Environment friendly green composites based on soy protein isolate – A review

Koshy, Rekha Rose; Mary, Siji K.; Thomas, Sabu; Pothan, Laly A.

doi:10.1016/j.foodhyd.2015.04.023

Cited by 193 publications

(101 citation statements)

References 134 publications

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“…The two major globulins present in the SPI, 7S and 11S, amounting about 37% and 31% of the total extractable protein, have a good filmforming ability. 13,14 Gelatin (G) is another eco-friendly material obtained by partial degradation of collagen. 11,12 However, the film obtained from unmodified SPI is very brittle and colored, and have relatively poor mechanical properties and moisture barrier properties, which is a critical issue for commercial applications.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal properties of microcrystalline cellulose-reinforced soy protein isolate–gelatin eco-friendly films

Luo

Qin

et al. 2015

RSC Adv.

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Eco-friendly films containing soy protein isolate (SPI), gelatin, and microcrystalline cellulose (MCC) were made by casting. Effects of MCC content on mechanical and thermal properties of MCC-reinforced SPI-gelatin (MSG) films were studied. With the increasing of MCC content, thickness and tensile strength (TS) of MSG films increased, and the elongation at break (EB) decreased. MSG films containing 3.5% MCC (MSG3.5) had the limit values of the thickness, TS, and EB, which were 108%, 351%, and 27% of those of films without MCC, respectively. While all MSG films exhibited lower moisture content and total soluble matter compared to SPI-gelatin film. Film with 1.5% MCC (MSG1.5) had the minimum value of moisture content as 16.41%, and film with 2.5% MCC (MSG2.5) had the minimum value of total soluble matter as 24.87%. Scanning electron microscope photomicrographs showed that MCC dispersed well in the SPI-gelatin matrix, and the films had a relatively smooth surface. Blending of 2.5% MCC caused a rough and uneven surface, resulting in a more ductile failure of MSG2.5 films. Attenuated total reflectance-Fourier transform infrared spectroscopy revealed that there was no intermolecular association via chemical bonds between MCC and SPI-gelatin. Thermo-gravimetric analysis showed that the thermal degradation of MSG films initiated at higher and ended at lower temperature than the SPI-gelatin film. Date of differential scanning calorimetry scans indicated that MSG films had a smaller degree of crystallinity, which was also confirmed by test results of dynamic mechanical analyzer. Blending MCC with SPI-gelatin film has been successful in obtaining better mechanical and thermal properties as well as reduced moisture sensitivity. In addition, the films became more transparent, and transmittance was improved.

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Section: Introductionmentioning

confidence: 99%

Mechanical and thermal properties of microcrystalline cellulose-reinforced soy protein isolate–gelatin eco-friendly films

Luo

Qin

et al. 2015

RSC Adv.

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“…The characteristic amide bands of soy proteins at 1628, 1536, and 1234 cm -1 were assigned to amide I (C-O stretching), amide II (N-H bending) and amide III (C-H and N-H stretching), respectively [25]. These featured bands were reported that might be affected by hydration and protein-solvent interactions [26]. With the addition of MCC, amide I and II of SPI-MCC film shifted to 1626 and 1537 cm -1 , respectively, indicating the films might expose more polar groups and increase the bindings between the peptide chains [27].…”

Section: Structural Analysismentioning

confidence: 95%

High-Performance Microcrystalline Cellulose/Soy Protein Isolate-Based Nanocomposite Film via Cu and Zn Nanoclusters Modification

Kuang¹,

Jin²,

Chen³

et al. 2017

Preprint

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Soy protein isolate (SPI) based materials are abundant, biocompatible, renewable, and biodegradable. In order to improve the tensile strength (TS) of SPI films, we prepared a novel composite film modified with microcrystalline cellulose (MCC) and metal nanoclusters (NCs) in this research. The effects of the modification of MCC on the properties of SPI-Cu NCs and Zn NCs films were investigated. Attenuated total reflectance-Fourier transformed infrared spectroscopy analyses and X-ray diffraction patterns characterized the strong interactions and reduction of the crystalline structure of the composite films. Scanning electron microscope showed the enhanced cross-linked and entangled structure of modified films. Compared with untreated SPI film, the tensile strength of the SPI-MCC-Cu and SPI-MCC-Zn films increased from 2.91 MPa to 13.95 and 6.52 MPa, respectively. Moreover, the results also indicated their favorable water resistance with higher water contact angle. Meanwhile, the composite films exhibited increased initial degradation temperatures, demonstrating their higher thermostability. The results suggested that MCC could effectively improve the performance of SPI-NCs films, which would provide a novel preparation method for environmentally friendly SPI-based films in the applications of packaging materials.

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“…One of these techniques is the production of biodegradable polymeric films. Thus much research throughout the world is currently focused on substituting traditional fossil‐derived polymers with renewable and biodegradable materials …”

Section: Introductionmentioning

confidence: 99%

Alginate biofilms plasticized with hydrophilic and hydrophobic plasticizers for application in food packaging

Paixão

Lopes

Barros

et al. 2019

J of Applied Polymer Sci

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Biofilms are defined as flexible films prepared from biological materials such as proteins or polysaccharides, which act as barriers to external elements and can consequently protect the products and increase their shelf life. The objective of this study was to evaluate the effects of hydrophilic and hydrophobic plasticizers and mixtures thereof in the characterization of alginate biofilms. Films plasticized with glycerol were less hygroscopic than films plasticized with TC (tributyl citrate) or with TC/glycerol mixtures. The presence of TC in the plasticization of the films turn them more hygroscopic, thus confirming their excellent performance in protecting against dissolution and in water vapor permeability. Films plasticized with pure TC were the least water‐soluble and showed the higher tensile stress, having a globular microstructure, which was attenuated as the TC was partially substituted by glycerol, making the structure more compact but not as homogenous as films containing only glycerol as the plasticizer. Films plasticized with pure TC and with TC/glycerol mixtures were opaque and showed only one glass transition temperature (Tg). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48263.

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Environment friendly green composites based on soy protein isolate – A review

Cited by 193 publications

References 134 publications

Mechanical and thermal properties of microcrystalline cellulose-reinforced soy protein isolate–gelatin eco-friendly films

Mechanical and thermal properties of microcrystalline cellulose-reinforced soy protein isolate–gelatin eco-friendly films

High-Performance Microcrystalline Cellulose/Soy Protein Isolate-Based Nanocomposite Film via Cu and Zn Nanoclusters Modification

Alginate biofilms plasticized with hydrophilic and hydrophobic plasticizers for application in food packaging

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