نتایج جستجو برای: poly ethylene oxide

تعداد نتایج: 271849  

Journal: :Biomaterials 2010
Gaurav Sahay Vivek Gautam Robert Luxenhofer Alexander V Kabanov

Amphiphilic triblock copolymer, poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide), Pluronic P85, is unexpectedly shown to utilize sophisticated cellular trafficking mechanisms and enter brain microvessel endothelial cells and primary neurons that are poorly penetrable. Though caveolae serve as a primary entry site for the copolymer single chains, in cells devoid of caveolae, t...

Journal: :Energy & environmental materials 2022

Developing laminar composite solid electrolyte with ultrathin thickness and continuous conduction channels in vertical direction holds great promise for all-solid-state lithium batteries. Herein, a thin, is synthesized by filtrating –NH2 functionalized metal-organic framework nanosheets then being threaded poly(ethylene oxide) chains induced the hydrogen-bonding interaction from groups. It demo...

2013
Dan Wang Huiming Lin Jingjie Jiang Xiao Han Wei Guo Xiaodan Wu Yingxue Jin Fengyu Qu

Magnetic and macro/mesoporous bioactive glasses were synthesized by a one-pot method via a handy salt leaching technique. It was identified to be an effective and simple synthetic strategy. The non-ionic triblock copolymer, poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123), was used as the structure directing agent for mesoporous structure but also as the red...

2012
Konstantin Ulrich Petrik Galvosas Jörg Kärger Farida Grinberg

Molecular diffusion of triblock copolymers poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) in water was studied with the help of Pulsed Field Gradient NMR in the broad range of polymer weight fractions from 0.09 to 0.8. Owing to amphiphilic nature of the molecules, these block copolymers exhibit rich self-organization properties when mixed with water. In particular, at ambient t...

Journal: :Physical chemistry chemical physics : PCCP 2015
G K S Prameela B V N Phani Kumar A Pan V K Aswal J Subramanian A B Mandal S P Moulik

The influence of the water soluble non-ionic tri-block copolymer PEO-PPO-PEO [poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide)] i.e., E2P16E2 (L31) on the microstructure and self-aggregation dynamics of the anionic surfactant sodium dodecylsulfate (SDS) in aqueous solution was investigated using cloud point (CP), isothermal titration calorimetry (ITC), high resolution nuclear mag...

Journal: :ChemSusChem 2015
Michael Bernicke Erik Ortel Tobias Reier Arno Bergmann Jorge Ferreira de Araujo Peter Strasser Ralph Kraehnert

Iridium oxide is the catalytic material with the highest stability in the oxygen evolution reaction (OER) performed under acidic conditions. However, its high cost and limited availability demand that IrO2 is utilized as efficiently as possible. We report the synthesis and OER performance of highly active mesoporous IrO2 catalysts with optimized surface area, intrinsic activity, and pore access...

Journal: :Soft matter 2014
Jamie Hurcom Alison Paul Richard K Heenan Alun Davies Nicholas Woodman Ralf Schweins Peter C Griffiths

Small-angle neutron scattering was used to probe the interfacial structure of nitrogen-in-water foams created using a series of tri-block polymeric surfactants of the poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (EOx-POy-EOx) range, from which the nature of the polymeric interface could be characterised. The data follow a pronounced Q(-4) decay, along with a number of inflexi...

Journal: :Biomacromolecules 2002
Kui Huang Bruce P Lee Dale R Ingram Phillip B Messersmith

3,4-Dihydroxyphenyl-L-alanine (DOPA) is an unusual amino acid found in mussel adhesive proteins (MAPs) that is believed to lend adhesive characteristics to these proteins. In this paper, we describe a route for the conjugation of DOPA moieties to poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers. Hydroxyl end groups of PEO-PPO-PEO block copolymers we...

2009
Christine T. Schwall Ipsita A. Banerjee

The pursuit for targeted drug delivery systems has led to the development of highly improved biomaterials with enhanced biocompatibility and biodegradability properties. Microand nanoscale components of hydrogels prepared from both natural and artificial components have been gaining significant importance due to their potential uses in cell based therapies, tissue engineering, liquid micro-lens...

2010
Wei Zhou Kesong Liu Honggang Fu A. Mikó A. L. Demirel M. Somer

Zirconium oxide (ZrO2) has generated wide interest because of its potential in applications such as solid oxide fuel cells, catalysts and optical devices. In these applications, it is important to control the grain size of the material and increase the surface area by introducing porosity with tailored pore size. This paper presents a synthesis route for the preparation of mesoporous zirconia u...

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