Prodpran Thummanoon, Benjakul Soottawat, Artharn Anuchit
Department of Material Product Technology, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.
Int J Biol Macromol. 2007 Dec 1;41(5):605-14. doi: 10.1016/j.ijbiomac.2007.07.020. Epub 2007 Aug 6.
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.
研究了在不存在和存在棕榈油和/或壳聚糖的情况下，用圆鲹（Decapterus maruadsi）肌肉制备的蛋白质基薄膜的性能。添加25%棕榈油（作为甘油替代物）的薄膜的水蒸气透过率（WVP）和断裂伸长率（EAB）略有下降（p<0.05）。当加入10-40%壳聚糖（作为蛋白质替代物）时，薄膜的WVP和拉伸强度（TS）增加，但EAB下降（p<0.05）。疏水相互作用、氢键以及二硫键和非二硫键共价键在稳定薄膜基质中起重要作用。a值和b值随壳聚糖含量的增加而增加（p<0.05）。添加壳聚糖的薄膜透明度较低，在可见光范围内的透光率降低。加入25%棕榈油和40%壳聚糖可使薄膜的TS提高，但水蒸气阻隔性能下降。除了薄膜增强作用外，壳聚糖与吐温-20一起最有可能在含有棕榈油的成膜溶液中起乳化剂/稳定剂的作用。
