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http://nopr.niscpr.res.in/handle/123456789/32547| Title: | Preparation and characterization of carboxymethyl cellulose from jute wastes |
| Authors: | Ragheb, A El-Thalouth, I Abd Elsayed, H Hebeish, A |
| Keywords: | Apparent viscosity;Carboxymethyl cellulose;Jute waste fibre |
| Issue Date: | Dec-1991 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Jute waste fibres have been used as the starting material for the preparation of carboxymethyl cellulose (CMC) and the dependence of the properties of CMC on the purity of starting material as well as on the concentration of etherifying agents has been investigated. It is observed that the degree of substitution (DS) of CMC increases with the increase in the degree of purity of the starting cellulosic material; it follows the order: ɑ-cellulose > holocellulose > dewaxed and pectin-free jute > dewaxed jute. DS also increases with increase in the concentration of etherifying agents (monochloroacetic acid and sodium hydroxide). On the other hand, the solubility of CMC is governed not only by DS and the purity of the starting material but also by the concentration of the etherifying agents used. It is further observed that the rheological properties of CMC are characterized by non-Newtonian pseudoplastic behaviour, with the exception of very few samples which exhibit thixotropic behaviour. The purity of the starting material as well as the DS of CMC determine the rheological properties. The measuring temperature as well as storing of the CMC pastes before commencing the measurements have no significant effect on the rheological properties. The apparent viscosity has been found to be dependent on the degree of purity of the cellulosic samples, DS and duration of storing before measurement. |
| Page(s): | 263-269 |
| ISSN: | 0975-1025 (Online); 0971-0426 (Print) |
| Appears in Collections: | IJFTR Vol.16(4) [December 1991] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJFTR 16(4) 263-269.pdf | 1.68 MB | Adobe PDF | View/Open |
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