Volume 22, Issue 162 (2025)
FSCT 2025, 22(162): 156-170 |
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Mohammad Kheshtchin S, Farahmandfar R, Farmani J. Effect of ultraturrax speed on properties of grapefruit peel essential oil microencapsulated with alginate gum. FSCT 2025; 22 (162) :156-170
URL: http://fsct.modares.ac.ir/article-7-74993-en.html
URL: http://fsct.modares.ac.ir/article-7-74993-en.html
1- Department of Food Science and Technology, Sari Agricultural Sciences and Natural Resources University, Iran
2- Department of Food Science and Technology, Sari Agricultural Sciences and Natural Resources University, Iran ,re1farahmand@gmail.com
2- Department of Food Science and Technology, Sari Agricultural Sciences and Natural Resources University, Iran ,
Abstract: (93 Views)
In this study, the effect of different homogenization speed (10,000, 15,000 and 20,000 rpm) on the structural, rheological and antioxidant properties of nanoencapsulated grapefruit peel essential oil coated in alginate gum wall was investigated. Increasing the homogenization speed led to a decrease in particle size (from 264.0 to 226.9 nm) and PDI index (from 0.32 to 0.19) of nanoemulsion. All nanoemulsions had negative zeta potential (-23.6 to -21.65 mV). The nanoencapsulation efficiency of the essential oil decreased from 83.92 to 78.76% with increasing the speed of homogenization. Nanoemulsion of essential oil at 4 ° C had full stability (100%) for 5 days, while at 25 ° C over time, the stability of the nanoemulsion decreased and the highest stability was related to the prepared nanoemulsions at 15000 rpm because of a smaller zeta potential. The results of Fourier transform infrared spectroscopy and differential scanning calorimetry showed that the essential oil was encapsulated by alginate. The produced nanoemulsions had antioxidant activity and with increasing the concentration of nanoemulsions, the speed of DPPH free radical scavenging increased. The highest antioxidant activity was related to the prepared nanoemulsion at 10,000 rpm. All nanoemulsions showed pseudoplastic (shear thinning) behavior. Herschel–Bulkley and Power law models had higher R2 than other fitted models. Homogenization had almost no effect on kp and kH. The results of this study introduce the use of 15,000 rpm to produce a nanoemulsion of grapefruit peel essential oil in the alginate gum wall.
Article Type: Original Research |
Subject:
Essences and extracts
Received: 2024/05/7 | Accepted: 2024/12/11 | Published: 2025/07/23
Received: 2024/05/7 | Accepted: 2024/12/11 | Published: 2025/07/23
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