Aplikasi Pelapis Bionanokomposit berbasis Karagenan untuk Mempertahankan Mutu Buah Mangga Utuh

Bayu Meindrawan, Nugraha Edhi Suyatma, Tien Ruspriatin Muchtadi, Evi Savitri Iriani

Abstract


Abstract
Mango is one of Indonesia export comodities which vulnerable to decay during transportation and storage. Coating is known as an effective method to overcome such shortcomings of mango during storage. The objective of this study is to examine the effect of carrageenan-based bionanocomposite coating application for maintaining quality of mango type Gedong gincu stored at 20 oC as well as characterize the mechanical
and water vapor barier properties of resulting film. Zinc oxide nanoparticles (ZnO NPs) (1 % w/w carrageenan) and beeswax (3 % v/v solution), as hydrophobic component, were incorporated into carrageenan polymer to produce bionanocomposite solution. The results showed the mechanical and water vapor barrier properties of carrageenan films were improved by the addition of beeswax and ZnO NPs. N1B1 (carrageenan + beeswax + ZnO NPs) emerged as the most effective coating formulation to delay the change of weight
loss, firmness, CO2 production, total acidity as well as alteration in color parameters (L, a and b) of mango
during storage. Carrageenan-based bionanocomposite coating was potential as alternative method to keep
the quality of mango during storage.

Abstrak
Mangga merupakan salah satu komoditas ekspor Indonesia yang rentan mengalami kerusakan selama transportasi dan penyimpanan. Pelapisan dikenal sebagai metode yang efektif untuk mengatasi masalah mangga selama penyimpanan. Tujuan dari penelitian ini adalah mengkaji pengaruh aplikasi
pelapis bionanokomposit berbasis karagenan dalam mempertahankan kualitas mangga jenis Gedong gincu yang disimpan pada suhu 20 oC serta mengkarakterisasi sifat mekanis dan barier uap air dari film yang dihasilkan. Nanopartikel seng oksida (NP-ZnO) (1% b/b karagenan) dan beeswax (3 % v/v larutan), sebagai komponen hidrofobik, diinkorporasikan ke dalam polimer karagenan untuk menghasilkan larutan bionanokomposit. Hasil penelitian menunjukkan sifat mekanis serta barier uap air dari film karagenan mampu diperbaiki dengan penambahan beeswax dan NP-ZnO. N1B1 (karagenan + beeswax + NP-ZnO)
muncul sebagai formulasi pelapis yang paling efektif dalam menekan perubahan susut bobot, kekerasan, produksi CO2, total asam serta perubahan parameter warna (L, a dan b) mangga selama penyimpanan. Pelapis bionanokomposit berbasis karagenan potensial sebagai alternatif metode untuk menjaga kualitas mangga selama penyimpanan.

Keywords


mango, bionanocomposite, carrageenan, beeswax, ZnO nanoparticles

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