Adhesion of calcium phosphate ceramic on polyethylene (PE) and polytetrafluoroethylene (PTFE)
Adhesion of calcium phosphate ceramic on polyethylene (PE) and polytetrafluoroethylene (PTFE)
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DOI：
10.1016/j.surfcoat.2003.10.013
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发表时间：
2004-06-22
影响因子：
5.4
通讯作者：
Jansen, JA
中科院分区：
文献类型：
--
作者：
Feddes, B;Wolke, JGC;Jansen, JA
磷酸钙（CaP）陶瓷涂层因其具有骨诱导性而常用于生物医学植入物。在这项工作中，r.f.通过拉伸和界面拉伸试验研究了磁控溅射沉积CaP陶瓷在PE和PTFE上的性能。使用未处理的和氧等离子体预处理的基材。发现CaP对PE的粘附性良好。在拉伸试验中，使用环氧树脂粘合剂将涂覆的材料粘合到拉杆上。通常，环氧树脂而不是CaP-PE界面失效。此外，CaP涂层PE的界面平面可以扩展到其正常尺寸的两倍，而涂层不分层。未处理和血浆预处理的材料之间没有发现显著差异。进行额外的实验以阐明什么机制是CaP对PE的良好粘附的原因。良好的附着力是源自溅射靶的高能氧离子轰击的结果。不存在这种轰击导致聚合物和涂层之间的化学键数量减少，因此导致涂层分层。PTFE表现出不同的行为。拉伸试验中的失效部位在PTFE内。无论是否给予血浆预处理，均未发现显著差异。紫外线引起的PTFE损坏是内聚失效的最可能原因。UV光从等离子体发射并通过CaP涂层透射。(C)2003 Elsevier B. V.保留所有权利。
Calcium phosphate (CaP) ceramic coatings are often used on biomedical implants for its osteoinductive properties. In this work, the adhesion of r.f. magnetron sputter deposited CaP ceramic on PE and PTFE was studied by tensile and interface elongation tests. Both untreated and oxygen plasma pretreated substrates were used. The adhesion of CaP to PE was found to be good. In tensile tests, the coated material was glued to the pull rods using an epoxy adhesive. Usually, the epoxy failed instead of the CaP-PE interface. Moreover, the interfacial plane of the CaP coated PE could be extended to twice its normal size without the delamination of the coating. No significant difference was found between the untreated and plasma pretreated material. Additional experiments were performed to clarify what mechanism is responsible for the good adhesion of CaP to PE. Good adhesion is the result of a bombardment by energetic oxygen ions that originate from the sputtering target. The absence of this bombardment causes a lower number of chemical bonds between the polymer and the coating, and therefore the delamination of the coating. The PTFE showed a different behavior. The locus of failure in the tensile tests was within the PTFE. No significant difference was found whether or not a plasma pre-treatment was given. UV light induced damage of the PTFE is the most likely reason for the cohesive failure. The UV light is emitted from the plasma and is transmitted by the CaP coating. (C) 2003 Elsevier B.V. All rights reserved.