Water resistance
Water resistance properties, determined by WS, SR, and
WVUR, of agar and agar/clay nanocomposite films are shown
in Table 6.
After formation of nanocomposite, agar/Cloisite Na+
nanocomposite films showed a significantly increase in theWS and
SR, while the WVUR did not show any significant change.
On
the contrary, the SR and WVUR decreased significantly in both agar/Cloisite 30B and 20A nanocomposite films, while the WS did not change significantly.
The increase in the WS and SRR of
agar/Cloisite Na+ nanocomposite films may be attributed to the
hydrophilic nature of the Cloisite Na+, while hydrophobicity of
organoclays caused decrease in the SR and WVUR of the resulting
nanocomposite films.
It is noteworthy that the agar/Cloisite
Na+ nanocomposite film has a high water holding capacity (high
SR) with increased mechanical strength and moderate flexibility,
which is a desirable properties for the utilization as a hydrogel
(Farris and others 2009).
Table 3–Surface roughness of the agar and agar nanocomposite
films determined by AFM.1
Water resistanceWater resistance properties, determined by WS, SR, andWVUR, of agar and agar/clay nanocomposite films are shownin Table 6. After formation of nanocomposite, agar/Cloisite Na+nanocomposite films showed a significantly increase in theWS andSR, while the WVUR did not show any significant change. Onthe contrary, the SR and WVUR decreased significantly in both agar/Cloisite 30B and 20A nanocomposite films, while the WS did not change significantly. The increase in the WS and SRR ofagar/Cloisite Na+ nanocomposite films may be attributed to thehydrophilic nature of the Cloisite Na+, while hydrophobicity oforganoclays caused decrease in the SR and WVUR of the resultingnanocomposite films. It is noteworthy that the agar/CloisiteNa+ nanocomposite film has a high water holding capacity (highSR) with increased mechanical strength and moderate flexibility,which is a desirable properties for the utilization as a hydrogel(Farris and others 2009).Table 3–Surface roughness of the agar and agar nanocompositefilms determined by AFM.1
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