Effects of oil contents on the physical and microstructural characteristics of ice cream

Mohamed Makki, Muhammad Muhsin (2020) Effects of oil contents on the physical and microstructural characteristics of ice cream. [Project Paper] (Submitted)

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Abstract

Observing the microstructure of ice cream is very crucial in order to understand the properties and behavior of ice cream. Recently, various technological devices have been introduced for the purpose of studying the microstructure which will eventually improve the quality of ice cream. However, most devices used in observing the microstructure of ice cream are very expensive and limited. This study was conducted to observe the effects of different percentage of oil contents on the physicals and microstructural characteristics of ice cream. The system was set up inside a freezer with surrounding temperature of -21 degrees C and direct observation of ice cream sample was done using Dino-Lite microscope at fixed magnification of 500x. Preparation of ice cream samples were manipulated by mixing different percentage ofpalm oil which were 0% (control sample), 4%, 5% and 6%. Melting rate, overrun and firmness of each hardened ice cream were measured and correlated with the structural attribute. Results showed that different percentages of oil content in ice cream affected the microstructure of ice cream i.e. the air cells, ice crystals and fat globules. It was observed that ice cream with higher percentage of oil content had smaller air cells and ice crystals sizes with fat globules were clearly visible. The melting rate decreased from 1.82g/min to 1.66g/min, while overrun decreased from 55 .12% to 33 .38% as the percentage of oil content increased. However, the firmness showed inconsistent trend where highest value recorded was 116.6N (control) and lowest value was 108.4N (5% oil). Overall, images of microstructure of ice cream were successfully obtained using the device developed and the physical properties were well correlated.

Item Type:	Project Paper
Subjects:	T Technology > TP Chemical technology
Faculty:	Faculty of Engineering
Depositing User:	Ms. AZLINA ZAINAL ABIDIN
Date Deposited:	03 Nov 2025 07:54
Last Modified:	26 Nov 2025 08:15
URI:	http://psaspb.upm.edu.my/id/eprint/2585

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