Limits...
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.

Show MeSH
Morphology of ChS fibers: (a) ChS1; (b) ChS2; hybrid fibers: (c) ChS2P1; (d) ChS2P2.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f5-ijms-12-01908: Morphology of ChS fibers: (a) ChS1; (b) ChS2; hybrid fibers: (c) ChS2P1; (d) ChS2P2.

Mentions: Figure 5 shows the SEM images of Ch + S fibers (Figure 5a,b) and Ch + S + PET hybrid fibers (Figure 5c,d). Ch + S fibers prepared with starch 15 wt% (ChS1) are shown in Figure 5a, while fibers containing 30 wt% starch (ChS2) are seen in Figure 5b. Morphology of these fibers is different than that of chitosan fibers (Figure 4). ChS1 and ChS2 have more smooth surfaces, without the presence of brittle or porous regions. This effect is probably caused by the plasticizing behavior of starch. Ternary hybrid fibers do not show large differences from Ch + S fibers, as can be seen in Figure 5c,d. Fibers with 15 wt% PET (ChS2P1) have similar surface characteristics. In the case of fibers with 30 wt% PET (ChS2P2) needle shaped structures are observed, an effect probably produced by the synthetic polymer.


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)

Morphology of ChS fibers: (a) ChS1; (b) ChS2; hybrid fibers: (c) ChS2P1; (d) ChS2P2.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f5-ijms-12-01908: Morphology of ChS fibers: (a) ChS1; (b) ChS2; hybrid fibers: (c) ChS2P1; (d) ChS2P2.
Mentions: Figure 5 shows the SEM images of Ch + S fibers (Figure 5a,b) and Ch + S + PET hybrid fibers (Figure 5c,d). Ch + S fibers prepared with starch 15 wt% (ChS1) are shown in Figure 5a, while fibers containing 30 wt% starch (ChS2) are seen in Figure 5b. Morphology of these fibers is different than that of chitosan fibers (Figure 4). ChS1 and ChS2 have more smooth surfaces, without the presence of brittle or porous regions. This effect is probably caused by the plasticizing behavior of starch. Ternary hybrid fibers do not show large differences from Ch + S fibers, as can be seen in Figure 5c,d. Fibers with 15 wt% PET (ChS2P1) have similar surface characteristics. In the case of fibers with 30 wt% PET (ChS2P2) needle shaped structures are observed, an effect probably produced by the synthetic polymer.

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