scholarly journals A high-performance bio-adhesive derived from soy protein isolate and condensed tannins

RSC Advances ◽  
2017 ◽  
Vol 7 (34) ◽  
pp. 21226-21233 ◽  
Author(s):  
Chang Liu ◽  
Yi Zhang ◽  
Xiaona Li ◽  
Jing Luo ◽  
Qiang Gao ◽  
...  
Keyword(s):  
Natural Products ◽  
Soy Protein ◽  
Condensed Tannins ◽  
High Performance ◽  
Soy Protein Isolate ◽  
Crosslinking Density ◽  
Protein Isolate ◽  
Soy Proteins ◽  
Main Achievement ◽  
Covalent Interactions

We describe the formulation of an adhesive only from natural products: soy proteins and condensed tannins. The main achievement is a high crosslinking density, which was attributed to aminomethylene bridges and covalent interactions.

“Green” bio-thermoset resins derived from soy protein isolate and condensed tannins

2017 ◽  
Vol 108 ◽  
pp. 363-370 ◽  
Author(s):  
Chang Liu ◽  
Yi Zhang ◽  
Xiaona Li ◽  
Jing Luo ◽  
Qiang Gao ◽  
...  
Keyword(s):  
Soy Protein ◽  
Condensed Tannins ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Thermoset Resins

Effect of Ultrasound Treatment on Properties of Soy Proteins Film

2011 ◽  
Vol 117-119 ◽  
pp. 513-516 ◽  
Author(s):  
Yang Sun ◽  
Chun Yu Sun ◽  
Guang Chen
Keyword(s):  
Molecular Structure ◽  
Mechanical Properties ◽  
Soy Protein ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Ultrasound Treatment ◽  
Soy Proteins ◽  
Protein Films ◽  
Protein Film ◽  
Film Forming

Soy protein isolate(SPI) based edible film as matrix materials have been prepared using the casting techniques. Ultrasound treatment (UT) could represent an interesting strategy for improving Soy protein film appearance. Different UT exposure times were applied to film-forming dispersion. The aim of this work was to investigate the effect of ultrasound treatment on Soy protein films at molecular structure and mechanical properties. The results showed that the structure of SPI film became more homogeneous and the properties has been improved largely after treated by ultrasonic, with the output power 1000 w for 16 s the tensile strength was the best; for 12 s, elongation reach the peak.

scholarly journals High-Performance Soy Protein Isolate-Based Film Synergistically Enhanced by Waterborne Epoxy and Mussel-Inspired Poly(dopamine)-Decorated Silk Fiber

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1536
Author(s):  
Pang ◽  
Zhao ◽  
Qin ◽  
Zhang ◽  
Li
Keyword(s):  
Soy Protein ◽  
High Performance ◽  
Food Packaging ◽  
Water Resistance ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Food Preservation ◽  
Silk Fiber ◽  
13C Nuclear Magnetic Resonance ◽  
Waterborne Epoxy

It remains a great challenge to fabricate bio-based soy protein isolate (SPI) composite film with both favorable water resistance and excellent mechanical performance. In this study, waterborne epoxy emulsions (WEU), which are low-cost epoxy crosslinkers, together with mussel-inspired dopamine-decorated silk fiber (PSF), were used to synergistically improve the water resistance and mechanical properties of SPI-based film. A stable crosslinking network was generated in SPI-based films via multiple physical and chemical combinations of WEU, PSF, and soy protein matrixes, and was confirmed by attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, X-ray diffraction (XRD), and solid state 13C nuclear magnetic resonance (13C NMR). As expected, remarkable improvement in both water resistance and Young’s modulus (up to 370%) was simultaneously achieved in SPI-based film. The fabricated SPI-based film also exhibited favorable thermostability. This study could provide a simple and environmentally friendly approach to fabricate high-performance SPI-based film composites in food packaging, food preservation, and additive carrier fields.

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

2017 ◽  
Author(s):  
Kuang Li ◽  
Shicun Jin ◽  
Hui Chen ◽  
Jing He ◽  
Jianzhang Li
Keyword(s):  
Tensile Strength ◽  
Microcrystalline Cellulose ◽  
Soy Protein ◽  
High Performance ◽  
Soy Protein Isolate ◽  
Composite Films ◽  
Protein Isolate ◽  
Strong Interactions ◽  
Metal Nanoclusters ◽  
Water Contact

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.

scholarly journals Rheology and Water Absorption Properties of Alginate–Soy Protein Composites

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1807
Author(s):  
Estefanía Álvarez-Castillo ◽  
José Manuel Aguilar ◽  
Carlos Bengoechea ◽  
María Luisa López-Castejón ◽  
Antonio Guerrero
Keyword(s):  
Soy Protein ◽  
Water Solubility ◽  
Divalent Cations ◽  
Low Cost ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Guluronic Acid ◽  
Wide Range ◽  
Anionic Polysaccharides ◽  
Porous Matrices

Composite materials based on proteins and carbohydrates normally offer improved water solubility, biodegradability, and biocompatibility, which make them attractive for a wide range of applications. Soy protein isolate (SPI) has shown superabsorbent properties that are useful in fields such as agriculture. Alginate salts (ALG) are linear anionic polysaccharides obtained at a low cost from brown algae, displaying a good enough biocompatibility to be considered for medical applications. As alginates are quite hydrophilic, the exchange of ions from guluronic acid present in its molecular structure with divalent cations, particularly Ca2+, may induce its gelation, which would inhibit its solubilization in water. Both biopolymers SPI and ALG were used to produce composites through injection moulding using glycerol (Gly) as a plasticizer. Different biopolymer/plasticizer ratios were employed, and the SPI/ALG ratio within the biopolymer fraction was also varied. Furthermore, composites were immersed in different CaCl2 solutions to inhibit the amount of soluble matter loss and to enhance the mechanical properties of the resulting porous matrices. The main goal of the present work was the development and characterization of green porous matrices with inhibited solubility thanks to the gelation of alginate.

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