3.3. Mechanical properties
Tensile test was performed using Instron universal testing machine
to measure the mechanical properties of the film samples, and the results
of the tensile strength (TS), elongation at break (EB), and elastic
modulus (EM) of carrageenan and carrageenan-based nanocomposite
films are shown in Table 2.
The TS, EB, and EM of the neat carrageenan
film were 56.5 MPa, 4.0%, and 3.6 GPa, respectively, which indicates
that the carrageenan film is mechanically stronger than most of commodity
plastic films or PLA film (Rhim et al., 2013), but the flexibility
of the carrageenan filmis very low.
The TS of carrageenan nanocomposite
films increased significantly (p b 0.05) with an increase in the range
of 14.3 to 26.2% compared to that of the neat carrageenan film.
The clay
mineralwasmore effective in increasing the TS of carrageenan film than AgNP
3.3. Mechanical propertiesTensile test was performed using Instron universal testing machineto measure the mechanical properties of the film samples, and the resultsof the tensile strength (TS), elongation at break (EB), and elasticmodulus (EM) of carrageenan and carrageenan-based nanocompositefilms are shown in Table 2. The TS, EB, and EM of the neat carrageenanfilm were 56.5 MPa, 4.0%, and 3.6 GPa, respectively, which indicatesthat the carrageenan film is mechanically stronger than most of commodityplastic films or PLA film (Rhim et al., 2013), but the flexibilityof the carrageenan filmis very low. The TS of carrageenan nanocompositefilms increased significantly (p b 0.05) with an increase in the rangeof 14.3 to 26.2% compared to that of the neat carrageenan film. The claymineralwasmore effective in increasing the TS of carrageenan film than AgNP
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