Mariana B. Osuna, Ariel Michaluk, Ana M. Romero, María A. Judis, Nora C. Bertola
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引用次数: 1
摘要
本研究的目的是分析蜜蜂蜂蜜对乳清分离蛋白(WPI)薄膜的机械、物理化学和光学性质的塑化作用,并将所得结果与甘油对WPI薄膜的塑化作用进行比较。利用响应面优化WPI和甘油的用量,得到拉伸强度高、伸长率适中、透气性低的薄膜,作为参考膜。加入不同浓度(60%、80%和100%)的蜂蜜/100 g WPI,作为WPI膜的增塑剂。与甘油增塑膜相比,蜂蜜含量的增加使TS降低20±10至48±0.5%,杨氏模量(100%蜂蜜的wpi膜)降低66±0.5%,100%蜂蜜的wpi膜的断裂伸长率增加186±11%。蜂蜜塑化WPI膜对水蒸气的渗透性比甘油塑化WPI膜低29±11% ~ 43±3%。80%蜂蜜配方的力学特性与对照膜无显著差异(p > 0.05)。本研究结果表明,蜂蜜在wpi薄膜中具有很大的增塑剂潜力。
Plasticizing effect of Apis mellifera honey on whey protein isolate films
The aims of this study were to analyze the plasticizing effect of Apis mellifera honey on the mechanical, physicochemical and optical properties of whey protein isolate (WPI) films and to compare the results collected with the plasticizing effect of glycerol on WPI-films. Response surface was applied to optimize the amounts of WPI and glycerol in order to obtain films with higher tensile strength (TS), moderate elongation, and lower water vapor permeability so that they could be used as reference films. Honey was added at different concentrations (60%, 80%, and 100%) of g honey/100 g WPI, as a plasticizer to the WPI-films. In comparison to glycerol-plasticized films, an increase in the percentage of honey produced a reduction of 20 ± 10 to 48 ± 0.5% of TS, a 66 ± 0.5% lower in Young's modulus (WPI-films with 100% honey), and an increase of 186 ± 11% in elongation at break in the WPI-films with 100% honey. Honey-plasticized WPI-films were from 29 ± 11 to 43 ± 3% less permeable to water vapor than glycerol-plasticized WPI films. The mechanical characteristics of the 80% honey formulation did not differ significantly from those of the reference film (p > 0.05). Findings from this study indicate that honey has great potential as a plasticizer in WPI-films.
期刊介绍:
Founded in 1963, Biopolymers publishes strictly peer-reviewed papers examining naturally occurring and synthetic biological macromolecules. By including experimental and theoretical studies on the fundamental behaviour as well as applications of biopolymers, the journal serves the interdisciplinary biochemical, biophysical, biomaterials and biomedical research communities.