负载银纳米簇功能纸的制备及其抗菌性能研究

Preparation and Antibacterial Properties of Functional Paper Loaded with Silver Nanoclusters

关键词:  银纳米簇  抗菌活性  功能纸  荧光

Key Words:silver nanoclusters  antibacterial  functional paper  fluorescence

摘要:银纳米簇具有优越的荧光发射及抗菌活性，如将其负载在纸上，可赋予纸发光及抗菌性能。本研究通过在漂白硫酸盐桉木浆上接枝聚丙烯酸，然后利用光诱导还原银离子的方法在纸浆上原位合成银纳米簇，最后抄造成纸张，实现银纳米簇在纸上的负载。在合成银纳米簇过程中，修饰到纤维素上的羧酸根起到了螯合剂、模板剂和还原剂等三重作用。荧光光谱分析表明，制得的负载银纳米簇纸浆具有荧光发射性能，其最优激发波长为355 nm，发射波长为555 nm，且成纸后的荧光发射性得以保留。负载银纳米簇后纸张白度略有降低，当负载银纳米簇纸浆含量为10%时，纸张抗张指数最优为39.3 N·m/g。抑菌实验表明，所得纸张具有良好的抗菌性能，其抗菌圈直径为14 mm。

Abstract:Silver nanoclusters have excellent fluorescence emission properties and antibacterial activity， if they are loaded on paper， it can give the paper luminescence and antibacterial properties. In this study， the silver nanoclusters were successfully prepared on polyacrylic acid grafted cellulose by photoinduced reduction of silver nitrate. Finally， the cellulose loaded with silver nanoclusters was made into paper by traditional papermaking process， therefore， the process of loading of silver nanoclusters on paper realized. In the process of preparing silver nanoclusters， the carboxylate radical modified to the cellulose pulp played a triple roles of chelating agent， template and reducing agent. The fluorescence spectrum analysis showed that the prepared pulp exhibited fluorescence emission performance， and the optimal excitation wavelength and fluorescence emission wavelength were 355 nm and 555 nm respectively， which suggested that silver nanoclusters were successfully prepared. After the pulp was made into paper， the paper still retained the fluorescence emission properties of silver nanoclusters. In addition， the functional paper had good whiteness and excellent antibacterial properties， and the antibacterial experiment showed that the diameter of the antibacterial circle was 14 mm， when silver nanoclusters pulp content was 10%， the tensile index of functional paper was 39.3 N·m/g， which will make the functional paper had potential applications in the field of antibacterial filter membrane and packaging.