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Enhancement of the surface hydrophilicity of biodegradable poly (D,L-lactic acid)(PLA) films is studied. The PLA films were treated by nitrogen plasma (PLA-N2) and nitrogen/hydrogen plasma (PLA-N_2/H_2), respectively. The surface properties and microstructure ofPLA-N_2 and PLA-N_2/H_2 were studied by static contact angle measurement, surface free energycalculation, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). It isconfirmed that the surface hydrophilicity of PLA-N_2 and PLA-N_2/H_2 was higher than that of pristinePLA, and the surface hydrophilicity of PLA-N_2 films was better than that of PLA-N_2/H_2.
Enhancement of the surface hydrophilicity of biodegradable poly (D, L-lactic acid) (PLA) films is studied. The PLA films were treated by nitrogen plasma (PLA-N2) and nitrogen / hydrogen plasma . The surface properties and microstructure of PLA-N_2 and PLA-N_2 / H_2 were studied by static contact angle measurement, surface free energycalculation, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). It isconfirmed that the surface hydrophilicity of PLA-N_2 and PLA-N_2 / H_2 was higher than that of pristine PLA, and the surface hydrophilicity of PLA-N_2 films was better than that of PLA-N_2 / H_2.