<p>A novel nanocomposite consisting of triglycine sulfate (79 wt%) filled with multiwalled carbon nanotubes (1 wt%) and nanocellulose (20 wt%) was prepared for exploring anomalous properties under different compression pressures from 5 to 200&#xa0;MPa. Fourier-transform infrared spectroscopy was used to characterize and evaluate the structural changes of the samples. It was estimated that the increase in pressure results in the rise of permittivity and conductivity because of the improved connectivity of conductive pathways created by multiwalled carbon nanotubes. The optimal pressure was found in approximately 50 – 150&#xa0;MPa. Deviation from this range might lead to instability in the material properties, including the decrease over time in permittivity, the change of polarization switching and conductivity. Additionally, the samples became more stable at low temperatures due to the enhanced role of hydrogen bonds.</p> Graphical abstract <p></p>