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SURFACE OF GELATIN MODIFIED POLY(L-LACTIC ACID) FILM
Ist Teil von
高分子科学(英文版), 2003-05, Vol.21 (3), p.277-283
Ort / Verlag
Research Institute of Polymeric Materials, Tianjin University, Tianjin 300072, China%Department of Chemistry, Nankai University, Tianjin 300071, China
Erscheinungsjahr
2003
Beschreibungen/Notizen
In this paper, the surface structure of poly(L-lactic acid) (PLLA) film modified with gelatin was investigated. The PLLA film specimens were treated directly with aqueous alkali solution to provide their surfaces with carboxyl groups, so that these functional groups could become the reactive sites for gelatin immobilization. The functional groups of the PLLA films were identified by ATR-FTIR spectra and XPS spectra, the changes in surface morphology were observed by using environmental scanning electron microscopy (ESEM), and the hydrophilicity of modified PLLA films was examined by water contact angle measurement. Experimental results showed that the gelatin was immobilized with water-soluble carbodiimide (EDC) onto the PLLA film's surfaces, and the gelatin content on the polymer surface was related to carboxylic group formed in the controlled hydrolysis process. Rough surfaces caused by hydrolysis will predominantly favor the adhesion and growth of cell; and the hydrophilicity of these surfaces after the modification procedure is enhanced.
Sprache
Englisch
Identifikatoren
ISSN: 0256-7679
eISSN: 1439-6203
DOI: 10.3321/j.issn:0256-7679.2003.03.003
Titel-ID: cdi_wanfang_journals_cjps_e200303003
Format
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