Study of Reduced Graphene Oxide addition on the Electrical Conductivity and Flexural Strength of Metakaolin-based Geopolymer

Elsy Rahimi Chaldun (Loka Penelitian Teknologi Bersih Lembaga Ilmu Pengetahuan Indonesia)
Andrie Harmaji (Teknik Metalurgi Institut Teknologi dan Sains Bandung)
Nindya Kirana Prabaswari
Lina Nur Listiyowati
Achmad Subhan
Syoni Soepriyanto (Teknik Metalurgi Institut Teknologi dan Sains Bandung)

Jurnal Keramik dan Gelas Indonesia
Vol 29, No 1 (2020): Jurnal Keramik dan Gelas Indonesia

Geopolymer with reduced Graphene Oxide (rGO) composite obtanined through Hummers method. This material is a substitute option for graphene because the nature of rGO is easier to produce in large quantities. In theory, it is expected that rGO can increase the flexural strength and electrical conductivity of geopolymer. The rGO composition used varies from 0-1 wt%. Geopolymer and their constituents were characterized by the Three Point Bending, EIS, SEM, FTIR, XRD, and XRF tests. Fly ash-based geopolymers have a flexural strength of 5.2 MPa at a composition of 0.5 wt% rGO, while metakaolin-based geopolymers with an addition of 0.25% rGO produce the highest flexural strength of 5.53 MPa. A frequency of 100,000 Hz tends to facilitate greater electrical conductivity, on fly ash-based geopolymers found electrical conductivity of 5.08 x 10-3 S / m, while for metakaolin-based geopolymers the electrical conductivity is higher ie 1.01 x 10-1 S / m.