Download Cellulosic Pulps, Fibres and Materials: Cellucon ’98 by John F Kennedy, Glyn O Phillips, Peter A Williams PDF

By John F Kennedy, Glyn O Phillips, Peter A Williams

A complete review of analysis undertaken in all facets of cellulosic pulps, fibres and fabrics together with the construction and processing of pulp and paper fibre.

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Extra info for Cellulosic Pulps, Fibres and Materials: Cellucon ’98 Proceedings

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We chose the starting cellulose materials to represent variations in the proportion of cellulose Ia and Ip, microfibril size and state of order. We used algal ccllulose, bacterial cellulosc, cotton linters and birch kraft pulp. Further, we varied the state of order of the starting materials by ball milling. Thc starting materials and ball-milled starting materials were all mercerised and regenerated. We recordcd 13C-CPAVIAS-NMR-spectraon all samples and evaluated the spectra with chemometrics. EXPERIMENTAL Starting materials The cotton linters and bleached birch kraft pulp wcre commercially available samples.

26 New sources, structure and properties of cellulose Oligosaccharide analysis using anion exchange high performance liquid chromatography - method 2 The method used for the analysis of the oligosaccharide component of the strong trifluoroacetic acid hydrolysate and the enzyme hydrolysates was similar to method 1. The only difference was that the concentration of sodium acetate was increased, linearly, to 400 mh4 over 60 min. Methylation analysis The water insoluble polysaccharide was methylated by three cycles according to method described by Isogai et al.

EXPERIMENTAL Starting materials The cotton linters and bleached birch kraft pulp wcre commercially available samples. Bacterial cellulose was generated from commercial Nata de COCO,by boiling in 1 % NaOH for 2 days, then washing with deionised water. 25 M HC1 for 3 days, then washed with deionised watcr. 015 ml acetic aced per gram Cfudophorufor 18 h. The chlorite treatment was repeatcd 3 times. 1 M NaOH for 2 h, and washed. Mercerisation The samples were immersed in 16 % NaOH and kept at -18 "C for at least 18 h.

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