Influence of Natural Biomaterials on the Elastic Properties of Starch-Derived Films:  An Optimization Study

Abstract

A D-optimization design was applied to investigate the strength properties of biomaterial-doped starch films. The individual effect of each additive and associated interactive effects were investigated. Cellulosic fibers and chitosan were able to substantially enhance film strength. Lignin and gelatin also demonstrated significant interactive effects on strength, while different interactive effects were evident between the major biopolymers (fiber and chitosan) and minor biopolymers (lignin and gelatin). The film stretch depended on the material composition where diminishing returns were observed for stretch, while strength increased for increasing levels of each of the biopolymers. An increase in fiber and chitosan contents led to increases in film density that correlated well with strength. The latter data indicate that fiber and chitosan biopolymers act synergistically by providing increased film bonding that eventually generates a stronger film.

Alkyl chitosan film‐high strength, functional biomaterials

“…When alkyl group bonded with NH 2 group, the alkyl group could break the inter‐ and intra‐molecular hydrogen bond, and with the fracture of hydrogen bond, the curling of chitosan molecular become linearly. At the same time, line becomes even regular with the longer alkyl group, so that the tensile strength of alkyl chitosan film strengthen . However, when octyl group was introduced to chitosan, the obtained film was not of strong tensile strength that is poorer than chitosan film.…”

Review: Pengaruh Konsentrasi Larutan Kitosan Sebagai Coating Agent Terhadap Daya Serap Air Pada Bioplastik Dari Pati Singkong Dan Gluten

“…Pada penelitian sebelumnya menggunakan pati singkong, dilaporkan bahwa film masih memiliki kekurangan yaitu daya tahan penyerapan air yang kurang baik dan sifat mekanik yang kurang baik. Dalam menangani hal tersebut bioplastik dapat dicampur bahan biopolimer seperti seluosa, kitosan, dan protein [3][4]. Penambahan bioplastik berbasis pati dan protein telah dilakukan dengan pati kentang dan albumin dari putih telur yang menghasilkan film transparan, daya serap air berlebih dan kuat tarik yang masih kurang [5], adanya penambahan bahan seperti kitosan dapat menambah kekuatan mekanik pada bioplastik berbahan dasar pati hal ini dikarenakan adanya ikatan hidrogen antara gugus karboksilat pada karbohidrat dan gugus asam amino pada kitosan [6].…”

Cellulose Microfibrils Filler Contributes to Thermal Stability and Morphology of Bioplastics from Sorghum-Based

“…The bioplastic synthesis was done according to Ban et al, procedure with some modifications [6]. Starch and chitosan were made in 10 g total by weight (on a dry basis) with some variation on starch to chitosan ratios (w/w), typically 10:0, 9.5:0.5, 8.5:1.5, 7.5:2.5, 6.5:3.5, and 5.5:4,5.…”