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[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019 Trans Tech Publications Ltd, Switzerland.Starch-based hydrogels are biodegradable and biocompatible materials which have large surface area and are able to absorb a large amount of water. Hydrogels can be made of inclusion complexes between starch and hydrophobic guest molecules, such as starch-oleic acid complexes. The resulting hydrogels have advantages as the inclusion complexes can prevent the starch retrogradation in the hydrogel. For this purpose, inclusion complexes between starch and oleic acid were prepared by mixing cassava starch and oleic acid at 85 °C with varying complexation times (1 hour, 2 hours and 5 hours). Optimum result (product yield ∼67%) was obtained by heating the reaction for 5 hours at 85 °C. In addition, the concentrations of oleic acid for complexation were varied at 10%, 20% and 50% (v/w) (calculated based on the weight of starch). The results showed that the maximum amount of oleic acid which could be complexed with starch was around 10% (v/w). The resulting products were characterized by Fourier Transform Infra Red (FTIR) spectroscopy, X-Ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM). FTIR results of the complexes showed vibration peaks at around 3600-3000 cm-1 (-OH), 2900-2800 cm-1 (-CH2), 1300-1200 cm-1 (C-O-C glycosidic bonds) and 1100-1000 cm-1 (C-C and C-O). The XRD results showed that the resulting complexes were crystalline and constructed of V6-amylose, which was evidenced by the appearance of peaks at 2θ of 13.06° and 20.38°. Some complexes also showed interesting diffractions at 2θ of 17.07° and 30.26°. TGA results showed that the complexes started to decompose at either around 277 °C or 285 °C compared to starch which started to decompose at around 303 °C. SEM studies showed that the resulting complexes formed spheres with concave centers close to the shape of doughnuts. The complexes offered great potential to be applied as hydrogel materials, such as round hydrogels with initial average diameters of around 2.6 mm and 8.3 mm.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Average diameter,Fourier transform infra red (FTIR) spectroscopy,Glycosidic bond,Hydrophobic guests,Inclusion complex,Large surface area,Starch retrogradation,Starch-based hydrogel[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Hydrogels,Inclusion complexes,Oleic acid,Starch[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This research was supported by the ITB research grant (project number 6431/I1.B04/PL/2016).[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.4028/www.scientific.net/KEM.811.8[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]