期刊
VIBRATIONAL SPECTROSCOPY
卷 40, 期 2, 页码 177-183出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.vibspec.2005.08.004
关键词
beta-alkoxy elimination; FTIR crystallinity index; oxycellulose; X-ray analysis
Cellulose paper (Whatman no. 1, chromatographic grade) was oxidised with 0. 1 M sodium metaperiodate at different oxidation levels (0- 11 days at room temperature), and analysed with FTIR before and after chemical treatments (reduction, further oxidation, alkaline hydrolysis). The deconvolution of infrared data allowed us to verify that periodate oxidises cellulose in isolated domains, leading to the decrease of crystallinity, in agreement with the results of wide angle X-ray scattering (WAXS). In particular, the alkaline hydrolysis (beta-alkoxy fragmentation) followed by mild acid treatment removed the oxidised groups and recovered most of the crystallinity of cellulose, as determined by the FTIR crystallinity index. (c) 2005 Elsevier B.V. All rights reserved.
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