Electrically conductive bioplastics from cassava starch

Abstract

No presente trabalho, biofilmes condutores foram sintetizados através de soluções de 100 mL de água com 3 g de amido de mandioca (Manihot esculenta Crantz) e quantidades diferentes de glicerina, glutaraldeído, polietilenoglicol e perclorato de lítio. Estes filmes foram caracterizados por espectroscopia de impedância eletroquímica (EIS), microscopia eletrônica de varredura (SEM), espectrometria de reflexão total atenuada no infravermelho com transforma de Fourier (ATR-FTIR), termogravimetria (TG). Os resultados mostraram que os biofilmes com quantidades mais elevadas de perclorato de lítio possuem valores maiores de condutividade e as diferenças morfológica e molecular foram observadas como sendo um resultado das proporções adicionadas dos compostos em cada uma das rotas de preparação.In the current work, conductor biofilms were synthesized by means of solutions of 100 mL of water with 3 g of starch from cassava (Manihot esculenta Crantz) and different amounts of glycerin, glutaraldehyde, polyethyleneglycol and lithium perchlorate. These biofilms were characterized through electrochemical impedance spectroscopy (EIS), scanning electronic microscopy (SEM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and thermogravimetry (TG). Results showed that biofilms with higher amount of lithium perchlorate portray higher values of conductivity and morphological and molecular differences could be observed as a result of the added proportions of the compounds in each one of the trials.

The Effect of pH on the Preparation of Electrically Conductive and Physically Stable PANI/Sago Blend Film via in situ Polymerization

“…The diameter of the produced films was 4-5 cm, as shown in Figure 1. The other desirable features in film such as consistency, physical homogeneity, and flexibility were tested by visual inspection of the samples and performed 7 days after the making of the films which is the estimated amount of time for solvent total removal and therefore the sample is considered to be stable (Arrieta et al, 2011). As shown in Figure 1, blends P/S 2 and P/S 4 were found to be very brittle with spongy properties, due to the degradation of starch.…”

Películas Conductoras De Almidón De Yuca (Cassava) Como Material Para Un Acumulador Electroquímico De Carga (Batería)

“…Es común utilizar el almidón en la elaboración de biopelículas para empaques comestibles, pero han surgido también investigaciones encaminadas hacia el desarrollo y estudio de las propiedades conductoras que este material puede llegar a adquirir 3,4 . Los estudios que se han hecho como biopolímero conductor (conductor iónico sólido) han atraído la atención porque se obtienen propiedades eléctricas y mecánicas favorables para su utilización como material conductor y semiconductor y además, porque el almidón es un polímero natural, abundante, renovable, económico y biodegradable 5 .…”

Thermal and Electrochemical Properties of Solid Biopolymer Electrolytes From Starch of Different Botanical Origin

“…Recent research has established that polysaccharides such as starch found in plants can be used to produce biopolymers. This polysaccharide can be modified through a plasticization and doping process to obtain films with high ionic conductivity (Arrieta et al, 2011;Singh et al, 2014). Electrolytes based on plasticized cassava starch and lithium salt contents have been proposed as solid biopolymer electrolytes and tested in applications such as artificial muscles and electrochemical accumulators (Nuñez et al, 2016;Arrieta et al, 2011;Acosta et al, 2015).…”

“…This polysaccharide can be modified through a plasticization and doping process to obtain films with high ionic conductivity (Arrieta et al, 2011;Singh et al, 2014). Electrolytes based on plasticized cassava starch and lithium salt contents have been proposed as solid biopolymer electrolytes and tested in applications such as artificial muscles and electrochemical accumulators (Nuñez et al, 2016;Arrieta et al, 2011;Acosta et al, 2015). The starch synthesized in plants is made up of two types of polymers: amylopectin and amylose.…”