Malaysian Journal of Analytical Sciences Vol 20 No 1 (2016): 157 - 170

 

 

 

PENYEDIAAN DAN PENCIRIAN HIDROGEL BERASASKAN KANJI/AKRILAMIDA DARIPADA UBI Stemona curtisii

 

(Preparation and Characterization of Starch/Acrylamide-Based Hydrogel

from Stemona curtissi Tuber)

 

Lim Wun Pin, Airul Ashri, Muntaz Abu Bakar, Wan Yaacob Wan Ahmad, Mohd Azwani Shah Mat Lazim*

 

Pusat Pengajian Sains Kimia & Teknologi Makanan,

Fakulti Sains dan Teknologi

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

 

*Corresponding author: azwanlazim@ukm.edu.my

 

 

Received: 13 July 2015; Accepted: 11 January 2016

 

 

Abstrak

Dalam kajian ini, hidrogel berasaskan kanji daripada ubi Stemona curtisii disintesis melalui kaedah pempolimeran radikal bebas menggunakan penyinaran gelombang mikro. Dalam kajian ini terdapat 3 jenis hidrogel dengan nisbah kanji kepada akrilamida yang berbeza dianalisis iaitu 1:3, 1:4 dan 5:3.  Berdasarkan kepada ujian pembengkakan, hidrogel 1:3 mempunyai peratus pembengkakan paling tinggi dan ini dibuktikan dengan keputusan yang diperolehi daripada Mikroskop Pengimbas Elektron (SEM) di mana mikrograf SEM mempamerkan saiz liang pada hidrogel 1:3 adalah yang paling besar. Analisis menggunakan Spektroskopi Inframerah Transformasi Fourier-Jumlah Pantulan Teratenuat (ATR-FTIR) menunjukkan kehadiran puncak pada 1112 cm^-1, 1152 cm^-1 dan 1150 cm^–1 pada hidrogel 1:4, 1:3 dan 5:3 masing-masing yang menandakan pembentukan ikatan C-O-C hasil daripada proses pempolimeran taut silang. Analisis menggunakan Difraktometer Sinar-X (XRD) pula menunjukkan bahawa ketiga – tiga jenis hidrogel adalah amorfus. Kalorimeter Pengimbas Kebedaan (DSC) pula memberikan maklumat bahawa semua bahan yang digunakan untuk sintesis hidrogel adalah pada tahap kebolehcampuran yang baik dan hidrogel 1:4 menunjukkan suhu peralihan kaca (T_g) yang paling tinggi. Daripada termogram TGA/DTG pula, hidrogel 5:3 didapati lebih stabil terhadap haba berbanding hidrogel yang lain. Keputusan ujian Tegangan menggunakan Mesin Ujian Universal (UTM) telah mendapati bahawa hidrogel berasaskan kanji Ubi Stemona curtisii yang disintesis mempunyai potensi untuk diaplikasikan sebagai pembalut luka. Dalam ujian ini, hidrogel 1:4 yang mempunyai kandungan kanji yang paling rendah telah menunjukkan nilai modulus elastik Young yang paling tinggi.

 

Kata kunci: Stemona curtisii, hidrogel, pempolimeran radikal bebas, gelombang mikro

 

Abstract

In this study, hydrogel based on starch of Stemona curtisii was synthesized via free radical polymerization method by using microwave irradiation. In this study, there were three type of hydrogels formulated with different type of starch to acryamide been anaylyzed which were 1:3, 1:4 and 5:3. Based on swelling test, hydrogel with 1:3 was reported to have the highest swelling percentage where this is prove by Scanning Electron Microscope result. The SEM micrograph shows that hydrogel 1:3 have the largest pores size compare to the other two types of hydrogels. The polymerization reaction has been proven to occur successfully based on the analysis using Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR). Cross-linking polymerization process was determine by the present of peak at  1112 cm^-1, 1152 cm^-1 and 1150 cm^–1 in  hydrogels 1:4, 1:3 and 5:3 respectively which indicate the formation of C-O-C bond.X-Ray Diffractometer (XRD) results showed that all starch-based hydrogels were amorphous.  Differential Scanning Calorimeter (DSC) gave information that all the blending materials for hydrogel synthesis were of good miscibility and the hydrogel 1:4 was found to have the highest glass transition temperature. From the TGA/DTG thermogram, hydrogel 5:3 was reported to be more stable to heat as compared to other hydrogels. The results from Tensile test using Universal Testing Machine (UTM) have discovered that hydrogels based on the starch of Stemona curtisii possess a potential to be applied as wound dressing. In this test, hydrogel with the lowest starch content, 1:4 showed the highest Young’s elastic modulus value.

 

Keywords: Stemona curtisii, hydrogel, free radical polymerization, microwave

 

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