Adhesive-free adhesion between polytetrafluoroethylene (PTFE) and isobutylene-isoprene rubber (IIR) via heat-assisted plasma treatment
Adhesive-free adhesion between polytetrafluoroethylene (PTFE) and isobutylene-isoprene rubber (IIR) via heat-assisted plasma treatment
复制标题
DOI：
10.1039/c6ra27642c
复制
发表时间：
2017-01-01
期刊：
影响因子：
3.9
通讯作者：
Yamamura, Y.
中科院分区：
文献类型：
--
作者：
Ohkubo, Y.;Ishihara, K.;Yamamura, Y.
采用常压等离子体加热处理（热辅助等离子体处理）对聚四氟乙烯（PTFE）表面进行改性，以促进其与异丁烯-异戊二烯橡胶（IIR）的直接粘合，而无需任何粘合剂。等离子体处理的PTFE和未硫化的IIR进行热压缩，并通过T-剥离试验评价它们的粘合强度。在IIR失效之前，在250摄氏度以上进行的热辅助等离子体处理使粘附强度大幅增加超过2.0 N mm（-1）。等离子体处理的PTFE表面进行了评估，使用X射线光电子能谱，纳米压痕和扫描电子显微镜。这些分析的结果表明，粘合强度急剧增加，因为热辅助等离子体处理促进了碳-碳交联的形成和/或PTFE表面上的弱边界层（WBL）的蚀刻。这导致PTFE中的WBL的恢复，这导致防止WBL中的PTFE层间剥离。此外，表面改性的估计寿命令人惊讶地超过一年。
A polytetrafluoroethylene (PTFE) surface was modified using atmospheric pressure plasma treatment under heating (heat-assisted plasma treatment) to promote its direct adhesion to isobutylene-isoprene rubber (IIR) without any adhesives. Plasma-treated PTFE and unvulcanised IIR were thermally compressed and their adhesion strength was evaluated via a T-peel test. Heat-assisted plasma treatments conducted above 250 degrees C drastically increased the adhesion strength over 2.0 N mm(-1) before IIR failure. The plasma-treated PTFE surface was evaluated using X-ray photoelectron spectroscopy, nanoindentation and scanning electron microscopy. The results of these analyses indicated that the adhesion strength drastically increased because heat-assisted plasma treatment promoted the formation of carbon-carbon crosslinks and/or etching of a weak boundary layer (WBL) on the PTFE surface. This led to the recovery of the WBL in PTFE, which resulted in the prevention of PTFE inter-layer peeling in the WBL. In addition, the estimated lifetime of the surface modification surprisingly exceeded one year.