摘要
Abstract
In this paper,five methods of sampling pretreatment were adopted to obtain the cross section of a commercial food-packaging composite film,and its layer structure and material compositions were analyzed by using scanning elec-tron microscopy(SEM),energy dispersive X-ray spectroscopy,and Fourier-transform infrared spectroscopy.The re-sults indicate that the composite film was composed of five layers,including a polyethylene terephthalate(PET)layer,an inorganic pigment/polyurethane(PU)adhesive/aluminum-metallized layer,a PET layer,a PU adhesive layer,and a polyethylene layer in sequence.By observing the cross sections obtained from five sampling pretreatment methods using SEM,it was found that the composite film showed a small layered cross section when sampling with the steel and dia-mond knifes of an ultra microtome or an ion milling device,exhibiting an ideal morphology with a well-defined layer struc-ture.In summary,an appropriate method can improve the successful rate greatly for obtaining an ideal film cross section.This is very significant for the quality inspection as well as the research and development of ultra-thin metal-coated multi-layer films.关键词
食品包装复合膜/扫描电子显微镜/傅里叶变换红外光谱/离子研磨装置/膜截面Key words
food-packaging composite film/scanning electron microscope/Fourier transform infrared spectroscopy/Ion grinding device/film cross section分类
化学化工
