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Sains Malaysiana 48(7)(2019):
1519–1527
http://dx.doi.org/10.17576/jsm-2019-4807-21
Kesan Penambahan
Magnesia dan Zirkonia terhadap Sifat Kebioaktifan dan Kekuatan Mampatan β-Wolastonit
yang Disintesis daripada Kulit Telur
(The Effects of
Magnesia and Zirconia Addition on Bioactivity and Compressive Strength
Properties of β-Wollastonite Synthesized from Eggshells)
HAMISAH ISMAIL*, NURUL FITRAH MOHD
FADZIL, ROSLINDA SHAMSUDIN & MUHAMMAD AZMI ABDUL HAMID
Pusat
Sains Terkehadapan, Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia,
43600 UKM Bangi, Selangor Darul Ehsan, Malaysia
Diserahkan:
21 September 2018/Diterima: 11 April 2019
ABSTRAK
Penyelidikan ini
mengkaji kesan penambahan magnesia (MgO) dan zirkonia (ZrO2)
terhadap sifat kebioaktifan dan kekuatan mampatan β-wolastonit. Kalsium
oksida (CaO) yang diperoleh daripada kulit telur dan silika (SiO2)
yang diperoleh daripada abu sekam padi dicampur menggunakan nisbah CaO:SiO2 sebanyak
45:55 dengan air ternyah ion dan dimasukkan ke dalam autoklaf pada suhu 135°C
selama 8 jam untuk menghasilkan β-wolastonit. Komposisi yang digunakan di
dalam kajian ini adalah 90 hingga 95 % bt. β-wolastonit, dengan 5 hingga
10 % bt. MgO dan 5 hingga 10 % bt. ZrO2. Perubahan fasa, morfologi,
unsur dan pH bagi setiap komposisi sampel sepanjang ujian kebioaktifan selama 7
hari dikaji dan dijelaskan menggunakan XRD, SEM/EDX dan
pH. Selepas 7 hari rendaman, kesemua sampel, iaitu 100 % bt. β-wolastonit,
90 % bt. β-wolastonit-10 % bt. MgO, 90 % bt. β-wolastonit-10 % bt.
ZrO2, dan 90 % bt. β-wolastonit-5 % bt. MgO-5 % bt. ZrO2 menunjukkan
penurunan puncak fasa β-wolastonit (β-CaSiO3)
dan didapati puncak fasa hidroksiapatit (HA) turut dikesan. Morfologi
kesemua sampel berubah daripada gugusan berbentuk sfera pada hari pertama
rendaman hingga membentuk suatu lapisan nipis kekaca iaitu amorfus kalsium
fosfat (ACP) pada hari ke-7 rendaman. Sampel β-wolastonit
dengan 5 % bt. MgO - 5 % bt. ZrO2 menunjukkan kekuatan mampatan
terbaik berbanding komposisi lain. Sampel β-wolastonit dengan 5 % bt. MgO
- 5 % bt. ZrO2 didapati sesuai untuk dijadikan bahan alternatif
pengganti tulang kerana bersifat bioaktif dan memiliki kekuatan mampatan yang
baik.
Kata kunci:
β-wolastonit; kebioaktifan; kulit telur; magnesia; zirconia
ABSTRACT
This study examines the
effects of magnesia (MgO) and zirconia (ZrO2)
addition on the bioactivity and compressive strength properties of
β-wollastonite. Calcium oxide (CaO) that was obtained from egg shells and
silica (SiO2) that was obtained from rice husk ash were mixed using
a CaO:SiO2 ratio of 45:55 with deionized water and put into an
autoclave at 135°C for 8 h to produce β-wollastonite. The compositions
used in this study were 90 to 95 wt. % of β-wollastonite, with 5 to 10 wt.
% of MgO and ZrO2. Phase, morphological, elemental,
and pH changes for each composition during the 7 day bioactivity test were
reviewed and explained using XRD, SEM/EDX,
and pH. After 7 days of immersion, all samples, namely, 100 wt. % β-wollastonite,
90 wt. % β-wollastonite-10 wt. % MgO, 90 wt. % β-wollastonite-10 wt.
% ZrO2, and 90 wt. % β-wollastonite-5 wt. %-MgO-5 wt. %
ZrO2 showed decreasing peaks of the β-wollastonite
(β-CaSiO3) and found that hydroxyapatite (HA)
phase peak was also detected. The morphology of all the samples had evolved
from a spherical form on the first day of the immersion to a glassy thin layer
of amorphous calcium phosphate (ACP) on the seventh day of
soaking. β-wollastonite samples with 5 wt. % MgO-5 wt. % ZrO2 showed
the best compression strength compared to other composites. β-wollastonite
samples with 5 wt. % MgO - 5 wt. % ZrO2 were found to be suitable as
alternative substances for bone replacement because they are bioactive and have
good compression strength.
Keywords: β-wollastonite; bioactivity; egg shell; magnesia;
zirconia
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*Pengarang
untuk surat-menyurat; email: hamisahismail@ yahoo.com
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