Biopolymer fibers have great potential for technical applications in biomaterials.The surface properties of fibers are of importance in these applications.In this study,electrospun poly(L-lactide)(PLLA)/poly(ε-caprol...Biopolymer fibers have great potential for technical applications in biomaterials.The surface properties of fibers are of importance in these applications.In this study,electrospun poly(L-lactide)(PLLA)/poly(ε-caprolactone)(PCL)membranes were modified by cold plasma treatment and coating gelatin to improve the surface hydrophilic properties.The morphologies of the fibers were observed by scanning electron microscopy(SEM).Atomic force microscopy(AFM)was employed to show the surface characteristics of the fibers.The chemical feature of the fibrous membrane surfaces was examined by X-ray photoelectron spectroscopy(XPS).The surface wettability of the fibrous membrane was also characterized by water contact angle measurements.All these results show that plasma treatment can have profound effects on the surface properties of fibrous membranes by changing their surface physical and chemical features.Gelatin-PLLA/PCL membrane has great potential in applications of tissue engineering scaffolds.展开更多
The aim of this paper was to prepare an artificial bile duct using polytetrafluoroethylene( PTFE) for the development of a new treatment for biliary diseases. The basic properties of the PTFE material,such as crystall...The aim of this paper was to prepare an artificial bile duct using polytetrafluoroethylene( PTFE) for the development of a new treatment for biliary diseases. The basic properties of the PTFE material,such as crystallization properties,were characterized; the surface structures of the sample tubes were observed by scanning electron microscope( SEM) and water permeability test of different tubes was evaluated by osmosis device. Six Shanghai white pigs were selected to do the implantation surgery of the artificial bile ducts. After 90 days,the artificial bile ducts were removed from the pigs and characterized by electron microscope in order to study the tissue compatibility. The results of animal test indicated that the artificial bile duct had good tissue compatibility. This new artificial bile duct shows great potential for the treatment of biliary diseases.展开更多
基金National Demonstration Center for Experimental Materials Science and Engineering Education(Donghua University),China。
文摘Biopolymer fibers have great potential for technical applications in biomaterials.The surface properties of fibers are of importance in these applications.In this study,electrospun poly(L-lactide)(PLLA)/poly(ε-caprolactone)(PCL)membranes were modified by cold plasma treatment and coating gelatin to improve the surface hydrophilic properties.The morphologies of the fibers were observed by scanning electron microscopy(SEM).Atomic force microscopy(AFM)was employed to show the surface characteristics of the fibers.The chemical feature of the fibrous membrane surfaces was examined by X-ray photoelectron spectroscopy(XPS).The surface wettability of the fibrous membrane was also characterized by water contact angle measurements.All these results show that plasma treatment can have profound effects on the surface properties of fibrous membranes by changing their surface physical and chemical features.Gelatin-PLLA/PCL membrane has great potential in applications of tissue engineering scaffolds.
基金State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,China ( No. LZ0902 )Natural Science Foundation of Shanghai,China ( No. 10ZR1400900)
文摘The aim of this paper was to prepare an artificial bile duct using polytetrafluoroethylene( PTFE) for the development of a new treatment for biliary diseases. The basic properties of the PTFE material,such as crystallization properties,were characterized; the surface structures of the sample tubes were observed by scanning electron microscope( SEM) and water permeability test of different tubes was evaluated by osmosis device. Six Shanghai white pigs were selected to do the implantation surgery of the artificial bile ducts. After 90 days,the artificial bile ducts were removed from the pigs and characterized by electron microscope in order to study the tissue compatibility. The results of animal test indicated that the artificial bile duct had good tissue compatibility. This new artificial bile duct shows great potential for the treatment of biliary diseases.
