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首页> 外文期刊>Journal of Applied Polymer Science >Diffusion behavior of poly(ethylene imine) into keratin fibers using microspectro-photometry
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Diffusion behavior of poly(ethylene imine) into keratin fibers using microspectro-photometry

机译：显微分光光度法测定聚乙烯亚胺在角蛋白纤维中的扩散行为

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摘要

In order to investigate the diffusion behavior of poly(ethylene imine) (PEI) into keratin fibers, cross-sectional samples of bleached white human hair treated with PEI were prepared. We were successful in developing a method for analyzing the diffusion behavior of PEI into human hair, which to our knowledge is a first. The diffusion pattern of PEI into human hair, which cannot be determined by optical microscopy, can be determined by Our method. After the treatment, the cross-sectioned hair samples were dyed with Orange II and the cross-sectional intensity scans were measured at a wavelength of 487 nm (λ(max) of Orange II) with a microspectrophotometer. In our method, the diffusion pattern of PEI at pH 11.1 showed Fickian type characteristics. This suggests that the diffusion coefficient of PEI is essentially independent of the PEI concentration. By calculating the diffusion coefficient from the PEI concentration profile, the diffusion coefficient of PEI [number-average molecular weight (M-n) = 300 and 600] into the bleached human hair was found to be on the order of 10(-10) cm(2)/s. In addition, the diffusion coefficient of PEI (M-n= 600) with urea added increased twofold in comparison with that of PEI without urea added. This experiment demonstrated that urea acts as a penetration accelerator for PEI. © 2005 Wiley Periodicals, Inc.
机译：为了研究聚乙烯亚胺（PEI）在角蛋白纤维中的扩散行为，制备了经过PEI处理的漂白白色人发的横截面样品。我们成功开发了一种分析PEI在人发中的扩散行为的方法，据我们所知，这是第一个方法。 PEI在人发中的扩散模式无法通过光学显微镜确定，可通过Our方法确定。处理后，将截面的头发样品用Orange II染色，并用显微分光光度计在487 nm的波长（Orange II的λ（最大值））处测量截面强度扫描。在我们的方法中，PEI在pH 11.1的扩散模式表现出Fickian型特征。这表明PEI的扩散系数基本上与PEI浓度无关。通过从PEI浓度曲线计算扩散系数，发现PEI在漂白的人发中的扩散系数[数均分子量（Mn）= 300和600]约为10（-10）cm（ 2）/秒另外，与不添加尿素的PEI相比，添加尿素的PEI（M-n ＝ 600）的扩散系数增加了两倍。该实验证明尿素充当PEI的渗透促进剂。 ＆复制; 2005 Wiley期刊公司

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