High-Performance and Thermostable Mica/Cellulose Composite Paper for Sustainable Packaging Applications

Abstract

In this study, high-performance packaging paper was developed by dissolving softwood cellulose in a LiOH/urea system and incorporating nano-mica to enhance its mechanical properties and thermal stability. Characterization by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) confirmed partial crystalline transformation in the regenerated cellulose films. Mechanical testing showed that the composite film with 10% mica exhibited a tensile strength of 87.69 MPa and a modulus of 6.82 GPa, demonstrating excellent tensile strength, rigidity, and tear resistance, making it suitable for high-strength packaging applications. Thermogravimetric analysis revealed that the composite paper underwent  major thermal degradation at approximately 350 °C, offering superior thermal stability over conventional cellulose-based packaging materials, making it ideal for industrial and electronic component packaging. This study successfully developed a sustainable, high-performance packaging material through the synergistic effects of nanocellulose and nano-mica, providing new insights for advanced cellulose-based packaging solutions.