Isolation of starch from acha grain (Digitaria exilis (Kippist) Stapf), modification, characterization and application of benzoylated starch in stabilization of oil in water emulsion

• Authors: Morenikeji Abidemi Ajayi , Olayide Samuel Lawal , Ekpoanwan Alfred Bassey , Opeyemi Morakinyo Oyebanji , Clinton Tochukwu Onyemerem , Priscillia Oluchukwu Ikeri , Salvation Izuchukwu Peters , Daberechi Blessing Mounford
• Languages of publication: EN

Abstracts

EN

Starch and its derivatives are biocompatible, biodegradable, non-toxic with applications in food, pharmaceutical and allied industries. In this study, starch was isolated from acha grain (Digitaria exilis (Kippist) Stapf). Esterification of starch was carried out using benzoyl chloride at room temperature (30 °C ± 2 °C). Characterization of native and benzoylated starch were achieved by FT-IR and XRD analyses. Emulsifying properties of native and benzoylated starch were reported. FT-IR spectra of native modified revealed the broad absorption bands at 3375.70 cm-1 was due to stretching hydrogen bonded O-H groups in the starch. However, for the modified starch, the major new absorption bands at 1600.92 cm-1 which is associated with C=O esters indicating the modification of the native starch confirms that esterification took place in the starch molecules and the band in the region 1716.65 cm-1 confirms the water adsorption. The X-Ray diffraction pattern of native and acetylated starch samples prominent peaks (2) at 18.08 and 19.02 respectively. After acetylation, slightly reduction in crystallinity was observed. The loss of crystallinity would mean enhanced ability for acetylation starch or other polymer products made from it to absorb water. The native and benzylated starch significantly enhanced the stability of water of oil water emulsion.

Keywords

EN

Digitaria exilis; Starch; acetylation; biodegrable; modification

Discipline

• BIOCHEMISTRY: BIOCHEMISTRY

• Publisher: Scientific Publishing House „DARWIN”
• Journal: World News of Natural Sciences
• Year: 2025
• Volume: 58
• Pages: 194-208

Contributors

author

Morenikeji Abidemi Ajayi

• Department of Chemistry, Faculty of Science, Federal University Oye Ekiti, Oye-Ekiti, Nigeria

author

Olayide Samuel Lawal

• Department of Chemistry, Faculty of Science, Federal University Oye Ekiti, Oye-Ekiti, Nigeria

author

Ekpoanwan Alfred Bassey

• Department of Environmental Education, Faculty of Education, University of Calabar, Calabar, Cross River State, Nigeria

author

Opeyemi Morakinyo Oyebanji

• Department of Industrial Chemistry, Faculty of Science, University of Ilorin, Ilorin, Kwara State, Nigeria

author

Clinton Tochukwu Onyemerem

• Department of Petroleum Engineering Technology, School of Engineering and Engineering Technology, Federal University of Technology, Owerri, Imo State, Nigeria

author

Priscillia Oluchukwu Ikeri

• Department of Science and Technology, Faculty of Education, University of Lagos, Yaba, Lagos State, Nigeria

author

Salvation Izuchukwu Peters

• Department of Human Nutrition and Dietetics, Faculty of Basic Medical Sciences, University of Calabar, Calabar, Cross River State, Nigeria

author

Daberechi Blessing Mounford

• Department of Agricultural and Bio Resources Engineering, College of Engineering Technology, Michael Okpara University of Agriculture, Umudike, Nigeria

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• Document Type: article