6 research outputs found
Fluorographene with High Fluorine/Carbon Ratio: A Nanofiller for Preparing Low‑κ Polyimide Hybrid Films
Sufficient amounts of fluorographene
sheets with different sheet-size
and fluorine/carbon ratio were synthesized for preparing of fluorographene/polyimide
hybrids in order to explore the effect of fluorographene on the dielectric
properties of hybrid materials. It is found that the fluorine/carbon
ratio, width of band gap, and sheet-size of fluorographene play the
important roles in determining the final dielectric properties of
hybrids. The fluorographene with high fluorine/carbon ratio (F/C ≈
1) presents broaden band gap, enhanced hydrophobicity, good dispersity
and thermal stability, etc. Even at a very low filling, only 1 wt
%, its polyimide hybrids exhibited drastically reduced dielectric
constants as low as 2.1 without sacrificing thermal stability, improved
mechanical properties obviously and decreased water absorption by
about 120% to 1.0 wt %. This provides a novel route for improving
the dielectric properties of materials and a new thought to carry
out the application of fluorographene as an advanced material