Computer-assisted quantification of the multi-scale structure of films made of nanofibrillated cellulose
Computer-assisted quantification of the multi-scale structure of films made of nanofibrillated cellulose
复制标题
DOI：
10.1007/s11051-009-9710-2
复制
发表时间：
2010-03
影响因子：
2.5
通讯作者：
G. Chinga-Carrasco;K. Syverud
中科院分区：
文献类型：
--
作者：
G. Chinga-Carrasco;K. Syverud
由纳米原纤化纤维素（NFC）制成的膜对于用于包装应用是最令人感兴趣的。然而，为了了解NFC的成膜能力及其特性，需要新的先进方法来表征不同尺度的结构。在这项研究中，我们进行了全面的表征NFC薄膜，基于台式扫描仪分析，扫描电子显微镜在背散射电子成像模式（SEM-BEI），激光轮廓仪（LP）和场发射扫描电子显微镜在二次电子成像模式（FE-SEM-SEI）。基于计算机辅助电子显微镜，进行客观定量以评估（i）膜厚度、（ii）原纤维直径和（iii）原纤维取向。最常见的原纤维直径为20-30 nm。介绍了一种获取无导电金属层NFC表面FE-SEM图像的方法。在适当的表征工具下，量化了膜在水分下的结构和机械性能。
Films made of nanofibrillated cellulose (NFC) are most interesting for use in packaging applications. However, in order to understand the film-forming capabilities of NFC and their properties, new advanced methods for characterizing the different scales of the structures are necessary. In this study, we perform a comprehensive characterisation of NFC-films, based on desktop scanner analysis, scanning electron microscopy in backscatter electron imaging mode (SEM-BEI), laser profilometry (LP) and field-emission scanning electron microscopy in secondary electron imaging mode (FE-SEM-SEI). Objective quantification is performed for assessing the (i) film thicknesses, (ii) fibril diameters and (iii) fibril orientations, based on computer-assisted electron microscopy. The most frequent fibril diameter is 20–30 nm in diameter. A method for acquiring FE-SEM images of NFC surfaces without a conductive metallic layer is introduced. Having appropriate characterisation tools, the structural and mechanical properties of the films upon moisture were quantified.