Dissolution and mutual diffusion of poly(N-vinyl pyrrolidone) in short-chain poly(ethylene glycol) as observed by optical wedge microinterferometry

2002 ◽  
Vol 85 (5) ◽  
pp. 1128-1136 ◽  
Author(s):  
D. F. Bairamov ◽  
A. E. Chalykh ◽  
M. M. Feldstein ◽  
R. A. Siegel ◽  
N. A. Platé
Keyword(s):  
Ethylene Glycol ◽  
Mutual Diffusion ◽  
Short Chain ◽  
Vinyl Pyrrolidone ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Optical Wedge

Self-diffusion in poly( N? -vinyl pyrrolidone) - poly(ethylene glycol) systems

2001 ◽  
Vol 279 (6) ◽  
pp. 532-538 ◽  
Author(s):  
R. S. Vartapetian ◽  
E. V. Khozina ◽  
J. K�rger ◽  
D. Geschke ◽  
F. Rittig ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Vinyl Pyrrolidone ◽  
Poly Ethylene Glycol ◽  
Self Diffusion ◽  
Poly Ethylene

Multicomponent Diffusion in Crowded Solutions. 1. Mutual Diffusion in the Ternary System Poly(ethylene glycol) 400−NaCl−Water

2001 ◽  
Vol 34 (4) ◽  
pp. 991-1000 ◽  
Author(s):  
Alessandro Vergara ◽  
Luigi Paduano ◽  
Vincenzo Vitagliano ◽  
Roberto Sartorio
Keyword(s):  
Ternary System ◽  
Ethylene Glycol ◽  
Multicomponent Diffusion ◽  
Mutual Diffusion ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Solvent-like ligand-coated ultrasmall cadmium selenide nanocrystals: strong electronic coupling in a self-organized assembly

Nanoscale ◽  
2015 ◽  
Vol 7 (27) ◽  
pp. 11667-11677 ◽  
Author(s):  
Katie N. Lawrence ◽  
Merrell A. Johnson ◽  
Sukanta Dolai ◽  
Amar Kumbhar ◽  
Rajesh Sardar
Keyword(s):  
Ethylene Glycol ◽  
Cadmium Selenide ◽  
Semiconductor Nanocrystals ◽  
Solid Surfaces ◽  
Short Chain ◽  
Electronic Coupling ◽  
Poly Ethylene Glycol ◽  
Self Organized ◽  
Colloidal State ◽  
Poly Ethylene

Strong inter-nanocrystal electronic coupling is demonstrated between short chain poly(ethylene glycol) thiolate-coated ultrasmall (<2.5 nm in diameter) CdSe semiconductor nanocrystals both in the colloidal state and as dry films on solid surfaces.

scholarly journals One Step E-Beam Radiation Cross-Linking of Quaternary Hydrogels Dressings Based on Chitosan-Poly(Vinyl-Pyrrolidone)-Poly(ethylene Glycol)-Poly(Acrylic Acid)

2020 ◽  
Author(s):  
Ion Călina ◽  
Maria Demeter ◽  
Anca Scărișoreanu ◽  
Veronica Sătulu ◽  
Bogdana Mitu
Keyword(s):  
Acrylic Acid ◽  
Ethylene Glycol ◽  
Transmission Rate ◽  
Vinyl Pyrrolidone ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Beam Radiation ◽  
Swelling Properties ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

We report on the successful preparation of wet dressings hydrogels based on Chitosan-Poly(N-Vinyl-Pyrrolidone)-Poly(ethylene glycol)-Poly(acrylic acid) and Poly(ethylene oxide) by e-beam cross-linking in weakly acidic media, to be used for rapid healing and pain release of infected skin wounds. The structure and compositions of hydrogels investigated according to sol-gel and swelling studies, network parameters, as well as FTIR and XPS analyses showed the efficient interaction of the hydrogel components upon irradiation, maintaining the bonding environment while the cross-linking degree increasing with the irradiation dose and the formation of a structure with the mesh size in the range 11-67 nm. Hydrogels with gel fraction above 85% and the best-swelling properties in different pH solutions were obtained for hydrogels produced with 15 kGy. The hydrogels are stable in the simulated physiological condition of an infected wound and show appropriate moisture retention capability and the water vapor transmission rate up to 272.67 g m-2 day-1, to ensure fast healing. The hydrogels proved to have a significant loading capacity of ibuprofen (IBU), being able to incorporate a therapeutic dose for the treatment of severe pains. Simultaneously, IBU was released up to 25% in the first 2h, having a release maximum after 8h.

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