Bioplastic composed of starch and micro-cellulose from waste mango: mechanical properties and biodegradation

Abstract

Waste mango was used to obtain starch and micro-cellulose for the production of bioplastic. Three different formulations were made: positive control or cotyledon starch/glycerol; SC 1 or cotyledon starch/glycerol and cellulose at 0.1% and SC 5 or cotyledon starch/glycerol and cellulose at 0.5% w/w. The bioplastics were mechanically analyzed (tensile strength, elongation and Young´s modulus) and, aerobic biodegradation analysis was realized with a standard test method based on the amount of material carbon converted to CO 2 . The mechanical tests indicated that with the addition of cellulose, the bioplastics improved their mechanical properties. The biodegradation at 30 days showed 93 and 94% for SC 1 and SC 5 . Therefore, the biodegradation of bioplastics depends on both, the addition of cellulose and the environment where they are placed (e.g., soil characteristics: pH level, C:N ratio, moisture). These bioplastics offer new opportunities for fast degrading biomaterials in agricultural applications (padding and protection bags).

In vitro characterization of bionanocomposites with green silver nanoparticles: A step towards sustainable wound healing materials

“…Each experiment was performed in triplicate and the data were subsequently processed and analyzed using Microsoft Excel tools using Equations ( 4) and (5). Where appropriate, the results were provided with the mean (x) ± standard deviation (SD) values.…”

“…[4] While agar and cellulose components are less effective when used alone in hydrogels, when combined with other natural additives to produce bioplastics -the mechanical properties can be significantly improved, with increased strength and extensibility. [5] In addition to this, whilst collagen hydrogels provide an effective environment for wound healing, [6] current uses do not conventionally use green silver nanoparticles within its matrix as a method of imparting the material with antimicrobial properties and tunable mechanical properties, paving a path to evade the main short-coming of collagen scaffolds. [7] Current methods of obtaining silver nanoparticles use toxic and expensive chemicals as reducing agents -making their use both expensive and damaging for the environment.…”

The Influence of Adding Glycerol and Spirulina on The Characteristics of Starch-Based Bioplastics Film from Potato Peel Waste

“…Organic materials such as polysaccharides, proteins, lipids, or specific substances produced by microalgae can be used as materials for making bioplastics (Ayu & Ningsih, 2020). Commonly used polysaccharides for bioplastic production include starch and cellulose (Rendón-Villalobos et al, 2022). Starch can be sourced from corn, cassava, potatoes, sweet potatoes, and others.…”