Starch-based edible films of improved cassava varieties Yavo and TMS reinforced with microcrystalline cellulose (original) (raw)
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A Comparative Study of Some Properties of Cassava and Tree Cassava Starch Films
Physics Procedia, 2014
Cassava and tree cassava starch films plasticized with glycerol were produced by casting method. Different glycerol contents (30, 35, 40 and 45 wt. % on starch dry basis) were used and the resulting films were fully characterized. Their water barrier and mechanical properties were compared. While increasing glycerol concentration, moisture content, water solubility, water vapour permeability, tensile strength, percent elongation at break and Young's modulus decreased for both cassava and tree cassava films. Tree cassava films presented better values of water vapour permeability, water solubility and percent elongation at break compared to those of cassava films, regardless of the glycerol content.
Physical and Mechanical Characteristics of Edible Film Based on Cassava Peel Starch
AGRISAINTIFIKA: Jurnal Ilmu-Ilmu Pertanian, 2021
Cassava peel is an agro-industrial waste that is not used or not recycled. Based on the carbohydrate content of cassava peel, which is 50% of the weight of the peel, so that the cassava peel can be used as an ingredient for making edible films. Edible film is a thin layer made of natural ingredients that are safe for consumption. The biodegradable nature and can be used in this edible makes edibles used because they can be an alternative to synthetic plastics and are environmentally friendly. The purpose of this study was to determine the physical properties and mechanisms of the edible film of cassava peel starch. This study used a simple randomized block design (RBD) with 3 levels, namely A1(2%), A2(4%), A3(6%) with 3 replications. Research data on cassava peel characteristics showed water content (14.62%), starch content (73.29%), amylose content (21.02%), amylopectin content (52.27%), and HCN content (7.01%). %). The results of the edible physical and mechanical properties showe...
African Journal of Food, Agriculture, Nutrition and Development, 2015
Biopolymer films and coatings from polysaccharides, proteins and lipids, formulated either with one or more components have the potential to control mass transfer and thus extend food shelf life. Due to the increase in the price of starches from traditional sources (such as corn), native or modified cassava starch has been recently considered as an economic alternative for the food industry. In this study, the effects of sucrose and vegetable oil as natural, cheaper and available plasticizer and moisture barrier material, on optical, mechanical and water barrier properties of cassava starch-based films were analyzed. Visual appearance and the polarized light microscopy data revealed that oil made the film opaque, and larger oil droplets were formed as sucrose content increased. The modification of the starch network, when sucrose was used at higher concentrations (15-20%), in combination with oil, weakened mechanical and water barrier properties. The behaviour of sucrose added to aq...
2012
Background: Cassava starch, the economically important agricultural commodity in Thailand, can readily be cast into films. However, the cassava starch film is brittle and weak, leading to inadequate mechanical properties. The properties of starch film can be improved by adding plasticizers and blending with the other biopolymers. Results: Cassava starch (5%w/v) based films plasticized with glycerol (30 g/100 g starch) were characterized with respect to the effect of carboxymethyl cellulose (CMC) concentrations (0, 10, 20, 30 and 40%w/w total solid) and relative humidity (34 and 54%RH) on the mechanical properties of the films. Additionally, intermolecular interactions were determined by Fourier transform infrared spectroscopy (FT-IR), melting temperature by differential scanning calorimetry (DSC), and morphology by scanning electron microscopy (SEM). Water solubility of the films was also determined. Increasing concentration of CMC increased tensile strength, reduced elongation at break, and decreased water solubility of the blended films. FT-IR spectra indicated intermolecular interactions between cassava starch and CMC in blended films by shifting of carboxyl (C = O) and OH groups. DSC thermograms and SEM micrographs confirmed homogeneity of cassava starch-CMC films. Conclusion: The addition of CMC to the cassava starch films increased tensile strength and reduced elongation at break of the blended films. This was ascribed to the good interaction between cassava starch and CMC. Cassava starch-CMC composite films have the potential to replace conventional packaging, and the films developed in this work are suggested to be suitable for low moisture food and pharmaceutical products.
Starch content affects physicochemical properties of corn and cassava starch-based films
Industrial Crops and Products, 2017
Biodegradable starch-based film has been widely used as alternative to packaging derived from fossil sources. The composition, structural and morphological properties of starch granules vary with plant source, contributing to significant differences in properties and desired functionality. The objective of this work was to evaluate the starch content influence on physicochemical properties of corn (Zea mays L.) and cassava (Manihot esculenta L.) starch-based films manufactured by casting. Different starch contents (20-60 g kg −1), glycerol (9 g kg −1) and xanthan gum (0.05 g kg −1) were used. From Scanning Electron Microscopy (SEM) analysis, it can be seen that corn and cassava native starches exhibited polyhedral and oval shape, respectively. The Principal Component Analysis (PCA) results showed that higher biopolymer content promoted an increase in thickness (ranging between 0.07 and 0.17 mm) and a reduction in water vapor permeability (ranging between 0.42 and 0.15 g mm h −1 m −2 kPa −1) of the starch-based films. Moreover, increased starch content in the films promoted improved mechanical properties. For the same starch content, cassava starch based films presented higher water solubility than corn films, approximately 22% and 16%, respectively. Mechanical properties of the starch (40 g kg −1) based films as tensile strength, (3.9 MPa), maximum elongation (120%) and elastic modulus (65 MPa) were comparable to LDPE (low density polyethylene) based films used as food packaging currently marketed. From the results obtained, corn and cassava starch may be considered promising alternatives for the food packaging development.
— Edible films have been successfully used in the food packaging industry for several decades. Today natural polysaccharides, including cassava starch,are increasingly being used in the production of such biodegradable edible films and food packaging. In Côt e d'Ivoire, there are improved cassava varieties whose starches have not yet been tested in the production of biodegradable films. In thisstudy, the optical and mechanical properties and the water solubility of starch-based composite films of four improved cassava varieties withadded glycerol, peanut oil and soy lecithin were determined. Starchwas obtained by cold water extraction from native cassava from the varieties Bocou 1, Bocou 2, Yavo and TMS. Films preparation was made bycasting methodwithcassava, glycerol (25-30 %), peanutoil (5-10 %) and soybean lecithin (0-5 %). Increasing the glycerol content, increased L*color valueand elongationat break and decreased a*, b*, colourdifference (ΔE* ab) and tensilestrength of the composite films. Also, increasing the oil content from 5 to 10%, increased the opacity, b*, ΔE*ab, water solubility, elongationat break but decreased L*, a* and tensilestrength. Similarly, increasing the soy lecithin content from 0 to 5%, increased the opacity, L*, b* and ΔE*ab, but decreased a*, of the starch-based composite films. The results suggest an ideal formulation of 4% starch/25% glycerol/5% oil/5% soy lecithinfor a film with optimum mechanical properties with low solubility.
Packaging Technology and Science, 2008
The aim of this work was to investigate the effect of glycerol contents on physical properties of cassava starch films. The films were prepared from film-forming solutions (FFS) with 2g cassava starch/100g water and 0, 15, 30 and 45g glycerol/100g starch, and were analysed to determine its mechanical properties by tensile tests, the glass-transition temperature (Tg) by differential scanning calorimetry (DSC) and the crystallinity by X-ray diffraction (XRD). The infrared spectra of the films were also recorded. The resistance values of the films decreased, while those of the elasticity increased with an increase in glycerol concentration due to the plasticizer effect of glycerol, which was also observed in DSC curves. The Tg of the films prepared decreased with the glycerol content. However, for samples with 30 and 45g glycerol/100g starch, two Tg curves were observed, probably due to a phase separation phenomenon. According to the XRD diffractograms, the films with 0 and 15gglycerol/100g starch presented an amorphous character, but some tendency to show crystalline peaks were observed for films with 30 and 45g glycerol/100g starch. The results obtained with Fourier transform infrared (FTIR) corroborated these observations. Copyright © 2007 John Wiley & Sons, Ltd.