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Rheological and structural characterization of cassava starches foam with low and high amylose contents

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Abstract

Short life cycle containers have contributed greatly to the increase in polymer consumption. Expanded polystyrene (EPS) is a widely used material in disposable packaging, however, its residue occupies a large volume and is difficult to degrade. Starch is a natural and biodegradable polysaccharide that can be a substitute for EPS. In this sense, the objective of this study was to analyze the influence of amylose content on the properties of expanded cassava starch plates. The starches of different sources presented different amylose contents. The starches of different source presented small differences amylose contents (~3 %), however, there were differences in the rheological behavior of mixtures with water and glycerol. Plates were molded by thermal expansion. Results shown that expanded plates produced with the starch of lower amylose content presented a density lower than the other foam, its Peleg’s K2 constant showed lowest hygroscopicity confirmed by its high contact angle at 3 min, and the impact strength was 54 % higher than the foam of higher amylose content.

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Acknowledgements

The authors thank the National Council for Scientific and Technological Development (CNPQ), the Laboratory of Polymeric Materials (LAPOL), the post graduated program of Materials Engineering (PPGEM) and the Federal University of Rio Grande do Sul (UFRGS) for the support.

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Authors and Affiliations

  1. Polymeric Materials Laboratory, Materials Engineering Department, Federal University of Rio Grande do Sul, Bento Gonçalves Ave, P.O. Box 15090, 9500, 91501-970, Porto Alegre, ZC, RS, Brazil

    Camila da Silva Figueiró, Maria Rachel Trojaner & Ruth Marlene Campomanes Santana

  2. Instituto Federal de Educação, ciência e tecnologia Sul-rio-grandense, Av. Copacabana, 100, Bairro Piratini, 93216-120, Sapucaia do Sul/RS, Brazil

    Carmen Iara Walter Calcagno

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  1. Camila da Silva Figueiró
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  2. Maria Rachel Trojaner
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  3. Carmen Iara Walter Calcagno
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  4. Ruth Marlene Campomanes Santana
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Correspondence to Camila da Silva Figueiró.

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da Silva Figueiró, C., Trojaner, M.R., Calcagno, C.I.W. et al. Rheological and structural characterization of cassava starches foam with low and high amylose contents. J Polym Res 29, 30 (2022). https://doi.org/10.1007/s10965-021-02782-w

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