Biomedical Engineering Reference
In-Depth Information
10+90
2005
20+80
1907
30+70
1854
40+60
1701
50+50
1589
60+40
1498
70+30
1245
80+20
1087
90+10
987
95+05
843
10:90
2654
30:70
2324
50:50
1456
70:30
1213
90:10
877
Table 9.4 represents OTR (Oxygen Transmission Rate) values for all
the ten ratio films. Generally, hydrophilic polymeric films have shown
good oxygen barrier property. As it can be observed there was an improve-
ment in oxygen barrier properties of the films as the percentage of modi-
fied cellulose increases. It was observed that there is a great decrease in
oxygen transmission rate as the percentage composition of the modified
cellulose increases. It is obvious that modified cellulose played a powerful
role in improving the oxygen gas barrier properties. The increased mo-
lecular interaction resulted in a film with compact structure and low OTR
value. Oxygen Transmission Rate increases as the percentage of modified
cellulose decreases because intermolecular bonding between fiber and ma-
trix decreases. This resulted in a phase separation among the main com-
ponents where the film could not be formed well, facilitating the oxygen
permeation. So it was more advantageous to improving the gas barrier
properties by increasing the percentage of modified cellulose. This result
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