Electrically conductive nanocomposite adhesives based on epoxy resin filled with silver coated nanocarbon black

This study is focused on preparation of electrically conductive nanocomposite adhesive based on epoxy resin as polymeric matrix and nanocarbon black as conductive filler. For this purpose, commercial nanocarbon black was chemically modified by oxidizing acids and then was coated with silver nanoparticles. Nanocarbon black samples with different percentages of conductive filler were synthesized and used in preparation of nanocomposite adhesives. Electrically conductive adhesive with optimum properties was the one containing 30 wt% of conductive filler with bulk resistance of 0.0364 a"broken vertical bar cm and lap shear strength of 6.77 MPa. SEM images showed that good conductive paths are generated in polymer matrix. Also, weight reduction percentage during thermal gravimetric analysis was from 88.71 to 51.31% and degradation temperature was increased from 200 to 340 degrees C, which showed an improvement in thermal stability with an increment in filler percentage.