Evaluation of the types of starch for preparation of LDPE/starch blends

Brazilian Archives of Biology and Technology

Glória Maria Vinhas¹  Suzana Moreira De Lima¹  Lívia Almeida Santos¹  Maria Alice Gomes De Andrade Lima¹  Yêda Medeiros Bastos De Almeida¹ 

[1] ,Universidade Federal de Pernambuco Departamento de Engenharia Química Recife PE ,Brasil

关键词: Amylolytic enzymes;    polyethylene;    starch;    blends;    Talaromyces wortmanii;    Phanerochaete crysosporium;   

DOI  :  10.1590/S1516-89132007000300001

来源: SciELO

【 摘 要 】

This study evaluated in relation the growth, and the amylolytic activity of mixed and isolated cultures of Phanerochaete chrysosporium and Talaromyces wortmanni on different types of starch. The thermal and mechanical properties in polyethylene/starch blends (proportion: 80/20 (w/w) before and after inoculation of the mixed cultures were evaluated. The regular starch Amidex 3 and the modified starch Fox5901 stood out in relation to the cellular growth and production of the amylase enzyme. In spite of the short time that the blends were exposed to the fungi, the microorganisms promoted physical and chemical changes in the structure of the blend, modifying its thermal and mechanical properties. The alteration of the degree of crystallinity and mechanical properties of the blends could be indications of the modification caused by the biodegradation process.

【 授权许可】

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