纤维素纳米纤维和银纳米粒子增强了聚乙烯醇纳米复合材料薄膜的机械性能和抗菌性能。
Cellulose nanofibrils and silver nanoparticles enhances the mechanical and antimicrobial properties of polyvinyl alcohol nanocomposite film.
机构信息
Chemistry Department, Jomo Kenyatta University of Agriculture and Technology, P.O Box 62, Nairobi, 000-00200, Kenya.
Faculty of Agriculture, Department of Biochemistry, AL-Azhar University, Cairo, Egypt.
出版信息
Sci Rep. 2022 Nov 8;12(1):19005. doi: 10.1038/s41598-022-23305-7.
Recent findings of microplastics in marine food such as fish, crabs and shrimps necessitate the need to develop biodegradable packaging materials. This study reports on the development of a biodegradable packing material from cellulose nanofibril-polyvinyl alcohol nanocomposite embedded with silver nanoparticles. Microcrystalline cellulose was isolated from sugarcane bagasse via the kraft process followed by conversion of cellulose I to cellulose II using NaOH/urea/water solution. The nanofibrils were then isolated using (2,2,6,6-Tetramethylpiperidin-1-yl) oxyl (TEMPO) and used as a reinforcing element in polyvinyl alcohol composite prepared through solvent casting. The tensile strength, water solubility, optical properties, water vapor permeability and wettability of the prepared films were then evaluated. The antimicrobial potency of the films was evaluated using the disc diffusion antimicrobial assay against selected microorganisms.
最近在鱼类、螃蟹和虾等海洋食品中发现了微塑料，这就需要开发可生物降解的包装材料。本研究报告了一种由纤维素纳米纤维-聚乙烯醇纳米复合材料嵌入银纳米粒子制成的可生物降解包装材料的开发。微晶纤维素是通过硫酸盐法从甘蔗渣中分离出来的，然后使用 NaOH/尿素/水溶液将纤维素 I 转化为纤维素 II。然后使用（2,2,6,6-四甲基哌啶-1-基）氧自由基（TEMPO）分离纳米纤维，并将其用作通过溶剂浇铸制备的聚乙烯醇复合材料中的增强元素。然后评估了制备薄膜的拉伸强度、水溶性、光学性质、水蒸气透过率和润湿性。使用圆盘扩散法对抗所选微生物评估了薄膜的抗菌效力。
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