塑料薄膜基上镀纳米SiOx涂层的表征及性能研究

本文利用等离子体气相化学沉积(PECVD)的方法,在聚对苯二甲酸乙二醇酯(PET)和双向拉伸聚丙烯(BOPP)薄膜上制备了纳米厚度的SiOx涂层。使用傅里叶变换红外光谱(FTIR)、原子力显微镜(AFM)和超声原子力显微镜(UAFM)对纳米厚度的SiOx薄膜进行表征。利用AFM和UAFM,可以得到SiOx薄膜的形貌和超声幅值成像。尤其是本文使用的新方法UAFM,可以表征表面和次表面缺陷。同时,本文实验研究了,镀SiOx的PET和BOPP薄膜的拉伸性能、接触角和阻隔性。结果表明,SiOx涂层提高了塑料薄膜的阻隔性、拉伸性能。     

Plasma Modified Polypropylene Membranes as the Lithium-Ion Battery Separators

To reduce the thermal shrinkage of the polymeric separators and improve the safety of the Li-ion batteries,plasma treatment and plasma enhanced vapor chemical deposition（PECVD）of SiO_x-like are carried out on polypropylene（PP）separators,respectively.Critical parameters for separator properties,such as the thermal shrinkage rate,porosity,wettability,and mechanical strength,are evaluated on the plasma treated PP membranes.O₂ plasma treatment is found to remarkably improve the wettability,porosity and electrolyte uptake.PECVD SiO_x-like coatings are found to be able to effectively reduce the thermal shrinkage rate of the membranes and increase the ionic conductivity.The electrolyte-philicity of the Si Ox-like coating surface can be tuned by the varying O₂ content in the gas mixture during the deposition.Though still acceptable,the mechanical strength is reduced after PECVD,which is due to the plasma etching.     

将静电喷雾沉积技术应用于轮转印刷

目前,导电涂层已广泛应用于工业领域.如采用溅射技术在LCD或OLED平板加工过程中涂布ITO层,以及在电子印刷器件基材表面制备基极层.然而,传统涂布工艺(电子束溅射、旋转涂布等)在工业生产中存在一些问题:这些工艺不仅成本高,而且需要真空等苛刻的生产环境.近年来,研究人员已经提出用各种印刷工艺来替代传统的涂布工艺.本文提出将静电喷雾沉积(ESD)印刷工艺应用于ITO涂层和导电涂层的制备.此外,为了更好地应用静电喷雾沉积工艺,本文也研究了喷嘴和外加电压对不同类型喷头的影响.