Highly conductive, flexible PU/PANI based conductive adhesives for flexible electronics

Composite matrix material based on polyurethane (PU) and polyaniline (PANI) were synthesized via a simple process. The composite material and the silver flakes were used as matrix and filler, respectively. Resistivity can be achieved as low as 3.8×10 -5 Ω•cm at 70 wt.% loadings, suggesting good conductive properties. The conductivity of the electrical conductive adhesive sample was basically unchanged after 400 cycles of bending and 1000 cycles of twisting. The flexible electrical conductive adhesives (FECAs) possess not only good mechanical properties but superior electrical conductivity with good stability even under bending. These superior material properties combined with excellent performance and simple processing make it very promising for emerging flexible electronics.