PEMBUATAN FILM KOMPOSIT KITOSAN –TAPIOKA : PENGARUH KOMPOSISI TERHADAP KARAKTERISTIK FILM
Abstract: Cassava starch can
readily be cast into films. However, the cassava starch film is brittle and
weak leading to inadequate mechanical properties. Therefore it is necessary
blending with other biopolymers that can overcome these drawbacks. In this
study, composite film prepared by blending of cassava starch and chitosan
solutions with ratio 2:8, 3:7, 4:8, and 5:5. The results show that the
mechanical strength of the film increase with increasing the chitosan content.
The significant decline in both permeability and degree of swelling with
increasing the content of chitosan in the composite film. The hydrophobic
acetyl groups of chitosan caused a notable reduction of wettability as well as
water permeability. The degree of swelling experiments showed that the films
have the highest degree of swelling in water followed by technical ethanol
(±95%) and pure analysis ethanol (>99.9%). SEM photographs of the surface of
film with the ratio 5:5 have more homogeneous than the ratio 2:8. The amino
group peak in IR spectrum of chitosan molecule shifted from 1581 to 1587 cm−1
with the incorporation of starch. These results suggested that these two
film-forming components were compatible and an interaction existed between
them.
Penulis: Nur Rokhati Rokhati,
Bambang Pramudono, I. Nyoman Widiasa
Kode Jurnal: jpkimiadd130357
