AKTIVASI NANOPARTIKEL ZnO DAN KITOSAN PADA FILM BIOPLASTIK BERBASIS PVA/KARAGENAN UNTUK MENAMBAH MASA SIMPAN BUAH STROBERI

This study developed an active Bioplastik film based on polyvinyl alcohol (PVA)/carrageenan incorporated with ZnO nanoparticles (0.1 g) and varying kitosan concentrations (0-6 g) as active packaging to extend the shelf life of strawberries. The films were prepared via solution casting and characterized for physical properties, optical properties, and biodegradability (soil burial test), followed by application testing on strawberries stored at room temperature. Results showed that increasing kitosan concentration consistently increased film thickness (0.277-0.431 mm), moisture content, and mechanical properties, while ZnO nanoparticles enhanced opacity and reduced water solubility. All formulations were Bioplastik, with weight loss ranging from 34.35-61.78% after 5 days of soil burial. In the application test, all active film treatments were more effective in maintaining strawberry quality than the control, with the Kitosan 6 g formulation showing the best performance: weight loss of 15.20% (Day 9), visually firm texture, and relatively stable red color up to Day 9, followed by Kitosan 5 g and Kitosan 4 g formulations. The combination of kitosan and ZnO nanoparticles in a PVA/carrageenan matrix produced an effective, environmentally friendly active packaging capable of significantly extending the shelf life of strawberries.
Keywords: active Bioplastik film, PVA/carrageenan, ZnO nanoparticles, kitosan, shelf life, strawberry
Penelitian ini mengembangkan film Bioplastik aktif berbasis PVA/karagenan dengan nanopartikel ZnO (0,1 g) dan variasi kitosan (0-6 g) sebagai kemasan aktif untuk memperpanjang umur simpan stroberi. Film dibuat dengan metode solution casting dan dikarakterisasi dari segi sifat fisik, optik, dan biodegradabilitas (soil burial test), serta diuji efektivitasnya pada buah stroberi suhu ruang. Hasil menunjukkan peningkatan kitosan meningkatkan ketebalan (0,277-0,431 mm) dan kadar air film, sedangkan ZnO meningkatkan opasitas secara signifikan. Seluruh formulasi terbukti Bioplastik dengan kehilangan berat 34,35-61,78% selama 5 hari. Pada uji aplikasi, semua film aktif lebih efektif menjaga kualitas stroberi dibanding kontrol, dengan formulasi Kitosan 6 g menunjukkan performa terbaik: susut bobot 15,20% (Hari ke-9), tekstur masih keras, dan warna merah cerah relatif terjaga hingga hari ke-9, diikuti formulasi Kitosan 5 g dan Kitosan 4 g. Kombinasi kitosan dan ZnO dalam matriks PVA/karagenan menghasilkan kemasan aktif yang efektif, ramah lingkungan, dan mampu memperpanjang umur simpan stroberi.
Kata Kunci: film Bioplastik aktif, PVA/karagenan, nanopartikel ZnO, kitosan, umur simpan, stroberi