| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000309036 |
| ISSN: | 0104-6632 |
| Authors: | Waje, S.S1 Meshram, M.W Chaudhary, V Pandey, R Mahanawar, P.A Thorat, B.N |
| Institutions: | 1University of Mumbai, Institute of Chemical Technology, Bombay, Maharashtra. India |
| Year: | 2005 |
| Season: | Jun |
| Volumen: | 22 |
| Number: | 2 |
| Pages: | 209-216 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The polymer hydrogel was synthesized by photo-polymerization process (UV light, 60 ºC) in presence of Photo-initiator (IrgacureR) and Cross-linker (NN'-methylene bisacrylamide; MBAM). In the present work, the drying of polymer hydrogel was carried out to study the effect of temperature, gel-sheet thickness, monomer ratio of acryl acid to acrylamide (AA/AM), concentration of MBAM and quantity of monomers. A correlation has been developed for modified sheet thickness as a function of contraction coefficient and degree of drying. Effective diffusivity was estimated from Fickian-diffusive model considering modified sheet thickness and was found to be in the range of 1.1 ´ 10-10-5.93 ´ 10-10 m2/s. The activation energy obtained using Arrhenius type equation was found to be in the range of 2979-10737 kJ/kmol H2O. The drying behavior shows an initial shoot-up in drying rate followed by constant rate and two falling rate periods |
| Disciplines: | Química |
| Keyword: | Química de polímeros, Gel polimérico, Secado, Coeficiente de difusión, Grosor, Coeficiente de contracción |
| Keyword: | Chemistry, Polymer chemistry, Polymer gel, Drying, Diffusion coefficient, Thickness, Contraction coefficient |
| Full text: | Texto completo (Ver HTML) |
