Properties and microstructure of protein-based film from round scad (Decapterus maruadsi) muscle as affected by palm oil and chitosan incorporation.
The properties of protein-based film prepared from round scad (Decapterus maruadsi) muscle in the absence and the presence of palm oil and/or chitosan were investigated. Films added with 25% palm oil (as glycerol substitiution) had the slight decrease in water vapor permeability (WVP) and elongation at break (EAB) (p<0.05). WVP and tensile strength (TS) of films increased but EAB decreased when 10-40% chitosan (as protein substitution) was incorporated (p<0.05). Hydrophobic interactions and hydrogen bonds, together with disulfide and non-disulfide covalent bonds, played an important role in stabilizing the film matrix. The a* and b*-values increased with increasing chitosan levels (p<0.05). Films added with chitosan were less transparent and had the lowered transmission in the visible range. The incorporation of 25% palm oil and 40% chitosan yielded the films with the improved TS but decreased water vapor barrier property. Apart from film strengthening effect, chitosan inconjunction with Tween-20 most likely functioned as the emulsifier/stabilizer in film forming solution containing palm oil.
Prodpran
Thummanoon
T
Department of Material Product Technology, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand. thummanoon.p@psu.ac.th
Benjakul
Soottawat
S
Artharn
Anuchit
A
D000818:Animals; D048271:Chitosan / Q000494:pharmacology*; D004655:Emulsions; D009124:Muscle Proteins / Q000737:chemistry / Q000502:physiology; D018482:Muscle, Skeletal / Q000187:drug effects* / Q000648:ultrastructure*; D000073878:Palm Oil; D010473:Perciformes; D010539:Permeability; D010938:Plant Oils / Q000494:pharmacology*; D013718:Tensile Strength; D014867:Water
D004655:Emulsions; D009124:Muscle Proteins; D010938:Plant Oils; D014867:Water; D000073878:Palm Oil; D048271:Chitosan