Ag/RGO/纤维素复合纸的制备及性能研究

Study on Preparation and Properties of Ag/RGO/Cellulose Composite Paper

本研究将Ag/纤维素和氧化石墨烯(GO)/纤维素均匀混合,利用抽滤工艺和水合肼还原法制备Ag/RGO/纤维素复合纸。利用X射线光电子能谱仪和扫描电子显微镜表征了Ag/RGO/纤维素复合纸的结构和形貌,并研究了复合纸的导电性、机械强度、热稳定性和抗菌活性。结果表明,Ag/纤维素和RGO/纤维素紧密结合在一起,Ag/RGO/纤维素复合纸的电导率为0.042 S/cm,低于Ag/纤维素纸的电导率。Ag/RGO/纤维素复合纸的杨氏模量和断裂伸长率分别为489 MPa和4.5%,相比纤维素纸分别提高了12.9%和7.1%;第二阶段热解开始温度为300℃,相比纤维素纸提高了40℃。Ag/RGO/纤维素复合纸具有优良的抗菌活性,对大肠杆菌和金黄色葡萄球菌的抑菌圈直径分别为14 mm和9 mm。

Ag/cellulose fibers and graphene oxide(GO)/cellulose fibers were uniformly mixed,and then Ag/RGO/cellulose composite paper were obtained by vacuum filtration process and hydrazine hydrate reduction.The structure and morphology of prepared Ag/RGO/cellulose composite paper were characterized by X-ray photoelectron spectrometer and scanning electron microscope.The electrical conductivity,mechanical strength,thermal stability and antimicrobial activity of composite paper were studied.The result indicated that Ag/cellulose fibers and RGO/cellulose fibers knited together tightly.The conductivity of Ag/RGO/cellulose composite paper was 0.042 S/cm,which was lower than that of Ag/cellulose paper.The Young's modulus and elongation at break of Ag/RGO/cellulose composite paper were 489 MPa and 4.5%,respectively,which were 12.9% and 7.1% higher than that of cellulose paper.The initial pyrolysis temperature in the second stage was 300℃,which was 40℃ higher than that of cellulose paper.Ag/RGO/cellulose composite paper had excellent antibacterial activity,and the diametres of zone of inhibition against Escherichia coli and Staphylococcus aureus were 14 mm and 9 mm,respectively.