Introduction

What is double emulsion?

Where we can apply Double Emulsion?

Experimental work

Results and discussion

Conclusion

An emulsion is a mixture of two immiscible

phases of which one (i .e. oil) is dispersed

in another (i.e. water) which is stabilized

by a surfactant.

Single emulsion

Traditional method

1) pressure Homogenizer

2) Colloid mill

3) Mechanical strring+

/ /

Materials

NaCl+ water

Water+NaCl

+

Solution preparation

mixing

+

/

Water+sugar+t

ween 80

mixing

w/o/w

DE

Test sample

NaCl release test

Viscosity test

Density test

Particle size test

y = 6E-06x - 0.0004

R² = 0.9809

0

0.001

0.002

0.003

0.004

0.005

0.006

0.007

0 200 400 600 800 1000 1200

co

nc

cond

Effects on droplets’

Size

Effects

on NaCl release

How to combine all previous parameter in

one??

Re

*v*dp

0

0.2

0.4

0.6

0.8

1

1.2

0 0.02 0.04 0.06 0.08 0.1 0.12 0.14

d/d

p

Re

conc glucose

pressure glucose

conc fructose

pressure fructose

Decreasing fructose pressure

Increasing glucose pressure

Decreasing glucose and fructose

conc.

Many methods are used to get double

emulsion with premix membrane

emulsification as the best one.

Three different types of continuous phase

were used with different concentrations.

Fructose gave the best results and it was

the most stable one.

All the studied parameters were combined

in one dimensionless relation.

Less than 1micron in diameter was

obtained in this study in which it is the

smallest size obtained in the literature

Take home message

Thank you ^_^