Natural superabsorbent plastic materials based on a functionalized soy protein

Cuadri, A.A.; Romero, Alberto; Bengoechea, Carlos; Guerrero, Antonio

doi:10.1016/j.polymertesting.2016.12.024

Cited by 62 publications

(60 citation statements)

References 40 publications

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“…The 5% succinylated rapeseed protein isolate (5% SRPI) film has the highest TS and E values, which decreased with increasing degree of succinylation from 5% to 15%. These results are similar to those of a previous study (Cuadri et al, ) that soy protein isolate chemical modification by succinylation produces less‐fragile plastics than the soy protein isolate sample. It can be stated that high‐degree succinylation of RPI did not always exhibit high mechanical properties, only in an appropriate content.…”

Section: Resultssupporting

confidence: 92%

“…The lower WVP means the better barrier property. The succinylation reaction introduces a lot of hydrophilic carboxylate anions (Cuadri et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…However, methods that modify proteins, adding various plasticizers and emulsifiers or via blending, can affect their physicochemical properties. Succinic anhydride, the most frequently used chemical agent for protein derivatization, can influence many properties of proteins such as the amounts of net negative charge, molecular structure, steric hindrance (Purkayastha et al, ; Zhao et al, ), and so on, all of which could enhance protein solubility, surface hydrophobicity, and thermal stability (Cuadri et al, ; Wang et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Succinylation on the Physicochemical Properties and Structural Characteristics of Edible Rapeseed Protein Isolate Films

Dai

et al. 2019

J Americ Oil Chem Soc

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This study described the manufacture and characterization of different levels of succinic anhydride (0-15%, w/w) on rapeseed protein isolate (RPI) films. Mechanical, barrier, optical, surface, microstructure, and thermal properties were investigated. Results showed that 5% succinylated rapeseed protein isolate (SRPI) film revealed the overall optimal properties. The mechanical and barrier properties of 5% SRPI film were enhanced significantly compared to the RPI film. The water vapor permeability values of RPI and 5% SRPI films were 0.77 and 0.32 g mm/[hour m 2 kPa], respectively. Succinylation improved the color of RPI. The contact angle of 5% SRPI film was 108.68 and was the most hydrophobic combination. Moreover, scanning electron microscopy images revealed that 5% SRPI showed a dense, homogenous, and smooth microstructure. Thermogravimetric analysis results verified a low level of succinylation strengthened the thermal resistance of SRPI films. The content of β-sheet was almost half of all secondary structures after succinylation, which was supported by analyses of Fourier transform infrared spectroscopy. Results demonstrated that succinylation could be employed to improve the properties of rapeseed protein and SRPI films have great potential to be used as edible films.

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Section: Resultssupporting

confidence: 92%

“…The lower WVP means the better barrier property. The succinylation reaction introduces a lot of hydrophilic carboxylate anions (Cuadri et al, ).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Succinylation on the Physicochemical Properties and Structural Characteristics of Edible Rapeseed Protein Isolate Films

Dai

et al. 2019

J Americ Oil Chem Soc

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“…From all the different proteins studied in the literature related to protein‐based SAB matrices (based on pea, egg albumen, crayfish, rice, soy, and whey), soy protein has proven to be the one with the best absorbent capacity, due to its high glutamic and aspartic acid content, which gives it a good hydrophilic character . Its high lysine content also allows the introduction of some carboxylic groups, improving its hydrophilic character …”

Section: Introductionmentioning

confidence: 99%

“…21 Its high lysine content also allows the introduction of some carboxylic groups, improving its hydrophilic character. 22 Soy protein-based SAB matrices can be manufactured by injection molding, one of the most common techniques for the manufacture of synthetic plastics. This facilitates its implementation on an industrial scale.…”

Section: Introductionmentioning

confidence: 99%

Development of superabsorbent soy protein‐based bioplastic matrices with incorporated zinc for horticulture

et al. 2019

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BACKGROUND The use of superabsorbent materials in horticulture has spread recently. These materials, which can retain water and release it as crops need it, have strong advantages such as the efficient use of water in periods of drought. However, these materials are made of synthetic polymers, which present problems of degradability and, sometimes, toxicity. For this reason, the main objective of this work is the development of biodegradable superabsorbent bioplastic (SAB) matrices using a soy protein isolate (SPI) as raw material. Zinc is also incorporated into these bioplastic matrices as an essential micronutrient for plants, to increase their added value. RESULTS The incorporation of zinc chelated with 2,2′,2″,2‴‐(Ethene‐1,2‐diyldinitrilo)tetraacetic acid (Zn EDTA) (a salt with which the micronutrient is incorporated) into soy protein‐based bioplastic matrices improved their superabsorbent capacity and provided a controlled release of water and nutrients to the crops. CONCLUSIONS The results show the strong potential for the use of these bioplastic matrices in horticulture as superabsorbent materials that can release nutrients in a controlled manner. © 2019 Society of Chemical Industry

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High Capacity Functionalized Protein Superabsorbents from an Agricultural Co‐Product: A Cradle‐to‐Cradle Approach

Capezza

Cui

Numata

et al. 2020

Advanced Sustainable Systems

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Synthesis of superabsorbent particles from nontoxic wheat gluten (WG) protein, as an industrial co‐product, is presented. A natural molecular cross‐linker named genipin (a hydrogenated glycoside) is used together with a dianhydride (ethylenediaminetetraacetic EDTAD), to enable the preparation of a material with a network structure capable of swelling up to ≈4000% in water and ≈600% in saline solution. This represents an increase in swelling by over 10 times compared to the already highly absorbing gluten reference material. The carboxylation (using EDTAD) and the cross‐linking of the protein result in a hydrogel with liquid retention capacity as high as 80% of the absorbed water remaining in the WG network on extensive centrifugation, which is higher than that of commercial fossil‐based superabsorbents. The results also show that more polar forms of the reacted genipin are more effectively grafted onto the protein, contributing to the swelling and liquid retention. Microscopy of the materials reveals extensive nanoporosity (300 nm), contributing to rapid capillarity‐driven absorption. The use of proteins from agricultural industries for the fabrication of sustainable protein superabsorbents is herein described as an emerging avenue for the development of the next generation daily‐care products with a minimal environmental impact.

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Natural superabsorbent plastic materials based on a functionalized soy protein

Cited by 62 publications

References 40 publications

Effects of Succinylation on the Physicochemical Properties and Structural Characteristics of Edible Rapeseed Protein Isolate Films

Effects of Succinylation on the Physicochemical Properties and Structural Characteristics of Edible Rapeseed Protein Isolate Films

Development of superabsorbent soy protein‐based bioplastic matrices with incorporated zinc for horticulture

High Capacity Functionalized Protein Superabsorbents from an Agricultural Co‐Product: A Cradle‐to‐Cradle Approach

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