Fabrication of Polyimide Matrix with a Janus-like Porous Structure for Tailorable Functionality

To address the challenges of multifunctional integration in electronic devices, this study establishes a versatile material matrix that combines exceptional performance with structural design flexibility, enabling multifunctional “on-demand integration” and “synergistic optimization.” We successfully constructed a polyimide Janus matrix film through an innovative dual-pore-forming agent synergistic pore-forming strategy. The unique “dense-layer-porous-layer” asymmetric structure integrates high mechanical strength (>70 MPa), flexibility, ultralow thermal conductivity (0.067 W·m–1·K–1), and outstanding chemical stability, forming a tailorable functional integration universal platform We demonstrated its “on-demand functionalization” potential by loading CNTs@Fe3O4 hybrid materials, transforming the platform into a functional composite with advanced capabilities such as highly efficient electromagnetic shielding (>40 dB) and active overheating warning. This work transcends the traditional approach of developing single-function materials. The constructed polyimide platform material provides an innovative solution for the integrated design of future electronic devices.