School of Medicine, Gonabad University of Medical Sciences, Gonabad, P.O. Box: 9691983643, Iran.
Department of Food Chemistry, Research Institute of Food Science and Technology, Mashhad-Quchan Highway, Mashhad, Iran.
Carbohydr Polym. 2017 Aug 1;169:524-532. doi: 10.1016/j.carbpol.2017.04.011. Epub 2017 Apr 7.
The impact of montmorillonite (MMT) as a nanofiller at different concentrations (5, 10, 15wt.%) on the physicochemical and functional properties of nanocomposite film based on soluble soybean polysaccharide (SSPS) was investigated. The results showed that an increase in MMT concentration was accompanied by a decrease in water solubility, thickness, and elongation at break. Furthermore, tensile strength increased when MMT concentration was increased to 10wt.%. Atomic force and scanning electron micrographs showed a significant agglomeration at MMT 15wt.%. With added MMT, the level of whiteness, greenness, and yellowness of SSPS film increased (P<0.05). Dynamic mechanical thermal analysis indicated that the storage modulus of nanocomposites increased when the MMT was increased to 10wt.%. Furthermore, Fourier transform infrared spectrophotometry demonstrated that no considerable changes occurred in the functional groups of the SSPS when MMT was added. Antimicrobial tests revealed that antibacterial and anti-mold activities were unlikely from reinforced nanocomposites.
研究了不同浓度（5、10、15wt.%）的蒙脱土（MMT）作为纳米填料对基于可溶性大豆多糖（SSPS）的纳米复合膜的物理化学和功能特性的影响。结果表明，随着 MMT 浓度的增加，其水溶性、厚度和断裂伸长率降低。此外，当 MMT 浓度增加到 10wt.%时，拉伸强度增加。原子力和扫描电子显微镜显示在 MMT 15wt.%时存在明显的团聚。加入 MMT 后，SSPS 膜的白度、绿色度和黄色度增加（P<0.05）。动态力学热分析表明，当 MMT 增加到 10wt.%时，纳米复合材料的储能模量增加。此外，傅里叶变换红外光谱表明，加入 MMT 后 SSPS 的功能基团没有发生明显变化。抗菌试验表明，增强型纳米复合材料不太可能具有抗菌和防霉活性。
