Surface Modification of Biodegradable Poly(D,L-lactic acid) by Nitrogen and Nitrogen/Hydrogen Plasma for Improving Surface Hydrophilicity

ZHAO Guowei; GAO Junping; GAO Qiang; CHEN Yashao

Plasma Science and Technology > 2011 > 13(2): 230-234.

ZHAO Guowei, GAO Junping, GAO Qiang, CHEN Yashao. Surface Modification of Biodegradable Poly(D,L-lactic acid) by Nitrogen and Nitrogen/Hydrogen Plasma for Improving Surface Hydrophilicity[J]. Plasma Science and Technology, 2011, 13(2): 230-234.

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Surface Modification of Biodegradable Poly(D,L-lactic acid) by Nitrogen and Nitrogen/Hydrogen Plasma for Improving Surface Hydrophilicity

1 Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education, School of Chemistry and Materials Science, Xi’an 710062, China 2 Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiang Xi University of Traditional Chinese Medicine, Nanchang 330004, China 3 School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China

Funds: Supported by the Fundamental Research Funds for the Central Universities (No. GK200901023, GK201004001).

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Abstract

Abstract

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-N2/H2), respectively. The surface properties and microstructure of PLA-N2 and PLA-N2/H2 were studied by static contact angle measurement, surface free energy calculation, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). It is confirmed that the surface hydrophilicity of PLA-N2 and PLA-N2/H2 was higher than that of pristine PLA, and the surface hydrophilicity of PLA-N2 films was better than that of PLA-N2/H2.
- plasma,
- surface modification,
- PLA films,
- hydrophilicity

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