Correlação entre parâmetros da cinética de intumescimento com características estruturais e hidrofílicas de hidrogéis de poliacrilamida e metilcelulose

Química Nova

Fauze A. Aouada²  Edvani C. Muniz¹  Carlos M. P. Vaz¹  Luiz H. C. Mattoso¹ 

[1] ,Universidade Federal de São Carlos Departamento de Química São Carlos SP ,Brasil

关键词: hydrogels;    kinetic properties;    structural properties;   

DOI  :  10.1590/S0100-40422009000600023

来源: SciELO

【 摘 要 】

In this paper, the effects of acrylamide (AAm), methylcellulose (MC) contents, pH and ionic strength on kinetic, network and hydrophilic properties of polyacrylamide and methylcellulose hydrogels were investigated. The hydrogels were characterized by evaluating of network [average molecular weight between crosslinks (M C), crosslink density (q) and the number of elastically effective chains (Ve)], and kinetic parameters [diffusional exponent (n), diffusion constant (k) and diffusion coefficient (D)]. Such properties were controlled by adjusting of the AAm, MC contents, pH and ionic strength factors. Due to high hydrophilicity and fast water-uptake, the PAAm-MC hydrogels can be considered as materials for potential applications in agricultural fields, mainly in controlled release of water or pesticides.

【 授权许可】

CC BY-NC   
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