Ida Bagus Gede Mahatmananda, Arum Widyastuti Perdani, Bambang Purwono, Andriati Ningrum, Supriyadi Supriyadi
This study develops intelligent films from porang-derived glucomannan and gelatin enriched with RPAE (native and gallic-acid-copigmented) for shrimp freshness monitoring. The films showed improved performance, TS up to 9.37 MPa, EAB up to 31.90%, and WVP of 3.10-4.72×10⁻7 g·m⁻1·Pa⁻1·h⁻1 together with enhanced radical-scavenging activity. FTIR indicated hydrogen-bonding interactions among gelatin, glucomannan, and anthocyanins, while SEM revealed smoother, more homogeneous morphologies for copigmented systems. The films exhibited a clear pH-dependent optical response with visually perceptible shifts (ΔE > 5). During shrimp storage, TVB-N increased from 28.11 to 71.03 mg N/100 g and TVC from 5.24 to 6.27 log CFU/g; the film color transitioned from green to yellow in parallel with quality deterioration, enabling non-invasive, real-time indication of spoilage. Leveraging locally abundant biopolymers and colorants, these films advance sustainable, intelligent packaging for seafood quality and safety. © 2026, Walailak University. All rights reserved.
Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia; Applied Culinary Arts Study Program, Faculty of Vocational Studies, Universitas Negeri Yogyakarta, Gunungkidul Campus, Special Region of Yogyakarta, Yogyakarta, 55893, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia; Centre of Excellent for Indonesian Gastronomy, Universitas Gadjah Mada, Yogykarta, 55281, Indonesia
