INVESTIGATION OF WATER ABSORPTION BY CELLULOSE COMPOSITE
UDK 676.252.2
Abstract
The conducted studies of the effect of composite fiber composition on water absorption confirmed the fact of a possible solution to the problem of improving the quality of both the cellulose base and the puff cellulose obtained from it - the core layer of disposable water-absorbing sanitary and hygienic products (SGI) based on compositions of cellulose–containing materials. Data on the effectiveness of the combination of coniferous and deciduous wood pulp and cellulose of special chemical treatment (CSR) have been obtained. Compared to cellulose, the main indicator in the CSO – the "Weighted average fiber length" for the CSO turned out to be almost 2 times lower. The width of the fiber has decreased, the bending of the fiber has decreased 2 times, the twisting of the fiber has increased 3 times and the area of the trifle has increased almost 3 times. Such profound changes in cellulose, as expected, affected the quality of the cellulose base. Fiber compositions for casting cellulose material samples were studied: cellulose – 100%; cellulose – 75% + CSO – 25%; cellulose – 50% + CSO – 50%; CSO – 100%. For comparison, an experiment was conducted with cotton, from which the best puff cellulose is obtained. In essence, a cotton product is taken as a standard of quality. The compositions were studied: cellulose – 75% + cotton – 25%; cellulose – 50% + cotton – 50%; cotton – 100%.
The combination of cellulose and CSF in various proportions – from 25 to 50%, allowed us to obtain samples of cellulose base material with high water absorption properties - by 22%, with an increase in water retention by 3-5%. When comparing the quality indicators of the pulp base and cotton, it was revealed that the cellulose material consisting of cellulose – 50% + CSO – 50% is comparable or somewhat higher than the quality of the cotton puff pulp. Research has generally shown the prospects for the development of puff pulp based on various cellulose-containing materials to create competitive materials and fulfill the task of developing and import substitution of puff pulp in the Russian Federation.
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