Preparation, characterization and antibacterial activity of biodegradable films prepared from carrageenan

Abstract

Carrageenan films have been formulated as a packaging material. Films plasticized with glycerol were loaded with citric acid (1, 0.75, 0.5, 0.25 and 0.1 %) for enhanced antimicrobial effects. Blank and citric acid loaded films were characterized by mechanical properties, scanning electron microscopy and contact angle. In addition, swelling and antibacterial studies were conducted to further characterize the films. Both blank and citric acid loaded films showed different morphology, high elasticity and acceptable tensile (mechanical) properties. These citric acid loaded films p r o d u c e d h i g h e r z o n e s o f i n h i b i t i o n a g a i n s t Staphylococcus aureus, Proteus mirabilis, Pseudomonas aeruginosa, Escherichia coli and Dickeya chrysanthemi strains compared to blank film.

A Review of Property Enhancement Techniques for Carrageenan-based Films and Coatings

“…Similarly, as in the case of ι-carrageenan, -carrageenan polymers exhibit a compact film structure (El-Fawal, 2014;Nanaki et al, 2010), and the high gelling ability of κ-carrageenan imparts excellent film-forming properties (Wu & Imai, 2012) with higher mechanical and water barrier properties, as well as greater transparency (Park, 1996;Paula et al, 2015). Table 1 lists Larotonda et al (2016) OP: Oxygen permeability; SR: semi-refined; LDPE: Low-density polyethylene; HDPE: High-density polyethylene…”

“…The purpose of this approach is to protect food products from microbial growth, particularly from surface spoilage, thus prolonging the shelf-life, and maintaining the safety and quality of the foodstuff contained in the package (Choi et al, 2005;Hotchkiss, 1997). Such is the case with the development of carrageenan-based films where several AM agents have been incorporated into the matrix including organic acids (El-Fawal, 2014;Wibowo et al, 2016), essential oils (Shojaee-Aliabadi et al, 2013), natural extract AM compounds (Kanmani & Rhim, 2014a), and metallic oxides (Oun & Rhim, 2017). Schreiber, 2012).…”

“…In such cases, edible films or coatings may be the best concept for this type of AM packaging. However, the incorporation of organic acids such as citric acid into the carrageenan polymer structure appears to lessen its mechanical properties along with its water resistance (El-Fawal, 2014;Fouda et al, 2015). Hauser et al (2016) suggested that to obtain desirable properties of the films that incorporate organic acids, the compatibility of the organic acids with the polymer and its constituents, the thickness of the film, and the storage conditions all have to be taken into consideration.…”

Evaluation of antimicrobial and antioxidant activities for cellulose acetate films incorporated with Rosemary and Aloe Vera essential oils

“…Economically suitable biodegradable polymers which can be simply formed into different shapes are the better reply to this issue. Over the past years, there are many bio-based polymers were used in food-related packaging (El-Fawal 2014). Cellulose represents one of those polymers which is renewable and widely available in large quantities from various plant sources (Voicu et al 2016).…”

Evaluation of cytotoxicity and antimicrobial activity of an injectable bone substitute of carrageenan and nano hydroxyapatite

“…According to their research findings, however, the mechanism by which cell death occurs is not well known. Potentially, the union of these chains to the surface of the bacteria produces structural changes in the membrane, increasing the permeability and leading to bacterial death …”