Properties and characteristics of nanocomposite films from tilapia skin gelatin incorporated with ethanolic extract from coconut husk

Abstract

Impacts of ethanolic extract from coconut husk (EECH) at 0-0.4 % (w/w, on protein basis) on properties of films from tilapia skin gelatin and gelatin/Cloisite Na + nanocomposite films were investigated. Young's Modulus, tensile strength and elongation at break of both films decreased with addition of EECH (P<0.05). The lowest water vapour permeability (WVP) was obtained for gelatin film containing 0.05 % EECH (w/w) (P<0.05). Nevertheless, the nanocomposite film showed the lowest WVP when incorporated with 0.4 % EECH (w/w) (P<0.05). Generally, L*-value (lightness) decreased and a*-value (redness) of films increased (P<0.05) with increasing levels of EECH, regardless of nanoclay incorporation. Transparency of both films generally decreased as the level of EECH increased (P<0.05). Intercalated or exfoliated structure of nanocomposite films was revealed by wide angle X-ray diffraction (WAXD) analysis. Based on scanning electron microscopic (SEM) analysis, the rougher surface was found when EECH was added. EECH had varying impact on thermal stability of films as revealed by thermogravimetric (TGA) and differential scanning calorimetric (DSC) analyses. Thus, the incorporation of EECH determined the properties of both gelatin film and nanocomposite film in which the improved water vapour barrier property could be obtained.

Effect of Incorporation Nanocrystalline Corn Straw Cellulose and Polyethylene Glycol on Properties of Biodegradable Films

“…SEM can present a clear surface morphology which reflects the homogeneity and morphological structure of polymeric materials (Jafari and others ; Nagarajan and others ). The surface and cross‐section micrographs of different films can be observed from Figure .…”

Cross-Linking Activity of Ethanolic Coconut Husk Extract Toward Sardine (Sardinella albella) Muscle Proteins

“…Extracts from coconut husk have been reported to enhance the properties of nanocomposite films prepared from tilapia skin gelatin (Nagarajan et al . ). Moreover, the use of coconut husk extract at an appropriate level improved the gel properties of gelatin from yellowfin tuna swim bladder (Kaewdang et al .…”

Characterization of casein and casein-silver conjugated nanoparticle containing multifunctional (pectin–sodium alginate/casein) bilayer film

“…Films based on polysaccharides (carragenan, pectin, chitosan) are hydrophilic and provides strong hydrogen bonding and so have strong oxygen barrier properties. Being thermoplastic heteropolymers proteins are able to form numerous intermolecular linkages (Chinabhark et al 2007;Nagarajan et al 2015). Amongst all protein, casein based films have received tremendous attention due to their good film forming properties and oxygen barrier properties.…”