza +6 more
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Current Opinion in Solid State and Materials Science, 1999
The efficient synthesis of structurally well-defined block copolymers is exciting and important area of research. This article describes several methods for the preparation of di- and triblock copolymers. Examples are taken from the literature and include anionic, cationic, free-radical and metal-catalyzed polymerizations that are useful for the ...
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The efficient synthesis of structurally well-defined block copolymers is exciting and important area of research. This article describes several methods for the preparation of di- and triblock copolymers. Examples are taken from the literature and include anionic, cationic, free-radical and metal-catalyzed polymerizations that are useful for the ...
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Prismatic Block Copolymer Hexosomes
ACS Nano, 2023Cubosomes and hexosomes are recent solution morphologies with an ordered porous structure and are observed for lipids and amphiphilic block copolymers (BCPs) with high hydrophobic fractions. Whereas lipid hexosomes typically exhibit a prismatic shape, BCP hexosomes have so far only been observed as closed microspheres where inner channels are not ...
André H. Gröschel +4 more
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Nanostructured block copolymer muscles
Nature Nanotechnology, 2022High-performance actuating materials are necessary for advances in robotics, prosthetics and smart clothing. Here we report a class of fibre actuators that combine solution-phase block copolymer self-assembly and strain-programmed crystallization. The actuators consist of highly aligned nanoscale structures with alternating crystalline and amorphous ...
Chao Lang +7 more
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Linear Block Copolymer Synthesis
Chemical Reviews, 2022Block copolymers form the basis of the most ubiquitous materials such as thermoplastic elastomers, bridge interphases in polymer blends, and are fundamental for the development of high-performance materials. The driving force to further advance these materials is the accessibility of block copolymers, which have a wide variety in composition ...
Huong Dau +11 more
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Nonionic Block Copolymer Antifoams
Langmuir, 2006Aqueous dispersions of alkoxylated alcohol block copolymer (BCP) drops are investigated as antifoams. A model aqueous nonionic surfactant solution of Polysorbate 20 and an industrial white water suspension are used as foaming systems. Visual evidence obtained using a two-bubble technique involving a CCD camera coupled with high magnification lenses ...
K. S. JOSHI +5 more
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Bactericidal Block Copolymer Micelles
Macromolecular Bioscience, 2011AbstractBlock copolymer micelles with bactericidal properties were designed to deactivate pathogens such as E. coli bacteria. The micelles of PS‐b‐PAA and PS‐b‐P4VP block copolymers were loaded with biocides TCMTB or TCN up to 20 or 30 wt.‐%, depending on the type of antibacterial agent.
Renata, Vyhnalkova +2 more
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Bioinspired functional block copolymers
Soft Matter, 2007The diversity and complexity of structures and functions in synthetic polymer systems can be increased through conjugation with biological segments or, in other words, through generation of "polymer-bioconjugates" or "macromolecular chimeras". The present contribution highlights major synthetic approaches toward sophisticated functional hybrid block ...
Börner, H., Schlaad, H.
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All-Conjugated Block Copolymers
Accounts of Chemical Research, 2008All-conjugated block copolymers of the rod-rod type came into the focus of interest because of their unique and attractive combination of nanostructure formation and electronic activity. Potential applications in a next generation of organic polymer materials for photovoltaic devices ("bulk heterojunction"-type solar cells) or (bio)sensors have been ...
Ullrich, Scherf +2 more
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