IRTA, Finca Camps i Armet, E- 17121 Monells, Girona, Spain.
J Food Sci. 2010 Oct;75(8):E502-7. doi: 10.1111/j.1750-3841.2010.01785.x. Epub 2010 Sep 20.
Antimicrobial films were prepared by including enterocins to alginate, polyvinyl alcohol (PVOH), and zein films. The physical performance of the films was assessed by measuring color, microstructure (SEM), water vapor permeability (WVP), and tensile properties. All studied biopolymers showed poor WVP and limited tensile properties. PVOH showed the best performance exhibiting the lowest WVP values, higher tensile properties, and flexibility among studied biopolymers. SEM of antimicrobial films showed increased presence of voids and pores as a consequence of enterocin addition. However, changes in microstructure did not disturb WVP of films. Moreover, enterocin-containing films showed slight improvement compared to control films. Addition of enterocins to PVOH films had a plasticizing effect, by reducing its tensile strength and increasing the strain at break. The presence of enterocins had an important effect on tensile properties of zein films by significantly reducing its brittleness. Addition of enterocins, thus, proved not to disturb the physical performance of studied biopolymers. Development of new antimicrobial biodegradable packaging materials may contribute to improving food safety while reducing environmental impact derived from packaging waste. Practical Application: Development of new antimicrobial biodegradable packaging materials may contribute to improving food safety while reducing environmental impact derived from packaging waste.
抗菌薄膜是通过将肠菌素加入海藻酸钠、聚乙烯醇（PVOH）和玉米醇溶蛋白薄膜中制备的。通过测量颜色、微观结构（SEM）、水蒸气透过率（WVP）和拉伸性能来评估薄膜的物理性能。所有研究的生物聚合物的 WVP 都很差，拉伸性能有限。PVOH 表现出最好的性能，其 WVP 值最低、拉伸性能最高、柔韧性也最好。抗菌薄膜的 SEM 显示，由于肠菌素的添加，存在更多的空隙和孔隙。然而，微观结构的变化并没有干扰薄膜的 WVP。此外，与对照薄膜相比，含肠菌素的薄膜略有改善。肠菌素的加入对 PVOH 薄膜具有增塑作用，降低了其拉伸强度，增加了断裂伸长率。肠菌素的存在对玉米醇溶蛋白薄膜的拉伸性能有重要影响，显著降低了其脆性。因此，肠菌素的加入并没有干扰研究生物聚合物的物理性能。开发新型抗菌可生物降解包装材料可能有助于提高食品安全，同时减少包装废物带来的环境影响。
开发新型抗菌可生物降解包装材料可能有助于提高食品安全，同时减少包装废物带来的环境影响。
