Structural Transformation of Diblock Copolymer/Homopolymer Assembles by Tuning Cylindrical Confinement and Interfacial Interactions.

08:00 EDT 22nd October 2015 | BioPortfolio

Summary of "Structural Transformation of Diblock Copolymer/Homopolymer Assembles by Tuning Cylindrical Confinement and Interfacial Interactions."

In this study, we report the controllable structural transformation of block copolymer/homopolymer binary blends in cylindrical nanopores. Polystyrene-b-poly(4-vinyl pyridine)/homopolystyrene (SVP/hPS) nanorods (NRs) can be fabricated by pouring the polymers into anodic aluminum oxide (AAO) channel, and isolated by selective removal of the AAO membrane. In this two dimensional (2D) confinement, SVP self-assemble into NRs with concentric lamellar structure, and the internal structure can be tailored with the addition of hPS. We show that weight fraction and molecular weight of hPS, and the diameter of the channels can significantly affect the internal structure of the NRs. Moreover, mesoporous materials with tunable pore shape, size, and packing style can be prepared by selective solvent swelling of the structured NRs. In addition, these NRs can transform into spherical structures through solvent-absorption annealing, triggering the conversion from 2D to 3D confinement. More importantly, the transformation dynamics can be tuned by varying the preference property of surfactant to the polymers. It is proved that the shape and internal structure of the polymer particles are dominated by the interfacial interactions governed by the surfactants.


Journal Details

This article was published in the following journal.

Name: Langmuir : the ACS journal of surfaces and colloids
ISSN: 1520-5827


DeepDyve research library

PubMed Articles [7260 Associated PubMed Articles listed on BioPortfolio]

Role of Chain Connectivity across an Interface on the Dynamics of a Nanostructured Block Copolymer.

Fluorescence labeling enables component- and location-specific measurements of the glass transition temperature (T_{g}) in complex polymer systems. Here we characterize the T_{g} of fluorescently labe...

Controlling Structure Beyond the Initial Coordination Sphere: Complexation-Induced Reversed Micelle Formation in Calix4pyrrole-Containing Diblock Copolymers.

A diblock copolymer containing a strapped calix[4]pyrrole-based ion pair recognition subunit has been synthesized via RAFT polymerization. As prepared, the polymer is hydrophobic and devoid of any par...

Network Model of the Disordered Phase in Symmetric Diblock Copolymer Melts.

We present a model for the order-disorder transition of symmetric A-B diblock copolymer melts in which the disordered phase is treated as a bicontinuous network, and in which self-consistent field pre...

Accelerated Aging of PS Blocks in PS- b-PMMA Diblock Copolymer under Hard Confinement.

This letter presents accelerated physical aging of polystyrene (PS) blocks in polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymers under hard confinement. The three-dimensional h...

Preparation of amphiphilic poly(ethylene glycol)-b-poly(γ-butyrolactone) diblock copolymer via ring opening polymerization catalyzed by a cyclic trimeric phosphazene base or alkali alkoxide.

Bio-based poly(γ-butyrolactone) (PγBL) as a fully biodegradable and bioabsorbable biomaterials has shown superior properties compared to other aliphatic polyesters. It is of great importance to prep...

Clinical Trials [810 Associated Clinical Trials listed on BioPortfolio]

Safety Study of Polylactide-Caprolactone-Trimethylenecarbonate Copolymer for Post-Operative Adhesion Prophylaxis

The purpose of this study is to compare adhesion prophylaxis with polylactide-caprolactone-trimethylenecarbonate copolymer to icodextrin 4% in terms of safety, side effects and usability i...

Phase III Randomized, Double-Blind, Placebo-Controlled Study of Copolymer 1 for Relapsing-Remitting Multiple Sclerosis

OBJECTIVES: I. Compare tolerance to and therapeutic impact of copolymer 1, a mixture of synthetic polypeptides, with placebo in patients with relapsing-remitting multiple sclerosis.

Comparison of the Cuff Pressure of TaperGuard and Cylindrical- Endotracheal Tube During Laparoscopic Surgery

The purpose of this study was to compare the cuff pressure between cylindrical and TaperGuard endotracheal tube during laparoscopic cholecystectomy.

To Compare the Incidence of POST Between a TaperGuard ETT and Cylindrical-shaped ETT Under High Cuff Pressure

Postoperative Sore Throat (POST) is supposed to be the most frequently occurred respiratory complication related to endotracheal intubation .Whether the new type of ETT(TaperGuard ETT) to ...

The Influence of GVS on Mental Transformation

Corroboratory behavioral evidence showed interaction effects between vestibular stimulation and egocentric transformation. The investigators here examine in healthy participants, whether ...

Medical and Biotech [MESH] Definitions

Copolymer of divinyl ether and maleic anhydride that acts as an immunostimulant with antineoplastic and anti-infective properties. It is used in combination with other antineoplastic agents.

A peptide which is a homopolymer of lysine.

A technique that uses LASERS to trap, image, and manipulate small objects (biomolecules, supramolecular assembles, DENDRIMERS) in three dimensional space. (From Glossary of Biotechnology and Nanobiotechnology Terms, 4th ed.)

Cylindrical epithelial cells in the innermost layer of the ENAMEL ORGAN. Their functions include contribution to the development of the dentinoenamel junction by the deposition of a layer of the matrix, thus producing the foundation for the prisms (the structural units of the DENTAL ENAMEL), and production of the matrix for the enamel prisms and interprismatic substance. (From Jablonski's Dictionary of Dentistry, 1992)

The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES.

Quick Search


DeepDyve research library

Searches Linking to this Article