Synthesis, characterization, fabrication and application of electrospun nanofiber polymer composite: a potential bio-material for black mold rot (Aspergillus niger) of onions (Allium cepa L.)

Abstract

Nanomaterial is widely researched because of its enormous potential. In this study, the anti-fungal activity of electrospun nanofiber polymer composites infused with malunggay extracts (ME) was investigated. Cellulose acetate (CA) from abaca fiber, nano silica (nSiO2) from rice husks, and nano copper oxide nCuO from cavendish banana peel were synthesized, characterized and used as stabilizing agent. Electrospun nanofiber polymer composites infused with malunggay extracts was successfully fabricated. The inhibitory effects of the fabricated nanofiber were determined using different concentrations of ME. Results showed that 100 % concentration of malunggay extract (ME) mixed with 50 mg of nSiO2 and 50 mg of nCuO) had a presence of small crystal-like structures that indicates the successful infusion of the bio-materials. The nanofibers showed inhibitory effect against A. niger both in in vitro and in vivo. It displayed the highest zone of inhibition, lowest weight loss and disease severity index which is comparable to the fungicide. This study confirms the antifungal potential of the Electrospun nanofiber polymer composites infused with malunggay extracts on the test fungi and suggests the possibility of employing them in food preservation were spoilage is mainly caused by A. niger.