02729ntm a2200349 i 4500 MY-KuUP 20260811103926.0 t|||||r|||| 000 0 ta 260811t20252025my a|||fr|||| 000 0 eng d THE0010945 (Local) Hardback UMPSA eng UMPSA rda FTKKP .Y44 2025 r Bc. Low, Yee Sinn, author. Formulation of nanoemulsified food preservative: effect of different concentration of essential oil / Low Yee Sinn Kuantan, Pahang : UMPSA, 2025 © 2025 xi, 50 pages : illustrations ; rdacontent text rdamedia unmediated rdacarrier volume rda text file PDF Faculty of Chemical and Process Engineering Technology Final Year Report (Bachelor of Chemical Engineering Technology (Hons) ) -- Universiti Malaysia Pahang Al-Sultan Abdullah - 2025 Include bibliographical reference Nanoemulsions are described as particles of insoluble liquid phases in which tiny droplets of one liquid diffuse throughout the other. Essential oil based nanoemulsion is utilized for food preservation techniques, especially for fresh fruits and vegetables with the aim to expand the shelf life and maintain the texture. The objective of this study is to formulate essential oil nanoemulsion using different concentrations of essential oil with fix concentration of 1% w/v chitosan as polysaccharide. Two different types of essential oil were used, lemon and clove essential oil. Concentration of each essential oil varied at 0.5%, 1.0% and 1.5% respectively. Hot plate magnetic stirrer, homogenizer and ultrasonic processor were used for the formulation of nanoemulsion. Particle size analyzer, Fourier Transform Infra-Red Spectroscopy (FTIR), pH meter was used to observe the characterization of nanoemulsions. The stability study of nanoemulsion was conducted for 30days. The result showed that both CEO and LEO nanoemulsions maintained slightly acidic pH value. FTIR analysis confirmed the presence of (O-H, CH, C=C, C-O) in both LEO and CEO nanoemulsions, supporting their biological activity. At 0.5% v/v, LEO nanoemulsions demonstrated better stability with particle sizes between 458.3 nm and 547.4 nm. CEO nanoemulsions exhibited instability with larger droplet size (up to 7300 nm) and significant phase separation. Faculty of Chemical and Process Engineering Technology Dissertations Universities and colleges Dissertations Theses Dissertations https://umpir.ump.edu.my/id/eprint/47771 lcc PSM 0 0 lcc 0 0 10000 10000 2026-08-11 0 FTKKP .Y44 2025 r Bc. T000004382 2026-08-11 10:40:13 2026-08-11 PSM 105444 105450