| SURFACE OF GELATIN MODIFIED POLY(L-LACTIC ACID)FILM |
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| 作者姓名： | 姚康德 |
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| 作者单位： | Researeh Institute |
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| 摘 要： | In this paper, the surface structure of poly(L-lactic acid) (PLLA) film modified with gelatin was investigated. ThePLLA film specimens were treated directly with aqueous alkali solution to provide their surfaces with carboxyl groups, sothat these functional groups could become the reactive sites for gelatin immobilization. The functional groups of the PLLAfilms were identified by ATR-FTIR spectra and XPS spectra, the changes in surface morphology were observed by usingenvironmental scanning electron microscopy (ESEM), and the hydrophilicity of modified PLLA films was examined bywater contact angle measurement. Experimental results showed that the gelatin was immobilized with water-solublecarbodiimide (EDC) onto the PLLA film's surfaces, and the gelatin content on the polymer surface was related to carboxylicgroup 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.
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| 关 键 词： | Gelatin Poly（L-lactic acid） Surface modification |
| 收稿时间： | 2002-03-11 |
| 修稿时间： | 2002-05-20 |
SURFACE OF GELATIN MODIFIED POLY(L-LACTIC ACID)FILM* |
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| Xin Hou,Bao-long Zhang,Feng She,Yuan-lu Cui,Ke-yu Shi,Kang-de Yao.SURFACE OF GELATIN MODIFIED POLY(L-LACTIC ACID)FILM[J].Chinese Journal of Polymer Science,2003,0(3):277-283. |
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| Authors: | Xin Hou Bao-long Zhang Feng She Yuan-lu Cui Ke-yu Shi Kang-de Yao |
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| Institution: | a.Researeh Institute of Polymeric Materials; Tianjin University; Tianjin 300072; China b.Department of Chemistry; Nankai University Tianjin 300071; China |
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| Abstract: | In this paper, the surface structure of poly(L-lactic acid) (PLLA) film modified with gelatin was investigated. ThePLLA film specimens were treated directly with aqueous alkali solution to provide their surfaces with carboxyl groups, sothat these functional groups could become the reactive sites for gelatin immobilization. The functional groups of the PLLAfilms were identified by ATR-FTIR spectra and XPS spectra, the changes in surface morphology were observed by usingenvironmental scanning electron microscopy (ESEM), and the hydrophilicity of modified PLLA films was examined bywater contact angle measurement. Experimental results showed that the gelatin was immobilized with water-solublecarbodiimide (EDC) onto the PLLA film's surfaces, and the gelatin content on the polymer surface was related to carboxylicgroup 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. |
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| Keywords: | Gelatin Poly(L-lactic acid) Surface modification |
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