Radiation curing of collagen/divinyl ether enhanced by pyridinium salts

Abstract

ABSTRACT:The radiation curings of collagen/divinyl ether enhanced by several nitrogenous onium salts having relatively stable nonnucleophilic anion (PF 6 Ϫ ) have been investigated. Results of glass transformation temperature (T g ) measurements and IR spectroscopy analysis and solvent extractions to the crosslinked polymer networks demonstrate that the curing reactions have been initiated by electron beam irradiation in the mixture system of collagen/ divinyl ether and onium salts under different atmosphere conditions. The experimental data show the presence of an approximating linear relationship between double bond conversion and gel fraction after the calculation of conversion from IR spectra in oligomer and the measure of gel content at different total radiation doses. Practical values approximate theoretical values in applying gelation theory of the relationship of gel fraction and double bond conversion. In comparison with the influence of different inhibitors, the curing reaction with pyridinium salts is a polymerization and crosslinking of cationic mechanism, but radicals play an important role in initiation.

Vocal Fold Augmentation with Beta Glucan Hydrogel Cross-Linked byγIrradiation for Enhanced Duration of Effect:In VivoAnimal Study

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Extraction of Collagen from Cattle Skin and Synthesis of Collagen Based Flame Retardant Composition and Introduction into Cellulosic Textile Material by Graft Copolymerization

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“…The method for degreasing and drying animal skins and the intensification of the process of obtaining collagen by mechano-chemical treatment was proposed in several research works [6][7][8]. Isolation and study of the properties of collagen shows high reactive ability in oxidation reactions, hydrolysis, curing, tanning and other processes [9][10][11][12][13]. When exposed to temperatures in the drying and thermo-fixing processes resulting from the interaction of macromolecules of cellulose and collagen with potassium persulfate are formed the active centers i.e.…”

Structural study and preliminary biological evaluation on the collagen hydrogel crosslinked by γ‐irradiation

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“…Therefore, crosslinking formed on the surface instead of the bulk of collagen and the extent of crosslinking is limited 3, 18. High‐energy EB is an effective energy source for radiation curing,15 however, the penetration is not sufficient for thick samples. On the contrary, γ‐ray can penetrate into materials to crosslink collagen homogeneously.…”