Characterization and Production of a Polyhydroxyalkanoate from Cassava Peel Waste: Manufacture of Biopolymer Microfibers
- PDF / 1,680,837 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 17 Downloads / 177 Views
ORIGINAL PAPER
Characterization and Production of a Polyhydroxyalkanoate from Cassava Peel Waste: Manufacture of Biopolymer Microfibers by Electrospinning Oscar Vega‑Castro1 · Emilson León1 · Mario Arias2 · M. Teresa Cesario3 · Frederico Ferreira3 · M. Manuela R. da Fonseca3 · Almir Segura4 · Pedro Valencia5,6 · Ricardo Simpson5,6 · Helena Nuñez5 · José Contreras‑Calderon1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Hydrolysate cassava peel obtained from agro-industrial residues was used as a carbon source in the production of polyhydroxyalkanoates (PHAs) by Cupriavidus necator. The optimum culture conditions were pH 9, a C/N ratio of 11, and a C/P ratio of 7. Characterization of the PHA polymers by FTIR, DSC and GC–MS revealed copolymers consisting of 3HB and 3HV monomers with melting temperatures (Tm) between 100 and 150 °C. Random and aligned microfibers with average diameters of 1.56 ± 0.41 μm and 1.72 ± 0.52 μm, respectively, were produced by electrospinning. In general, it was possible to obtain PHAs from cassava peel, and PHAs could be applied to produce fibers by electrospinning. The above strategy is an alternative use of agro-industrial cassava waste and opens up potential applications in the manufacture of biopolymers for their use in industry and biomedicine. Graphic Abstract
Keywords Cassava peel · Polyhydroxyalkanoate · Electrospinning · Biopolymers · NMR Extended author information available on the last page of the article
13
Vol.:(0123456789)
Introduction Cassava cultivation (Manihot esculenta) is of great importance for Colombia’s economy. In fact, 2.1 million tons of cassava are produced annually on a crop area of approximately 230,000 ha [1]. Consequently, cassava production generates approximately 630,000 tons/year of agroindustrial waste [1]. Therefore, developing applications for cassava waste products is of major importance. Some possible applications for cassava waste have already been proposed, including the production of cassava pullulan [2], biofertilizers [3], absorbent Bio-Bio [4] and biogas [5], which is important since only a small amount of agricultural waste is currently used to produce animal feeds, manure, and other valuable products. The production of biopolymers is another valuable alternative for using agricultural waste [6]. In addition, bioplastics are superior to conventional plastics derived from fossil fuels in terms of energy efficiency, carbon emission, and the consumption of petroleum [7]. This work assesses the potential use of cassava waste for the production of polyhydroxyalkanoates (PHAs). PHAs are biodegradable polyesters synthesized by different bacterial strains that store these polymers in intracellular pockets as energy reserves in response to excess carbon and under nutrient-limited conditions [8]. PHAs degrade completely into nontoxic products [9], constituting an important solution to the environmental problem caused by the use of persistent petroleum-based synthetic plastics. The monomeric composition of PHAs
Data Loading...
