Characterization of soy protein–celery composite paper sheet: Rheological behavior, mechanical, and heat‐sealing properties

Abstract

The rheological properties of soy protein spray‐coating dispersions were investigated as a function of concentration (10–13.75%) and temperature (30–60°C). The dispersions showed a shear‐thinning behavior. With the increase in concentration, the consistency coefficient (κH) values increased. An increasing in temperature led to an increasing flow behavior index (nH) and a decreasing κH. However, Cox–Merz rule was not applicable to the coating dispersions. Soy protein–celery composite paper sheet was prepared by spraying soy protein on the surface of the celery paper sheet. The cohesion of soy protein and celery fiber resulted in sealing of celery paper. The seal strength increased with the increase in soy protein concentration. The seal strength increased from 114.850 to 160.560 N/m, when the soy protein concentration increased from 10 to 13.75%. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Molecular Property-Tailored Soy Protein Extraction Process Using a Deep Eutectic Solvent

“…Because of its high content and good quality, soy protein is a good source of edible protein and also has the extremely high value in the non-food aspect, such as protein glues, whose adhesion strength depends on their dispersibility in water and the interactions between polar and non-polar groups of the protein and adhering substrates . In addition, soy protein also plays an incomparable role in the coating materials. − Processing soy protein in certain ways destroys the internal interactions in the protein, resulting in protein subunit dissociation, molecular denaturation, and molecular stretching. After the exposure of hydrophobic and sulfhydryl groups, the interactions between molecules are enhanced, and some disulfide bonds in the molecules are broken to form new disulfide bonds.…”

Bio‐based polymeric resin from agricultural waste, neem (Azadirachta indica) seed cake, for green composites

“…Numerous studies have shown that agricultural raw materials could be used as a source of various bio-based polymers for the production of biodegradable materials. [1][2][3][4][5][6][7][8][9][10] Among bio-based polymers, plant proteins have been considered as attractive and sustainable sources for biodegradable materials due to their being inexpensive, yearly renewable, and plentiful availability. [11][12][13][14][15][16] Plant proteins offer a wide range of potential functional properties as bio-based resins due to the presence of different reactive groups of the amino acids that can be easily accessed to form inter-and intra-molecular bonds.…”

“…Growing ecological concerns, economic awareness, and worldwide availability of plant sources have fueled an interest in research for the development of environment‐friendly sustainable green materials as alternatives to nondegradable petroleum based materials. Numerous studies have shown that agricultural raw materials could be used as a source of various bio‐based polymers for the production of biodegradable materials . Among bio‐based polymers, plant proteins have been considered as attractive and sustainable sources for biodegradable materials due to their being inexpensive, yearly renewable, and plentiful availability .…”

“…Photographic images of control NP (1), 15% sorbitol-plasticized NP (2), 15% glycerol-plasticized NP(3), and 15% sorbitol-plasticized with 10% glyoxal cross-linked NP sheets(4). [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.…”

Heat‐sealing properties of soy protein isolate/polyvinyl alcohol film made compatible by glycerol

“…Kim and Ustunol, Cagri et al, and Hernandez‐Izquierdo and Krochta analyzed the heat‐sealing properties, methods, and processes of whey protein films, and found that these films prepared by both solution casting and extrusion can be heat‐sealed by conventional heat sealing or impulse sealing. Shao et al pointed out that soy protein coating yielded heat‐sealable and edible celery paper, but the seal strength was not high. Su et al examined the heat‐sealing properties of SPI/PVA blend films using X‐ray diffraction, Fourier transform infrared spectrometry, scanning electron microscopy, and differential scanning calorimetry (DSC), mainly focused on the sealing temperature.…”