The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education and National Engineering Lab for Textile Fiber Materials & Processing Technology, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China.
The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education and National Engineering Lab for Textile Fiber Materials & Processing Technology, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Carbohydr Polym. 2017 Oct 1;173:7-16. doi: 10.1016/j.carbpol.2017.05.064. Epub 2017 May 25.
Ternary nanocomposites including cellulose nanocrystals/silver nanohybrids (CNC-Ag) and biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) were prepared by using solution casting. The effect of different AgNPs contents in the nanohybrids on crystallization ability and properties of PHBV was comprehensively investigated. Compared to binary PHBV/CNC nanocomposite, the ternary nanocomposites with high AgNPs contents showed larger improvements in the thermal stability, mechanical, barrier, overall migration and antibacterial properties. The property transitions at various AgNPs contents were due to transition of the nanohybrids induced PHBV crystallization ability (from single CNC nucleation to synergistic nucleation of CNC and AgNPs), and increased crystallinity without compromising the amounts of hydrogen bonds. Especially, the PHBV/CNC-Ag-1.7 showed the good barrier property and lower migration levels in food simulants, high antibacterial ratio of 99.9% and biocompatibility to human MG-63 cells, suggesting its potential application in food packaging related materials.
采用溶液浇铸法制备了包括纤维素纳米晶体/银纳米杂化物（CNC-Ag）和可生物降解的聚（3-羟基丁酸-co-3-羟基戊酸）（PHBV）的三元纳米复合材料。研究了纳米杂化物中不同 AgNPs 含量对 PHBV 结晶能力和性能的影响。与二元 PHBV/CNC 纳米复合材料相比，高 AgNPs 含量的三元纳米复合材料在热稳定性、力学性能、阻隔性能、整体迁移和抗菌性能方面有较大的提高。在各种 AgNPs 含量下的性能转变是由于纳米杂化物诱导 PHBV 结晶能力的转变（从单一 CNC 成核到 CNC 和 AgNPs 的协同成核），以及结晶度的增加，而不会影响氢键的数量。特别是，PHBV/CNC-Ag-1.7 具有良好的阻隔性能和较低的食品模拟物迁移水平，对人 MG-63 细胞的抗菌率达到 99.9%，具有生物相容性，表明其在食品包装相关材料中有潜在的应用。
