Enhancing Thermo-Mechanical Properties of Epoxy Nanocomposites with Dispersed MWCNTs Using a Novel Hybrid Mixing Technique

This study presents an innovative approach to enhance the thermo-mechanical properties of multi-walled carbon nanotube (MWCNT) reinforced epoxy nanocomposites through a dual-action dispersion method. By simultaneously applying ultrasonic energy and shear force via an axial-flow impeller, a uniform distribution of MWCNTs within the epoxy matrix was achieved without the need for chemical modification. The impact of MWCNT loading (0.25 - 1.0 wt%) on the thermal and mechanical behavior of the composites was systematically investigated. Dynamic mechanical analysis revealed a significant improvement in storage modulus, with a maximum enhancement observed at 0.75 wt% MWCNT content. Thermogravimetric analysis demonstrated increased thermal stability, confirming the efficiency of nanotube reinforcement. Scanning electron microscopy of fracture surfaces validated the homogeneity of nanotube distribution and provided insights into fracture mechanics. These findings suggest that the adopted hybrid dispersion technique is effective for fabricating high-performance polymer nanocomposites for structural applications.