Conductive Polymer Composites

Abstract

Insulating polymer materials can be made electronically conductive through the incorporation of electrically conductive fillers. These composite materials are called electrically conductive polymer composites. This article reviews a special class of conductive polymer composites—isotropically conductive adhesives (ICAs). We summarize recent advances in ICA technologies and its application as a lead‐free alternative to metal solders. We discuss how the properties of ICA can be engineered for electronic packaging in terms of material properties, conductive mechanisms, bulk conductivity, adhesion, reliability, and cost. We conclude with a discussion of commercial processes for ICA use in consumer electronics.

The Effect of Chemical Surface Treatment on Mechanical Performance of Electrically Conductive Adhesives

“…3, sheet resistance decreases when filler loading is increased from 5 wt.% to 7 wt.%. As expected, an increase of MWCNT loading contributes to lower electrical resistivity in ECA due to an increase of contact, an increase of probability of continuous linkage, and an enhancement formation of a three-dimensional network between MWCNT conductive particles in ECA 5,13) . The result is in good agreement with demonstrated by Xuechun and Feng 14) , in which increasing MWCNT reduce bulk resistivity of MWCNT/epoxy composites as Besides, the standard deviation of sheet resistance significantly decreases from 9.46 kΩ to 0.35 kΩ with an increase of filler loading in ECA from 5 wt.% to 7 wt.% respectively, an indication of more reliable measurement of sheet resistance obtained 15,16) .…”

Solution-Processed Conductive Biocomposites Based on Polyhydroxybutyrate and Reduced Graphene Oxide

“…Conductive biopolymer nanocompositesconsisting of conductive nanofillers embedded within an insulating biopolymer matrixhave tremendous potential in applications such as sensors, nanoactuators, conductive adhesives, etc. 1 Such materials have also been proposed for biomedical applications including wound-healing and tissue engineering. 2 In conductive polymer composites (CPCs), the concentration of the nanofiller effects many properties of the network, including conductivity, with a minimum loading required to form a continuous network, causing the material to undergo transition from insulating to conductive (i.e., the percolation threshold).…”

“…Like all polymers, the properties of biopolymers may be modified through the addition of a filler. Conductive biopolymer nanocompositesconsisting of conductive nanofillers embedded within an insulating biopolymer matrixhave tremendous potential in applications such as sensors, nanoactuators, conductive adhesives, etc . Such materials have also been proposed for biomedical applications including wound-healing and tissue engineering .…”