Preparation and Characterization of All-Biomass Soy Protein Isolate-Based Films Enhanced by Epoxy Castor Oil Acid Sodium and Hydroxypropyl Cellulose

Abstract

All-biomass soy protein-based films were prepared using soy protein isolate (SPI), glycerol, hydroxypropyl cellulose (HPC) and epoxy castor oil acid sodium (ECOS). The effect of the incorporated HPC and ECOS on the properties of the SPI film was investigated. The experimental results showed that the tensile strength of the resultant films increased from 2.84 MPa (control) to 4.04 MPa and the elongation at break increased by 22.7% when the SPI was modified with 2% HPC and 10% ECOS. The increased tensile strength resulted from the reaction between the ECOS and SPI, which was confirmed by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). It was found that ECOS and HPC effectively improved the performance of SPI-based films, which can provide a new method for preparing environmentally-friendly polymer films for a number of commercial applications.

Preparation and Characterization of Lactobacilli‐Loaded Composite Films with Sustaining Antipathogenic Activity and Preservation Effect

“…Similar conclusions were reported by Wang et al. () and El‐Wakil et al. (), whereas the addition or increase in concentration of HPC induced an increase in flexibility of the packaging films.…”

“…Li et al, 2011). Similar conclusions were reported by Wang et al (2016) and El-Wakil et al (2016), whereas the addition or increase in concentration of HPC induced an increase in flexibility of the packaging films. The mechanical strength of the films was observably reinforced by KF, which was similar to the result obtained by Leuangsukrerk et al (Leuangsukrerk et al, 2014).…”

“…Some biopolymers, for instance, celluloses, proteins, starches, gums, or the combined forms, are being investigated to develop environmentally friendly food packaging (Skurtys, Acevedo, Pedreschi, Osorio, & Aguilera, ; Yoo & Krochta, ). Cellulose derivatives such as hydroxypropyl cellulose (HPC), which have the advantages of extensibility, biodegradability, tastelessness, and odorlessness, and serving as flavor barriers, are promising film‐forming components (Wang, Li, Zhang, & Shi, ). For biocompatibility, nontoxicity, mechanical resistance, and film‐forming properties, konjac glucomannan (KGM) has been made full application in food industry.…”

Improvement of water barrier properties of soybean protein isolate films by poly(3‐hydroxybutyrate) thin coating

“…8 Soy protein isolate (SPI) is a commercial form that contains more than 90% proteins that has excellent film forming properties, yielding flexible, smooth and clear materials. [9][10][11] However, SPI-based films have high water vapor permeability (WVP) and their mechanical properties become poorer in practical applications with highly humid conditions. 3 These features reduce their potential as food packaging since they would end up affecting the quality and safety of food.…”

Simultaneously Toughening and Strengthening Soy Protein Isolate-Based Composites via Carboxymethylated Chitosan and Halloysite Nanotube Hybridization

“…ATR-FTIR spectra were measured to investigate the changes in functional groups in the SPI-based films. Figure 2 A shows Films (a–d) shared similar spectra: The peaks at 1630, 1537, and 1236 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 [ 9 , 10 , 32 ]. The broad absorption band at 3274 cm −1 was attributed to the O-H and N-H bending vibrations, and the peak at 2930 cm −1 was assigned to the stretching vibrations of the methylene groups.…”