Jafarzadeh Shima, Alias Abd Karim, Ariffin Fazilah, Mahmud Shahrom, Najafi Ali, Ahmad Mehraj
Food Biopolymer Research Group, Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia, 11800 Minden, Penang Malaysia.
Nano Optoelectronic Research (NOR) Lab, School of Physics, Universiti Sains Malaysia, 11800 Minden, Penang Malaysia.
J Food Sci Technol. 2017 Jan;54(1):105-113. doi: 10.1007/s13197-016-2441-3. Epub 2017 Jan 9.
This study aimed to provide novel biopolymer-based antimicrobial films as food packaging that may assist in reducing environmental pollution caused by the accumulation of synthetic food packaging. The blend of ZnO nanorods (ZnO-nr) and nanokaolin in different ratios (1:4, 2:3, 3:2 and 4:1) was incorporated into semolina, and nanocomposite films were prepared using solvent casting. The resulting films were characterized through field-emission scanning electron microscopy and X-ray diffraction. The mechanical, optical, physical, and antimicrobial properties of the films were also analyzed. The water vapor permeability of the films decreased with increasing ZnO-nr percentage, but their tensile strength and modulus of elasticity increased with increasing nanokaolin percentage. The UV transmittance of the semolina films were greatly influenced by an increase in the amount of ZnO-nr. The addition of ZnO-nr: nanokaolin at all ratios (except 1:4) into semolina reduced UV transmission to almost 0%. Furthermore, the ZnO-nr/nanokaolin/semolina films exhibited a strong antimicrobial activity against . These properties suggest that the combination of ZnO-nr and nanokaolin are potential fillers in semolina-based films to be used as active packaging for food and pharmaceuticals.
本研究旨在提供新型的基于生物聚合物的抗菌薄膜作为食品包装材料，这可能有助于减少因合成食品包装积累而造成的环境污染。将不同比例（1:4、2:3、3:2和4:1）的氧化锌纳米棒（ZnO-nr）和纳米高岭土混合物掺入粗面粉中，并采用溶液浇铸法制备纳米复合薄膜。通过场发射扫描电子显微镜和X射线衍射对所得薄膜进行表征。还分析了薄膜的机械、光学、物理和抗菌性能。薄膜的水蒸气透过率随ZnO-nr百分比的增加而降低，但其拉伸强度和弹性模量随纳米高岭土百分比的增加而增加。粗面粉薄膜的紫外线透过率受ZnO-nr含量增加的显著影响。在所有比例（1:4除外）下，向粗面粉中添加ZnO-nr:纳米高岭土可将紫外线透过率降低至几乎为0%。此外，ZnO-nr/纳米高岭土/粗面粉薄膜对……表现出强大的抗菌活性。这些特性表明，ZnO-nr和纳米高岭土的组合是粗面粉基薄膜中用作食品和药品活性包装的潜在填料。
