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The influence of UV irradiation on surface composition. of collagen/PVP blended films

机译:紫外线辐射对表面成分的影响。 / PVP混合膜的制备

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The surface chemical composition and surface properties of collagen/poly(vinyl pyrrolidone) (PVP) blended films before and after UV irradiation (lambda = 254 nm) were investigated using X-ray Photoelectron Spectroscopy (XPS), FTIR-ATR spectroscopy and Atomic Force Microscopy (AFM). The XPS results showed that collagen is enriched on the surface of the collagen/PVP blend. The surface composition of the collagen film was changed more by UV irradiation than the surface composition of the collagen/PVP blend. FTIR-ATR spectra showed that the positions of the amide bands in collagen are more altered after UV irradiation than those for the collagen/ PVP blends. AFM images showed that the collagen surface is ordered contrary to PVP. The blend surface was similar to the pure collagen surface and confirms that there is more collagen present at the surface (higher concentration of collagen at the surface compared to PVP). UV irradiation caused only the small changes in the surface morphology of the collagen/PVP films. All of the results confirm that the surface of the collagen/PVP blend is more photoresistant than collagen. (c) 2006 Elsevier B.V. All rights reserved.
机译:使用X射线光电子能谱(XPS),FTIR-ATR光谱和原子力研究了紫外线/紫外线(λ= 254 nm)前后胶原/聚乙烯吡咯烷酮(PVP)混合膜的表面化学组成和表面性质显微镜(AFM)。 XPS结果表明胶原蛋白/胶原蛋白混合物的表面富含胶原蛋白。通过紫外线照射,胶原膜的表面组成比胶原/ PVP共混物的表面组成变化更大。 FTIR-ATR光谱表明,与胶原蛋白/ PVP混合物相比,紫外线照射后胶原蛋白中酰胺带的位置变化更大。 AFM图像显示胶原表面与PVP相反。共混物表面类似于纯胶原蛋白表面,并确认在表面上存在更多的胶原蛋白(与PVP相比,表面上的胶原蛋白浓度更高)。紫外线辐射仅引起胶原蛋白/ PVP膜表面形态的微小变化。所有结果证实,胶原蛋白/ PVP混合物的表面比胶原蛋白具有更高的耐光性。 (c)2006 Elsevier B.V.保留所有权利。

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