纳米银颗粒/纳米纤维素复合材料的水热法制备及其抗菌性能

Fabrication of AgNPs/Nanocellulose Composite via Hydrothermal Method and Its Antibacterial Properties

关键词:  纳米银颗粒  纳米纤维素  抗菌材料  水热法

Key Words:silver nanoparticles  nanocellulose  antibacterial materials  hydrothermal method

摘要:本研究以TEMPO氧化纳米纤维素（TOCNF）为唯一载体和分散剂，AgNO₃溶液为银源，通过水热法合成纳米银颗粒（AgNPs），制备纳米银颗粒/纳米纤维素复合材料（Ag-CNF），并探究了TOCNF含量和Ag⁺浓度对Ag-CNF性能的影响。结果表明，在1% TOCNF和10 mmol/L Ag⁺条件下合成的AgNPs分散均匀，无明显大颗粒聚集，其平均粒径为22.3 nm，对大肠杆菌（E. coli）和金黄色葡萄球菌（S. aureus）分别表现出直径为2.70 mm和3.50 mm的抑菌圈，具备良好的抗菌性能。

Abstract:In this study， silver nanoparticles （AgNPs） were synthesized via hydrothermal method， and the AgNPs/nanocellulose composite （Ag-CNF） was prepared with TEMPO oxidized nanocellulose （TOCNF） as only carrier and dispersant， AgNO₃ solution as the silver source. The effects of TOCNF content and Ag⁺ concentration on Ag-CNF properties were investigated. The results showed that the AgNPs synthesized with 1% TOCNF and Ag⁺ concentration of 10 mmol/L were evenly dispersed with no significant aggregation of large particles， of which the average particle size was 22.3 nm. The diameter of inhibition zone were 2.70 mm and 3.50 mm for Escherichia coli （E. coli） and Staphylococcus aureus （S. aureus）， respectively， showing a good antibacterial performance.