Chemistry Reference
In-Depth Information
was increased and found to increase with MMA content, pesticide concentration,
and temperature increase [
92
].
7.5.3 Metal Ion Sorption
Heavy metal ion sorption is an important application of polysaccharide hydrogels.
Psyllium husk and acrylic acid-based polymeric networks using
N
,
N
0
-methylene
bis-acrylamide as cross-linker were studied for removal, separation, and enrichment
of hazardous metal ions from aqueous solution [
93
]. Polymer networks based on
cellulose and its derivatives like hydroxypropyl cellulose, cyanoethyl cellulose,
hydroxyethyl cellulose, hydrazinodeoxy cellulose, cellulose phosphate with acryl-
amide, and
N
,
N
0
-methylene bis-acrylamide were studied for sorption of Fe
2+
,Cu
2+
,
and Cr
2+
ions [
94
]. Hydrophilic hydrogels based on poly(acrylic acid) and sodium
alginate prepared through gamma radiation method showed affinity towards the
metal sorption of Cu
2+
,Co
2+
, and Ni
2+
ion [
95
].
7.6 Conclusion
Polysaccharide-based hydrogels are biodegradable and eco-friendly materials
which exhibit promising applications in different fields. Moreover, their availability
from natural resources and low cost make them more attractive smart polymeric
materials. Innovative hydrogel products have thus been developed as personal
hygiene products, underwater devices, water reservoirs for dry soils, and biomedi-
cal devices, including soft contact lenses, lubricating surface coatings, phantoms
for ultrasound-based imaging, controlled drug release devices, wound healing
dressings, and bioactive scaffolds for regenerative medicines.
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3. Kaith BS, Jindal R, Mittal H (2010) Superabsorbent hydrogels from poly(acrylamide-co-
acrylonitrile) grafted Gum ghatti with salt, pH and temperature responsive properties. Der
Chemica Sinica 1:92-103
4. Kaith BS, Ranjta S (2010) Synthesis of pH—thermosensitive gum arabic based hydrogel and
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24:28-37
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