<p>The food industry’s pivot toward cleaner and more sustainable alternatives to conventional petrochemical-based packaging plastics is a crucial and timely development. This shift has brought biopolymers to the forefront as potential substitutes for these materials in film-forming solutions derived from polysaccharide, protein, and lipid sources or their mixtures. The addition of nanoparticles to these biopolymers plays a crucial role in modifying their mechanical and antimicrobial properties, making them suitable for use as nanosensors to monitor the state of food during the transport and storage stages. In this work, calcium caseinate-LDH films were prepared using the casting method. The structural, vibrational, and electrical properties were evaluated.</p> Graphical abstract <p>Tan <i>δ</i> of composite material based on Calcium caseinate-Mg:Al Layered Double Hydroxide (LDH). At low LDH concentration, the frequency of Tan <i>δ</i> remains as raw calcium caseinate, but with higher LDH concentration, there was a displacement to higher frequencies. This behaviour is associated to the interparticle effect over the caseinate structure</p>