PTFE表面辐照改性研究进展

聚四氟乙烯(PTFE)是一种具有润滑、绝缘及化学惰性的工程塑料,被广泛地用于电子、化工、纺织、医疗、机械、环境等领域。由于C—F键能高以及氟原子规整地排列在C—C链骨架上,因此PTFE表面能极低且表面润湿性和粘结性差,需要进行表面改性以增强PTFE与其它材料的界面亲和性。通过伽马射线/电子束和低温等离子体对PTFE进行辐照接枝改性和功能化修饰,能够有效地改善和优化其表面性能,使PTFE材料得到更好的利用。低温等离子体技术尤其适合PTFE表面改性处理,因为它不会导致PTFE本体材料的降解。本文综述了国内外关于PTFE表面辐照改性及应用的研究进展。

Research Progress on Radiation-Induced Surface Modification of PTFE

Polytetrafluoroethylene (PTFE) is a kind of engineering plastics possessing lubricating, insulating and chemically inert properties, which is widely employed in electronics, chemical industry, textile, medicine, mechanical engineering, environmental preservation. Low surface energy, poor adhesion to other materials and high hydrophobicity of the surface of PTFE result from the high bond energy of C-F and fluorine atoms arranging neatly on the surface of C-C chains, which substantially limit its application and should be overcome in order to improve its interfacial affinity to other materials via surface modification. Gamma-ray/electron beam and low temperature plasma radiation-induced surface modification and functionalization of PTFE can efficiently ameliorate its surface adhesion property or compatibility. Compared with high energy radiation method, low temperature plasma irradiation technology is more suitable for the surface modification of PTFE since it does not cause chain scission of bulk PTFE. This review highlights some recent contributions to the surface modification of PTFE via radiation technology.