[article] 
inIndustrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 10918–10927

Titre :	Reversible swelling / deswelling characteristics of ethylene glycol dimethacrylate cross - linked poly (acrylic acid - co - sodium acrylate - co - acrylamide) superabsorbents
Type de document :	texte imprimé
Auteurs :	Neelesh Bharti Shukla, Auteur ; Giridhar Madras, Auteur
Année de publication :	2011
Article en page(s) :	pp. 10918–10927
Note générale :	Chimie industrielle
Langues :	Anglais (eng)
Mots-clés :	Superabsorbent polymers
Résumé :	Poly(acrylic acid-co-sodium acrylate-co-acrylamide) superabsorbent polymers (SAPs) cross-linked with ethylene glycol dimethacrylate (EGDMA) were synthesized by inverse suspension polymerization. The SAPs were swollen in DI water, and it was found that the equilibrium swelling capacities varied with the acrylamide content. The SAPs were subjected to reversible swelling/deswelling cycles in DI water and aqueous NaCl solution, respectively. The effect of the addition of an electrolyte on the swelling of the SAP was explored. The equilibrium swelling capacity of the SAPs was found to decrease with increasing concentration of added electrolyte in the swelling medium. The effect of the particle size of the dry SAPs on the swelling properties was also investigated. A first order model was used to describe the kinetics of swelling/deswelling, and the equilibrium swelling capacity, limiting swelling capacity, and swelling/deswelling rate coefficients were determined.
DEWEY :	660
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie200713y

[article] Reversible swelling / deswelling characteristics of ethylene glycol dimethacrylate cross - linked poly (acrylic acid - co - sodium acrylate - co - acrylamide) superabsorbents [texte imprimé] / Neelesh Bharti Shukla, Auteur ; Giridhar Madras, Auteur . - 2011 . - pp. 10918–10927.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 10918–10927

Mots-clés :	Superabsorbent polymers
Résumé :	Poly(acrylic acid-co-sodium acrylate-co-acrylamide) superabsorbent polymers (SAPs) cross-linked with ethylene glycol dimethacrylate (EGDMA) were synthesized by inverse suspension polymerization. The SAPs were swollen in DI water, and it was found that the equilibrium swelling capacities varied with the acrylamide content. The SAPs were subjected to reversible swelling/deswelling cycles in DI water and aqueous NaCl solution, respectively. The effect of the addition of an electrolyte on the swelling of the SAP was explored. The equilibrium swelling capacity of the SAPs was found to decrease with increasing concentration of added electrolyte in the swelling medium. The effect of the particle size of the dry SAPs on the swelling properties was also investigated. A first order model was used to describe the kinetics of swelling/deswelling, and the equilibrium swelling capacity, limiting swelling capacity, and swelling/deswelling rate coefficients were determined.
DEWEY :	660
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie200713y