FT-IR study of gamma-radiation induced degradation of polyvinyl alcohol (PVA) and PVA/humic acids blends

Ilčin, Michal; Holá, O.; Bakajová, Barbora; Kučerík, Jiří

doi:10.1007/s10967-009-0321-2

Cited by 50 publications

(14 citation statements)

References 30 publications

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“…The presence of certain amount of carbonyl groups arises from the production process of PVA, which is obtained from poly (vinyl acetate) by hydrolysis . Thus, there is always a small content of residual acetate groups . See Table for peak positions and assignments.…”

Section: Resultsmentioning

confidence: 99%

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Monitoring production process of cisplatin‐loaded PLGA nanoparticles by FT‐IR microspectroscopy and univariate data analysis

Portaccio

Menale

Diano

et al. 2014

J of Applied Polymer Sci

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Cisplatin-loaded PLGA nanoparticles for drug delivery have been prepared using a well-established water/oil/water double emulsion-solvent evaporation method. The production process has been monitored by using Fourier Transform Infrared (FT-IR) microspectroscopy without using KBr tablets and any preliminary sample preparation. Significant spectra have been obtained for all chemical compounds and for samples at different steps of production process. The use of a linear or univariate approach using a R 2 determination coefficient has been proposed for discriminating among FT-IR spectra even when small differences are present. The obtained results confirm that new geometries of data acquisition contribute to make infrared microspectroscopy a very useful tool for a rapid and detailed monitoring of production processes of pharmacological interest. Moreover, morphological and physiological characterizations have been performed on cisplatin-loded samples showing results in good agreement with those reported in literature.

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Section: Resultsmentioning

confidence: 99%

“… Main peaks in the FT‐IR spectrum of PVA samples and tentative assignment according to Refs. . In particular, peaks with asterisk are due to the production process, PVA chains can contain acetate groups which did not undergo hydrolysis in the production process of polyvinyl alcohol from polyvinyl acetate according to Refs.…”

Section: Resultsmentioning

confidence: 99%

Monitoring production process of cisplatin‐loaded PLGA nanoparticles by FT‐IR microspectroscopy and univariate data analysis

Portaccio

Menale

Diano

et al. 2014

J of Applied Polymer Sci

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“…6a), the typical peaks of this spectrum were assigned to the stretching vibrations of groups: OH at 3450 cm -1 ; CH/CH 2 at 2954 cm -1 ; C-O at 1108 cm -1 ; and the bending vibration of water absorbed by PVA at 1638 cm -1 , in which OH group has largest absorptance (Venyaminov et al 1997;Ilcin et al 2010;Wong et al 2009). For ZnS:Mn/PVA nanoparticles, on basic, its FT-IR spectrum also shows characteristic peaks of PVA.…”

Section: Analyses Of Tga Dtg and Ft-ir Spectramentioning

confidence: 97%

The photoluminescence enhancement of Mn2+ ions and the crystal field in ZnS:Mn nanoparticles covered by polyvinyl alcohol

et al. 2016

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The polyvinyl alcohol (PVA)-capped ZnS:Mn nanoparticles with Mn content of 8 mol% and different PVA mass (denoted as ZnS:Mn/PVA) are synthesized by co-precipitation method, in which PVA solution is mixed from the beginning with the initial solutions used to synthesize ZnS:Mn nanoparticles. The microstructures, morphology and average crystalline size of ZnS:Mn/PVA nanoparticles were investigated by X-ray diffraction patterns, high resolution transmission electron microscopy, thermal gravimetric analysis (TGA) and differential thermal gravimetric analysis and Fourier transform infrared absorption spectra. The role of PVA to the photoluminescence (PL) of Mn 2? ions in these nanoparticles at 300 K were studied by the PL and photoluminescence excitation (PLE) spectra. The investigated results show that the PVA covering for ZnS:Mn nanoparticles almost is not change the microstructure, morphology, the crystal field and the peak positions in their PL and PLE spectra, but the maximum intensity of peaks increased with PVA mass from 0.2 to 1.0 g. The clear peak positions in PLE spectra show that the energy levels of Mn 2? ions were splitted into multiple levels in the ZnS:Mn crystal field, that its strength D q was caculated. Furthermore, the effect of PVA on the PL enhancement of Mn 2? ions in ZnS:Mn/PVA nanoparticles also was explained.

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“…Thermal analysis techniques are frequently used to determine the thermal behavior of various organic and inorganic compounds [55][56][57][58][59][60][61], and especially of functional polymers [62][63][64][65][66]. Although it represents a very important class of techniques used in studying polymers, few papers have been published in the literature about thermal analysis of such thin films [55][56][57], the main reason being low sensitivity due to the thin film/substrate mass ratio, but also due to the rarity of highly exothermic or endothermic effects that can be considered and used as references [57].…”

Section: Thermal Analysis Of the Bulk Polymersmentioning

confidence: 99%

Thermal behavior and matrix-assisted pulsed laser evaporation deposition of functional polymeric materials thin films with potential use in optoelectronics

Constantinescu

Rotaru

Nedelcea

et al. 2015

Materials Science in Semiconductor Processing

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FT-IR study of gamma-radiation induced degradation of polyvinyl alcohol (PVA) and PVA/humic acids blends

Cited by 50 publications

References 30 publications

Monitoring production process of cisplatin‐loaded PLGA nanoparticles by FT‐IR microspectroscopy and univariate data analysis

Monitoring production process of cisplatin‐loaded PLGA nanoparticles by FT‐IR microspectroscopy and univariate data analysis

The photoluminescence enhancement of Mn2+ ions and the crystal field in ZnS:Mn nanoparticles covered by polyvinyl alcohol

Thermal behavior and matrix-assisted pulsed laser evaporation deposition of functional polymeric materials thin films with potential use in optoelectronics

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