Effect of electron beam irradiation on the structure and properties of electrospun PLLA and PLLA/PDLA blend nanofibers |
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| Authors: | Xiwen Zhang Masaya Kotaki Satoko Okubayashi Sachiko Sukigara |
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| Affiliation: | 1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;2. Zhejiang Hisun Biomaterials Co., Ltd, Taizhou 31800, Zhejiang, China;1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;2. Department of Chemistry, Tsinghua University, Beijing 100084, China;3. University of Chinese Academy of Sciences, Beijing 100039, China;1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China;2. College of Chemical Engineering, Sichuan University, Chengdu, 610065, China;3. Corbion Purac China, Unit 08-09, 30F, #6088 Humin Road, Minhang District, Shanghai 201199, China;1. Polymer and Composite Division, Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China;2. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, PR China;3. Qingdao University of Science & Technology, Qingdao 266000, PR China |
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| 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. |
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