水溶液合成纳米银／纳米微晶纤维素复合物及其抗菌性能

Aqueous synthesis of nano-silver/cellulose nanocrystalline composites and antibacterial activities

摘要:

以环境友好的高分子材料纳米微晶纤维素（CNC ）为载体，在水溶液中合成了Ag/CNC纳米复合物。结果表明，在超声的作用下，Ag＋被还原为纳米银负载于CNC上，CNC可以明显防止纳米银粒子团聚，且该纳米复合物在水中具有良好的可溶性。经透射电子显微镜T EM检测，超声反应60 min时，有足够多的纳米银均匀地负载于CNC上，所制得的Ag/CNC纳米复合物中的纳米银呈球形、粒径为30～50 nm、粒子大小较为一致，并均匀地覆盖于CNC表面上。抗菌性测试表明，该复合物具有优异的抗菌性能。

Abstract:

Ag/CNC composites were successfully synthesized using an environment-friendly polymer mate-rial of CNC (cellulose nanocrystals) as the carrier in aqueous solution .The results showed that nano-silver could be deposited on the CNC under the power of ultrasound .The CNC could obviously prevent the silver nanoparticles agglomeration ,and the Ag/CNC composites had good solubility in water .Uniform silver nanoparticles deposited on the CNC with ultrasonic reaction of 60 min were observed by TEM .And the silver nanoparticles had size of 30~50 nm ,spherical structure ,uniform size ,good dispersion and uniform surface coverage .Further investigating of the composites characteristics ,it indicated that the composites had excellent antibacterial properties .