Properties of cassava starch-based bioplastics and CMC with sorbitol as A plasticizer

Abstract

This research aims to synthesize and characterize the properties of starch and starch/CMC-based bioplastics and to know the effect of sorbitol concentration on bioplastics produced. Characterization the bioplastics used SEM, FTIR and XRD as well as thickness, tensile strength, elongation at break, and resistant to water and acid. The result showed that synthesis of starch and starch-bioplastic success and the surface of bioplastics is uniform, except bioplastic from pure starch. Starch/CMC-based bioplastics is thinner (106.67 ± 5.13 μm), lower tensile strength (8.95 N), more easily degraded by water (33 hours) and acid (15 hours) but highest elongation at breaks (48.15%) than starch based-bioplastics. Sorbitol concentration is proportional to the level of elongation at break and the optimum concentration which added to starch-based bioplastic is 15 mL/20g starch.

Advantages and Disadvantages of Bioplastics Production from Starch and Lignocellulosic Components

“…This higher WVP of the starch/CMC bioplastic may be due to the hydrophilicity of the carboxymethyl group in the CMC. A greater interaction with water and smoother surface morphology of bioplastics with CMC was reported [ 156 ]. The improvement of mechanical properties and increase WVP in bioplastics developed with CMC have been confirmed [ 153 , 157 , 158 ].…”

“…The improvement of mechanical properties and increase WVP in bioplastics developed with CMC have been confirmed [ 153 , 157 , 158 ]. However, conflicting results [ 156 , 157 ] of the effect of CMC on solubility in starch-based bioplastics may be the result of different factors such as botanical source, crystallinity, purity, processing, and DS.…”

Valorization of Banana Stumps with Polyol and Chitosan as Bioplastic Raw Materials

“…Sorbitol bersifat tidak beracun, tidak mudah menguap, mudah terdegradasi, mudah ditemukan dan food grade. Penambahan sorbitol dapat meningkatkan tensile strength dan modulus young dari bioplastik yang dihasilkan [10]. Untuk meningkatkan ketahanan bioplastik terhadap serangan mikroba, kitosan menjadi salah satu bahan aditif yang akan digunakan pada penelitian ini.…”

Bio-Based Plastics Production, Impact and End of Life: A Literature Review and Content Analysis

“…On the other hand, researchers have been looking into developing biodegradable, nonvolatile, and nontoxic additives to improve bioplastics' mechanical, thermal, and physical properties and biodegradability to a great extent, with minimal concurrent leaching [78][79][80][81]. As was noticeable in the retrieved papers, incorporating polysaccharide or lipid-based plasticizers into conventional plastics such as poly (vinyl chloride) (PVC) has become more attractive than the traditional phthalates plasticizers and has shown competitive performance with potential in industrial application [82,83].…”