Influence of plasticizer addition and crosslinking process on morohology, water absoption and mechanical properties of sodium alginate films

Química Nova

Soldi, Valdir¹  Andreani, Larissa¹  Lima, Aline Margarete Furuyama¹  Borsali, Redouane¹ 

关键词: sodium alginate;    sorbitol;    formaldehyde.;   

DOI  :  10.1590/S0100-40422007000400014

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The effects of sorbitol and formaldehyde on the morphology, water absorption and mechanical properties of sodium alginate films were analyzed. The morphology of the films indicated the presence of small aggregates in the surface of uncrosslinked films, which disappeared with the crosslinking process. The water uptake and percentage of elongation increased with the addition of sorbitol in uncrosslinked films. At the same time, a decrease in tensile strength and Young's modulus occurred. The swelling ratio and water uptake of crosslinked alginate/sorbitol films decreased with an increase in sorbitol content suggesting an enhanced crosslinking density due to the presence of plasticizer.

【 授权许可】

Unknown