Study of Renewable Silica Powder Influence in the Preparation of Bioplastics from Corn and Potato Starch
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ORIGINAL PAPER
Study of Renewable Silica Powder Influence in the Preparation of Bioplastics from Corn and Potato Starch Luciana C. de Azêvedo1,2 · Suzimara Rovani2 · Jonnatan J. Santos3 · Djalma B. Dias2 · Sandi S. Nascimento1 · Fábio F. Oliveira4 · Leonardo G. A. Silva2 · Denise A. Fungaro2 Accepted: 29 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In the present study, 0.5–1.5% silica powder, from sugarcane waste ash, was incorporated into corn and potato starch bioplastics doped with sodium silicate solution to improve the properties of elongation at break and increase the thermal resistance of the bioplastics. The starch-based bioplastics were produced by casting and characterized by color analyses, transparency, opacity apparent, humidity, thickness, tensile strength, elongation at break, FTIR, DSC, SEM, and biodegradation assay. The addition of 0.5% of silica powder improved the elongation at break of the corn starch-based bioplastics. The sample CS5-P0.5 presented the highest percentage of elongation at the break among the studied samples, increased from 59.2% (without silica powder) to 78.9% (with silica powder). For potato starch bioplastic the addition of 0.5% of silica powder did not improve elongation at break but increased the thermal resistance. Increased until 17 °C for PS5-P0.5 sample and until 11 °C for PS7.5-P0.5 sample. The bioplastics of potato starch were biodegraded in 5 days, and those of corn starch took almost 40 days. Silica powder inhibited the growth of fungi in starch bioplastics.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10924-020-01911-8) contains supplementary material, which is available to authorized users. * Luciana C. de Azêvedo luciana.cavalcanti@ifsertao‑pe.edu.br * Suzimara Rovani [email protected]; [email protected] 1
Department of Food Technology, Federal Institute IF SERTAO-PE, BR 407, Km 08, Jardim São Paulo, Petrolina, PE CEP: 56314‑520, Brazil
2
Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Avenida Professor Lineu Prestes, 2242, Cidade Universitária, São Paulo, SP CEP: 05508‑000, Brazil
3
Instituto de Química, Universidade de São Paulo, Avenida Professor Lineu Prestes, 748, Cidade Universitária, São Paulo, SP CEP: 05508‑000, Brazil
4
Departamento de Ciências Agrárias/Solos, Federal Institute - IF SERTAO-PE, BR 235, Km 22, Zona Rural, Petrolina, PE CEP: 56302‑970, Brazil
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Vol.:(0123456789)
Journal of Polymers and the Environment
Graphic Abstract
Keywords Bioplastics · Sugarcane waste ash · Corn starch · Potato starch · Silica
Introduction Scientists around the world are studying the impacts of oilderived plastics on planet Earth. Some studies say that if nothing is done in 2050, there will be more plastics than fish in the oceans. But not only the life in oceans is affected, but birds are also dying from eating plastics by mistake. Changes in the plastics manufacturing and use process need urgently to be revi
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