Effect of plasticizing sugars on rheological and thermal properties of zein resins and mechanical properties of zein films

Ghanbarzadeh, Babak; Oromiehie, Abdulrasoul; Musavi, Mohamad; Djomeh, Z Emam; Rad, Elhame Razmi; Milani, Jafar Mohammadzadeh

doi:10.1016/j.foodres.2006.05.011

Cited by 82 publications

(64 citation statements)

References 19 publications

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“…As an example zein was plasticized with different contents of sorbitol, glycerol and mannitol [237]. At low plasticizer concentration, the strain at break is similar for sorbitol and glycerol.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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State of the Art in the Development and Properties of Protein-Based Films and Coatings and Their Applicability to Cellulose Based Products: An Extensive Review

et al. 2015

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Abstract:There is increasing research towards the substitution of petrochemicals by sustainable components. Biopolymers such as proteins, polysaccharides, and lipids derive from a variety of crop sources and most promisingly from waste streams generated during their processing by the agro food industry. Among those, proteins of different types such as whey, casein, gelatin, wheat gluten, soy protein or zein present a potential beyond the food and feed industry for the application in packaging. The general protein hydrophilicity promotes a good compatibility to polar surfaces, such as paper, and a good barrier to apolar gases, such as oxygen and carbon dioxide. The present review deals with the development of protein-based coatings and films. It includes relevant discussion for application in paper or board products, as well as an outlook on its future industrial potential. Proteins with suitable functionalities as food packaging materials are described as well as the different technologies for processing the coatings and the current state of the art about the coating formulations for selectively modulating barrier, mechanical, surface and end of life properties. Some insights onto regulations about packaging use, end of life and perspectives of such natural coating for decreasing the environmental impact of packages are given.

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Section: Mechanical Propertiesmentioning

confidence: 99%

“…Other authors [229] found that also the coverage of zein films by flax oil or tung oil increased elongation values. The reason for that might be the filling of pinholes and cracks in the films [237].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

State of the Art in the Development and Properties of Protein-Based Films and Coatings and Their Applicability to Cellulose Based Products: An Extensive Review

et al. 2015

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“…As a result, melt viscosity and viscoelasticity decrease whereas melt flow increases. Lots of research groups have studied the effect of plasticizers on melt processing and melt flow behavior of various polymers [25][26][27]. However, the plasticizer not only influences shear viscosity of the polymer melt, but also the extensional melt properties such as melt strength and melt elongation.…”

Section: Introductionmentioning

confidence: 99%

Extensional Flow Properties of Externally Plasticized Cellulose Acetate: Influence of Plasticizer Content

et al. 2013

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Elongational flow properties of polymer melts are very important for numerous polymer processing technologies such as blown film extrusion or foam extrusion. Rheotens tests were conducted to investigate the influence of plasticizer content on elongational flow properties of cellulose acetate (CA). Triethyl citrate (TEC) was used as plasticizer. Melt strength decreases whereas melt extensibility increases with increasing plasticizer content. Melt strength was further studied as a function of zero shear viscosity. The typical draw resonance of the Rheotens curve shifts to higher drawdown velocity and the amplitude of the draw resonance decreases with increasing TEC content. With respect to foam extrusion, not only are melt strength and melt extensibility important but the elongational behavior at low strain rates and the area under the Rheotens curve are also significant. Therefore, elongational viscosity as well as specific energy input were calculated and investigated with respect to plasticizer content. Preliminary foam extrusion tests of externally plasticized CA using chemical blowing agents confirm the results from rheological characterization.

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“…Although it has excellent film forming and gas barrier properties, the classical brittleness, and flexibility problems of zein films is a great limitation for their use as a free standing film and more widespread application as a coating material. Many studies have been conducted to plasticize zein films and improve their flexibility and mechanical properties by addition of different ingredients such as organic acids, sugars, alcohols, fatty acids and different synthetic polymers, cross-linkers or plasticizers (Ghanbarzadeh et al, 2006;Kim, Sessa, & Lawton, 2004;Lai & Padua, 1997;Lawton, 2004;Sessa, Mohamed, & Byars, 2008;Woods, Selling, & Cooke, 2009). However, none of these studies provided an effective solution to flexibility and brittleness problems by use of natural bioactive compounds.…”

Section: Introductionmentioning

confidence: 99%

Incorporating phenolic compounds opens a new perspective to use zein films as flexible bioactive packaging materials

Arcan

Yemenicioğlu

2011

Food Research International

193

108

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To eliminate their classical brittleness and flexibility problems zein films were plasticized by incorporation of different phenolic acids (gallic acid (GA), p-hydroxy benzoic acid (HBA) or ferulic acids (FA)) or flavonoids (catechin (CAT), flavone (FLA) or quercetin (QU)). The use of GA, CAT, FA and HBA at 3 mg/cm 2 eliminated the brittleness of films and gave highly flexible films showing elongations between 135% and 189%, while FLA and QU caused no considerable effect on film elongation. The films containing FA and HBA showed extreme swelling and lost their structural integrity when hydrated in distilled water. In contrast, CAT and GA containing films maintained their integrity following hydration. Most of the GA (up to 93%) and a considerable portion of CAT (up to 60%) in the films existed in soluble form. Therefore, the films showed antioxidant and/or antimicrobial activity. The TEACs of soluble phenolic compounds in 3 mg/cm 2 CAT and GA containing films were 21.0 and 86.2 μmol trolox/cm 2 , respectively. The GA containing films showed antimicrobial activity on Listeria monocytogenes and Campylobacter jejuni, while CAT showed no antimicrobial activity on these bacteria at the studied concentration. This work opens a new perspective for using zein in flexible bioactive packaging.

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Effect of plasticizing sugars on rheological and thermal properties of zein resins and mechanical properties of zein films

Cited by 82 publications

References 19 publications

State of the Art in the Development and Properties of Protein-Based Films and Coatings and Their Applicability to Cellulose Based Products: An Extensive Review

State of the Art in the Development and Properties of Protein-Based Films and Coatings and Their Applicability to Cellulose Based Products: An Extensive Review

Extensional Flow Properties of Externally Plasticized Cellulose Acetate: Influence of Plasticizer Content

Incorporating phenolic compounds opens a new perspective to use zein films as flexible bioactive packaging materials

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