Noshirvani Nooshin, Ghanbarzadeh Babak, Mokarram Reza Rezaei, Hashemi Mahdi, Coma Véronique
Department of Food Science and Technology, Faculty of Agriculture, Tabriz University, P.O. Box 51666-16471, Tabriz, Iran.
Department of Food Science and Technology, Faculty of Agriculture, Tabriz University, P.O. Box 51666-16471, Tabriz, Iran.
Int J Biol Macromol. 2017 Jun;99:530-538. doi: 10.1016/j.ijbiomac.2017.03.007. Epub 2017 Mar 4.
Active nanocomposites based on carboxymethyl cellulose-chitosan-oleic acid (CMC-CH-OL) incorporated with different concentrations (0.5-2wt.%) of zinc oxide nanoparticles (ZnO NPs) were produced by casting method. The effects of ZnO NPs on the morphological, mechanical, thermal, physical and antifungal properties of the films were studied. New interaction between ZnO NPs and polymer matrix were confirmed by Fourier Transform infrared. After addition of ZnO NPs, tensile strength, lightness (L*) and thermal stability decreased however, elongation at break, contact angle, a* (greenness) and b* (yellowness) of the nanocomposite films increased in comparison to the films without nano-filler. UV transmittance at 280nm decreased from 17.3% to 0.2, 0.1 and 0.1 for the nanocomposite films containing 0.5, 1 and 2wt.% ZnO NPs, respectively, suggesting higher UV blocking properties. Disc diffusion test showed considerable antifungal properties of the active nanocomposite films against Aspergillus niger, especially in CMC-CH-OL-ZnO 2wt.% by more than 40% fungal growth inhibition.
采用流延法制备了基于羧甲基纤维素 - 壳聚糖 - 油酸（CMC - CH - OL）并掺入不同浓度（0.5 - 2wt.%）氧化锌纳米颗粒（ZnO NPs）的活性纳米复合材料。研究了ZnO NPs对薄膜的形态、机械、热、物理和抗真菌性能的影响。通过傅里叶变换红外光谱证实了ZnO NPs与聚合物基体之间的新相互作用。添加ZnO NPs后，纳米复合薄膜的拉伸强度、亮度（L*）和热稳定性降低，然而，与无纳米填料的薄膜相比，纳米复合薄膜的断裂伸长率、接触角、a*（绿色度）和b*（黄色度）增加。含0.5、1和2wt.% ZnO NPs的纳米复合薄膜在280nm处的紫外线透过率分别从17.3%降至0.2%、0.1%和0.1%，表明其具有更高的紫外线阻隔性能。纸片扩散法测试表明活性纳米复合薄膜对黑曲霉具有显著的抗真菌性能，特别是在CMC - CH - OL - ZnO 2wt.%时，真菌生长抑制率超过40%。
