NDLI: In vitro studies of PEG thin films with different molecular weights deposited by MAPLE

Content Provider	Springer Nature Link
Author	Paun, Irina Alexandra Ion, Valentin Luculescu, Catalin Romeo Dinescu, Maria Canulescu, Stela Schou, Jørgen
Copyright Year	2012
Abstract	In this work, polyethylene glycol (PEG) films were produced by Matrix Assisted Pulsed Laser Evaporation (MAPLE). The possibility to tailor the properties of the films by means of polymer molecular weight was explored. The films of PEG of average molecular weights 400 Da, 1450 Da, and 10000 Da (PEG400, PEG1450, and PEG10000) were investigated in vitro, in media similar with those inside the body (phosphate buffer saline PBS with pH 7.4 and blood). The mass of the polymer did not change during this treatment, but the polymer molecular weight was found to strongly influence the films properties and their behavior in vitro. Thus, immersion in PBS induced swelling of the PEG films, which was more pronounced for PEG polymers of higher molecular weight. Prior to immersion in PBS, the PEG films of higher molecular weight were more hydrophilic, the water contact angles decreasing from ∼66 grd for PEG400 to ∼41 grd for PEG1450 and to ∼15 grd for PEG10000. The same trend was observed during immersion of the PEG films in PBS. Before immersion in PBS, the refractive index of the films increased from ∼1.43 for PEG400 to ∼1.48 for PEG1450 and to ∼1.68 for PEG10000. During immersion in PBS the refractive index decreased gradually, but remained higher for the PEG molecules of higher mass. Finally, blood compatibility tests showed that the PEG films of higher molecular weight were most compatible with blood.
Starting Page	223
Ending Page	232
Page Count	10
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	109
Issue Number	1
e-ISSN	14320630
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condensed Matter Physics Optical and Electronic Materials Surfaces and Interfaces, Thin Films Nanotechnology Operating Procedures, Materials Treatment Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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