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

Quimica nova

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 themorphology, water absorption and mechanical properties of sodium alginate filmswere analyzed. The morphology of the films indicated the presence of small aggregatesin the surface of uncrosslinked films, which disappeared with the crosslinkingprocess. The water uptake and percentage of elongation increased with the additionof sorbitol in uncrosslinked films. At the same time, a decrease in tensilestrength and Young's modulus occurred. The swelling ratio and water uptake ofcrosslinked alginate/sorbitol films decreased with an increase in sorbitol contentsuggesting an enhanced crosslinking density due to the presence of plasticizer.

【 授权许可】

CC BY