SDS-stabilized graphene nanosheets for highly electrically conductive adhesives. (September 2015)

• Record Type: Journal Article
• Authors: Meschi Amoli, Behnam; Trinidad, Josh; Rivers, Geoffrey; Sy, Serubbabel; Russo, Paola; Yu, Aping; Zhou, Norman Y.; Zhao, Boxin
• Is Part Of: Carbon. Volume 91(2015)
• Page Start: 188
• Page End: 199
• Publication Date: 2015-09
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.04.039
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: We report sodium dodecyl sulfate (SDS) stabilization of graphene nanosheets, with two different sizes as auxiliary fillers inside the conventional electrically conductive adhesive (ECA) composite. Using this non-covalent modification approach we were able to preserve the single-layer structure of graphene layers and prevent their re-stacking inside the composite, which resulted in a significant electrical conductivity improvement of ECAs at noticeably low filler content. Addition of 1.5 wt% small and large SDS-modified graphene into the conventional ECAs with 10 wt% silver flakes led to low electrical resistivity values of 5.5 × 10 3 Ω cm and 35 Ω cm, respectively, while at least 40 wt% of silver flakes was required for the conventional ECA to be electrically conductive. A highly conductive ECA with very low bulk resistivity of 1.6 × 10 −5 Ω cm was prepared by adding 1.5 wt% of SDS-modified large graphene into the conventional ECA with 80 wt% silver flakes which is less than that of eutectic lead-based solders.