STUDI PENGARUH KONDISI DIP-COATING TERHADAP PENINGKATAN PERFORMA MEMBRAN KOMPOSIT SILIKA HIDROFOBIK UNTUK PEMISAHAN MINYAK-AIR

Martua Manik, Harryson and Ir. Bambang Poerwadi, MS and Supriyono., ST., MT., Ph.D. (2021) STUDI PENGARUH KONDISI DIP-COATING TERHADAP PENINGKATAN PERFORMA MEMBRAN KOMPOSIT SILIKA HIDROFOBIK UNTUK PEMISAHAN MINYAK-AIR. Sarjana thesis, Universitas Brawijaya.

Abstract

Membran komposit dengan polimer berupa silika aerogel superhidrofobik telah dibuat dengan proses modifikasi permukaan silika. Silika aerogel dibuat dengan menggunakan waterglass sebagai prekursor dan TEOS sebagai agen pemodifikasi permukaan. Waktu perendaman kain katun selama proses dip-coating diuji pada variabel waktu 5, 10, 15, dan 20 menit. Dan efek dari komposisi gel silika diuji terhadap pendispersi diuji pada konsentrasi 1%, 1,4%, dan 1,8%. Membran komposit silika menghasilkan sudut kontak tertinggi dengan nilai 171,813o pada variabel waktu perendaman selama 20 menit dan komposisi gel silika sebesar 1,8%. Performa optimal dari membran komposit untuk pemisahan minyak dan air terjadi pada variabel waktu perendaman selama 15 menit dan komposisi gel silika sebesar 1,8%, yang mana memperoleh fluks permeat sebesar 276,06 L/m2.jam dan selektivitas sebesar 98,71%.

English Abstract

The current purification process of crude palm oil (CPO) in the palm oil industry is still having some disadvantages, such as a long operating time and requires higher energy inputs. Hence, an alternative method of purification is needed. Composite membranes consist of two or more of different polymers which can be used for purification process in the palm oil industry. One of the most commonly used polymers for composite membranes is silica aerogels (Aergerter, 2011). Silica aerogels mostly are not hydrophobic. Therefore, a modification process on the surface of silica aerogels to render it’s hydrophobic is needed, so it can be used for water separation on purification process. In this study, hydrophobic silica aerogels were made by waterglass as its precursor and tetraethyl orthosilicate (TEOS) as its surface modification agent. Immersion time of cotton fabric in dip-coating process were run at different times which are 5, 10, 15, and 20 minutes; and diluted silica gel were run at different concentration which are 1%, 1,4%, and 1,8% (w/w). The contact angle of the silica composite membranes reaches the highest 171,813o when the immersion time is 20 minutes and diluted silica gel concentration is 1,8%. The composite membranes’ optimal perfomance for oil-water separation occured at 15 minutes of immersion time and 1,8% concentration of diluted silica gel, which achieved permeate flux of 276,06 L/m2 .h and 98,72% water rejection. Keywords : Composite membrane, Hydrophobic, Immersion time, Silica aerogel, Silica aerogel concentratio

Other obstract

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Item Type:	Thesis (Sarjana)
Identification Number:	660
Uncontrolled Keywords:	Kata kunci : Aerogel silika, Hidrofobik, Komposisi gel silika, Membran komposit, Waktu perendaman--Composite membrane, Hydrophobic, Immersion time, Silica aerogel, Silica aerogel concentratio
Subjects:	600 Technology (Applied sciences) > 660 Chemical engineering and related technologies
Depositing User:	Unnamed user with email gaby
Date Deposited:	20 Oct 2021 09:29
Last Modified:	02 Oct 2024 01:24
URI:	http://repository.ub.ac.id/id/eprint/184371

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