| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000309036 |
| ISSN: | 0104-6632 |
| Autores: | Waje, S.S1 Meshram, M.W Chaudhary, V Pandey, R Mahanawar, P.A Thorat, B.N |
| Instituciones: | 1University of Mumbai, Institute of Chemical Technology, Bombay, Maharashtra. India |
| Año: | 2005 |
| Periodo: | Jun |
| Volumen: | 22 |
| Número: | 2 |
| Paginación: | 209-216 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | 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 |
| Disciplinas: | Química |
| Palabras clave: | 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 |
| Texto completo: | Texto completo (Ver HTML) |
