MXene-based composite foams are gaining significant attention due to their unique two-dimensional structure and outstanding thermal and mechanical properties. This study presents a novel approach for fabricating self-blown MXene/Non-Isocyanate Polyurethane (NIPU) composite foams, combining advanced nanomaterials with sustainable polymer chemistry. MXene (Ti₃C₂Tₓ) was synthesized under mild conditions by selectively etching aluminum from the Ti₃AlC₂ MAX phase using LiF and 9M HCl at 35 °C, followed by exfoliation via ultrasonication to obtain few-layer nanosheets. The nanosheets were then incorporated into NIPU formulations through solution mixing with cyclic carbonate and tetrahydrofuran (THF), ensuring uniform dispersion. After THF removal, the addition of amines and water initiated an in situ polymerization process, where the CO₂ generated during the reaction acted as a natural blowing agent, forming lightweight and environmentally friendly foams. The resulting MXene/NIPU foams demonstrated enhanced thermal stability, mechanical strength, and electrical conductivity compared to conventional NIPU foams, making them promising candidates for applications in thermal insulation, energy storage, and lightweight structural materials. This work highlights the successful integration of MXene into sustainable polymer chemistry, contributing to the development of high-performance materials with reduced environmental impact.