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Natural-synthetic hybrid polymers developed via electrospinning: the effect of PET in chitosan/starch system.

Espíndola-González A, Martínez-Hernández AL, Fernández-Escobar F, Castaño VM, Brostow W, Datashvili T, Velasco-Santos C - Int J Mol Sci (2011)

Bottom Line: Chitosan is an amino polysaccharide found in nature, which is biodegradable, nontoxic and biocompatible.Molecular interactions and orientation in the fibers are analyzed by infrared and Raman spectroscopies respectively, morphology by scanning electron microscopy and thermophysical properties by thermogravimetric analysis and differential scanning calorimetry.Addition of PET to Ch + S systems results in improved thermal stability at elevated temperatures.

View Article: PubMed Central - PubMed

Affiliation: College of Engineering, National Autonomous University of Mexico, Edificio Bernardo Quintana, Cd. Universitaria, CP. 04510, Mexico D.F., Mexico; E-Mail: ameg00@hotmail.com.

ABSTRACT
Chitosan is an amino polysaccharide found in nature, which is biodegradable, nontoxic and biocompatible. It has versatile features and can be used in a variety of applications including films, packaging, and also in medical surgery. Recently a possibility to diversify chitosan properties has emerged by combining it with synthetic materials to produce novel natural-synthetic hybrid polymers. We have studied structural and thermophysical properties of chitosan + starch + poly(ethylene terephthalate) (Ch + S + PET) fibers developed via electrospinning. Properties of these hybrids polymers are compared with extant chitosan containing hybrids synthesized by electrospinning. Molecular interactions and orientation in the fibers are analyzed by infrared and Raman spectroscopies respectively, morphology by scanning electron microscopy and thermophysical properties by thermogravimetric analysis and differential scanning calorimetry. Addition of PET to Ch + S systems results in improved thermal stability at elevated temperatures.

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Differential scanning calorimetry (DSC) curves of Ch, S, PET, Ch + S fibers and ternary hybrid fibers synthesized via electrospinning.
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f7-ijms-12-01908: Differential scanning calorimetry (DSC) curves of Ch, S, PET, Ch + S fibers and ternary hybrid fibers synthesized via electrospinning.

Mentions: Figure 7 shows the DSC diagrams for Ch, S, PET, Ch + S fibers and ternary fibers. We see an endothermic peak attributed to the melting temperature of chitosan fibers Tm ≈ 159 °C. Tm of starch (powder) and PET (pellets) are located at 119 and 258 °C respectively. Ch + S fibers that contain 15 wt% starch show a Tm at 175 °C (curve 1). However, when we have 30 wt% starch (curve 2), the Tm decreases to 147 °C, that is towards the melting temperature of pure starch.


Natural-synthetic hybrid polymers developed via electrospinning: the effect of PET in chitosan/starch system.

Espíndola-González A, Martínez-Hernández AL, Fernández-Escobar F, Castaño VM, Brostow W, Datashvili T, Velasco-Santos C - Int J Mol Sci (2011)

Differential scanning calorimetry (DSC) curves of Ch, S, PET, Ch + S fibers and ternary hybrid fibers synthesized via electrospinning.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3111641&req=5

f7-ijms-12-01908: Differential scanning calorimetry (DSC) curves of Ch, S, PET, Ch + S fibers and ternary hybrid fibers synthesized via electrospinning.
Mentions: Figure 7 shows the DSC diagrams for Ch, S, PET, Ch + S fibers and ternary fibers. We see an endothermic peak attributed to the melting temperature of chitosan fibers Tm ≈ 159 °C. Tm of starch (powder) and PET (pellets) are located at 119 and 258 °C respectively. Ch + S fibers that contain 15 wt% starch show a Tm at 175 °C (curve 1). However, when we have 30 wt% starch (curve 2), the Tm decreases to 147 °C, that is towards the melting temperature of pure starch.

Bottom Line: Chitosan is an amino polysaccharide found in nature, which is biodegradable, nontoxic and biocompatible.Molecular interactions and orientation in the fibers are analyzed by infrared and Raman spectroscopies respectively, morphology by scanning electron microscopy and thermophysical properties by thermogravimetric analysis and differential scanning calorimetry.Addition of PET to Ch + S systems results in improved thermal stability at elevated temperatures.

View Article: PubMed Central - PubMed

Affiliation: College of Engineering, National Autonomous University of Mexico, Edificio Bernardo Quintana, Cd. Universitaria, CP. 04510, Mexico D.F., Mexico; E-Mail: ameg00@hotmail.com.

ABSTRACT
Chitosan is an amino polysaccharide found in nature, which is biodegradable, nontoxic and biocompatible. It has versatile features and can be used in a variety of applications including films, packaging, and also in medical surgery. Recently a possibility to diversify chitosan properties has emerged by combining it with synthetic materials to produce novel natural-synthetic hybrid polymers. We have studied structural and thermophysical properties of chitosan + starch + poly(ethylene terephthalate) (Ch + S + PET) fibers developed via electrospinning. Properties of these hybrids polymers are compared with extant chitosan containing hybrids synthesized by electrospinning. Molecular interactions and orientation in the fibers are analyzed by infrared and Raman spectroscopies respectively, morphology by scanning electron microscopy and thermophysical properties by thermogravimetric analysis and differential scanning calorimetry. Addition of PET to Ch + S systems results in improved thermal stability at elevated temperatures.

Show MeSH