多功能壳聚糖纳米纤维/ZnO-AgNPs 的制备及其对羧甲基纤维素基纳米复合膜性能的影响。
Preparation of multifunctional chitin nanowhiskers/ZnO-Ag NPs and their effect on the properties of carboxymethyl cellulose-based nanocomposite film.
机构信息
Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun, Jeonnam, 534-729, Republic of Korea; Food Engineering and Packaging Department, Food Technology Research Institute, Agricultural Research Center, Giza, Egypt.
Center for Humanities and Sciences, and Department of Food and Nutrition, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 120-701, Republic of Korea.
出版信息
Carbohydr Polym. 2017 Aug 1;169:467-479. doi: 10.1016/j.carbpol.2017.04.042. Epub 2017 Apr 22.
Chitin nanowhiskers (ChNW) were isolated and used for the synthesis of hybrid ChNW/ZnO-Ag NPs. The hybrid nanoparticles were used for the preparation of multifunctional carboxymethyl cellulose (CMC) films. A ChNW was needle shape with the width of 8-40nm, the length of 150-260nm, and crystallinity index of 93.6%. The ZnO-Ag NPs were spherical with the diameter of 10.5-16.2nm. STEM, EDX, XRD, and UV-vis analyses confirmed the formation of ZnO-Ag NPs on the surface of ChNW. The thermal stability of ChNW was increased by incorporation of ZnO-Ag NPs. A CMC-based nanocomposite film incorporated with 5wt% of ChNW/ZnO-Ag NPs was homogeneous and showed the high UV-barrier property. The tensile strength (TS) and elastic modulus (E) of the composite film increased by 18-32% and 55-100%, respectively, while the elongation at break (EB) decreased by 23-33%. CMC composite films showed strong antibacterial activity against E. coli and L. monocytogenes.
壳聚糖纳米纤维（ChNW）被分离出来并用于合成杂化 ChNW/ZnO-Ag NPs。这些混合纳米粒子用于制备多功能羧甲基纤维素（CMC）薄膜。ChNW 呈针状，宽度为 8-40nm，长度为 150-260nm，结晶度指数为 93.6%。ZnO-Ag NPs 呈球形，直径为 10.5-16.2nm。STEM、EDX、XRD 和 UV-vis 分析证实了 ZnO-Ag NPs 在 ChNW 表面的形成。掺入 ZnO-Ag NPs 提高了 ChNW 的热稳定性。一种基于 CMC 的纳米复合材料薄膜，掺入 5wt%的 ChNW/ZnO-Ag NPs，均匀且具有高的 UV 阻隔性能。复合薄膜的拉伸强度（TS）和弹性模量（E）分别提高了 18-32%和 55-100%，而断裂伸长率（EB）降低了 23-33%。CMC 复合薄膜对大肠杆菌和单核细胞增生李斯特菌表现出很强的抗菌活性。
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