The structure of different cellulosic fibres characterized by Raman spectroscopy |
| |
| Affiliation: | 1. Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil;2. Museu de Arte Murilo Mendes, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil;3. Setor de Caracterização Tecnológica, Centro de Tecnologia Mineral, 21941-901 Rio de Janeiro, RJ, Brazil;4. Centre for Astrobiology and Extremophile Research, Department of Chemical & Forensic Sciences, School of Life Sciences, University of Bradford, BD7 1DP Bradford, United Kingdom;1. Chemistry Department – Institute of Exact Science (ICE), Federal University of Juiz de Fora (UFJF), Juiz de Fora, MG 36036-330, Brazil;2. Chemistry Department – Institute of Exact Science (ICEx), Federal University of Minas Gerais (UFMG), Belo Horizonte, MG 31270-901, Brazil;1. Instituto Federal de Educação, Ciência e Tecnologia do Sudeste de Minas Gerais, Campus São João Del Rei, São João Del Rei, MG, Brazil;2. Laboratório de Espectroscopia de Materiais, Dep. de Física, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil;3. Laboratório de Tecnologia em Materiais Fotônicos e Optoeletrônicos, Faculdade de Tecnologia de São Paulo, CEETEPS/UNESP, 01124-060 São Paulo, SP, Brazil;1. Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748 - Butantã, 05508-000 São Paulo, SP, Brazil;2. Dept. of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK;3. Centre for Astrobiology and Extremophiles Research, Faculty of Life Sciences, University of Bradford, Bradford BD7 1DP, UK |
| |
| Abstract: | Different samples of cellulosic materials were analyzed by Raman spectroscopy and wood chips from Pinus elliottii, treated with acidic and alkaline aqueous solutions, were used to evaluate diagnostic signatures of the chemical structure of the cellulosic fibres. Cotton and whiskers synthesized from cotton, ancient Egyptian linen from a mummy wrapping, and five different paper sheets used in museum handling were compared. The complementarity of the Raman spectroscopic and scanning electron microscopic data facilitated the evaluation of the crystallinity, the level of organization and chain sizes of the fibres and the identification of different oxidation products. Intensity ratios measured from pairs of key bands were used to characterize the crystallinity, chain lengths and presence of oxidative decomposition in the range of the studied samples. Finally, the Raman spectra of the ancient Egyptian linen specimen indicated a potential future application of the proposed analysis for the characterization of archaeological pieces composed of linen. |
| |
| Keywords: | Vibrational assignment Fluorescence FT-Raman Near-infrared excitation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
