Fabrikasi Membran PES Ultrafiltrasi Dan Kinerjanya Pada Penyisihan Fosfolipid Minyak CPO

Fachrul Razi, Umi Fathanah, Novia Mehra Erfiza

Abstract


Penyisihan kandungan fosfolipid dalam minyak mentah kelapa sawit (CPO) telah dilakukan menggunakan membran ultrafiltrasi polietersulfon (PES). Membran PES dibuat secara inversi fasa dengan variasi konsentrasi polimer PES yaitu 15% dan 18% (%-b) dan pelarut dimetil sulfoksida (DMSO). Membran yang dihasilkan disebut membran PES-15 dan PES-18. Selanjutnya Membran PES dilakukan uji karakterisasi yaitu observasi struktur morfologi membrane menggunakan scanning electron microscopy (SEM) dan analisa komposisi kimia menggunakan FT-IR. Unjuk kerja membran PES pada penyisihan fosfolipid dalam minyak CPO dilakukan secara ultrafiltrasi menggunakan modul dead-end.  Rasio komposisi CPO dan heksana dalam larutan umpan yaitu 40%:60% dan 60%:40% (b/b).  Hasil SEM membran memperlihatkan bahwa membran PES-15 dan PES-18 memiliki struktur asimetrik dengan lapisan atas berupa lapisan tipis dan rapat (dense) sedangkan lapisan penyangga (support) berupa lapisan berongga (porous dengan struktur pori berbentuk jari. Hasil analisis komposisi kimia baik pada membran PES-15 dan PES-18 menunjukkan adanya gugus C=O dan 0=S=O pada kedua jenis membran yang mengindekasikan struktur molekul PES. Kinerja penyisihan fosfolipid tertinggi diberikan oleh membran PES-15 untuk umpan larutan CPO dengan komposisi 60% CPO:40% heksana (b/b) dimana persen penyisihan fosfolipid mencapai 97%

 

Kata kunci:  penyisihan fosfolipid, minyak cpo, ultrafiltrasi, membran PES, stuktur assimetrik


Keywords


penyisihan fosfolipid; minyak cpo; ultrafiltrasi; membran PES; stuktur assimetrik

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References


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DOI: https://doi.org/10.23955/rkl.v14i1.13091

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