纳米二氧化钛/石墨烯改性水性聚氨酯抗菌涂料的制备与评价

通过简单高效的方法制备纳米二氧化钛 /还原氧化石墨烯（ TiO₂/rGO）复合材料，对复合材料进行红外光谱（ FT-IR）、扫描电镜（ SEM）以及 X射线衍射（XRD）表征，结果表明：成功制备了氧化石墨烯、锐钛型纳米 TiO₂，并将纳米 TiO₂均匀负载于氧化石墨烯片层，经水热还原得到 TiO₂/rGO复合材料。将制备的 TiO₂/rGO复合材料添加到水性聚氨酯涂料中，制备涂膜并测定其光催化降解能力，结果表明：纳米 TiO₂/rGO填料复合的聚氨酯涂膜具有较高的光催化能力。依据 HG/T 3950—2007标准测定涂膜抗菌性能，结果表明：水性聚氨酯涂料的抗菌能力达到国家 Ⅰ级标准，可以有效替代有机抗菌剂。该环保复合涂料在物理性质和应用性能上均符合化工行业标准要求。

Preparation and Evaluation of Nano-TiO2/rGO Modified Antibacterial Waterborne Polyurethane Coatings

The title nano-TiO₂/reduced graphene oxide（rGO）composites was synthesizedby using a simple and efficient technology. The composites were characterized by infraredspectroscopy（FT-IR），scanning electron microscopy（SEM）and X-ray diffraction（XRD）. The results showed that nano-TiO₂ was finely loaded on the rGO sheets. The prepared TiO₂/rGOcomposite materials were added into waterborne polyurethane coatings. The coatings filmswere prepared and their photocatalytic degradation abilities were determined. The resultsshowed that the nano-TiO₂/rGO filled composite polyurethane coatings films provided highphotocatalytic degradation ability. The anti-bacterial abilities of the coatings films weredetermined according to the HG/T 3950—2007 standard. The ability of anti-bacteria met the level I in national standard，which could effectively replace the organic anti-bacterial agents.The environmentally friendly composite coatings was conformed to the requirements of the chemical industry standards in terms of physical properties and application properties.