Development of biodegradable bioplastic films from Taro starch reinforced with bentonite

Shanmathy, Mrithula; Mohanta, Monalisha; Thirugnanam, A.

doi:10.1016/j.carpta.2021.100173

Cited by 42 publications

(32 citation statements)

References 20 publications

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“…According to Han [ 33 ], the tensile strength of films below 1 MPa or between 1–10 MPa is regarded as inferior or marginal for physical strength of plastics. Therefore, the proximate resin of starch and other polymers could be used to enhance the physical strength of biodegradable films [ 8 , 13 ].…”

Section: Resultsmentioning

confidence: 99%

“…The amylose and amylopectin polysaccharides present in starch mainly contribute to mechanical and optical properties of starch-based films [ 7 ]. The linear construction of amylose poly (α-1,4-glucopyranosyl) in starch generally produces biodegradable plastics with stronger and extremely flexible mechanical properties, while the structure of branched amylopectin poly (α-1,4-glucopyranosyl) produces biodegradable plastics that shows decreased resistance to elongation and tensile strength properties [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the amylopectin component of taro starch is short and retains long chain lengths that help in forming firm gels with high elasticity [ 11 ]. Taro starch depicts an A-type crystallinity where the crystalline matrix is tightly packed by double helices, which enables the starch to resist higher heat and shear conditions [ 8 ]. Reports of taro starch used to develop bioplastics indicate that taro starch films mixed with increasing increments of bentonite or chitosan demonstrated increased mechanical strength [ 8 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Taro starch depicts an A-type crystallinity where the crystalline matrix is tightly packed by double helices, which enables the starch to resist higher heat and shear conditions [ 8 ]. Reports of taro starch used to develop bioplastics indicate that taro starch films mixed with increasing increments of bentonite or chitosan demonstrated increased mechanical strength [ 8 , 12 ]. However, since no reports were found in the literature, this study is the first to report the use and investigation of taro peel starch in the formation of biodegradable films, which highlights the novelty of this study.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Biodegradable Films Made from Taro Peel (Colocasia esculenta) Starch

et al. 2023

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Studies of renewable polymers have highlighted starch’s role to replace petroleum-based components to produce biodegradable films with plastic-like qualities. In this study, the novelty of taro peel starch (TPS) to produce such films using the casting technique is reported for the first time. A response surface method (RSM) approach was employed to optimize different concentrations of TPS (2.5–3.5%, w/w) and glycerol (25–35%, w/w) and investigate their effects on the physico-mechanical and water barrier properties of TPS films. TPS films showed a positive linear effect (p < 0.05) for thickness (0.058–0.088 mm), opacity (1.95–2.67), water vapor permeability (0.06–0.09 g∙m/m2∙kPa∙h), and cubic effect (p < 0.05) for moisture content (0.58–1.57%), which were linked to high starch concentrations when plasticized with glycerol. X-ray diffraction analysis of TPS films depicted “amorphous”-type crystalline structure peaks at 19.88°, while the thermogravimetric analysis of the film samples exhibited 75–80% of the weight loss of TPS film in the second phase between temperatures of 300 °C to 400 °C. All films exhibited homogenous, transparent surfaces with flexibility, and completely degraded in 5 days in simulated river water and composting soil environments, which confirmed TPS as a promising film polymer in food packaging.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of Biodegradable Films Made from Taro Peel (Colocasia esculenta) Starch

et al. 2023

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“…W 2 = the weight of the bio-composite sample after the biodegradable test [ 29 , 30 , 31 , 32 , 33 , 34 ].…”

Section: Materials and Methodologymentioning

confidence: 99%

Synthesis and Characterization of Eco-Friendly Bio-Composite from Fenugreek as a Natural Resource

et al. 2022

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The present study show the usability of starch (tamarind) based-bio-composite film reinforced by fenugreek by various percentages to replace the traditional petrochemical plastics. The prepared bio-composite films were systematically characterized using the universal testing machine (UTM), soil degradation, scanning electron microscope (SEM), X-ray diffraction (XRD), thermogravimetric analyzer (TGA), and antibacterial tests. The experiments showed that a lower percentage of fenugreek improves biodegradation and mechanical strength. More than 60% of biodegradation occurred in only 30 days. Almost 3 N/mm2 tensile strength and 6.5% tensile strain were obtained. The presence of micropores confirmed by SEM images may accelerate the biodegradation process. Antibacterial activity was observed with two samples of synthesized bio-composite, due to photoactive compounds confirmed by FTIR spectra. The glass transition temperature was shown to be higher than the room temperature, with the help of thermal analysis. The prepared bio-composite containing 5% and 10% fenugreek showed antibacterial activities.

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Facile synthesis of carboxymethyl cellulose from Indonesia's coconut fiber cellulose for bioplastics applications

Ndruru,

Amri,

Kusuma

et al. 2024

Polymer Engineering & Sci

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Coconut fibers contain many lignocellulosic components; therefore, they have the potential to be used as cellulose‐based materials. This study aims to synthesize carboxymethyl cellulose (CMC) for bioplastic applications from coconut fiber cellulose obtained from South Tangerang, Indonesia. The isolation of cellulose was conducted in two key stages: alkaline treatment using a delignification reactor and bleaching with hydrogen peroxide (H2O2). The facile synthesis of CMC involved two important steps: alkaline treatment and carboxymethylation of isolated cellulose. The yield of cellulose isolated from coconut fiber was 16.39% for biomass and 64.84% for delignification products. The cellulose produced exhibited a crystallinity index (C.I.) of 89%. The yield of CMC was 14.67%, with a C.I. was 56.66%. The CMC obtained was categorized as having a medium molecular weight of 249,048 Da with a polymerization degree of 1046. Cellulose starts to decompose at a temperature interval of 292.05–381.45°C, whereas CMC decomposes at a lower temperature interval of 245.42–299.73°C. Thermochemical calculations were conducted by using the density functional theory (DFT), confirming a spontaneous reaction with a Gibbs free energy of −5.25 kJ mol−1. Bioplastics were fabricated in two stages: blending with carboxymethyl chitosan (CMChi) and plasticizing with glycerol. The addition of CMCh increased the C.I. and tensile strength, while the addition of glycerol to CMC/CMChi (80/20) blend‐based bioplastic reduced the C.I. and tensile strength, but enhanced the relative contact angle.Highlights Cellulose was isolated from coconut fibers through a two‐stage process involving delignification and bleaching; Carboxymethyl cellulose was synthesized by monochloroacetic acid in isopropanol with NaOH as the catalyst; The optimum condition for achieving the highest elongation at break among the blending compositions was found in the CMC/CMChi (80/20) blend bioplastic; Adding up to 30 wt% glycerol decreased the tensile strength and increased the elongation at break; The addition of glycerol enhanced the hydrophobic properties of CMC/CMCh blend‐based bioplastics.

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Development of biodegradable bioplastic films from Taro starch reinforced with bentonite

Cited by 42 publications

References 20 publications

Characterization of Biodegradable Films Made from Taro Peel (Colocasia esculenta) Starch

Characterization of Biodegradable Films Made from Taro Peel (Colocasia esculenta) Starch

Synthesis and Characterization of Eco-Friendly Bio-Composite from Fenugreek as a Natural Resource

Facile synthesis of carboxymethyl cellulose from Indonesia's coconut fiber cellulose for bioplastics applications

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