Multi-material multilayer plastic packaging (MMPP) is widely applied in fast moving consumer goods (FMCG) combining functionalities of distinct materials. These structures can enhance properties, such as resource-use efficiency and barrier performance leading to consequential benefits like a prolonged shelf-life. Nevertheless, they represent challenge for existing recycling systems, confronting circular economy principles. This study aim was foresight the future technologies MMPP next five...

ABSTRACT For a number of applications, gluten protein polymer structures are the highest importance in determining end‐use properties. The present article focuses on wheat grain, genotype‐ and environment‐related changes, various their impact quality. Protein mature grain or flour strongly related to properties, although influenced by genetic environment interactions. Nitrogen availability during development genetically determined plant rhythm most important parameters structure, temperature...

Mechanical and transport properties were assessed on wheat gluten films with a glycerol content of 25−40%, prepared by compression molding for 5−15 min at temperatures between 90 130 °C. Effects storing the up to 24 days, in 0 50% relative humidity (RH), tensile measurements. The analyzed respect methanol zero-concentration diffusivity, oxygen permeability (OP), water vapor (WVP), Cobb60 sodium dodecyl sulfate (SDS) solubility coupled sonication. SDS diffusivity lower higher temperature....

The mechanical and gas-barrier properties of paper paperboard coated with chitosan–acetic acid salt (chitosan), whey protein isolate, concentrate wheat gluten were studied. Paper sheets solution-coated using a hand applicator. In addition, bi-layer composites or produced by compression moulding, the chitosan solution was also applied on curtain coating. Young's modulus, fracture stress, strain, tearing strength, air permeance oxygen permeability assessed. measurements showed that most...

In order to understand the mechanisms behind undesired aging of films based on vital wheat gluten plasticized with glycerol, cast from water/ethanol solutions were investigated. The effect pH was studied by casting at 4 and 11. aged for 120 days 50% relative humidity 23 degrees C, tensile properties oxygen water vapor permeabilities measured as a function time. changes in protein structure determined infrared spectroscopy size-exclusion reverse-phase high-performance liquid chromatography,...

Abstract Two types of microfibrillated cellulose (MFC) were prepared using either a sulfite pulp containing high amount hemicellulose (MFC 1) or carboxymethylated dissolving 2). MFC gels then combined with amylopectin solutions to produce solvent‐cast MFC‐reinforced films. Tensile testing revealed that 2‐reinforced films exhibited more ductile behavior and 1‐reinforced had higher modulus elasticity (E‐modulus) at loadings 50 wt % higher. Pure relatively low oxygen permeability values when...

This paper presents a novel approach to improve the barrier and mechanical properties of extruded glycerol-plasticized vital wheat gluten sheets. The sheets were with single screw extruder at alkaline conditions using 3−5 wt % NaOH. Salicylic acid (SA), known extrudability gluten, was also added alone or in combination Oxygen transmission rate volatile mass measurements, tensile tests, protein solubility, glycerol migration, infrared spectroscopy, electrophoresis used assess extrudate....

Evaluation of structure and morphology extruded wheat gluten (WG) films showed WG protein assemblies elucidated on a range length scales from nano (4.4 Å 9 to 10 Å, up 70 Å) micro (10 μm). The presence NaOH in induced tetragonal with unit cell parameters, = 51.85 c 40.65 whereas NH(4)OH resulted bidimensional hexagonal close-packed (HCP) lattice parameter Å. In the NH(4)OH, highly polymerized pattern intimately mixed glutenins gliadins bounded through SH/SS interchange reactions was found. A...

Wheat gluten (WG) and its components, gliadin glutenin proteins, form the largest polymers in nature, which complicates structural architecture of these proteins. gluten, proteins unmodified showed few secondary features. Structural modification using heat, pressure chemical chaperone glycerol resulted a shift to organized structure. In modified gliadin, nano-structural molecular arrangements hexagonal closed packed (HCP) assemblies with lattice parameter (58 Å) were obvious together...

The properties of new and aged glycerol-plasticized vital wheat gluten films containing ≤4.5 wt % natural or quaternary ammonium salt modified montmorillonite clay were investigated. cast from pH 4 11 ethanol/water solutions. films, for ≤120 days, characterized by tensile testing, X-ray diffraction, transmission electron microscopy. In addition, water vapor permeability (11% relative humidity) the content volatile components measured. large reduction in with respect to pristine polymer...

This report presents a new route to enhance the wet properties of chitosan−acetic-acid−salt films using microfibrillated cellulose (MFC). The enhancement makes it easier form into various shapes at room temperature in state. Chitosan with MFC was compared well-known buffer treatment. It observed that containing 5 wt % were visually identical buffered/unbuffered without MFC. Field-emission scanning electron microscopy indicated formed network uniformly distributed fibrils and fibril bundles...

Films thermoformed from commercial potato protein concentrate exhibited a constant Young's modulus and increasing strain at break with processing temperature, in contrast to the usually observed behaviour for protein-based materials.

This article describes nanocomposite films with separately grown protein nanofibrils (PNFs) in a nonfibrillar matrix from the same starting material (whey). Tensile tests on glycerol-plasticized indicate an increased elastic modulus and decreased extensibility increasing content of PNFs, although are still ductile at maximum PNF (15 wt %). Infrared spectroscopy confirms that strongly hydrogen-bonded β-sheets PNFs retained composites. The appear PNF-induced undulated upper surface. It is...

The temperature window for the extrusion of glycerol-plasticized wheat gluten was increased by use salicylic acid, a known scorch retarder and radical scavenger. It possible to extrude 30 wt % glycerol−wheat films with die-head as high 135 °C, rather than 95 incorporating only 1 acid. Small effects shear-induced heating during at higher temperatures suggested that acid acted lubricant viscosity reducer. latter originate primarily from salicylic-acid-induced reduction in degree protein...

Laminates of compression-molded glycerol-plasticized wheat gluten (WG) films surrounded and supported by poly(lactic acid) (PLA) have been produced characterized. The objective was to obtain a fully renewable high gas barrier film with sufficient mechanical integrity function in, for example, extrusion-coating paper/board applications. It shown that the lamination made it possible make broad range glycerol contents (0−30 wt %) greater strength than single unsupported WG films. low...

This is, to our knowledge, the first success on solvent-free extrusion of wheat gluten (WG) into high quality films without using NaOH/salicylic acid. It was possible by urea (concentrations: 10, 15 and 20 wt%) in single screw-extruder process. Tensile testing, oxygen permeability, water vapor transmission rate, infrared spectroscopy (IR), confocal laser scanning microscopy (CLSM) protein solubility were used assess properties extrudates. As concentration increased, strength stiffness...