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首页> 外文期刊>Journal of Applied Polymer Science >REDUCED FRICTIONAL RESISTANCE OF POLYURETHANE CATHETER BY MEANS OF A SURFACE COATING PROCEDURE
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REDUCED FRICTIONAL RESISTANCE OF POLYURETHANE CATHETER BY MEANS OF A SURFACE COATING PROCEDURE

机译：通过表面涂层工艺降低聚氨酯导管的摩擦阻力

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摘要

Polyurethane and poly(vinyl pyrrolidone) (PVP)-coated polyurethane catheter surfaces were characterized by time of flight secondary ion mass spectrometry (TOF-SIMS) and were compared in terms of wettability and adhesion and friction properties by scanning force microscopy (SFM). Using TOF-SIMS, the presence of hard segments in the first layers of the polyurethane catheter were shown, and the presence of a PVP coating on the modified catheters was clearly identified. The PVP coating induced a hydrophilic surface after immersion of the catheters in water for several hours. When SFM experiments were carried out in water, the adhesive force developed between the PVP-coated surface and the tip became immeasurably small. Tribometric measurements along a 500-nm scan line quantified friction coefficients of 0.05 for the coated catheter and 0.50 for the native polyurethane catheter. The PVP coating on catheters provided smooth, soft, and nonadhesive surface properties, which would minimize difficulties during their insertion into the vessels of the patient. (C) 1996 John Wiley & Sons, Inc. [References: 26]
机译：通过飞行时间二次离子质谱（TOF-SIMS）对聚氨酯和聚乙烯吡咯烷酮（PVP）涂层的聚氨酯导管表面进行表征，并通过扫描力显微镜（SFM）对润湿性，粘附性和摩擦性能进行比较。使用TOF-SIMS，显示了在聚氨酯导管的第一层中存在硬段，并且清楚地识别出改性导管上存在PVP涂层。将导管浸入水中数小时后，PVP涂层会产生亲水表面。当在水中进行SFM实验时，在PVP涂层表面和尖端之间形成的粘合力变得很小。沿500 nm扫描线的摩擦测量结果表明，涂​​覆导管的摩擦系数为0.05，天然聚氨酯导管的摩擦系数为0.50。导管上的PVP涂层提供了光滑，柔软和非粘性的表面特性，这将使插入患者血管的困难最小化。 （C）1996 John Wiley＆Sons，Inc. [参考：26]

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