SINTESIS MEMBRAN KOMPOSIT NANOSILIKA LAPINDO-NAFION d2020 UNTUK FUEL CELL SUHU TINGGI; SYNTHESIS OF NANOSILICA LAPINDO-NAFION d2020 COMPOSITE MEMBRANE FOR HIGH TEMPERATURE FUEL CELL

Windi Susmayanti, Wega Trisunaryanti

2014 | Disertasi | PROGRAM STUDI S2 KIMIA

Synthesis of nanosilica Lapindo-Nafion d2020 composite membrane for high temperature Fuel Cell have been investigated. Synthesis of silica from Lapindo Mud through coprecipitation method using NaOH 6 M and HCl 3 M continued with NaOH 2.5 M and H2SO4 3 M. Characterization of silica means of the silica was conducted using XRD, FT-IR, TEM. The composite membrane was prepared by mixing 5% of Nafion d2020 solution and 3 w.t% of nanosilica Nafion d2020 using disperse and casting methods. Characterization results using XRD, FT-IR, SEM-EDX, TGA and character of ionic conductivity and swelling water. Characterization of FT-IR and XRD results showed that the silica was successful synthesized from lapindo mud. The TEM analysis showed that the silica has particle sized of 30-100 nm using NaOH 6 M and HCl 3 M and 5-16 nm using NaOH 2.5 M and H2SO4 3 M. Nanosilica Lapindo-Nafion d2020 composite membrane was successfully produced which confirmed by FT-IR, XRD, TGA, SEM-EDX. The hydrogen bonding was shown on surface of nanosilica and sulfonated groups of Nafion d2020. The proton conductivity, swelling water, and high temperature durability of the composite membranes were higher than those of Nafion d2020 membranes. Proton conductivity of nanosilica Lapindo-Nafion d2020 composite membrane was 6.09 x 10-2 S/cm, swelling water was 55.274 % and high temperature durability on operating system fuel cell was 120?C. Proton conductivity of Nafion d2020 membrane was 5.34 x 10-2 S/cm, swelling water was 45.15 % and high temperature durability on operating system fuel cell was 80?C.

Kata Kunci : Lapindo mud, Nanosilica, Coprecipitation, Nafion d2020, Composite.