3.1.2. Particle size distribution
Fig.3. shows the droplet size distribution of ultrasonic-treaded husk emulsion gel with different inulin concentration.
(Place for figure 3)
Fig. 3. Particle size analysis of ultrasonic-treated 3% psyllium husk emulsion gel with different concentration of inulin.
The particle size analysis of the emulsion gel system indicated one sharp peak that shifted progressively to the left towards smaller droplet size with increase in inulin concentration (Fig. 3). The result revealed that emulsion droplets were more uniformly distributed, and the number of smaller droplets kept increasing in the emulsion gels. Reduction of droplet size may be due to increased polysaccharide concentration resulting in stronger and more compact gel-network, which entrapped emulsion oil droplets and reduced droplet aggregation (Xu et al., 2020). In addition, inulin was available to wrap the oil droplet surface which limited the movement of emulsion droplets and prevented their aggregation, resulting in smaller oil droplets and more stable emulsion (Sarkar et al., 2018; Hu et al., 2020). These results were further confirmed by PLM and SEM image.