Mechanical properties and transition temperatures of crosslinked-oriented gelatin

Fakirov, S.; Sarac, Z.; Anbar, T.; Boz, B.; Bahar, İvet; Evstatiev, M.; Apostolov, A.; Mark, J. E.; Kloczkowski, A.

doi:10.1007/s003960050087

Cited by 53 publications

(24 citation statements)

References 6 publications

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“…The most common interpretation is related with recrystallization processes during the scanning in the DSC, although other reasons, as the coexistence of more than one crystalline population differing in their perfection, can lead to the same effect 14) . In the present case, the most probable reason for the observation of two melting peaks, as demonstrated in a previous study 12) , is a recrystallization process. This means that the crystallites created before placing the sample in the DSC apparatus melt at T9 m .…”

Section: Temperature and Heat Treatment Time Dependence Of Microhardnessmentioning

confidence: 70%

New aspects of thermal treatment effects on gelatin films studied by microhardness

Vassileva

Calleja²,

Cagiao

et al. 1999

Macromol. Chem. Phys.

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SUMMARY: Microhardness measurements were carried out using various treatment cycles, including heating and cooling during different treatment times at high temperatures. Two possible processes to explain the observed increase in the microhardness are proposed, namely crystallisation and crosslinking. In order to distinguish between these two alternatives, differential scanning calorimetry (DSC), wide-angle X-ray scattering (WAXS), and swelling kinetics measurements were performed. The observed decrease of crystallinity (from DSC and WAXS measurements) as well as the decrease of swelling ability with increasing temperature and duration of thermal treatment are in favour of the occurrence of crosslinking reactions during thermal treatment. It is suggested that the crosslinking, as a result of additional intra-and intermolecular condensation processes, leads to a denser chain packing in the amorphous gelatin and consequently to higher microhardness values.

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Section: Temperature and Heat Treatment Time Dependence Of Microhardnessmentioning

confidence: 70%

New aspects of thermal treatment effects on gelatin films studied by microhardness

Vassileva

Calleja²,

Cagiao

et al. 1999

Macromol. Chem. Phys.

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“…Therefore, how to reinforce gelatin materials becomes a challenge for worldwide researchers. Many attempts such as vapor crosslink, 2 orientation technique, [3][4][5] and gelatin-based composites filled with hydroxyapatite, 6 tricalcium phosphate, 7 and carbon fiber 8 have been made and great progress has been achieved. However, the strength is still not high enough, especially in the wet state.…”

Section: Introductionmentioning

confidence: 99%

“…Thermal properties of gelatin have been also improved mainly through an orientation technique. 4 However, there is still a long way to go before the application of high-performance gelatin or gelatin-based composites is perfected.…”

Section: Introductionmentioning

confidence: 99%

Gelatin/montmorillonite hybrid nanocomposite. I. Preparation and properties

Zheng

et al. 2002

J of Applied Polymer Sci

146

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Gelatin/montmorillonite (MMT) hybrid nanocomposite was directly prepared with unmodified MMT and gelatin aqueous solution. Thermal and mechanical properties of the composite were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and tensile tests. The results indicated that an intercalated or partially exfoliated nanocomposite could be achieved, and the properties of the composite were significantly improved. A T g peak of high temperature disappeared in the DSC curve of the composite, and the thermogravity and thermally decomposed rate decreased obviously. The tensile strength and Young's modulus were also improved notably, which varied with MMT content, as well as the pH of gelatin matrix. Meanwhile, SEM photographs showed a plasticizing trend of gelatin fracture surface due to intercalation with MMT. Furthermore, the wet mechanical behavior was initially studied.

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“…Previous studies showed that pure gelatin films are brittle, highly hydrophilic and easily attacked by bacteria [17,18]. Noticeable improvement in the mechanical properties of gelatin films in the direction of deformation can be seen by inducing segmental orientation in gelatin films [19][20][21][22]. Chemical and physical cross-linking indicated improved, as has been previously reported, stability [22].…”

Section: Introductionmentioning

confidence: 63%

Gelatin films dendronized selectively on one side: enhancing antimicrobial properties and water repellence

Schejtman¹,

Toselli

Strumia³

et al. 2015

Polym. Bull.

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To develop a material with potential biomedical applications, novel gelatin films were prepared by cold-casting method using cerium(III) and genipin solution as cross-linking agents, and surface modified with dendritic molecules. The structure and properties of the synthesized gelatin films were investigated by ATR-FTIR, mechanical tests, swelling behavior and water vapor permeability (WVP). The results showed that cross-linking could improve the mechanical and microbiological properties and lower the hydrophilic property of gelatin films. According to ATR-FTIR analysis, it can be concluded that the dendronization took place on only one of the faces of the films. The results have shown that the experimental methodology performed allows one-surface modification, so a novel biomaterial was obtained in the form of a film with good properties and dendritic structure in one face (hydrophobic and hydrophilic faces), rendering a multivalent structure useful in biomedicine development.

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Mechanical properties and transition temperatures of crosslinked-oriented gelatin

Cited by 53 publications

References 6 publications

New aspects of thermal treatment effects on gelatin films studied by microhardness

New aspects of thermal treatment effects on gelatin films studied by microhardness

Gelatin/montmorillonite hybrid nanocomposite. I. Preparation and properties

Gelatin films dendronized selectively on one side: enhancing antimicrobial properties and water repellence

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