Effectiveness of chitosan‐based coating in improving shelf‐life of eggs

Abstract

Despite eggs having a natural packaging -shell -they are perishable and can lose their quality during storage. Chitosan-based coatings were applied to shell eggs to examine potential effects on egg quality properties (weight loss, Haugh unit, yolk index) during 4 weeks of storage. Mineral amounts in yolks were also evaluated after 4 weeks of storage. Three chitosan-based coatings produced with organic acids (acetic-(C-AA), lactic-(C-LA), and propionic (C-PA)) were evaluated on shelf-life enhancements of fresh egg quality. All chitosan-coated eggs showed greater interior quality than the non-coated eggs. The coatings significantly maintained weight loss compared to the control specimen (4.96%). Lower weight loss (3.45% for C-PA, 3.53% for C-LA) was observed in the coated eggs. Eggshell chitosan coat containing lactic and propionic acids maintained higher Haugh unit and yolk index than eggs coated with acetic acid. Uncoated (UC) eggs changed from grade 'A' to 'B' after 1 week of storage. Chitosan-based coating containing lactic and propionic acids maintained eggs in grade 'A' for 4 weeks. Haugh unit showed that C-LA and C-PA effectively maintained eggs at grade 'A' quality for at least 3 weeks more than control and 1 week more than C-AA. Results also indicated that the chitosan coating maintained mineral amounts at nutritional values (especially calcium, iron and magnesium concentration) in yolks after 4 weeks storage.

Chitosan coating minimises eggshell breakage and improves egg quality

“…18 -20 Application of chitosan coatings is promising in order to slow mass transfer rate, improve the quality and extend the storage life of foods. 20 In previous studies 11 it was confirmed that the use of coating with chitosan containing various organic acids enhanced shelf life during storage. However, none of the previous studies provided information on shell strength and albumin viscosity after applying the coatings.…”

“…The solution was stirred with low heat for 15 min until the plasticiser was completely dispersed. 11,17 After washing with water, dried eggs were immersed in the chitosan coating solutions by hand for 1 min, repeated one more time (second layers of coatings) and than dried (by turning them from time to time) at ambient temperature for 24 h. The eggs were placed in open-moulded paper pulp containers holding 30 eggs per tray obtained from a local commercial egg packaging facility, and then stored at ambient laboratory conditions (around 25…”

Chitosan Nanoparticles for Generating Novel Systems for Better Applications: A Review

“…Chitosan is known to form nanocomposites with montmorillonite (MMT) and represent an excellent sorbent material [106]. These chitosan-based composites films and coating provide promising advantage for food packaging industry due to their ability to support the shelf life of food products [107][108][109].…”

Modification and Characterization of Chitosan Films Using 3-trimethoxyl Silyl Propylmethacrylate

“…Chitosan sponges are used in dressings and to stop bleeding of mucous membranes. Chitosan fibers are used as resorbable sutures, non-wovens for dressings, and as drug carriers in the form of hollow fibers (8,(14)(15). Research has been also carried out to use composites made of chitin nanofibrils and chitosan glycolate as wound medicaments (16).…”

“…These biopolymers are biorenewable, biodegradable and biofunctional (7)(8)(9). A great deal of research has been done using chitosan in different fields (10)(11)(12)(13)(14)(15). The presence of active groups in chitosan molecules allows easy chemical modification.…”