Characterization of zein modified with a mild cross-linking agent

Kim, S.; Sessa, David J.; Lawton, John W.

doi:10.1016/j.indcrop.2003.10.013

Cited by 93 publications

(68 citation statements)

References 9 publications

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“…On the other hand, although oleic acid was not a good plasticizer for cast zein films, it showed some plasticizing effect (with 12% elongation) when films were obtained from stretched resins formed by zein-oleic acid emulsions (Lai & Padua, 1997). Kim et al (2004) reduced the brittleness of zein films and increased their tensile strengths by using some chemical crosslinkers such as 1-[3-dimethylaminopropyl]-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide, but this process did not increase the film elongation considerably (increased only from 2.23 to 3.6%). Sessa et al (2008) improved tensile strength, elongation and Young's modulus of zein films by glutaraldehyde crosslinking, but the films lost their edible nature due to toxicity of this compound.…”

Section: Effect Of Phenolic Compounds On Mechanical Properties Of Filmsmentioning

confidence: 99%

“…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%

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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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Section: Effect Of Phenolic Compounds On Mechanical Properties Of Filmsmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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“…The commonly used crosslinking agents are aldehydes such as glutaraldehyde and formaldehyde [25][26][27] or carbodiimides such as dicyclohexyl carbodiimide (DDC) and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) [26][27][28][29][30][31][32][33][34][35]. In the literature, carbodiimides, known as noncytotoxic and biocompatible crosslinking agents, have been used to modify the properties of the films made from proteins and/or polysaccharides [26][27][28][29][30][31][32][33][34][35]. Researchers usually reported that the film forming properties, flexibility and tensile strengths of the prepared films were improved after crosslinking.…”

Section: Introductionmentioning

confidence: 99%

Silk fibroin as a novel coating material for controlled release of theophylline

Bayraktar

Malay

Özgarip

et al. 2005

European Journal of Pharmaceutics and Biopharmaceutics

111

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The aim of this study was to explore potential use of the silk fibroin (SF) as an aqueous coating material for theophylline tablets. We have examined the film forming and coating properties of heat-treated fibroin, SF solution having different amounts of polyethylene glycol (PEG) and 1-ethyl-3-(3-dimethyl aminopropyl)carbodiimide (EDC) cross-linked SF. Heat-treated SF material possessed a brittle structure, which resulted in poor film forming and coating properties. The optimum PEG amount in SF solution was determined as 17% (by weight) for an acceptable film forming and zero order release profile. EDC cross-linked SF has shown a very good film forming and coating property with a potential for sustaining the drug release from coated theophylline tablets. Dissolution data for coated theophylline tablets were analyzed using Ritger and Peppas equation to describe the mechanism of drug release. Drug release from the EDC coated tablets followed zero-order kinetics. Release rate constants were found to be 0.26, 0.19, 0.16% min K1 for single-coated, double coated, and triple coated tablets, respectively. These results clearly demonstrated that silk fibroin has high utility as a novel aqueous coating material for controlled release products. q

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“…However, zein is deficient in lysine and tryptophan, which results in poor nutritional properties, so further application of zein has been hindered in food products. However, it has been widely studied for application in biodegradable packaging materials (Kim et al 2004). Although zein has a long history of being used as a coating for candies, fruits, nuts, and other encapsulated drugs and foods (Biswas et al 2009), the shortcomings of zein-based materials still limit other applications of zein films (Chen et al 2006;Gao et al 2007;Zhong et al 2008).…”

mentioning

confidence: 99%

Effect of microwave modification on mechanical properties and structural characteristics of soy protein isolate and zein blended film

Wang¹,

Gao²,

Wang³

et al. 2016

Czech J. Food Sci.

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Wang N., Gao Y.Z., Wang P., Yang S., Xie T.M., Xiao Z.G. (2016): Effect of microwave modification on mechanical properties and structural characteristics of soy protein isolate and zein blended film. Czech J. Food Sci., 34: 180-188.Soy protein isolate (SPI) and zein were blended at different ratios, and native and microwave-modified films were prepared at pH 12 in an ethanol/water (20 : 80) mixture. The effect of the microwave modification on the mechanical properties and structural characteristics of the SPI and zein blended films was investigated. The results show that the microwave-modified blended film of 3 : 1 SPI-zein demonstrated the best mechanical properties: the highest breaking strength (2900 g) and the highest fracturing distance (16.08 mm). The morphology of the microwave-modified film was more homogeneous and had fewer pinholes than the zein-only film. In addition, the glass transition temperature of the microwave-modified film rose by nearly half compared to the zein-only film, while the melting temperature increased by almost 2.5%. The secondary structure analysis indicates that a moderate amount of microwave treatment will promote a decrease in α-helix, β-turn, and random coil content and an increase in β-sheet content. This study provides an edible material with better flexibility for food packaging.

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Characterization of zein modified with a mild cross-linking agent

Cited by 93 publications

References 9 publications

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

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

Silk fibroin as a novel coating material for controlled release of theophylline

Effect of microwave modification on mechanical properties and structural characteristics of soy protein isolate and zein blended film

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