The melt electrospinning of PMMA was investigated. The averaged fiber diameter thus obtained was reduced from 34.0 μm to 19.7 μm by adding di-（2-ethylhexyl）phthalate to reduce viscosity of the molten PMMA, and it ...The melt electrospinning of PMMA was investigated. The averaged fiber diameter thus obtained was reduced from 34.0 μm to 19.7 μm by adding di-（2-ethylhexyl）phthalate to reduce viscosity of the molten PMMA, and it further lowered down to 4.0 μm when a KCl/ice-water solution was used as collection media. A comparison study on the PMMA fibers made through melt electrospinning and done by solution electrospinning was made. It was found that solution electrospinning was capable of fabricating very thin fibers as small as to a nanometer size, but resulted in a much wider fiber diameter range than melt-electrospinning did. In general, within some extent an increase in applied voltage and amount of the additive or a decrease in collection distance can give rise to a decreased fiber diameter and improved mechanical performance for the PMMA fibers by melt electrospinning. It was also indicated that the mechanical properties of the PMMA fibers made through melt-electrospinning were superior to those by solution elctropspinning.展开更多
The general object of research is to design new idea of the semi-biodegradable,multilayered vascular prosthesis used for the reconstruction of significantly small diameter vascular vessels( microreconstruction). The p...The general object of research is to design new idea of the semi-biodegradable,multilayered vascular prosthesis used for the reconstruction of significantly small diameter vascular vessels( microreconstruction). The paper studies the selection of appropriate sterilization technique for resorbable tubular structures made of poly( L-lactide-co-glicolide)( PLAGA) and nonbiodegradable tubular structures made of polypropylene( PP). The designed grafts are characterized by the physical properties as well as mechanical properties according to ISO 7198 ∶ 1998 Standard.Moreover,the process of the grafts fabrication will be explained considering the stages affected the critical properties of the elaborated textile implants. The increase of PLAGA melt-electrospun tubular structures mechanical properties was observed due to the thermal stabilization use. The ethylene oxide( EO) and steam sterilization had a destructive effect on the designed PLAGA meltelectrospun tubular, fibrous structures, whereas the irradiation yielded in the changes in mechanical and physical properties on the acceptable level,taking into account the future clinical applications.展开更多
基金supported by the National Natural Science Foundations of China(No.50773054)
文摘The melt electrospinning of PMMA was investigated. The averaged fiber diameter thus obtained was reduced from 34.0 μm to 19.7 μm by adding di-（2-ethylhexyl）phthalate to reduce viscosity of the molten PMMA, and it further lowered down to 4.0 μm when a KCl/ice-water solution was used as collection media. A comparison study on the PMMA fibers made through melt electrospinning and done by solution electrospinning was made. It was found that solution electrospinning was capable of fabricating very thin fibers as small as to a nanometer size, but resulted in a much wider fiber diameter range than melt-electrospinning did. In general, within some extent an increase in applied voltage and amount of the additive or a decrease in collection distance can give rise to a decreased fiber diameter and improved mechanical performance for the PMMA fibers by melt electrospinning. It was also indicated that the mechanical properties of the PMMA fibers made through melt-electrospinning were superior to those by solution elctropspinning.
基金European Regional Development Fund(No.WND-POIG.01.03.01-00-007/08-00)
文摘The general object of research is to design new idea of the semi-biodegradable,multilayered vascular prosthesis used for the reconstruction of significantly small diameter vascular vessels( microreconstruction). The paper studies the selection of appropriate sterilization technique for resorbable tubular structures made of poly( L-lactide-co-glicolide)( PLAGA) and nonbiodegradable tubular structures made of polypropylene( PP). The designed grafts are characterized by the physical properties as well as mechanical properties according to ISO 7198 ∶ 1998 Standard.Moreover,the process of the grafts fabrication will be explained considering the stages affected the critical properties of the elaborated textile implants. The increase of PLAGA melt-electrospun tubular structures mechanical properties was observed due to the thermal stabilization use. The ethylene oxide( EO) and steam sterilization had a destructive effect on the designed PLAGA meltelectrospun tubular, fibrous structures, whereas the irradiation yielded in the changes in mechanical and physical properties on the acceptable level,taking into account the future clinical applications.
