Particle and Aerosol Research
Vol. 13, No. 3, September 2017, Pages 133-139
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ISSN : 1738-8716 (Print)
ISSN : 2287-8130 (Online)
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Effect of oil particle size on dispersion stability in oil in water emulsion
Sunae Hwangbo1),2), Minchul Chu2), Changkwan Moon1)*
1)Department of Materials Science and Engineering, Pukyong National University
2)Korea Research Institute of Standards and Science
*Corresponding author.
Tel.: +82-51-629-6356, E-mail: moonck@pknu.ac.kr
Received 10 July 2017, Revised 01 September 2017, Accepted 06 September 2017, Available online 30 September 2017
http://dx.doi.org/10.11629/jpaar.2017.9.30.133
Abstracts
Abstract
In this paper, we proposed an emulsification method without using an emulsifier and investigated the effects of particle size distribution in fluids on dispersion stability. Surfactant-free oil in water emulsion was prepared with 1 % (w/w) of olive oil by using high speed agitation, high pressure and ultrasonic dispersion methods. The particle size, microscopic observation, and dispersion stability of each sample were evaluated and dispersion stability according to various dispersion methods was compared. As a result, the emulsion dispersed by the ultrasonic dispersion method showed the smallest particle size and uniform distribution of 0.07 ~ 0.3 § and was the most stable in a 7 days stability evaluation. In the above experiment, four olive oil emulsions having different particle sizes were prepared using ultrasonic dispersion technology that was capable of producing stable emulsions. The dispersion stability of each samples with oil droplet sizes of (A) 0.1 to 0.5 §, (B) 0.3 to 4 §, (C) 1 to 10.5 § and (D) 2 to 120 §, was observed for 7 days, and the relationship between the stability and performance was studied. Emulsion (A) with particle size less than 0.5 § displayed the dispersion stability showing below 5 % change in a 7 days stability evaluation. In the case of (B), (C), and (D) that had larger particle than 0.5 ¥ìm, the changes of dispersion stability were 10 %, 13 % and 35 % respectively. From these results, it was proved that dispersion stability of emulsion with uniform particle size of 0.5 § or less was confirmed to be very stable.
Keywords
Nano-Emulsion, Nano particle, Surfactant Free Nano Emulsion(SFNE), Focused ultrasound wave
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