Preparation and Charactcrization of a Novel PDLLA/Chondroitin Sulfate/Chitosan Asymmetry Film
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2007年第4期
论文作者：闫玉华
文章页码：681 - 685
摘 要：<正>A novel bioactive and bioresorbable asymmetry film was prepared,The PDLLA membrane was activated by 1,6-hexanediamine to obtain a stable positive charge surface.Chondroitin sulfate and chitosan were then deposited on activated PDLLA membrane via layer-by-layer（LBL）electro-static assembly （ESA）technique.The deposition process was monitored by UV-Vis absorbance spectroscopy.The composite membrane was frozen lyophilized to form the asymmetry film and characterized by attenuated total reflectic （ATR）-FT-IR,XPS and SEM.The experimental results show that a stable 1,6-hexanediamme layer on PDLLA substrate based on the aminolysis of the polyester and the layer thickness increase linearly first with the increase of the deposited layers,and then increases slowly due to the layer interpenetration.The test results of ATR-FT- IR and SEM show the asymmetry film is modified uniformly with a dense inner layer and a porous sponge outer layer.
闫玉华
摘 要：<正>A novel bioactive and bioresorbable asymmetry film was prepared,The PDLLA membrane was activated by 1,6-hexanediamine to obtain a stable positive charge surface.Chondroitin sulfate and chitosan were then deposited on activated PDLLA membrane via layer-by-layer（LBL）electro-static assembly （ESA）technique.The deposition process was monitored by UV-Vis absorbance spectroscopy.The composite membrane was frozen lyophilized to form the asymmetry film and characterized by attenuated total reflectic （ATR）-FT-IR,XPS and SEM.The experimental results show that a stable 1,6-hexanediamme layer on PDLLA substrate based on the aminolysis of the polyester and the layer thickness increase linearly first with the increase of the deposited layers,and then increases slowly due to the layer interpenetration.The test results of ATR-FT- IR and SEM show the asymmetry film is modified uniformly with a dense inner layer and a porous sponge outer layer.
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