title: Effect of electron beam irradiation on the structure and properties of electrospun PLLA and PLLA/PDLA blend nanofibers.
abstract: Poly(L-lactide) (PLLA) and a PLLA/poly(D-lactide) (PDLA) blend (50/50 wt.%) were electrospun into nanofibers. Electron beam (e-beam) irradiation of the electrospun PLLA and blend nanofibers was used as a method to alter their structures and surface properties. The crystalline structures of the nanofibers before and after irradiation were investigated by differential scanning calorimetry. Tensile tests of the aligned nanofibers were also performed to determine the effects of irradiation on the mechanical properties of the nanofibers. The hydrophilicity of the nanofibers was determined by water contact angle measurements, while any degradation of the fibers caused by irradiation could be detected by intrinsic viscosity measurements. The e-beam irradiation method was able to improve the surface hydrophilicity of the PLLA and blend nanofibers, although bulk degradation was inevitable.
authors.affiliation: Department of Advanced Fibro-science, Kyoto Institute of Technology, Gosyokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
authors.forename: Xiwen
authors.initials: X
authors.lastname: Zhang
authors.forename: Masaya
authors.initials: M
authors.lastname: Kotaki
authors.forename: Satoko
authors.initials: S
authors.lastname: Okubayashi
authors.forename: Sachiko
authors.initials: S
authors.lastname: Sukigara
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning / Q000379:methods; D018360:Crystallography, X-Ray / Q000379:methods; D004307:Dose-Response Relationship, Radiation; D004563:Electrochemistry / Q000379:methods*; D004583:Electrons; D019344:Lactic Acid / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D057139:Nanofibers / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D011091:Polyesters; D011108:Polymers / Q000737:chemistry*; D013237:Stereoisomerism; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D014783:Viscosity
chemical_list: D001672:Biocompatible Materials; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide)