Environmental Engineering Reference
In-Depth Information
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0 0
100
150
200
250
300
350
400
450
500
Time (min)
FIGURE 2.25
Release kinetics of a colored inorganic complex
Ru bpy
(
)
2+
)
from a PNIPAM hydrogel.
(
2500
2000
1500
1000
500
0
20
30
40
50
60
Temperature (°C)
FIGURE 2.26
Change of concentration of a probe dye (Direct Red 75) in the surrounding solution of a thermosensitive
P N I PA M h y d r o g e l .
thermosensitive hydrogel driven by a temperature change. The transition temperature (
T
tr
)
can be changed by introducing hydrophilic (e.g.,
−
−
SO
3
, increased
T
tr
) or hydrophobic (e.g.,
-CH(CH
3
)
2
, decreased
T
tr
) groups in the polymer chains [181]. Therefore, the release trigger
temperature can be tailored to some temperature relevant to the aquatic organism (e.g., ish).
Since it was shown that it is possible to fabricate hydrogel microparticles, the delivery
material could be mixed with food to be taken by aquaculture organisms.
2.5 What Future Actions Can Be Taken to Develop Aquananotechnology?
On the basis of the porous materials and nanoparticles already developed, it is possible to
plan future actions to further develop aquananotechnology.
