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Evaluation of orientation of Cellulose nano fiber using micro-Raman spectroscopy
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Researchers used micro-Raman spectroscopy to evaluate the orientation of cellulose nanofibers (CNF) as a potential eco-friendly alternative to petroleum-derived plastic materials. The work is motivated by concerns about microplastic pollution and seeks to characterize sustainable replacement materials.
Currently, polymeric materials are used as key materials in a wide range of fields, for example chemical, industrial and medical products, etc. Most polymeric materials are petroleum-derived plastics that do not decompose in the natural environment. Recently, these marine pollution, such as microplastics, they have become an global environmental issue. Cellulose nano fiber (CNF) is attracting attention as an alternative material of petroleum-derived plastics. The mechanical and optical properties of these polymers greatly depending on their orientation, therefore it is important to evaluate their orientation. Raman spectroscopy is useful to evaluate molecular orientation of polymer materials. In this study, we evaluated Raman spectrum and the molecular orientation of various CNFs were evaluated using a polarized micro-Raman spectroscopy. In Raman spectrum some typical peaks were observed in four types of CNFs. Next, in polarization measurement, periodical change of peak intensity of some Raman shift was obtained. Therefore, it is possible to evaluate molecular orientation of CNFs using micro-Raman spectroscopy.
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