Electrochemical Study of Cassava Starch Conductive Biopolymers  Synthesized at Different pH

Alvaro, A. Arrieta; Miguel, Edwar; Palencia, Manuel

doi:10.19026/ajfst.14.5887

Cited by 2 publications

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“…The solutions were heated to 70 • C using constant stirring for 15 min. After the heating process, the solutions were poured into Teflon Petri dishes, which were placed in an oven for 48 h at a temperature of 70 • C. The films formed were left undisturbed for 24 h at room temperature [30,31]. Each of the films was prepared in triplicate to report the average value of the measurements carried out.…”

Section: Biopolymer Composite Film Synthesis Processmentioning

confidence: 99%

Electrochemistry Study of Bio-Based Composite Biopolymer Electrolyte—Starch/Cardol

2023

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The environmental problems generated by pollution due to polymers of petrochemical origin have led to the search for eco-friendly alternatives such as the development of biopolymers or bio-based polymers. The aim of this work was to evaluate the electrochemical behavior of a biopolymer composite made from cassava starch and cardol extracted from cashew nut shell liquid. The biopolymers were prepared using the thermochemical method, varying the synthesis pH and the cardol amounts. The biopolymers were synthesized in the form of films and characterized by cyclic voltamperometry and electrochemical impedance spectroscopy. The biopolymers showed a rich electroactivity, with three oxidation–reduction processes evidenced in the voltamperograms. On the other hand, the equivalent circuit corresponding to the impedance behavior of biopolymers integrated the processes of electron transfer resistance, electric double layer, redox reaction process, and resistance of the biopolymeric matrix. The results allowed us to conclude that the cardol content and the synthesis pH were factors that affect the electrochemical behavior of biopolymer composite films. Electrochemical processes in biopolymers were reversible and involved two-electron transfer and were diffusion-controlled processes.

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Section: Biopolymer Composite Film Synthesis Processmentioning

confidence: 99%

Electrochemistry Study of Bio-Based Composite Biopolymer Electrolyte—Starch/Cardol

2023

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Characterization of Cassava Starch and Its Structural Changes Resulting of Thermal Stress by Functionally-Enhanced Derivative Spectroscopy (FEDS)

et al. 2021

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Starch is one of the biopolymers that has been recognized as promising for its application as an eco-friendly substitute for conventional polymers due to its biodegradable nature, low cost, and considerable abundance from renewable vegetal-type resources. In particular, the use of cassava starch as raw material in the manufacture of packaging materials has increased in recent years. Consequently, the analytical study of the quality and features of starch and its derivatives throughout their entire life cycle have gained importance, with non-destructive sample methods being of particular interest. Among these, spectroscopic methods stand out. The aim of this study was evaluated using spectroscopic techniques (i.e., mid-infrared spectroscopy (MIRS) and functional-enhanced derivative spectroscopy (FEDS)) for the monitoring of the effect of the thermal stress of starch in conjunction with computational tools such as density-functional theory (DFT). It is concluded that the FEDS technique in conjunction with DFT calculations can be a useful tool for the high-precision spectral analysis of polymers subjected to small thermal perturbations. In addition, it is demonstrated that small changes produced by thermal stress can be monitored by infrared spectroscopy in conjunction with FEDS at wavenumber range between 3800 and 3000 cm−1, which would allow for the implementation of spectral techniques instead of thermal techniques for out-lab evaluations and for the study of the thermal stress of biomaterials.

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Electrochemical Study of Cassava Starch Conductive Biopolymers Synthesized at Different pH

Cited by 2 publications

References 0 publications

Electrochemistry Study of Bio-Based Composite Biopolymer Electrolyte—Starch/Cardol

Electrochemistry Study of Bio-Based Composite Biopolymer Electrolyte—Starch/Cardol

Characterization of Cassava Starch and Its Structural Changes Resulting of Thermal Stress by Functionally-Enhanced Derivative Spectroscopy (FEDS)

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