Yekta Reza, Mirmoghtadaie Leila, Hosseini Hedayat, Norouzbeigi Sahar, Hosseini Seyede Marzieh, Shojaee-Aliabadi Saeedeh
Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Int J Biol Macromol. 2020 Apr 9;158:327-337. doi: 10.1016/j.ijbiomac.2020.04.021.
Althaea rosea flowers were used to procure the gum (ARG) needed for film preparation. Pretest studies suggested 1.5% ARG + 50% glycerol as optimum for film preparation. The reinforcement impact of 3, 5, and 8 wt% bacterial nanocrystalline cellulose (BNC) incorporation (based on the dry weight of ARG) was investigated on the structural, mechanical, physical, thermal, optical, morphological, and barrier properties of films. The Results suggested that increasing the BNC concentration until a certain level (5 wt% BNC) could improve the latter properties. However, at higher concentration (8 wt% BNC), cellulose nanoparticles tended to agglomerate, which led to the impairment of some of those properties, especially barrier properties. According to AFM and SEM results, BNC addition increased surface roughness and coarseness. All BNC-loaded films showed better functions compared to control sample (0 wt% BNC) and the film containing 5 wt% BNC was suggested as the optimum film.
蜀葵花朵被用于获取制备薄膜所需的树胶（ARG）。预试验研究表明，1.5% ARG + 50%甘油是制备薄膜的最佳配方。研究了掺入3%、5%和8%重量比的细菌纳米晶纤维素（BNC）（基于ARG的干重）对薄膜的结构、机械、物理、热学、光学、形态和阻隔性能的增强影响。结果表明，将BNC浓度增加到一定水平（5%重量比的BNC）可以改善后者的性能。然而，在较高浓度（8%重量比的BNC）下，纤维素纳米颗粒趋于团聚，这导致其中一些性能受损，尤其是阻隔性能。根据原子力显微镜（AFM）和扫描电子显微镜（SEM）结果，添加BNC增加了表面粗糙度和粗糙度。与对照样品（0%重量比的BNC）相比，所有负载BNC的薄膜都表现出更好的性能，含5%重量比BNC的薄膜被认为是最佳薄膜。
