Poly(vinyl chloride) surface modification using tetrafluoroethylene in atmospheric pressure glow discharge
Poly(vinyl chloride) surface modification using tetrafluoroethylene in atmospheric pressure glow discharge
复制标题
DOI：
10.1021/la990039l
复制
发表时间：
1999-09-28
期刊：
影响因子：
3.9
通讯作者：
Kodama, M
中科院分区：
文献类型：
--
作者：
Babukutty, Y;Prat, R;Kodama, M
利用常压辉光等离子体对市售聚氯乙烯（PVC）管样品的内表面进行修饰，通过聚合四氟乙烯（TFE）来提高其生物相容性。改性表面的组成和性能与聚四氟乙烯相似。tfe涂层表面的x射线光电子能谱（XPS）显示出约689 eV的F1s峰和约292 eV的C1s峰。tfe涂层表面氟浓度高达63%，氯明显缺失。通过对PTFE涂层表面的衰减全反射傅里叶变换红外分析，我们获得了A(1200)/A（1720）的高吸光度比（由于PVC中的增塑剂，PTFE在1200 cm（-1）处的吸光度峰与衬底在1720 cm（-1）处的吸光度峰），表明富氟涂层表面。新成型表面的接触角（100-110度）与聚四氟乙烯相似。原子力显微镜观察表明，改性后的表面比PVC基材表面粗糙度小。载气（氦气）和反应气（TFE）的流速影响表面涂层的效率。氦气的流速在500到1000似乎（标准立方厘米每分钟）之间，TFE的流速在2到3似乎之间是获得均匀厚的表面涂层的最佳选择。
Atmospheric pressure glow plasma was used to modify the inner surface of a commercially available poly(vinyl chloride) (PVC) tube sample to enhance the biocompatible properties by polymerizing tetrafluoroethylene (TFE). The composition and properties of the modified surface were similar to those of PTFE. X-ray photoelectron spectroscopy (XPS) of the TFE-coated surface revealed an F1s peak at approximately 689 eV and a C1s at approximately 292 eV. The TFE-coated surface had a surface fluorine concentration as high as 63% with a conspicuous absence of chlorine. From attenuated total reflectance Fourier transform infrared analysis of the TFE-coated surface, we obtained high absorbance ratios of A(1200)/A(1720) (PTFE absorbance peak at 1200 cm(-1) versus that of the substrate peak at 1720 cm(-1) due to plasticizer in PVC) indicating a fluorine-rich coated surface. The contact angles of the newly formed surfaces (100-110 degrees) were similar to that of PTFE. Atomic force microscopy showed that the modified surface was less rough than the surface of the substrate PVC. The flow rate of carrier gas (helium) and reactive gas (TFE) influenced the efficiency of surface coating. A helium flow rate of between 500 and 1000 seem (standard cubic centimeters per minute) and TFE flow rate of between 2 and 3 seem were optimal for obtaining a uniform and thick surface coating.