UV固化型载银石墨烯/聚氨酯-丙烯酸酯抗菌乳液的制备与表征

Preparation and Characterization of UV Curing Silver-Loaded Graphene/Polyurethane-Acrylate Antibacterial Emulsion

摘要:

通过原位聚合法，在吸附银离子的异氰酸酯功能化石墨烯表面引入双键，再与制得的聚氨酯-丙烯酸酯进行掺杂，紫外固化后制备出载银石墨烯/聚氨酯-丙烯酸酯（IGAH/WPUA）乳液。采用FTIR、XPS、XRD、TEM、SEM、抗菌性能、机械性能和电化学等测试手段对复合物的结构和性能进行表征，探究了IGAH质量分数和光照时间对复合材料各项性能的影响。结果表明，当IGAH质量分数（占WPUA质量，下同）为2%时各项性能趋于稳定，水洗144 h后对大肠杆菌和金黄色葡萄球菌的抗菌率仍能达到99.9%和99.5%；体积电阻率为1.16×107Ω·㎝，表面电阻为3.75×108Ω，复合材料具有优良的抗静电性；T10%从纯WPUA的296.51℃增大到308.50℃。

Abstract:

The double bond was introduced on the surface of the isocyanate functionalized graphene adsorbing silver ions by in-situ polymerization. Which will next be doped with the polyurethane-acrylate emulsion. And then silver-loaded graphene/polyurethane-acrylate (IGAH/WPUA) emulsion was prepared by ultraviolet curing. The structure and properties of the composites were characterized by FTIR, XPS, XRD, TEM, SEM, antibacterial properties, mechanical properties and electrical properties. Moreover, the effect of IGAH mass fraction and illumination time of composite was investigated. The results show that the performance tends to be stable when the IGAH mass fraction is 2% (based on the mass of WPUA). After washing 144 h, the antibacterial rate against Escherichia coli and Staphylococcus aureus can still reach 99.9% and 99.5%. The volume resistivity is 1.16×107 Ω·cm, and surface resistance is 3.75×108 Ω. These confirmed that the composite material has excellent antistatic property. T10% increases from 296.51 °C of pure WPUA to 308.50 °C.