Comparison Studies Of SiO2 and HCl-SiO2 Filler On The Film Formation And Ionic Conductivity Of PMMA/ENR 50 Electrolytes

Sharil Fadli Mohamad Zamri1,2*, Famiza Abdul Latif1, 2, Siti Izzati Husna Mohd Azuan1, Ab Malik Marwan Ali1, Ruhani Ibrahim1, Norashima Kamaluddin1, Fitrah Hadip

1School of Chemistry & Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

2Synthesis and Application of Conducting Polymer Research Group, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

Adv. Mater. Lett., 2016, 7 (6), pp 456-460

DOI: 10.5185/amlett.2016.6125

Publication Date (Web): May 30, 2016

E-mail: sharil7240@salam.uitm.edu.my

Abstract


In this study, polymer electrolytes derived from polymethyl methacrylate/50 % epoxidized natural rubber (PE) were successfully prepared. The effects of silicon dioxide (SiO2) (15 nm) and acid modified SiO2 (HCl-SiO2) (15 nm) on the film formation and ionic conductivity of polymer electrolytes were investigated. In samples preparation, SiO2 was used as received. Meanwhile, HCl-SiO2 was prepared by reacting SiO2 with 7 M of hydrochloric acid (HCl) solution. PE, PE filled with SiO2 (PE-SiO2) and PE filled with HCl-SiO2 (PE-HCl-SiO2) electrolytes were prepared by solvent casting method with tetrahydrofuran (THF) as solvent and lithium tetrafluoroborate (LiBF4) as doping salt. The smoothness surface, opacity and agglomeration of PE-HCl-SiO2 film were found in between PE and PE-SiO2. CHNS analysis shows that the percentage of hydrogen in HCl-SiO2 and SiO2 are 0.88 and 2.07 %, respectively. Fourier transform infra-red (FT-IR) analysis confirm that HCl-SiO2 has low number of silanol group (Si-OH) but high number of siloxane group (Si-O-Si) compared to SiO2. Field Emission Scanning Electron Microscopy (FESEM) analysis shows that HCl-SiO2 has smaller size of agglomeration and porosity compared to SiO2. Meanwhile, electrochemical impedance spectroscopy (EIS) analysis shows that the ionic conductivity of  PE-HCl-SiO2 is higher than PE but slightly lower than PE-SiO2

Keywords

Silicon dioxide, silanol group, polymethyl methacrylate, epoxidized natural rubber, polymer electrolyte

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