Radiation induced degradation of xanthan gum in the solid state

Şen, Murat; Hayrabolulu, Hande; Taşkın, Pınar; Torun, Murat; Demeter, Mária; Cutrubinis, Mihalis; Güven, Olgun

doi:10.1016/j.radphyschem.2015.10.005

Cited by 20 publications

(7 citation statements)

References 12 publications

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“…In our previous study, related to the -radiation processing of natural polymers in solution or solid state, was demonstrated that the dose rate, as well as the concentration of polymers are critical parameters which influenced the final results of radiation processing of natural polymers. 54,55 At the same time, the irradiation conditions also influence the results of irradiations. Very low dose rates will enhance the oxidative degradation processes during irradiation.…”

Section: Sol-gel Analysismentioning

confidence: 99%

“…In our previous work, it was demonstrated that when G'' became larger than G', viscous behaviour became dominant due to the significant decrease in molecular weight with dose. 54 In Figure 4(d), (e), and (f) the rheological behaviour of C-PVP hydrogels prepared with different concentrations of CA is presented. The magnitudes of storage and viscous moduli depend on the CA concentration, the hydrogels composition as well as on the applied absorbed dose.…”

Section: G G G G G Gmentioning

confidence: 99%

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E-Beam Processing of Collagen-Poly(N-vinyl-2-pyrrolidone) Double-Network Superabsorbent Hydrogels: Structural and Rheological Investigations

et al. 2019

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Collagen (C)-poly(N-vinyl-2-pyrrolidone) (PVP) double-network superabsorbent hydrogels were synthesized by e-beam (electron beam) radiation processing, both with the addition of water-soluble cross-linking agents (CA), as well as without CA. The aim of the study was to develop a hydrogel for future application as wound dressings via e-beam radiation cross-linking of two biocompatible polymers. The formation of C-PVP hydrogels was confirmed by Fourier transform infrared (FTIR) spectroscopy and their performance was determined from morphological and rheological experiments, such as sol-gel analysis, swelling capacity, storage (G') and viscous (G'') moduli, cross-linking density, and pore size. Sol-gel analysis was performed in order to determine the gel properties as function of absorbed dose and it was found that the degradation density (p 0)/cross-linking density (q 0) ratio indicates a negligible contribution of chain scission processes. The rheological data confirmed that the elastic properties were predominant: G' moduli were larger than G'' moduli, as is specific to elastic solids and indicate the formation of a permanent hydrogel network were cross-links are present. Moreover, the swelling studies indicated that the hydrogels have good stability both in deionized water and phosphate-buffered saline (PBS) solution at 37 o C, and superabsorbent properties. The hydrogels network parameters obtained with lower content of CA, could be controlled by changing the absorbed dose.

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Section: Sol-gel Analysismentioning

confidence: 99%

Section: G G G G G Gmentioning

confidence: 99%

E-Beam Processing of Collagen-Poly(N-vinyl-2-pyrrolidone) Double-Network Superabsorbent Hydrogels: Structural and Rheological Investigations

et al. 2019

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“…where km = 1.7×10 6 dL/g, a = 1.14, respectively [5] Different xanthan samples were admixtured to the foliar fertilizers at 50 and 100 ppm to prepare the spraying solutions, which applied to maize and soybean seedlings. After a predetermined period from spraying, the effects of xanthan on the plant growth were investigated as the changes in the plant height, root length and fresh biomass of the seedlings.…”

Section: Measurementsmentioning

confidence: 99%

“…Depended on radiation dose and dose rate, viscosity and Mw of the irradiated xanthan will reduce to some extent. Study on radiation degradation of xanthan in solid state, M. Şen et al reported that the Mw reduction was more effective by gamma irradiation at low dose rate [5].…”

Section: Introductionmentioning

confidence: 99%

Low Molecular Weight Xanthan Prepared by Gamma Irradiation and Their Effects to Development of Seedlings

Binh¹,

Diep²,

Sang³

et al. 2016

RAD Conference Proceedings

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Low molecular weight (Mw) xanthan was prepared by gamma Co-60 irradiation at both dry and pastelike states. The viscosity average molecular weight (Mv) of the irradiated xanthan gradually decreased with the increase of the radiation dose. Its Mv slowly reduced to 1.8 × 10 3 kDa from 1.1 × 10 4 kDa of non-irradiated xanthan by irradiation at 500 kGy in the solid state, and quickly reduced to 5.3 × 10 2 kDa by irradiation at 50 kGy in the pastelike state. However, the viscosity of the xanthan is still high enough for utilization as a bio-adhesive polymer. Therefore, the low Mw xanthan prepared by gamma irradiation has been studied as the additive to improve the effectiveness of fertilizer. In this study, foliar fertilizers supplemented with xanthan and irradiated xanthan were applied to maize and soybean seedlings. The results suggested that their developments were much increased by the presence of irradiated xanthan compared to initial xanthan, as indicated by the increases of their plant height, root length and fresh biomass.

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“…Comprehensives studies on the γ-radiation of XG in solid and aqueous states were performed by Șen and Hayrabolulu et al They showed that the effect of γ-radiation in air for XG is chain scission, which is effective when the dose rate is decreased due to the enhanced oxidative degradations during irradiation [ 16 , 17 ]. The same research group developed superabsorbent hydrogels based on XG using γ-radiation crosslinking synthesis at very low absorbed dose, such as 1–2 kGy [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Novel Superabsorbent Hybrid Hydrogels by E-Beam Crosslinking

Călina

Demeter

Scărișoreanu

et al. 2021

Gels

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In this study, several superabsorbent hybrid hydrogel compositions prepared from xanthan gum (XG)/sodium carboxymethylcellulose (CMC)/graphene oxide (GO) were synthesized by e-beam radiation crosslinking. We studied and evaluated the effects of GO content from the chemical structure of the hydrogels according to: sol-gel analysis, swelling degree, diffusion of water, ATR-FTIR spectroscopy, network structure, and dynamic mechanical analysis. The gel fraction and swelling properties of the prepared hydrogels depended on the polymer compositions and the absorbed dose. The hybrid XGCMCGO hydrogels showed superabsorbent capacity and reached equilibrium in less than 6 h. In particular, the XGCMCGO (70:30) hydrogel reached the highest swelling degree of about 6000%, at an irradiation dose of 15 kGy. The magnitude of the elastic (G′) and viscous (G″) moduli were strongly dependent on the absorbed dose. When the degree of crosslinking was higher, the G′ parameter was found to exceed 1000 Pa. In the case of the XGCMCGO (80:20) hydrogel compositions, the Mc and ξ parameters decreased with the absorbed dose, while crosslinking density increased, which demonstrated that we obtained a superabsorbent hydrogel with a permanent structure.

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Radiation induced degradation of xanthan gum in the solid state

Cited by 20 publications

References 12 publications

E-Beam Processing of Collagen-Poly(N-vinyl-2-pyrrolidone) Double-Network Superabsorbent Hydrogels: Structural and Rheological Investigations

E-Beam Processing of Collagen-Poly(N-vinyl-2-pyrrolidone) Double-Network Superabsorbent Hydrogels: Structural and Rheological Investigations

Low Molecular Weight Xanthan Prepared by Gamma Irradiation and Their Effects to Development of Seedlings

Development of Novel Superabsorbent Hybrid Hydrogels by E-Beam Crosslinking

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