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(a)
ELP
87 °C
EHP
58 °C
ECP
25 °C
0
1
2
3
4
q [nm
-1
]
(b)
(c)
76 °C
58 °C
39 °C
25 °C
0
1
2
3
4
0
1
2
3
4
q [nm
-1
]
q [nm
-1
]
Figure 5.10
Reversibility: Scattering curves of three dispersions with different α
values: (a) 0, (b) 19, and (c) 110. The dispersions were measured during heating (black
lines), and during cooling (gray lines). The curves have been shifted by a constant
arbitrary factor for the sake of visibility. [Reprinted from de Campo et al. (2004) and
Yaghmur et al. ( 2005 ).]
The same study was also performed on oil-loaded dispersions. Figures 5.10b
and 5.10c show the scattering curves of two examples of TC-loaded dispersions
(with
110, respectively) as functions of temperature (from 25
to 76°C). Our results revealed the structural reversibility of the confi ned nano-
structures. It is worth noting that the scattering curves were identical at each
investigated temperature.
Our results indicate that the internal nanostructure in all dispersions (oil-
free and oil-loaded phases) was identical to its counterpart in the fully hydrated
bulk system. Moreover, it was, at a certain temperature, independent of the
thermal history, that is, either heating or cooling to the required temperature
gave rise to the same structure. This fact was clear evidence that the formed
nanostructures inside the kinetically stabilized particles were thermodynamic
equilibrium structures in analogy with that in the fully hydrated nondispersed
bulk phases. It is also worth noting that the emulsifi ed particles showed a water
α
=
19 and
α
=
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