Journal Article10.1021/LA000008M
Small-Angle Neutron Scattering Investigation of the Temperature-Dependent Aggregation Behavior of the Block Copolymer Pluronic L64 in Aqueous Solution†
Lin Yang and,Paschalis Alexandridis,David C. Steytler,Matthias J. Kositza and,Josef F. Holzwarth +4 more
192
TL;DR: In this article, small-angle neutron scattering (SANS) was used to investigate the temperature dependence of the structure of micelles formed by poly(ethylene oxide)−poly(propylene oxide) −poly(ethylenes oxide) Pluronic L64 amphiphilic block copolymer in aqueous solution.
read more
Abstract: Small-angle neutron scattering (SANS) was used to investigate the temperature dependence of the structure of micelles formed by the poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide) Pluronic L64 amphiphilic block copolymer in aqueous (D2O) solution. Different models for the form factor and the structure factor have been considered for fitting the SANS scattering patterns. By comparing the various models, we found that in the intermediate block copolymer concentration range, e.g., 2.5 wt % Pluronic L64, the micelles are well separated while the intermicellar interaction remains strong. Thus the more appropriate model was that of core−corona form factor and hard sphere structure factor, which allowed the determination of the core, micelle, and hard sphere interaction radii, the micelle association number, and the solvent volume fraction in the micelle core and corona. Upon an increase of temperature (in the range 35−55 °C) the micelle radius increased by ≈10%, accompanied by the loss of water ...
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Sulfonated hydrocarbon membranes for medium-temperature and low-humidity proton exchange membrane fuel cells (PEMFCs)
TL;DR: In this paper, a review summarizes efforts in developing sulfonated hydrocarbon proton exchange membranes (PEMs) with excellent long-term electrochemical fuel cell performance in medium-temperature and/or low-humidity PEMFC applications.
655
Formulation of Poloxamers for Drug Delivery.
TL;DR: The self-assembly properties of poloxamers can be leveraged to encapsulate drugs using an array of processing techniques including direct solubilization, solvent displacement methods, emulsification and preparation of kinetically-frozen nanoparticles.
484
Mechanism of gold metal ion reduction, nanoparticle growth and size control in aqueous amphiphilic block copolymer solutions at ambient conditions
TL;DR: The observations suggest that the formation of gold nanoparticles from AuCl4- comprises three main steps: reduction of metal ions by block copolymer in solution, absorption of blockCopolymer on gold clusters and reduction ofMetal ions on the surface of these gold clusters, and growth of metal particles stabilized by block Copolymers.
314
Single-step synthesis and stabilization of metal nanoparticles in aqueous pluronic block copolymer solutions at ambient temperature
TL;DR: A single-step synthesis of gold nanoparticles with an average diameter of approximately 10 nm from hydrogen tetrachloroaureate(III) hydrate (HAuCl4.3H2O) has been achieved in air-saturated aqueous solutions that contain poly(ethylene oxide)-poly(propylene oxide)-Poly(ethylenes oxide) (PEO-PPO-PEO) block copolymers but not any other reducing agent.
303
Binding of sodium dodecyl sulfate (SDS) to the ABA block copolymer pluronic F127 (EO97PO69EO97): F127 aggregation induced by SDS
TL;DR: In this paper, a third interaction between SDS and F127, which involves promotion of F127 micelles at concentrations up to 3 °C below the critical micellar temperature of pure F127 was identified and investigated.
153
References
Micellization of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymers in aqueous solutions: Thermodynamics of copolymer association
TL;DR: In this article, a closed association model was used to describe the copolymer micellization process for the majority of the Pluronics and used to obtain the standard free energies, enthalpies, and entropies of micellisation.
1.8K
Poly(ethylene oxide)-poly(propylene oxide )-poly (ethylene oxide) block copolymer surfactants in aqueous solutions and at interfaces: thermodynamics, structure, dynamics, and modeling
TL;DR: In this article, the association properties of poly(ethylene oxide)-block-poly(propyleneoxide)-blockpoly(methylene oxide) (PEO) copolymers in aqueous solutions, and the adsorption at interfaces are reviewed.
1.8K
Analysis of small-angle scattering data from colloids and polymer solutions: modeling and least-squares fitting
TL;DR: In this paper, the analysis and modeling of small-angle scattering data from colloidal particles or polymers in solution are discussed and the basic principles of linear and non-linear least-squares methods are summarized with emphasis on applications in the analysis of small angle scattering data, including indirect Fourier transformation, square root deconvolution, size distribution determinations, and modeling.
1.5K
•Book
Polymers and Neutron Scattering
Julia S. Higgins,Henri Benoît +1 more
- 27 Mar 1997
TL;DR: Theoretical basis of scattering labelling with deuterium is discussed in this article, where the authors describe the nuts and bolts sprectrometers and what they measure, how, why, and when to use form factors interacting systems.
1.4K
Self-aggregation and phase behavior of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers in aqueous solution
TL;DR: In this paper, the phase behavior and aggregation properties of block copolymers of poly(ethylene oxide)-poly(propylene oxide), poly(methylene oxide) (Pluronics, poloxamers) in aqueous solution have recently attracted much attention.
441