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Sains Malaysiana 46(12)(2017): 2469–2475 http://dx.doi.org/10.17576/jsm-2017-4612-24
Pengoptimuman Tindak
Balas Penghidrogenan
Getah Asli Cecair
melalui Kaedah
Rangsangan Permukaan (Liquid Natural Rubber Hydrogenation Optimization
Reaction through Response Surface Methods) FAZIRA FIRDAUS1,
NUR
HANIS
ADILA
AZHAR1,
MOHAMAD
SHAHRUL
FIZREE
IDRIS1
& SITI
FAIRUS
M.
YUSOFF1,2* 1Pusat Pengajian
Sains Kimia dan
Teknologi Makanan, Fakulti Sains dan
Teknologi, Universiti Kebangsaan Malaysia, 43600 UKM
Bangi, Selangor Darul Ehsan, Malaysia 2Polymer Research Centre (PORCE),
Fakulti Sains dan
Teknologi, Universiti
Kebangsaan Malaysia 43600
UKM Bangi, Selangor Darul Ehsan, Malaysia Diserahkan: 2 Jun 2017/Diterima:
24 Oktober 2017 ABSTRAK Pengoptimuman parameter
kajian menggunakan
rangsangan permukaan
(RSM)
merupakan kaedah
yang dijangka dapat membantu penjimatan masa dan kos
tindak balas keseluruhan
jika dibandingkan
dengan kaedah pengoptimuman
secara tradisi.
Dalam kajian ini, kaedah
RSM
digunakan untuk
mengoptimumkan parameter tindak
balas penghidrogenan
LNR
menggunakan sumber diimida daripada termolisis p-toluenasulfonil hidrazida (TSH) dalam
pelarut o-xilena.
Reka bentuk komposit
putaran tengah
(CCRD)
menggunakan RSM digunakan
dengan 3 parameter iaitu
nisbah berat TSH: LNR,
suhu dan
masa tindak balas. Melalui reka
bentuk ini,
model kuadratik untuk peratusan penghidrogenan berjaya diperoleh. Model kuadratik ini
adalah signifikan
dengan pekali kolerasi
iaitu 0.9177. Berdasarkan
data ANOVA yang diperoleh, masa dan suhu tindak
balas memberi
kesan yang signifikan terhadap peratus penghidrogenan getah asli cecair berbanding
faktor nisbah
berat TSH: LNR. Keadaan
optimum bagi tindak
balas penghidrogenan ini adalah pada
nisbah berat
TSH:
LNR, 1.41, masa tindak
balas 2.22 jam dan suhu tindak balas
114.05°C dengan peratus
penghidrogenan 81.83%. Penggunaan RSM dalam penghasilan HLNR memudahkan kajian dalam memberikan keputusan dengan peratusan penghidrogenan yang dikehendaki menggunakan persamaan polinomial kuadratik yang diperoleh.
Kata kunci:
Getah asli
cecair (LNR); getah
asli cecair
terhidrogen (HLNR); kaedah
rangsangan permukaan
(RSM);
reka bentuk
komposit putaran tengah (CCRD); o-xilena ABSTRACT Optimization of research parameter
using response surface methods (RSM)
is expected to help save the overall time and cost of the reaction
compared to traditional method of optimization. In this research,
RSM is
used for optimization of hydrogenation of LNR using
diimide source from thermolysis
of p-toluenesulfonyl hydrazide (TSH)
in o-xylene solvent. Central composite rotatable design (CCRD)
using RSM with 3 factors which are weight ratio TSH: LNR,
reaction time and reaction temperature. Using this design, quadratic
model for percentage of hydrogenation was obtained. This quadratic
model was significant to the correlation coefficient of 0.9177.
Based on ANOVA,
the reaction time and reaction temperature were more significant
on the percentage of hydrogenation of LNR compared to the weight ratio
TSH: LNR. The optimum condition of the hydrogenation reaction
was obtained at 1.41 weight ratio of TSH: LNR,
reaction time of 2.22 h and reaction temperature of 114.05°C
with 81.83% of hydrogenation. The use of RSM in HLNR preparation
assist in the production of desired hydrogenation percentage
based on the quadratic polynomial equation obtained. Keywords: Central composite rotatable design (CCRD);
hydrogenated liquid natural rubber (HLNR); liquid
natural rubber (LNR); o-xylene; response
surface methods (RSM) RUJUKAN
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