Karakterisasi Sifat Separator Komposit PVDF/poli(dimetilsiloksan) Dengan Metode Pencampuran Membran (Blending Membrane)

Devi Eka Septiyani Arifin, Mochamad Zainuri
Submission Date: 2014-08-04 12:39:23
Accepted Date: 2014-09-14 11:50:41

Abstract


Penelitian ini bertujuan membuat bahan separator komposit polivinilidene flouride (PVDF) dan poli(dimetilsiloksan) (PDMS) dengan metode pencampuran membran (blending membrane). Perbandingan variasi komposisi PVDF/PDMS yaitu 10:0, 9:1, 8:2, dan 7:3. Tujuan dari peningkatan fraksi konsentrasi dari PDMS terhadap PVDF untuk meningkatkan performa separator komposit yang meliputi dimensi porositas, kerapatan pori, dan konduktivitas listriknya. Berdasarkan analisa kristalografi dengan menggunkan XRD, peningkatan konsentrasi PDMS mengakibatkan menurunnya derajat kristalinitas, dimana derajat kristalinitas tertinggi dicapai pada perbandingan 10:0 sebesar 63,84% dan terendah pada perbandingan 7:3 sebesar 29,26%, dan berdasarkan interpretasi data FTIR material tersebut termasuk kedalam kriteria bahan komposit karena kedua fasa dari bahan tersebut masih bisa dibedakan bilangan gelombang vibrasi molekuler masing-masing bahan penyusunnya. Hasil analisa XRD fasa kristalin PVDF termasuk kriteria jenis fasa α-PVDF. Semakin tinggi konsentrasi PDMS mengakibatkan penurunan dimensi porositas dan meningkatkan kerapatan porositasnya, dengan dimensi pori terkecil sebesar 1,71 µm dan kerapatan pori sebesar 4,07x1011 count/m2 pada perbandingan 7:3. Pada perbandingan komposisi 7:3 mempunyai nilai konduktivitas listrik sebesar 3,45 x 10-4 S/cm dan resistansi meningkat hingga 80% pada penambahan PDMS. Berdasarkan kriteria diatas, material ini dapat dikategorikan sebagai bahan separator pada baterai ion lithium.


Keywords


Komposit; pori; PVDF/PDMS; separator;

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