Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/5200
Título: | Transport of non-associated electrolytes in acrylamide hydrogels | Autor: | Lobo, V. M. M. Valente, A. J. M. Polishchuk, A. Ya. Geuskens, G. |
Data: | 2001 | Citação: | Journal of Molecular Liquids. 94:3 (2001) 179-192 | Resumo: | Diffusion of non-associated electrolytes (LiCl and KCl) in different hydrogels has been studied to identify the mechanism of electrolyte interaction with the structure of hydrogels and its dependence on electrolyte concentration and thermodynamic features of the electrolyte. Hydrogel membranes have been prepared from acrylamide (AAm) using N,N'-methylene-bis-acrylamide (MBAAm) as the cross-linker. Properties of membranes have been altered varying the content of cross-linker. Properties of membranes have been altered varying the content of cross-linker. Integral diffusion coefficients of potassium chloride and lithium chloride in the hydrogel membranes ave been compared with mutual diffusion coefficients of those electrolytes in aqueous solutions. The study of electrolyte diffusion was supported by data on water solubility in hydrogels (degree of swelling, and sorption and desorption isotherms) showing dependence of electrolyte diffusion coefficient on water content inside polymer matrix. Thermodynamic study showed irreversible character of the sorption of solutes, probably due to acidic hydrolysis of amide groups of gels. The main features, which characterise properties of aqueous solution of strong electrolytes, remain in polymer matrix thus defining diffusion coefficients and other parameters representative of electrolyte transport in polyacrylamide hydrogels. | URI: | https://hdl.handle.net/10316/5200 | DOI: | 10.1016/S0167-7322(01)00267-7 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Química - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
file2892f22b5cae4f4a89117c1fd218fca0.pdf | 1.64 MB | Adobe PDF | Ver/Abrir |
Citações SCOPUSTM
25
Visto em 14/out/2024
Citações WEB OF SCIENCETM
24
Visto em 2/out/2024
Visualizações de página 50
472
Visto em 15/out/2024
Downloads
318
Visto em 15/out/2024
Google ScholarTM
Verificar
Altmetric
Altmetric
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.