膜科学与技术

表面粗糙度对输液排气膜疏水性能的影响

作者：王?洪¹，王金成¹，吕永存²，辛公芬²，朱景元²

单位： 1东华大学纺织面料技术教育部重点实验室，上海201620） 2上海振浦医疗设备有限公司，上海200126

关键词：表面粗糙度；接触角；疏水；分形维数；Wenzel模型

出版年,卷(期):页码： 2016,36(2):70-75

摘要：

采用浸渍法在输液排气膜坯布表面引入粗糙结构，以提高排气膜的疏水性。用红外光谱表征处理前后样品表面的化学结构变化，用接触角表征坯布表面疏水性，并测试了处理前后坯布孔径及透气性变化。并用分形理论对处理前后坯布表面的粗糙度进行表征，同时对分形结构的Wenzel模型进行了验证。结果表明，通过在坯布表面引入粗糙PVDF（聚偏氟乙烯）颗粒，对进一步提高坯布的拒水性是可行的。

In this paper, in order to improve the water repellency of exhaust membrane for intravenous transfusion, rough surface was introduced on to the membrane by dipping method. The wettability of the exhaust membrane was characterized by contact angles. Chemical composition changes of samples before and after treatment were measured by the infrared spectrum, and pore size and permeability of the exhaust membrane before and after finishing were analyzed. The values of the fractal dimension describing roughness of untreated and treated membranes were calculated. And Wenzel model of fractal structure was verified. The results showed that it is feasible to further improve the water repellency of the membrane by introducing PVDF particles.

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