APLIKASI PELAPISAN NANOKOMPSIT UNTUK MEMPERTAHANKAN KUALITAS SALAK PONDOH (Salacca edulis Reniw)

Abstract

Pelapisan nanokomposit dapat meningkatkan karakteristik fisik, mekanis serta fungsional dari bahan pelapis. Penelitian ini bertujuan untuk mengetahui pengaruh pelapisan nanokomposit dengan berbagai polimer (gelatin dan kitosan) yang ditambahkan seng oksida dan beeswax untuk menjaga kualitas salak pondoh selama penyimpanan. Hasilnya menunjukkan bahwa penambahan emulsi beeswax dan NP-ZnO dapat menurunkan nilai WVTR dari 25.6 menjadi 13.75 g/m2jam. Penambahahan beeswax dan NP-ZnO juga dapat merubah sifat antimikroba film kitosan dan gelatin. Aplikasi nanokomposit mampu menurunkan kehilangan berat salak pondoh selama penyimpanan dibandingkan dengan kontrol salak pondoh (P <0,05). Kontrol salak memiliki nilai penurunan susut bobot tertinggi sebesar 18,57% sedangkan salak dengan perlakuan WC3 dan WG3 memiliki nilai 12,72% dan 13,92%, persentase kerusakan sebesar 76,19% pada hari ke 28 penyimpanan. Aplikasi pelapisan nanokomposit juga mampu mempertahankan kekerasan dan persen tingkat kerusakan selama penyimpanan. Application of nanocomposite based on Chitosan and Gelatin to maintain quality of Salacca fruit. (Salacca edulis Reniw).Nanocomposite coating could enhance the physical and mechanical characteristic as well as functional of material coatings. This research aimed to determine the application of nanocomposite coating with various polymers (gelatin and chitosan) which added zinc oxide and beeswax to maintain the quality of salak pondoh during storage. The result showed that the addition of beeswax emulsion and ZnO-NPs significantly decreased WVTR value from 25.6 to 13.75 g/m2 hours. The addition of beeswax emulsion and ZnO-NPs also changed the antimicrobial properties of chitosan and gelatin films Aplication of nanocomposite coating was able to decrease the weight loss of salak pondoh during storage compared to salak pondoh control (P <0.05). Salak control has the largest weight loss value of 18.57% while salak with WC3 and WG3 treatment has a value of 12.72% and 13.92%, percentage of decai has value 76.19% on 28 days storage. Application of nanocomposite coating are also able to maintain quality such as firmness and percentage of decay during storage.