scholarly journals Solute diffusion and interactions in cross-linked poly(ethylene glycol) hydrogels studied by Fluorescence Correlation Spectroscopy

Soft Matter ◽  
2010 ◽  
Vol 6 (15) ◽  
pp. 3609 ◽  
Author(s):  
Silviya P. Zustiak ◽  
Hacene Boukari ◽  
Jennie B. Leach
Keyword(s):  
Ethylene Glycol ◽  
Fluorescence Correlation Spectroscopy ◽  
Correlation Spectroscopy ◽  
Solute Diffusion ◽  
Poly Ethylene Glycol ◽  
Fluorescence Correlation ◽  
Poly Ethylene

scholarly journals Studies on Chemical IR Images of Poly(hydroxybutyrate–co–hydroxyhexanoate)/Poly(ethylene glycol) Blends and Two-Dimensional Correlation Spectroscopy

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 507 ◽  
Author(s):  
Yeonju Park ◽  
Sila Jin ◽  
Yujeong Park ◽  
Soo Kim ◽  
Isao Noda ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Thermal Properties ◽  
Ethylene Glycol ◽  
Correlation Spectroscopy ◽  
Two Dimensional ◽  
Poly Ethylene Glycol ◽  
Biodegradable Poly ◽  
Poly Ethylene ◽  
Increasing Temperature ◽  
Kinetics Of

Biodegradable poly-[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoates] (PHBHx) have been widely studied for their applications in potentially replacing petroleum-based thermoplastics. In this study, the effect of the high molecular weight (Mn = 3400) poly(ethylene glycol) (PEG) blended in the films of PHBHx with different ratios of PEG was investigated using chemical FTIR imaging. Chemical IR images and FTIR spectra measured with increasing temperature revealed that PEG plays an important role in changing the kinetics of PHBHx crystallization. In addition, two-dimensional correlation spectra clearly showed that thermal properties of PHBHx/PEG blend film changed when the blending ratio of PHBHx/PEG were 60/40 and 50/50. Consequently, PEG leads to changes in the thermal behavior of PHBHx copolymers.

Light Scattering, Atomic Force Microscopy and Fluorescence Correlation Spectroscopy Studies of Polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) Micelles

2003 ◽  
Vol 68 (11) ◽  
pp. 2120-2138 ◽  
Author(s):  
Miroslav Štěpánek ◽  
Jana Humpolíčková ◽  
Karel Procházka ◽  
Martin Hof ◽  
Zdeněk Tuzar ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Light Scattering ◽  
Fluorescence Correlation Spectroscopy ◽  
Polymeric Nanoparticles ◽  
Correlation Spectroscopy ◽  
Force Microscopy ◽  
Fluorescence Correlation ◽  
Atomic Force ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Polymeric nanoparticles formed by triblock copolymer polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide), PS-PVP-PEO, in aqueous media were studied by a combination of fluorescence correlation spectroscopy with other fluorescence techniques, light scattering and atomic force microscopy. The studied polymeric nanoparticles exist in the form of (i) core/shell micelles in acid solution at pH lower than 4.8 and (ii) three-layer onion micelles at higher pH. Since water is a very strong precipitant for PS, both types of micelles have kinetically frozen spherical PS cores. The cores of micelles in acid media are surrounded by soluble shells formed by partly protonated PVP and PEO, while the cores of micelles in alkaline media are surrounded by compact insoluble layers of deprotonated PVP and soluble PEO shells. The micellization behavior of PS-PVP-PEO micelles is accompanied by secondary aggregation of micelles, which is provoked by stirring, shaking and also by filtration of micellar solutions. Therefore fluorescence correlation spectroscopy (FCS), which, in contrast to light scattering techniques, does not require filtration, was used as the main experimental technique for the characterization of non-aggregated micelles. The binding of a fluorescence probe, octadecylrhodamine B (ORB), to polymeric micelles, was studied before the FCS study of micelles.

CHARACTERIZATION OF POLY(ACRYLIC ACID) DIFFUSION DYNAMICS ON THE GRAFTED SURFACE OF POLY(ETHYLENE TEREPHTHALATE) FILMS BY FLUORESCENCE CORRELATION SPECTROSCOPY

2006 ◽  
Vol 01 (04) ◽  
pp. 433-441 ◽  
Author(s):  
XIAOTAO PAN ◽  
CAILI AW ◽  
YANAN DU ◽  
HANRY YU ◽  
THORSTEN WOHLAND
Keyword(s):  
Ionic Strength ◽  
Acrylic Acid ◽  
Chain Length ◽  
Fluorescence Correlation Spectroscopy ◽  
Ethylene Terephthalate ◽  
Correlation Spectroscopy ◽  
Fluorescence Correlation ◽  
Poly Ethylene Terephthalate ◽  
Diffusion Dynamics ◽  
Poly Ethylene

Poly(acrylic acid) (PAAc) is a commonly used polymer grafted on poly(ethylene terephthalate) films for the immobilization of bioactive molecules that directly interact with living cells or tissues for the maintenance of their viability and functionality. The diffusion property of the grafted PAAc on the surface is a critical parameter related to the density, length of polymer chains, and ionic strength of the solution. Fluorescence correlation spectroscopy (FCS) is able to measure the diffusion coefficient of fluorescent particles in solution with single molecule sensitivity and specificity. It was used as an effective tool to detect diffusion dynamics of Atto 565 molecules, a good indicator for viscosity of PAAc, in both aqueous polymer solutions and polymer grafted film surfaces immersed in solution. In this work we determine the polymer chain length under different polymerization conditions in solution and deduce the solution viscosity by FCS measurements of Atto 565 as tracer molecule. By using the same tracer on the grafted polymer films we can infer the viscosity of these grafted layers under a variety of conditions, including the PAAc chain length, the UV exposure time during polymerization, the ionic strength, and the pH value of the immersed solution.

PIEZOELECTRIC PROPERTIES OF POLY(3-HYDROXYBUTYRATE-CO-3-HEDROXYBUTYRATE)-CO-POLY(ETHYLENE GLYCOL) PRODUCED BY CONTROLLED MICROBIOLOGICAL BIOSYNTHESIS

2019 ◽  
Vol 10 (10) ◽  
Author(s):  
Anton Bonartsev ◽  
Vera Voinova ◽  
Elizaveta Akoulina ◽  
Andrey Dudun ◽  
Irina Zharkova ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Piezoelectric Properties ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Thermosensitives hydrogels based on poly (ethylene glycol): I. Synthesis, characterization and release

2007 ◽  
Vol 32 (5) ◽  
pp. 431-446 ◽  
Author(s):  
Tahar Bartil ◽  
Mahmoud Bounekhel ◽  
Cedric Calberg ◽  
Robert Jerome
Keyword(s):  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene
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