Water-insoluble thin films from palmitoyl hyaluronan with tunable properties

Foglarová, Marcela; Chmelař, Josef; Huerta-Ángeles, Gloria; Vágnerová, Hana; Kulhánek, Jaromír; Tománková, Kateřina; Minařík, Antonín; Velebný, Vladimı́r

doi:10.1016/j.carbpol.2016.02.027

Cited by 20 publications

(13 citation statements)

References 26 publications

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“…The surface energy also directly effects internal stress in the polymer foils and thus determines their appearance and application potential. On the other hand, the surface chemistry of the substrate is not the only condition that produces an internal stress-free foil with a smooth surface [49]; see Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

A special instrument for the defined modification of polymer properties in solutions and polymer layers

et al. 2017

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Section: Resultsmentioning

confidence: 99%

A special instrument for the defined modification of polymer properties in solutions and polymer layers

et al. 2017

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“…The pHA films were prepared in a specially constructed solution casting apparatus, where the solution is evaporated in a closed cell. Heating is provided by a bottom temperature regulation plate, which is in direct contact with the substrate.…”

Section: Methodsmentioning

confidence: 99%

“…The films were prepared as follows . First, the pHA solution was prepared by dissolving pHA powder in 50% (w/w) aqueous 2‐propanol.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, we decided to provide detailed and representative visualizations of regular convective patterns. Inspiration for this work stemmed from our previous experiments with hyaluronan‐based films prepared by solution casting . The desired quality of pattern visualization was enabled by choosing appropriate visualization techniques.…”

Section: Introductionmentioning

confidence: 99%

“…During drying, the composition of the mixed solvent gradually changes, resulting in the phase‐separation of acyl‐hyaluronan chains with certain substitution degrees and/or molecular weights. This leads to the formation of microparticles, which are then distributed throughout the film by the convective flow, thus highlighting the flow patterns and enabling their visualization without the use of contrasting agents . Furthermore, we studied the effects of the initial height of the solution layer, the polymer concentration in solution, and the degree of hyaluronan acylation on the resulting convective pattern.…”

Section: Introductionmentioning

confidence: 99%

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Convective Patterns in Solution‐Casted Films from Acylated Hyaluronan

Chmelař

Mrázek

Dusankova

et al. 2019

Macro Chemistry & Physics

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The evaporation of thin solution layers is an important process taking place in fields such as distillation, coating, or thin film manufacturing. Under suitable conditions, evaporation can induce convective flow by creating gradients in surface tension (Bénard–Marangoni instability) or density. These phenomena have been studied by many authors, but detailed and illustrative visualizations of real experiments are surprisingly scarce compared to simulation results and drawn schemes. Therefore, detailed and representative visualizations of regular Bénard–Marangoni convective cell patterns are provided in solution‐casted films from acylated hyaluronan. The visualizations agree with predictions made in the literature, thus providing important experimental validation. Most importantly, structures resulting from both horizontal and vertical convective flow are clearly visible. In a subsequent parametric study, the effects of selected parameters on the size of the convective cells are elucidated. The results suggest that the cell size increases with increasing solution layer height and increasing polymer concentration, while no statistically significant effect is observed for the degree of hyaluronan substitution.

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Combined effect of transglutaminase and phenolic extract of Spirulina platensis in films based on starch and gelatin recovered from chrome III tanned leather waste

Rosseto

Rigueto

Krein

et al. 2021

Biofuels Bioprod Bioref

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This study aimed to enhance the properties of films produced from corn starch and gelatin recovered from chrome (III) tanned leather waste (CTLW) through the addition of transglutaminase enzyme (TGase) and phenolic extracts from Spirulina platensis (PESP). Mechanical, chemical, physical, and biological properties were analyzed and compared with control films elaborated in the same conditions but with commercial gelatin (COM). The possibility of applying the film as soil cover was analyzed through its degradation when exposed to the surface of a garden soil for a period of 60 days. The TGase caused a reduction of 50% in solubility in water, and 2% in the water vapor permeability (PWV), and PESP caused a reduction of 17% in solubility and 15% in PWV. The combined effect of TGase and PESP was a 60% reduction in solubility, 75% reduction in PWV, inhibition of contamination by Aspergillus niger, and reduction of film degradation on soil covering, evidenced by stability analysis using Fourier transform infrared (FTIR) spectrometry. The combined effect of TGase with PESP led to an improvement in the characteristics of the film produced with CTLW gelatin, rendering its application possible due to a higher lifespan, contributing to environmental sustainability and diminishing leather waste disposal at landfills. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd

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Water-insoluble thin films from palmitoyl hyaluronan with tunable properties

Cited by 20 publications

References 26 publications

A special instrument for the defined modification of polymer properties in solutions and polymer layers

A special instrument for the defined modification of polymer properties in solutions and polymer layers

Convective Patterns in Solution‐Casted Films from Acylated Hyaluronan

Combined effect of transglutaminase and phenolic extract of Spirulina platensis in films based on starch and gelatin recovered from chrome III tanned leather waste

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