Litreview about Chitosan aerogels 1.ppt

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1. Literature Review:
Synthesis and Characterizations of Chitosan Aerogels
2023

2. Outline
What is Chitin and Chitosan?
Chitin in nature
Physical properties
Selected Applications of chitin and chitosan
Applications of Chitosan aerogels
Synthesis of chitosan aerogels
Results and discussion

3. Chitin in Nature
Exoskeletons of arthropods
Spines of diatoms
Cell walls of fungi, mold, yeast
Shells of mollusks
Other invertebrate animals

4. What is Chitin and Chitosan?
Chitin is a natural polysaccharide
The 2
nd
abundant organic source on earth
Structure similar to cellulose with hydroxyl group
replaced by acetamido group
N-acetyl-glucosamine units in β-(1→4) linkage
Chitosan is the N-deacetylated derivative of chitin
N-glucosamine units in β-(1→4) linkage
N-deacetylation of chitin into chitosan is achieved
by treating with 50% NaOH
Structure of Chitin, Chitosan, and Cellulose
[1]
Images of Chitin molecules
[2]
[1] Kohr E. Chitin: fulfilling a biomaterials promise. Elsevier Science, 2001
[2] http://invsee.asu.edu/Modules/yeast/structure.htm
1
2
3
4
5
6
4
6
3
2
1
5

5. Physical properties
Mechanical Properties
•Optical properties

6. Applications of chitin and chitosan
[1] Goosen M. in Applications of Chitinand Chitosan. Technomic Publishing Inc, PA. 1997
Table. Applications of chitin, chitosan and their derivatives
[1]
Chitosan soap, lotion, shampoo
http://www.conybio.com.my/galleries.html
ChitoSan
®
fibers and chitin socks
http://cd.tradehelper.or.kr/
Crini G. Progress in Polymer Science, 30 (2005) 38
Fungicide seed coating
http://www.une.edu.au/agronomy/past
ures/research/pastureresearc.htm
http://matsyafed.org/img/chi.jpg

7. Applications of chitosan aerogels
Biomedical Applications
Catalysis
Thermal Insulation

8. Synthesis of chitosan aerogels
•First step Synthesis of
chitosan gels
picture of chitosan gel.
The next step is the process of
making chitosan aerogels
freeze drying method

9. Results and discussion
Physical properties
Flexibility of chitosan aerogel

10. FTIR analysis
4000350030002500200015001000500
T
r
a
n
s
m
it
a
n
c
e

(
%
)
Wavenumber (cm
-1
)
Chitosan-FTIR spectra
FTIR spectra of chitosan
aerogel.

11. Adsorption capacity of antibiotic
The adsorption capacity of antibiotic
Azithromycin (AZM) with time.
0 10 20 30 40 50 60
180
200
220
240
260
280
300
320
Q
t
(
m
g
/
g
)
Time (min)

12. Conclusion

13. Thanks