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首页> 外文期刊>Applied Surface Science >The wettability of a cellulose acetate membrane in the presence of bovine serum albumin
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The wettability of a cellulose acetate membrane in the presence of bovine serum albumin

机译：牛血清白蛋白存在下醋酸纤维素膜的润湿性

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The measurements of the contact angle for water (W), glycerol (G), formamide (F), ethylene glycol (E) and diiodomethane (D) on a bare cellulose acetate membrane and covered by adsorptive bovine serum albumin (BSA) films were made. The adsorption was performed from solutions in concentration range 0-100 mg/ml. An influence of the membrane porosity on an apparent contact angle was discussed and Cassie and Baxter equation was used for that purpose. It was suggested that some liquids could penetrate in to membrane pores reducing its apparent porosity. To explain such behaviour, the spreading coefficient and the work of adhesion was calculated for the studied liquids. Components and parameters of the surface free energy of a bare cellulose acetate membrane and covered by an adsorptive BSA film were determined for W-G-D, W-F-D and G-F-D three-liquid systems and they were similar for these systems. However, for the hydrated BSA layer those components and parameters for the systems W-G-D, W-F-D were different than those for the system G-F-D. It was stated that after BSA adsorption on that membrane percentage of empty pores decreased, reducing their number almost to 0, at the highest BSA concentrations. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 25]
机译：在裸露的醋酸纤维素膜上并被吸附性牛血清白蛋白（BSA）膜覆盖的水（W），甘油（G），甲酰胺（F），乙二醇（E）和二碘甲烷（D）的接触角的测量结果为制作。从浓度范围为0-100 mg / ml的溶液中进行吸附。讨论了膜孔隙度对表观接触角的影响，并为此目的使用了Cassie和Baxter方程。建议某些液体可以渗透到膜孔中，从而降低其表观孔隙率。为了解释这种行为，计算了所研究液体的扩散系数和粘附功。对于W-G-D，W-F-D和G-F-D三液系统，确定了醋酸纤维素裸膜和被吸附性BSA膜覆盖的表面自由能的成分和参数，这些系统相似。但是，对于水合BSA层，系统W-G-D，W-F-D的那些组件和参数与系统G-F-D的那些不同。据指出，在最高BSA浓度下，BSA吸附在该膜上后，空孔百分比降低，其数量几乎减少至0。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：25]

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