Compatibility of fibroin/chitosan and fibroin/cellulose blends studied by thermal analysis

Sashina, E. S.; Janowska, G.; Zaborski, Marian; Vnuchkin, A. V.

doi:10.1007/s10973-006-7676-1

Cited by 50 publications

(24 citation statements)

References 23 publications

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“…The peak of thermal decomposition of F1 shifted to a lower temperature (285°C as shown by the dashed line a) with less intensity, by the lower degree of molecular orientation when compared to DSC trace of the F2 with b-sheet (silk II) conformation. The peak positions were consistent with reported DSC traces of the silk I and silk II type fibroin [25,[28][29][30]. F3 represented the DSC trace of the SF-HA physical mixture prepared at pH 5.5 with a SF:HA mass ratio of 20, which corresponded to 1:1 pairing of the charged groups on the biopolymers.…”

Section: Thermal Analysissupporting

confidence: 84%

Characterization of silk fibroin/hyaluronic acid polyelectrolyte complex (PEC) films

Malay

Yalçın

Batıgün

et al. 2008

J Therm Anal Calorim

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This study aimed the characterization of the films casted from the aqueous mixtures of the pH induced complexes between silk fibroin (SF) and hyaluronic acid (HA). The insoluble and transparent films were subjected to scanning electron microscopy (SEM) analyses to show the morphological changes. Thermal analysis of complex films was determined by a differential scanning calorimeter (DSC). The changes in the crystalline state were monitored by X-ray diffractometer (XRD) and Fourier transform infrared spectroscopy (FTIR). It was shown that the complexation between HA and SF was dominantly induced by pH. It was shown that the complex films comprised mixtures of crystalline and non-crystalline regions.

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Section: Thermal Analysissupporting

confidence: 84%

Characterization of silk fibroin/hyaluronic acid polyelectrolyte complex (PEC) films

Malay

Yalçın

Batıgün

et al. 2008

J Therm Anal Calorim

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“…If respective hydrogel films have no difference in the chain flexibility of PEG component, the value of glass transition temperature of the hydrogel films was expected to decrease with increasing the fraction of diepoxyPEG, approaching to that of pure diepoxyPEG (about À50 C) with increasing the content of diepoxyPEG, as predicted by the Flory-Fox equation. [22][23][24] In this study, however, the T g values increased with the content of diepoxyPEG. This may be related to the density of the internal matrix which was formed by cross-linking reaction.…”

Section: Resultsmentioning

confidence: 72%

Characterization and enzymatic degradation of PEG‐cross‐linked chitosan hydrogel films

Tanuma

Kiuchi

Kai

et al. 2009

J of Applied Polymer Sci

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In our previous study (Kiuch et al., J Appl Polym Sci 2008, 107, 3823), poly(ethylene glycol) (PEG) cross-linked chitosan hydrogel films with various PEG to chitosan ratio and PEG molecular weight have been successfully prepared and their thermal, mechanical and swelling properties at acidic pH were studied. These films are potential biodegradable polymeric materials, because their constituents, that is, chitosan and PEG, are well known as biodegradable polymers. In this study, glass transition temperature (T g ), contact angle, swelling behavior at physiological conditions and in vitro enzymatic degradation behavior were investigated for the PEG-crosslinked chitosan hydrogel films. These properties of chitosan hydrogel were found to change significantly upon introducing the PEG-cross-links. According to differential scanning calorimeter analysis, the T g value increased with the PEG content in the hydrogel films, indicating the densification of the film by PEG-crosslinking. The contact angle was decreased with increasing the number of crosslinks, reflecting that introduction of the cross-linked structure induced the reduction of chitosan ordered structure. The swelling behavior depended on the PEG to chitosan ratio and the cross-linked structure. The water content was changed with the number of PEG-crosslinks. The rate of lysozyme-catalyzed degradation was also influenced by the introduction of PEG-cross-linked structure. The surface morphology of the film was observed by the scanning electron microscopy. It was confirmed that the PEG-crosslinked chitosan hydrogel film was degraded by lysozyme from its surface area.

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“…CHI has active sites capable of interacting with SF macromolecules, which is a necessary condition for the compatibility of polymers in solutions and films [11].…”

Section: Open Accessmentioning

confidence: 99%

“…In addition, an endothermic peak at 204.6 °C and an exothermic peak at 224 °C were observed (in the scale shown in Figure 3, these peaks are slightly observed). The endothermic peak is attributed to the molecular motion within the α-helix crystals and the exothermic peak is attributed to the crystallization during heating from a silk I to a silk II structure [11,16].…”

Section: Thermal Analysismentioning

confidence: 99%

Preparation and Characterization of Insoluble Silk Fibroin/Chitosan Blend Films

et al. 2010

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Abstract:The aim of this study was to prepare and characterize membranes of silk fibroin (SF) and chitosan (CHI) blends. Moreover, a conformation transition of SF to a more stable form induced by the addition of CHI was verified. Blend membranes were prepared, after pH adjustment, in different ratios, and physical integrity, crystallinity, structural conformation and thermal stability were characterized. The results of crystallographic analysis (XRD) indicated the tendency to higher structural organization caused by the addition of CHI. Fourier transformed infrared spectroscopy (FTIR) showed that SF is present in a more stable form in the presence of a CHI content of only 25 wt%. Thermal analysis indicated that SF is thermally stable and that when its proportion in the blend increases, the temperature at which degradation is initiated also increases.

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Compatibility of fibroin/chitosan and fibroin/cellulose blends studied by thermal analysis

Cited by 50 publications

References 23 publications

Characterization of silk fibroin/hyaluronic acid polyelectrolyte complex (PEC) films

Characterization of silk fibroin/hyaluronic acid polyelectrolyte complex (PEC) films

Characterization and enzymatic degradation of PEG‐cross‐linked chitosan hydrogel films

Preparation and Characterization of Insoluble Silk Fibroin/Chitosan Blend Films

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