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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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A schematic of electrospinning.
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f1-ijms-12-01908: A schematic of electrospinning.

Mentions: The electrospinning equipment includes three main components: a high voltage supplier, a capillary tube with a pipette or a needle of small diameter, and a metal collecting screen. One electrode is placed into the polymer solution and the other is attached to the collector (Figure 1). The process is initiated when a high voltage is applied; this causes the electrostatic force in the polymer solution to overcome the surface tension and creates an electrically charged jet of polymer solution out of the pipette. The solution jet passes a controlled distance between the pipette tip and the collector. Before reaching the collecting screen the solution jet evaporates, leaving behind charged polymer fibers that are assembled on the screen as an interconnected web of small fibers [10,11].


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)

A schematic of electrospinning.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f1-ijms-12-01908: A schematic of electrospinning.
Mentions: The electrospinning equipment includes three main components: a high voltage supplier, a capillary tube with a pipette or a needle of small diameter, and a metal collecting screen. One electrode is placed into the polymer solution and the other is attached to the collector (Figure 1). The process is initiated when a high voltage is applied; this causes the electrostatic force in the polymer solution to overcome the surface tension and creates an electrically charged jet of polymer solution out of the pipette. The solution jet passes a controlled distance between the pipette tip and the collector. Before reaching the collecting screen the solution jet evaporates, leaving behind charged polymer fibers that are assembled on the screen as an interconnected web of small fibers [10,11].

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