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Sains Malaysiana 45(5)(2016): 817–823
Sintesis Sebatian Hidroksi-Eter Minyak Sawit Olein (Synthesis
of Palm Olein Based Hydroxy-Ether Compound)
DARFIZZI DERAWI*
& JUMAT SALIMON
Pusat Pengajian Sains
Kimia dan Teknologi Makanan, Fakulti Sains dan Teknologi
Universiti Kebangsaan
Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia
Diserahkan: 22 Januari
2014/Diterima: 25 November 2015
ABSTRAK
Sebatian
hidroksi-eter-POo (80%
hasil) disintesis melalui pembukaan gelang oksirana minyak sawit olein terepoksida
(EPOo) secara alkoholisis. Hasil
optimum pembukaan gelang oksirana (99.2%) dicapai dengan menggunakan asid
sulfurik 3% v/bt pada suhu tindak balas yang tinggi (80oC)
selama 30 minit masa tindak balas. Spektrum resonan magnetik
nukleus-proton (1H-NMR)
hidroksi-eter-POo telah
menunjukkan kehadiran puncak proton pada karbon eter (3.2, 3.5 ppm) dan proton
pada kumpulan hidroksil (4.8 ppm). Spektrum resonan
magnetik nukleus-karbon (13C-NMR)
hidroksi-eter-POo telah
menunjukkan kehadiran puncak karbon yang terikat dengan kumpulan hidroksil (75
ppm) dan karbon pada karbonil kumpulan eter (72 ppm). Kelikatan
kinematik hidroksi-eter-POo adalah
234.4 cSt (40oC)
dan 28.1 cSt (100oC) dengan indeks kelikatan 156.
Kata kunci: Alkoholisis; minyak
sawit olein terepoksida; pembukaan gelang oksirana
ABSTRACT
Hydroxy-ether-POo
(80% of yield) was synthesised through oxirane cleavage
of epoxidized palm olein (EPOo) using alcoholysis process. An optimum oxirane cleavage
has been obtained with 99.2% yield using sulphuric acid 3% v/wt
at 80oC
for 30 min. The proton-nuclear magnetic resonance (1H-NMR)
spectrum of hydroxy-ether-POo showed
the presence of proton peak attached to the carbon of ether (3.2,
3.5 ppm) and proton of hydroxy (4.8 ppm). The carbon-nuclear magnetic
resonance (13C-NMR)
spectrum of hydroxy-ether-POo showed
the presence of carbon peak bonded to hydroxyl (75 ppm) and carbonyl
carbon on ether (72 ppm). While, kinematic viscosity of hydroxy-ether-POo was
234.4 cSt (40oC)
and 28.1 cSt (100oC) with the viscosity index of
156.
Keywords: Alcoholysis; epoxidized palm olein; oxirane cleavage
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*Pengarang untuk surat-menyurat; email: darfizzi@ukm.edu.my
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