Comparative study on physicochemical properties of ZnO-starch nanocomposite on waterlily mango (Mangifera Indica) to inhibit anthracnose disease / Nurfarhana Rosman

Anthracnose disease appears on skin mango can affects mango quality during post-
harvest can be reduced by coating treatment with zinc oxide. This coating project aim

to increase shelf life of mango which is reduce appearance anthracnose disease,
maintain moisture content and their marketable quality. Mango has been coated with
ZnO-starch with different set parameter studied, different size of zinc oxide specifically
10-30 nm and 60-100 nm , different concentration (control, 0.5 M, 1.0 M, 1.5 M, and
2.0 M) of ZnO-starch and different storage temperature (50C, 270C, and 320C) were
varied. This can be achieved by reducing anthracnose disease, maintaining the quality,
and increasing shelf life of mango. Starch as a thickening agent and acts as a permeable
barrier for the gas exchange was mixed with ZnO NP homogeneously and serve as
coating treatment on mango during storage time for 7 days. The physicochemical
properties of mango after coating treatment were studied for their weight loss, moisture
content, total soluble solids (TSS), pH, and titratable acidity (TA) analysis and texture
profile analysis (TPA). Morphological and confirmation of zinc oxide nanoparticle have
been identified using FESEM and EDX respectively, homogeneity dispersion of zinc
oxide nanoparticle in mango coating was characterized by FTIR and crystallinity
properties by XRD. The longest shelf life of mango was found in coating size between
10-30 nm ZnO NP and 1.5 M ZnO-starch solution. Furthermore, the physicochemical
analyses have confirmed the coating ability of ZnO in prolonging the shelf life of Water
Lily mango at a temperature below 5 °C.