Synthesis and Characterizations of Membrane Composite Polymer Liquid Crystal of PMMA-RM257-Doped with Lithium Ions

Afrizal Afrizal; Setia Budi; Asep Riswoko; Teguh Budi Prayitno; Della Dewanda

doi:10.22146/ijc.106762

Synthesis and Characterizations of Membrane Composite Polymer Liquid Crystal of PMMA-RM257-Doped with Lithium Ions

https://doi.org/10.22146/ijc.106762

Afrizal Afrizal^(1*), Setia Budi⁽²⁾, Asep Riswoko⁽³⁾, Teguh Budi Prayitno⁽⁴⁾, Della Dewanda⁽⁵⁾

(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl. Rawamangun Muka No. 10, Jakarta Timur 13220, Indonesia
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl. Rawamangun Muka No. 10, Jakarta Timur 13220, Indonesia
(3) Research Center for Polymer Technology – National Research and Innovation Agency (BRIN), KST BJ Habibie, Kawasan Puspiptek Building 460, Tangerang Selatan 15314, Indonesia
(4) Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl. Rawamangun Muka No. 10, Jakarta Timur 13220, Indonesia
(5) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl. Rawamangun Muka No. 10, Jakarta Timur 13220, Indonesia
(*) Corresponding Author

Abstract

A membrane composite polymer liquid crystal of Polymethyl Methacrylate with Mesogen Reactive 257, doped with lithium ions (PMMA-RM257-Li), has been successfully synthesized. Synthesized PMMA-RM257-Li using methods of UV exposure to polymer solutions and were made with RM257 variations of 10, 30, 50, 70 and 90 wt.%. Membrane composite polymer PMMA-RM257-Li was characterized by FTIR where absorption peaks appear at wavenumbers 2935 cm⁻¹ indicating the-CH₃ functional group, 1730 cm⁻¹ indicating the C=O functional group, and 1630–1660 cm⁻¹ indicating the presence of aromatic groups. Analysis of crystallinity by XRD results showed that the membrane polymer PMMA-RM257-Li is semicrystalline. The composite membrane obtained optimum test results at the addition of 50 wt.% RM257 with an ionic conductivity of 1.01 × 10⁻³ S/cm and an ion exchange capacity value of 0.02385 meq/g. This study shows that the addition of 50 wt.% RM257 provides the most optimal membrane characteristic results. The characterization results showed that the addition of lithium ions to the manufacture of PMMA-RM257 membranes improved the membrane's capabilities for membrane fuel cell technology.

Keywords

methyl methacrylate; membrane; reactive mesogen; conductivity

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DOI: https://doi.org/10.22146/ijc.106762