制浆造纸学科的扫描电镜样品制备及成像探讨

Discussion on SEM Sample Preparation and Imaging Techniques in Pulp and Paper Discipline

中文关键词:  扫描电镜  制浆造纸  样品制备  荷电效应

Key Words:SEM  pulp and papermaking  sample preparation  charging effect

中文摘要:

      介绍了制浆造纸学科常见样品如纸张、纸浆、粉末（造纸填料及助剂等）、膜等样品的扫描电镜（SEM）制样技术，并探讨了SEM成像过程中的常见问题。结果表明，采用粘贴碳导电胶条、使用银导电胶液等方法可增加样品表面的导电性；对于横截面样品，利用离子束切割技术可以有效避免机械切割引起的样品形变；通过优化镀膜时间、加速电压等扫描电镜参数可显著改善由荷电效应、边缘效应及电子束损伤等引起的SEM图像异常。

Abstract:

      Scanning election microscopy （SEM） preparation techniques for samples such as paper， pulp， powder （filler and auxiliaries） and film were introduced. The common problems in SEM experiment were also discussed. The authors suggested using carbon conductive adhesive tape， silver liquid conductive adhesive to enhance the conductivity of the sample surface. As for the sample of fiber cross-section， using ion beam cutting technology could effectively avoid sample deformation caused by mechanical cutting. Optimizing coating time and accelera-ting voltage could significantly avoid the imaging problems caused by charging effect， edge effect， and electron beam damage.