Effects of wheat gluten protein on the properties of starch based sustainable wood polymer nanocomposites

Baishya, Prasanta; Nath, Deepankar; Begum, Pakiza; Deka, Ramesh C.; Maji, Tarun K.

doi:10.1016/j.eurpolymj.2017.09.041

Cited by 20 publications

(5 citation statements)

References 60 publications

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“…The films formed had good barrier properties but were softer and weaker than the films formed using ammonium hydroxide as the solvent. 41,42…”

Section: Pure Gluten Thermoplasticsmentioning

confidence: 99%

“…Samples were prepared by compression molding the gluten-starch-wood composite at 125°C for 30 min. 42 Considerable chemical interactions were observed between MMA, proteins, starch, wood and additives. MMA and gluten and gluten and citric acid were linked together with C–N bonds.…”

Section: Wheat Gluten Blends With Biopolymersmentioning

confidence: 99%

“…The films formed had good barrier properties but were softer and weaker than the films formed using ammonium hydroxide as the solvent. 41,42 Despite the varied options available to develop thermoplastic products from wheat gluten, commercial availability of wheat gluten-based products are almost non-existent. Relatively weaker mechanical properties, poor resistance to aqueous conditions and exposure to environment are some of the major limitations of wheat gluten-based bioplastics.…”

Section: Pure Gluten Thermoplasticsmentioning

confidence: 99%

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Sustainable bioproducts through thermoplastic processing of wheat gluten and its blends

Guna¹,

Touchaleaume

Saulnier

et al. 2021

Journal of Thermoplastic Composite Materials

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Proteins are unique biopolymers extensively used for food and non-food applications. In addition to animal proteins such as poultry feathers that are generated as byproducts, plant proteins such as wheat gluten and soy proteins are also available in large quantities at reasonable cost. Since proteins are inherently non-thermoplastic, they cannot generally be processed by thermal treatments. Further, most proteins do not dissolve in common solvents either. Hence, most of the non-food applications of plant proteins require extensive chemical and physical modifications which increases cost and also reduces the biodegradability of the products developed. However, studies have shown that proteins including wheat gluten and keratin can become thermoplastic under specific conditions, when adequate pressure, heat and moisture are applied. Similarly, proteins can be made thermoplastic after physical or chemical modifications or by using plasticizers and compatibilizers. Based on such modifications, completely biodegradable composites with proteins as matrix and natural fibers as reinforcement and even all protein composites have been developed. Proteins as matrix offer new avenues to obtain sustainable, green composites with unique properties. Wheat gluten is a novel protein that has many distinct properties and characteristic behavior. Wheat gluten has been used for several non-food applications mostly by dissolving and solution casting which is a cumbersome process and restricted to only a few types of materials that can be developed. Alternatively, wheat gluten has been made thermoplastic using chemical, physical modifications or a combination of both. Several organic and inorganic additives, crosslinkers and plasticizers have also been added to ensure thermoplastic processing of wheat gluten and to obtain products with properties suitable for commodity applications. In this review, we discuss the processes and possibility of converting wheat proteins into thermoplastic products and as matrix for composites and the properties and applications of the wheat gluten based thermoplastics.

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“…The films formed had good barrier properties but were softer and weaker than the films formed using ammonium hydroxide as the solvent. 41,42…”

Section: Pure Gluten Thermoplasticsmentioning

confidence: 99%

Section: Wheat Gluten Blends With Biopolymersmentioning

confidence: 99%

Section: Pure Gluten Thermoplasticsmentioning

confidence: 99%

See 1 more Smart Citation

Sustainable bioproducts through thermoplastic processing of wheat gluten and its blends

Guna¹,

Touchaleaume

Saulnier

et al. 2021

Journal of Thermoplastic Composite Materials

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“…Wheat gluten mixed with starch (1:1 ratio), grafted with methylmethacrylate, crosslinked with citric acid, and nanofilled with TiO 2 has exhibited excellent thermal stability, water-resistance, and mechanical properties (Baishya et al 2018). In addition, WG can be blended with synthetic wood adhesives.…”

Section: Figmentioning

confidence: 99%

Alkali-treated wheat gluten cross-linked with sodium alginate as a bio-based wood adhesive for interior grade particleboard

Gedara

Chianella

Bhattacharyya

et al. 2021

BioRes

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A bio-based wood adhesive formulation free of formaldehyde and made from alkali-treated wheat gluten (WG) and sodium alginate (SA) was developed. Its formulation was optimised, and it was characterised by Fourier Transform Infrared (FT-IR) spectroscopy. The bio-adhesive was utilized to make particleboards both with virgin wood particles and recycled wood particles. A dry bio-adhesive content of 35% (w/w) was used to make samples with both type of particles. Single-layer samples of 10 mm thickness were obtained using wood particles of 1 mm (both virgin and recycled). These samples then were subjected to 3-point bending tests. Whereas the bending strength of samples made with recycled wood particles was 18.09 N/m2 and therefore satisfied Type 18 of the Japanese industrial standards (JIS A 5908:2015), the bending strength of the samples made with virgin wood particles was 8.08 N/m2 and satisfied ‘Type 8 Base particleboard Decorative particleboard’ of the Japanese standards. The density of particleboard samples made from recycled wood particles was 916 kg/m3, while that of samples made from virgin wood particles was 732 kg/m3. The alkali-treated WG and SA bio-adhesive has the potential to be used to re-manufacture particleboards, which can then be recycled and not disposed in landfills.

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“…Wheat gluten (WG) is a potential alternative to synthetic petroleum‐based plastics for several reasons: It is biobased and biodegradable, has attractive mechanical properties, good film‐forming properties, and excellent oxygen‐barrier properties in dry conditions, and is available as a co‐product from starch and ethanol‐biofuel production. [ 1–13 ] Because of the latter, it is available at a comparatively low price and with a low variation in quality. [ 2,14 ] It is also not expected to yield the same microplastic problems as those found with today's plastics.…”

Section: Introductionmentioning

confidence: 99%

Design of Hygroscopic Bioplastic Products Stable in Varying Humidities

Liu

Bettelli

Wei

et al. 2023

Macro Materials & Eng

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Hygroscopic biopolymers like proteins and polysaccharides suffer from humidity‐dependent mechanical properties. Because humidity can vary significantly over the year, or even within a day, these polymers will not generally have stable properties during their lifetimes. On wheat gluten, a model highly hygroscopic biopolymer material, it is observed that larger/thicker samples can be significantly more mechanically stable than thinner samples. It is shown here that this is due to slow water diffusion, which, in turn, is due to the rigid polymer structure caused by the double‐bond character of the peptide bond, the many bulky peptide side groups, and the hydrogen bond network. More than a year is required to reach complete moisture saturation (≈10 wt.%) in a 1 cm thick plate of glycerol‐plasticized wheat gluten, whereas this process takes only one day for a 0.5 mm thick plate. The overall moisture uptake is also retarded by swelling‐induced mechanical effects. Hence, hygroscopic biopolymers are better suited for larger/thicker products, where the moisture‐induced changes in mechanical properties are smeared out over time, to the extent that the product remains sufficiently tough over climate changes, for example, throughout the course of a year.

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Effects of wheat gluten protein on the properties of starch based sustainable wood polymer nanocomposites

Cited by 20 publications

References 60 publications

Sustainable bioproducts through thermoplastic processing of wheat gluten and its blends

Sustainable bioproducts through thermoplastic processing of wheat gluten and its blends

Alkali-treated wheat gluten cross-linked with sodium alginate as a bio-based wood adhesive for interior grade particleboard

Design of Hygroscopic Bioplastic Products Stable in Varying Humidities

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