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Chemcial Industry and Engineering 2004, Vol. 21 Issue (1) :17-20    DOI:
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Surface Modification of Poly (d,l-lactic acid) Microspheres by Ammonia Low-Temperature Plasma
CHANG Jiang,SHENG Jing,CHANG Jin,YUAN Xu-bo(School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China)
(School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China)

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Abstract The hydrophobic poly (d,l-lactic acid)(PDLLA) micropsheres were prepared in poly vinyl alcohol and chitosan solution respectively as aqueous phase,and then modified by low-temperature plasma technique.Surfaces of microspheres treated by ammonia plasma were characterized with X-ray photoelectron spectroscopy (XPS),and their wettability was studied by Contact Angle and Thin Layer Wicking measurements.It is obtained that groups contained nitrogen atoms could be introduced into the surfaces of the microspheres surfaces by low-temperature ammonia plasma.The hydrophilic character of the modified surfaces was increased in comparison with that of the parent microspheres.The contact angle for modified PDLLA microspheres were reduced apparently.
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Received 2004-01-15; published 2004-01-15
Cite this article:   
CHANG Jiang,SHENG Jing,CHANG Jin,YUAN Xu-bo.Surface Modification of Poly (d,l-lactic acid) Microspheres by Ammonia Low-Temperature Plasma[J]  Chemcial Industry and Engineering, 2004,V21(1): 17-20
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