Malaysian Journal of Analytical
Sciences Vol 21 No 5 (2017): 1111 - 1119
DOI:
https://doi.org/10.17576/mjas-2017-2105-13
SINTESIS
DAN PENCIRIAN HIDROGEL TERBIODEGRADASI BERASASKAN BAKTERIA SELULOSA MENGGUNAKAN
TEKNIK
RADIASI ULTRA LEMBAYUNG
(Synthesis and Characterization of Biodegradable
Bacterial Cellulose Based Hydrogels Using Ultra Violet Curable Radiation)
Norhanisah
Jamaludin dan Azwan Mat Lazim*
Pusat
Pengajian Sains Kimia dan Teknolohi Makanan,
Fakulti
Sains dan Teknologi,
Universiti
Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
*Corresponding author: azwanlazim@ukm.edu.my
Received: 16
January 2017; Accepted: 16 July 2017
Abstrak
Hidrogel terbiodegradasi berasaskan selulosa bakteria (BC) daripada nata de coco dihasilkan melalui proses
radiasi ultra lembayung terawat. Selulosa bakteria (BC) telah digabungkan
bersama akrilamida (AM) pada nisbah yang berbeza. N,N-metilena bisakrilamida
(BIS) dan kalium persulfat (KPS) kemudiannya ditambah untuk mensintesis
hidrogel dengan nisbah 5% w/v (hidrogel A) dan 10% w/v (hidrogel B). Hidrogel
berasaskan AM juga turut disintesis dengan label hidrogel pemalar. Dalam kajian ini, akrilamida (AM) bertindak sebagai monomer dan terikat
pada struktur tulang belakang selulosa. Kalium persulfat (KPS) bertindak
sebagai bahan pemula cahaya di mana ianya membantu dalam menghasilkan radikal
bebas dan N,N-metilena bisakrilamida (BIS) pula berfungsi sebagai agen pentaut
silang. Berdasarkan penggunaan teknik
radiasi dan bahan pemula cahaya, tindak balas yang terlibat adalah pempolimeran
radikal bebas. Lima analisis telah dilakukan bagi mencirikan hidrogel A dan B
iaitu ujian pengembangan menggunakan lima larutan penimbal pH, analisis
struktur kimia, analisis gravimetri termal (TGA), analisis kalorimetri
pengimbasan pembezaan (DSC) dan analisis pembelauan sinar-X. Morfologi
permukaan bagi kedua – dua hidrogel A dan B juga telah ditentukan menggunakan
analisis mikroskopi pengimbasan elektron (SEM). Hasil analisis telah menunjukkan kewujudan liang – liang terbuka dalam
hidrogel A adalah lebih banyak berbanding dengan hidrogel B.
Kata kunci: hidrogel, selulosa bakteria, ultra lembayung terawat
Abstract
A rapid biodegradable
hydrogel made up of bacterial cellulose (BC) from nata
de coco was prepared by curing it under the ultra violet
(UV) radiation. Bacterial cellulose (BC) is grafted with acrylamide (AM) at
different proportions. Potassium persulphate (KPS) and N,N-methylene
bisacrylamide (BIS) are added to synthesize hydrogels at the ratio of 5% w/v
(hydrogel A) and 10% w/v (hydrogel B). Acrylamide hydrogel is also synthesized
as a control hydrogel. In this research, acrylamide acts as a monomer that
binds itself to the cellulose backbone while potassium persulfate (KPS) as an
intiator where it produces free radicals. The N,N-methylene bisacrylamide (BIS)
is used as a cross linker. Here, free radical polymerization is involved.
Several analyses have been done to characterise hydrogel A and B which are
swelling test in five different buffer solutions, chemical structure analysis, thermal
gravimetry analysis (TGA), diffrential scanning calorimetry (DSC) and X-ray
diffraction (XRD). The surface morphology for both hydrogel A and B are also
determined by using scanning electron microscopy (SEM) analysis. The images
found that the pores in hydrogel A were more than in hydrogel B.
Keywords: hydrogel, bacterial cellulose, curable ultra violet
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