Electrospinning of hexanoyl chitosan/polylactide blends.
The electrospinning of hexanoyl chitosan (H-chitosan), polylactide (PLA) and their blends was performed using chloroform, dichloromethane or tetrahydrofuran as a spinning solvent. The as-spun PLA fibers appeared to be cross-sectionally round, with rough surface morphology, while the as-spun H-chitosan fibers were flat with smooth surface morphology. Electrospinning of the H-chitosan/PLA blend solutions in chloroform with the H-chitosan solution content of less than or equal to 50% (w/w) produced continuous fibers without the presence of beads, while that of the blend solutions in dichloromethane produced beaded fibers or even just beads at high H-chitosan solution contents. The size of the as-spun fibers from blend solutions with a H-chitosan solution content of less than or equal to 50% (w/w) was found to decrease with increasing the H-chitosan solution content. Thermal characteristics and crystalline structure of selected as-spun fibers from pure and blend solutions in chloroform were characterized by thermogravimetric analysis, differential scanning calorimetry and wide-angle X-ray diffraction (WAXD) techniques.
Peesan
Manisara
M
Technological Center for Electrospun Fibers, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok 10330, Thailand.
Rujiravanit
Ratana
R
Supaphol
Pitt
P
D001672:Biocompatible Materials / Q000737:chemistry; D002152:Calorimetry, Differential Scanning; D048271:Chitosan / Q000737:chemistry*; D002725:Chloroform / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D005663:Furans / Q000737:chemistry; D008752:Methylene Chloride / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D011091:Polyesters / Q000737:chemistry*; D014961:X-Ray Diffraction
D001672:Biocompatible Materials; D005663:Furans; D011091:Polyesters; C018674:tetrahydrofuran; C033616:poly(lactide); D008752:Methylene Chloride; D002725:Chloroform; D048271:Chitosan