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Distribution of α-Cellulose, Hemicelluloses and Acid Insoluble Lignin During Total Chlorine Free Bleaching of AS/AQ Wheat Straw Pulp
journal contribution
posted on 2023-05-17, 11:03 authored by Yaqoob, N, Karen Stack, Rehman, IU, Cheema, KJ, Hameed, SR, Mateen, BThe effect of each individual bleaching stage on the percentage composition of a-cellulose, acid insoluble lignin and hemicelluloses in multistage total chlorine free bleaching of alkaline sulphate/anthraquinone (AS/AQ) wheat straw pulp was studied by using standard TAPPI and GC methods, respectively. With AOOxP bleaching, > 85 % of pulp fibers were calculated to be composed of true cellulosic fibers, while acid insoluble lignin (%) contents decreased to as low as < 2.0 % as compared to an unbleached sample where pulp fiber constitutes 76.6 % a-cellulose and 7.6 % acid insoluble lignin. A statistical correlation was established and it was found that hemicelluloses are also responsible for ageing of pulp. Burst and tensile index were also found to be effected by changes in hemicelluloses (%) in pulp structure.
History
Publication title
Asian Journal of ChemistryVolume
23Issue
7Pagination
3050-3054ISSN
0970-7077Department/School
School of Natural SciencesPublisher
Mrs Pushpa AgarwalPlace of publication
11/100 Rajendra Nagar, Sector 3, Sahibabad, India, Ghaziabad, 201 005Rights statement
Copyright 2011 Asian Journal of ChemistryRepository Status
- Restricted