Kekuatan Bending Pada Komposit Pati Singkong Dan Chitosan Dengan Mikro Jelatang

Abstract

This study aims to examine the effect of the addition of nettle microfibers on the bending strength of cassava
starch and chitosan-based composites. The composition variations used include T1 (85% cassava starch: 13%
chitosan: 1% micro nettle: 1% mekpo), T2 (85% cassava starch: 12% chitosan: 2% micro nettle: 1% mekpo),
and T3 (85% cassava starch: 11% chitosan: 3% micro nettle: 1% mekpo). Bending tests were carried out to
obtain stress, modulus of elasticity, and strain values. The results showed that increa sing the fraction of micro
nettle had a significant effect on the mechanical. In the bending test, specimen T3 produced the highest stress
and elastic modulus of 21.477 MPa and 2.217 GPa, respectively, while T1 showed the lowest values of 12.713
MPa and 1.259 GPa. However, the highest strain value was obtained in T1 at 1.429%, while the lowest strain
was found in T3 at 1.199%. Thus, the more nettle microfibers added, the more the flexural strength and elastic
modulus increased, but the strain tended to decrease.