| Full text | |
| Author(s): |
Senna, Andre M.
;
do Carmo, Janaina Braga
;
Santana da Silva, Jose Mauro
;
Botaro, Vagner R.
Total Authors: 4
|
| Document type: | Journal article |
| Source: | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 3, n. 2, p. 7-pg., 2015-06-01. |
| Abstract | |
Hydrogels were prepared from cellulose acetate with a degree substitution (DS) 2.5 dissolved in dimethylformamide using esterification crosslinking with ethylenediaminetetraacetic dianhydride (EDTAD) catalyzed by triethylamine. The carboxylic acid groups were neutralized by the addition of aqueous NaHCO3 to enhance the interaction of the hydrogel with water. The hydrogel derived from cellulose acetate and EDTAD (GEDTA) was immersed in an aqueous solution containing 47.66 g/l of KCl (2.5% K+) and 159.7 g/l of NH4H2PO4 (NH4+ 2.5% and 13.5% H2PO4-1) at room temperature for 2 h. The results of the chemical analysis showed that the product contained 120.5 +/- 1.5 mg of potassium/g, 104.3 +/- 1.1 mg of phosphate/g, and 84.0 +/- 1.5 mg of ammonium/g. The product we prepared not only has slow-release property but could also absorb a large amount of water and preserve the soil moisture at the same time. The results indicated that the GEDTA could be used in agriculture and horticulture, especially in drought-prone regions where the availability of water is limited. (C) 2015 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 09/00855-0 - Study of the thermal dynamic-mechanic behaviour of polymer based composite reinforced with vegetal fibers |
| Grantee: | Vagner Roberto Botaro |
| Support Opportunities: | Research Grants - Young Investigators Grants |