目的 模拟日常使用情况，考察使用温度对食品接触用特氟龙不粘涂层表面特性及摩擦学性能的影响。方法 利用马弗炉，在大气环境下，对特氟龙不粘涂层在不同温度下加热处理30 min。采用扫描电子显微镜、Raman光谱仪、接触角测量仪、摩擦磨损试验机等对热处理前后涂层的结构及摩擦学性能进行测试。结果 当热处理温度低于500 ℃时，不粘涂层的表面润湿性、硬度及摩擦学性能变化不大。当热处理温度达到550 ℃时，涂层的表面结构发生明显的变化，部分涂层从底材剥落，同时观察到涂层中含氟树脂已完全分解。此时涂层的表面对去离子水和橄榄油的接触角分别为10°和12°，表现为明显的亲水和亲油性能，硬度仅为未处理涂层的1/5。涂层在干摩擦条件下及去离子水介质中，摩擦系数和磨损体积均急剧增大。 结论 使用温度对食品接触用特氟龙不粘涂层的表面结构及摩擦学行为影响较大。

The work aims to simulate daily application to investigate the effects of temperature on the surface and tribological properties of food contacting Teflon non-sticking coating. Teflon non-sticking coatings were heated in a muffle furnace for 30 mins and their surface morphology and tribological properties before and after thermal treatment were investigated with scanning electron microscope, Raman spectrometer, contact angle measuring instrument, friction and wear tester. When the thermal treatment temperature was lower than 500 ℃, the surface wettability, hardness and tribological performance of the treated coatings remained unchanged. However, when the temperature was raised to 550 ℃, the structure of the coating changed significantly. Parts of coatings were peeled off from the substrate. Moreover, the fluorine-containing polymer was totally decomposed. In this case, the contact angle of the treated coating for deionized water and olive oil reduced to 10° and 12° respectively, showing apparent hydrophilicity and lipophilicity. The hardness of the treated coating was only 1/5 of the untreated sample. At the same time, the friction coefficient and wear volume increased sharply under dry friction and in presence of deionized water. Thus, the application temperature is found to have a great influence on the surface structure and tribological behavior of the Teflon coating.